24年12月19日文献情报（20篇）

24年12月19日文献情报

1. 题目: MOF biochar composites for environmental protection and pollution control

文章编号: N24121920
期刊: Bioresource Technology
作者: Samaneh Ghaedi, Hamid Rajabi, Mojgan Hadi Mosleh, Majid Sedighi
更新时间: 2024-12-19
摘要: Research studies on Metal Organic Frameworks (MOF) based composites and their potential applications in environmental engineering and pollution control have recently emerged. An attractive material to form MOF composites is biochar (BC); a low-cost, highly porous carbonaceous by-product of biomass pyrolysis. This paper presents a critical review on MOF-biochar composites, focusing on fabrication, characterisation, modification, and applications in environmental protection and pollution control. The adsorption mechanisms and influential parameters are systematically examined to develop an insight into interactions between MOF and biochar in remedial process. The adsorption capacity of composites is generally doubled compared to the standalone biochar, while MOFs maintain their crystallinity, even over multiple regeneration cycles, indicating the composites’ long-term applicability and sustainability. These findings highlight the potential of MOF-biochar composites for environmental applications and identify key areas for further research to enhance their sustainability in environmental protection and green energy.
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2. 题目: A sustainable approach to enhancing humic acid production from lignocellulose via green alum

文章编号: N24121919
期刊: Journal of Environmental Chemical Engineering
作者: Jinting Su, Ziyun Liu, Lixin Zhao, Lili Huo, Weiming Yi, Zhihe Li, Lihong Wang, Zonglu Yao
更新时间: 2024-12-19
摘要: Artificial humic acid (A-HA) produced from biowaste via hydrothermal conversion demonstrates as a promising advanced soil organic matter supplement. However, its low production yield, and poor physicochemical properties, such as high molecular weight and inert function groups, limit the practical application. This study investigated the potential of green vitriol (GV) on stimulate A-HA production and modify the its qualities. The yield of A-HA increased from 21.87 wt% to 27.84 wt% with a ratio of biomass to GV was 6 at 220°C, while the optimum proportion of A-HA in hydrochar was increased by 13.57 ± 11.06 wt% compared to the control at a temperature of 280°C and a 3:1 addition ratio. In addition, the A-HA molecular weight decreased, and oxygen-containing functional groups (i.e., hydroxyl and carboxyl groups) increased with GV addition, enhancing its the reactivity and hydrophilicity. The related promotion mechanism was proposed, which the oxidative decomposition and humification of difficult-to-break-down substances facilitated by hydroxyl radical(·OH) from the Fenton-like reaction of GV with water. This study helpfully presents a novel strategy for promote production of sustainable and high-quality A-HA.
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3. 题目: Fertilization of potentially toxic element-contaminated soils remediated with reusable biochar pellets using rice straw, pig manure and their derived biochar

文章编号: N24121918
期刊: Environmental Pollution
作者: Yi Wu, Zongwei Wang, Ziyu Xue, Yuhang Yan, Bushra Huma, Yuqian Zhou, Zhongxin Tan
更新时间: 2024-12-19
摘要: Potentially toxic elements (PTEs) are widespread pollutants in agricultural fields, presenting significant challenges to the maintenance of soil ecological functions while simultaneously reducing their concentrations. This study detailed the development of a high-strength reusable silicate magnetic composite biochar sphere (SMBCS) characterized by superior magnetic and adsorption properties, synthesized from natural minerals and biochar. The application of SMBCS over three consecutive remediation cycles led to reductions in cadmium (Cd), lead (Pb), and arsenic (As) concentrations in soil by 28.6%, 26.6%, and 42.9%, respectively, accompanied by corresponding decreases in bioavailability of 52.7%, 49.4%, and 39.4%. The accumulation of Cd, Pb, and As in rice seedlings cultivated in the remediated soil decreased by 79.50-85.47%, 38.05-38.99%, and 39.56-77.10%, respectively. However, the removal of essential mineral nutrients (Al, Fe, K, Ca, Mg, Si, N, Zn, Mn, and Cu) from the soil ranged from 3.26% to 36.28%, which adversely affected seed germination and rice seedling growth. Pre-planting fertilization with rice straw (RS), pig manure (PM), biochar (RSB and PMB), and regenerated SMBCS (RSMBCS1 and RSMBCS2) effectively reduced Cd (0.20-45.40%) and Pb (8.70-35.36%) uptake while enhancing the bioavailability of mineral nutrients, thereby promoting crop growth and physiological traits. The SMBCS-fertilization technique emerges as a viable approach for the removal of PTEs in agricultural soils, facilitating the restoration of ecological functions and ensuring safe agricultural production.
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4. 题目: Reductive Dissolution Mechanisms of Manganese Oxide Mediated by Algal Extracellular Organic Matter and the Effects on 17α-Ethinylestradiol Removal

文章编号: N24121917
期刊: Environmental Science & Technology
作者: Zhicheng Liao, Huan He, Feiyuan Liu, Jingye Cui, Ziwei Guo, Danni Cui, Bin Huang, Hongwen Sun, Xuejun Pan
更新时间: 2024-12-19
摘要: Reductive dissolution of manganese oxide (MnO_x) is a major process that improves the availability of manganese in natural aquatic environments. The extracellular organic matter (EOM) secreted by algae omnipresent in eutrophic waters may affect MnO_x dissolution thus the fate of organic micropollutants. This study investigates the mechanisms of MnO_x reductive dissolution mediated by EOM and examines the effects of this process on 17α-ethinylestradiol degradation. The influences of EOM concentration (1.0–20.0 mgC/L) and pH (6.0–9.0) in both dark and irradiated conditions were assessed. In the dark, EOM was found to facilitate MnO_x reductive dissolution via the ligand-to-metal charge transfer (LMCT). The dissolution was further enhanced under irradiation, with the participation of superoxide ions (O₂^•–). Higher EOM concentrations increased the contents of available reducing substances and O₂^•–, accelerating the reductive dissolution. Higher pH slowed the photoreductive dissolution rates, while O₂^•–-mediated reduction became more important. Polyphenols and highly unsaturated carbon and phenolic formulas in EOM were found to drive the reductive dissolution. Soluble reactive Mn(III) formed through reductive dissolution of MnO_x effectively removed 17α-ethinylestradiol in solution. Overall, the findings regarding the mechanisms behind reductive dissolution of MnO_x have broad implications for Mn geochemical cycles and organic micropollutant fate.
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5. 题目: The importance of organic matter in controlling the metal variability and mobility in seagrass sediments

文章编号: N24121916
期刊: Environmental Pollution
作者: Shanshan Chen, Shiquan Chen, Zhenghua Tao, Yanping Li, Paolo Magni, Li Zhang, Xinqing Zheng, Ke Pan
更新时间: 2024-12-19
摘要: Metal contamination in seagrass beds has been extensively studied in the past decades. Most of earlier studies have focused on reporting metal concentration in different compartments of seagrass ecosystem, with little attention given to the role of sediment organic matter in controlling the metal mobility and bioavailability. This study investigated metal contamination in seagrass sediments in Hainan Island, China and illustrated how various geochemical factors impact the spatial variability of the metal concentrations. Particularly, we explored how organic matter influence metal storage and mobility in the seagrass sediments. The enrichment of metals in these sediments was not only associated with levels of organic matter but also their sources. The organic matter content showed positive correlations with both metal concentrations and acid-extractable fractions of chromium, silver, and cadmium, highlighting its significant role in influencing metal accumulation and mobility in sediments. Overall, this research enhances our understanding of metal cycling within seagrass ecosystems and highlights the vital role of seagrass-derived organic matter in regulating metal dynamics.
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6. 题目: Unveiling the global dynamics of dissolved organic carbon in aquatic ecosystems: Climatic and anthropogenic impact, and future predictions

文章编号: N24121915
期刊: Science of the Total Environment
作者: Yuexia Guo, Haoran Peng, Qirui Wang, Jiaqi Wang, Zhengyu Wu, Bo Shao, Guodong Xing, Zhao Huang, Feng Zhao, Hongyang Cui, Xiaoyu Cui, Yindong Tong
更新时间: 2024-12-19
摘要: Dissolved organic carbon (DOC) and its biodegradability (BDOC%) in aquatic ecosystems significantly impact the global carbon cycle, varying greatly across rivers, lakes, and estuaries due to environmental and anthropogenic factors. However, a thorough understanding of these variations is still lacking. This study investigated the interactions between climate, hydrology, physiography, soil, land cover, and human activity on DOC dynamics in rivers, lakes, and estuaries. Utilizing a robust dataset comprising 744 global data points for DOC concentrations (0.18–29.33 mg/L) and 341 samples for BDOC% (0.44 %–81.12 %), spanning a wide range of geographic and climatic gradients across six continents, machine learning techniques were employed to elucidate the relationships between DOC and BDOC% and environmental and anthropogenic factors and to develop predictive models for global DOC and BDOC storage. Results showed that climate primarily affected DOC and BDOC% levels, with other factors varying by ecosystem type. In rivers, soil and human activity had positive influences, while in lakes, hydrology had a positive effect and human activity had a negative one. In estuaries, soil positively impacted the levels of DOC and BDOC%, whereas human activity had a negative effect. Furthermore, we created separate random forest models for DOC and BDOC% based on different factors in each aquatic ecosystem (R² = 0.50–0.89), and applied to data of environmental and anthropogenic factors worldwide, predicting DOC and BDOC storage for 181 countries. Notably, large countries like Canada, Russia, the United States (U.S.), Brazil, and China accounted for 76.07 % and 51.56 % of the total global DOC and BDOC storage, respectively. Storage prediction models under future climate scenarios indicated significant impacts in Europe under the high fossil fuel use scenario. Thus, prioritizing high-storage, climate-vulnerable areas is essential for effective climate change strategies, aiding in the protection of aquatic ecosystems, maintaining the global carbon balance, and promoting sustainable development.
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7. 题目: Climate, plant and microorganisms jointly influence soil organic matter fractions in temperate grasslands

文章编号: N24121914
期刊: Science of the Total Environment
作者: Yunlong Hu, Liangchen Fu, Gukailin Ao, Chengjun Ji, Hui Zeng, Biao Zhu
更新时间: 2024-12-19
摘要: Soil organic carbon (SOC) plays a critical role in mitigating climate change. Conceptualizing SOC into particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) helps us more accurately predict the responses of organic carbon, with varying chemical composition, molecular size, and degree of association with soil minerals, to environmental changes. To assess the controlling factors of particulate organic carbon (POC) and mineral-associated organic carbon (MAOC), plant and soil samples were collected from 54 temperate grassland sites in Northern China, and the impacts of climate, plants, soil properties and microorganisms on POC and MAOC contents were analyzed. The results indicated that POC slightly dominated temperate grassland topsoils. Climate, plants, and microorganisms could predict a significant portion of the variation in POC and MAOC contents. Microbial factors, represented by fungal and bacterial biomass and necromass carbon, explained 56.6 % and 46.7 % of the variation in POC and MAOC contents, respectively. These findings indicate that the potential of POC in soil carbon storage cannot be ignored, and microorganisms should be considered when studying the dynamics and accumulation of POC and MAOC.
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8. 题目: Selective adsorption of copper by amidoxime modified low-temperature biochar: Performance and mechanism

文章编号: N24121913
期刊: Science of the Total Environment
作者: Min Yang, Shumeng An, Haibo Gao, Zhongcheng Du, Xiaolei Zhang, Long D Nghiem, Qiang Liu
更新时间: 2024-12-19
摘要: Biochars prepared at 300–700 °C were functionalized with amidoxime groups to evaluate their selective adsorptive removal capabilities towards Cu(II), Cd(II), and Pb(II). The results show that the amidoxime modification significantly enhanced the the Cu(II) adsorption capacity of the biochar prepared at 300 °C (AOBC300) by 1.6 times, reaching 0.61 mmol/g. In binary and ternary heavy metal solutions, AOBC300 exhibited preferential adsorption of Cu(II), followed by Pb(II) and Cd(II). High salinity, alkaline earth metal ions, humic substances, and other metal cations had minimal interference on the adsorption of heavy metals by AOBC300. Sample characterization revealed that amidoxime modification reduced the zeta potential and increased the hydrophilicity of the biochar. XPS analysis demonstrated that both N and O atoms of the amidoxime group are involved in the adsorption process, contributing to AOBC300's strong affinity for heavy metal ions. DFT calculations further confirmed the adsorption preference of different heavy metals on AOBC300. This study demonstrates that amidoxime grafting is an effective protocol for refining low-temperature biochar, aimed at efficiently eliminating heavy metals from waste streams.
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9. 题目: Soil carbon change in intensive agriculture after 25 years of conservation management

文章编号: N24121912
期刊: Geoderma
作者: S Carolina Córdova, Alexandra N Kravchenko, Jessica R Miesel, G Philip Robertson
更新时间: 2024-12-19
摘要: Changes in soil organic carbon (SOC) and nitrogen (SON) are strongly affected by land management but few long-term comparative studies have surveyed changes throughout the whole soil profile. We quantified 25-year SOC and SON changes to 1 m in 10 replicate ecosystems at an Upper Midwest, USA site. We compared four annual cropping systems in maize (Zea mays)-soybean (Glycine max)-winter wheat (Triticum aestivum) rotations, each managed differently (Conventional, No-till, Reduced input, and Biologically based); in three managed perennial systems (hybrid Poplar (Populus × euramericana), Alfalfa (Medicago sativa), and Conifer (Pinus spp.); and in three successional systems (Early, Mid- and Late succession undergoing a gradual change in species composition and structure over time). Both Reduced input and Biologically based systems included winter cover crops. Neither SOC nor SON changed significantly in the Conventional or Late successional systems over 25 years. All other systems gained SOC and SON to different degrees. SOC accrual was fastest in the Early successional system (0.8 ± 0.1 Mg C ha⁻¹ y⁻¹) followed by Alfalfa and Conifer (avg. 0.7 ± 0.1 Mg C ha⁻¹ y⁻¹), Poplar, Reduced input, and Biologically based systems (avg. 0.4 ± 0.1 Mg C ha⁻¹ y⁻¹), and Mid-successional and No-till systems (0.3 and 0.2 Mg C ha⁻¹ y⁻¹, respectively). Over the most recent 12 years, rates of SOC accrual slowed in all systems except Reduced input and Mid-successional. There was no evidence of SOC loss at depth in any system, including No-till. Rates of SON accrual ranged from 64.7 to 0.8 kg N ha⁻¹ y⁻¹ in the order Alfalfa ≥ Early successional > Reduced input and Biologically based ≥ Poplar > No-till and Conifer > Mid-successional systems. Pyrogenic C levels in the Conventional, Early, and Late successional systems were similar despite 17 years of annual burning in the Early successional system (∼ 15 % of SOC to 50 cm, on average, and ∼40 % of SOC from 50 to 100 cm). Results underscore the importance of cover crops, perennial crops, and no-till options for sequestering whole profile C in intensively managed croplands.
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10. 题目: Microplastics affect organic nitrogen in sediment: the response of organic nitrogen mineralization to microbes and benthic animals

文章编号: N24121911
期刊: Journal of Hazardous Materials
作者: Cheng Yang, Ruxin Yang, Yuanyuan Feng, Yin Wang, Qingping Zou, Jianhao Song, Jinjiang Duan, Hongyue Li, Xiangbin Gao, Mengli Chen, Han Zhang
更新时间: 2024-12-19
摘要: Organic nitrogen is a crucial component of the nitrogen element, and its mineralizationby sediment organisms may trigger river eutrophication. Microplastics (MPs), as emerging contaminants, influence nitrogen cycling in sediments. However, the response of organic nitrogen mineralization to sediment organisms (microbes and benthic animals) under MPs pollution remains unclear. This study used microcosm experiments and structural equation modeling to explore the effects of benthic animals and sediment microbes on organic nitrogen mineralization in the presence of polystyrene, polypropylene, and polylactic acid. Compared to the sediment without MPs, the addition of MPs caused a 17% decrease in ammonium concentration. However, benthic animals enhanced the organic nitrogen mineralization, resulting in a 63% increase in ammonium concentration. MPs pollution also significantly increase the nodes and edges in the microbial network and decrease the abundance of the organic nitrogen mineralization gene (UreC). In contrast, benthic animals reduce the microbial network complexity, shape keystone microbes (Lysobacter, Flavobacterium, Terrimonas, and Pontibacter), and enhanced UreC abundance. Structural equation modeling was conducted to confirm that benthic animals regulate keystone microbes, thereby promoting organic nitrogen mineralization. These findings indicate that the bioturbation by benthic animals may give arise to a sustained increase in ammonium concentrations in rivers polluted by MPs, therefore, exacerbate river eutrophication.
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11. 题目: Unraveling the interaction of algogenic organic matter and cells on membrane fouling mechanism during treatment of Microcystis aeruginosa-laden water

文章编号: N24121910
期刊: Separation and Purification Technology
作者: Zimin Wang, Shi Zhang, , Xiaomiao Zang, Rabail Zulekha, Haiyang Zhang, Xuezhi Zhang
更新时间: 2024-12-19
摘要: Membrane technology is widely used for algal bloom treatment due to its effective separation capabilities. However, the effect of algal cell interaction with AOM on the membrane fouling mechanism remains unclear. This study systematically investigated the filtration characteristics of algal cells and AOM, individually and in combination. The mechanism of membrane fouling was explored through the distribution of organic components, algal cake structure, interfacial free energy, and changes in the functional groups in cross-fouling. The mitigation effects of pretreatment additives, including diatomite, powdered activated carbon (PAC), and plant cotton, on interaction fouling were evaluated. The results revealed that the interaction between algal cells and AOM had a synergistic effect, significantly increasing membrane resistance. The presence of algal cells facilitated the transformation of some irreversible fouling into reversible fouling. Compared with cells, AOM exhibited higher adhesion-free energy with the membrane, with higher AOM concentrations notably elevating both Ri and Rir. Confocal laser scanning microscopy (CLSM), scanning electron microscope, and atomic force microscope (AFM) observations revealed that protein volume fractions increased with cake layer thickness during cross-fouling, while polysaccharides preferentially deposited on the membrane surface. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses further indicated that polysaccharides are critical in membrane fouling, while proteins were more likely to cause reversible fouling within the cake layer. Notably, diatomite significantly reduced the interaction fouling coefficient by optimizing the cake layer structure. These findings provide valuable insights for controlling membrane fouling based on the characteristics of cells and AOM.
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12. 题目: Effects of pH on the differential absorbance spectra, d-d transition bands and structural properties of copper complexes with humic substances and model compounds

文章编号: N24121909
期刊: Chemosphere
作者: Chenyang Zhang, Po-An Chen, Andrey M Kuznetsov, Alexey N Masliy, Mingquan Yan, Gregory V Korshin
更新时间: 2024-12-19
摘要: Interactions between metal cations, notably Cu(II), and humic substances (HS) affect their mobility, bioavailability, and toxicity. This necessitates a molecular-level determination of the nature of HS functional groups binding Cu(II) (Cu-HS) and effects of pH on them. This study investigates the pH effects on the spectroscopic and structural properties of the complexes of Cu(II) with HS and representative model compounds using differential absorbance spectroscopy (DAS), examination of the properties of the d-d transition band characteristic for Cu(II) ions, and quantum chemical (QC) calculations. DAS of Cu-HS show distinct bands at 240, 275, 310 and 400 nm, while absorbance features located from 600 to 800 nm correspond to the d-d transitions in Cu(II). Similar features appear in copper complexes with the model compounds of salicylic acid (Cu-Sal) and poly(4-styrenesulfonic acid-co-maleic acid) (Cu-PSM). Increasing pH resulted in consistent changes of the DAS and the d-d band of Cu(II) which exhibited a hypsochromic shift and increased intensity. Deconvolution of the d-d bands into discrete Gaussian bands was indicative of transitions between dominant species at increasing pH. Cu-Sal and Cu-PSM structures that were modeled successfully by QC calculations. These results demonstrate the sensitivity of DAS spectra and d-d band to the modes of Cu(II) binding by HS and open a possibility of further elucidation of the functional groups engaged in the binding of heavy metals by HS.
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13. 题目: Molecular insights into transformation of dissolved organic matter in treating shale gas wastewater by the UV/H2O2-ultrafiltration-reverse osmosis combined process

文章编号: N24121908
期刊: Separation and Purification Technology
作者: Jingyu Shu, Peng Tang, Xuanyu Ji, Peng Liu, Guanyu Zhou, Zhiwei Gan, Jun Ma, Baicang Liu
更新时间: 2024-12-19
摘要: The integration of oxidation and membrane technologies demonstrates significant potential in shale gas wastewater (SGW) treatment. However, the molecular-level transformation mechanisms of the complex dissolved organic matter (DOM) in SGW during this coupled process remain unclear. This study systematically assessed the performance of UV/H₂O₂-ultrafiltration (UF)-reverse osmosis (RO) combined process in removing contaminations from SGW and used Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to elucidate the transformation characteristics and mechanisms of DOM during treatment. At an optimal H₂O₂ dosage (100 mg/L), UV/H₂O₂ oxidation removed 16.76 % of UV₂₅₄ and 12.96 % of fluorescent dissolved organic matter, while achieving only 4.50 % removal of dissolved organic carbon, indicating that structural transformations of DOM were predominant over mineralization. FT-ICR MS analysis showed that UV/H₂O₂ significantly increased DOM saturation and oxidation, effectively degrading highly aromatic compounds such as polyphenols and polycyclic aromatic hydrocarbons, with a preferential removal of reduced organic compounds. Mass difference analysis, based on 19 transformation reactions, identified dealkylation, oxygenation, dehydrogenation, dehydration, and decarboxylation as common reactions during UV/H₂O₂ treatment, with demethylation being the most dominant and CHNOS compounds exhibiting the highest reactivity. UF treatment had minimal impact on DOM molecular structure, whereas RO effectively rejected most DOM. Due to steric hindrance and electrostatic repulsion, RO preferentially removed organic compounds with high m/z, high O/C, and high unsaturation. Additionally, linear alkyl benzene sulfonates showed a relatively high abundance in RO effluent due to its high ionization efficiency, while non-mineralized DOM was concentrated in the RO concentrate. This study provides crucial insights into the optimization of oxidation-membrane combined processes for SGW treatment at the molecular level.
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14. 题目: Abatement of methylene blue and diazinon pesticide from synthetic solutions using magnetic biochar from pistachio shells modified with MOF-808

文章编号: N24121907
期刊: Environmental Research
作者: Sattam Fahad Almojil, Abdulaziz Ibrahim Almohana
更新时间: 2024-12-19
摘要: This study develops a magnetic composite from pistachio shell biochar (PSBC/CoFe₂O₄) modified with MOF-808 for removing methylene blue (MB) dye and diazinon (DA) pesticide from water. The composite, with a surface area of 151.53 m²/g and magnetic saturation of 19.653 emu/g, allowed easy separation from solutions. Key adsorption factors such as pH, temperature, contact time, adsorbent dosage, and initial pollutant concentration were optimized. Maximum removal efficiencies of 99.32% for MB and 99.14% for DA were achieved at adsorbent dosages of 1 g/L for MB and 1.5 g/L for DA, initial concentrations of 5 mg/L, temperatures of 55 °C, contact times of 60 minutes for MB and 80 minutes for DA, and pH levels of 9 for MB and 6 for DA. Thermodynamic analysis confirmed that the adsorption process is spontaneous and endothermic, with enthalpy values of 55.091 kJ/mol for MB and 42.028 kJ/mol for DA, while entropy values indicated increased randomness during adsorption. Kinetic studies revealed that adsorption involved both physical and chemical interactions, with intraparticle diffusion not being the rate-limiting step. The Freundlich isotherm model provided the best fit (R² = 0.971 for MB and 0.988 for DA), highlighting heterogeneous surface interactions. The composite showed higher adsorption capacities for MB (31.44 mg/g) than for DA (21.49 mg/g) and exhibited excellent regeneration potential, performing better in deionized water due to the inhibitory effects of salts in non-deionized water.
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15. 题目: Co-governance of Iron Speciation and Carbon Phase on Fenton-like Reaction Triggered by Fe-enriched Industrial Sludge Derived Biochar

文章编号: N24121906
期刊: Journal of Cleaner Production
作者: Wenjia Wei, Xiaofei Wen, Shengkun Zhang, Lvren Lin, Jinmei Zhu, Jianming Yu, Jiansheng Li, Zimo Lou, Xinhua Xu
更新时间: 2024-12-19
摘要: Upcycling iron-rich industrial sludge into Fe-enriched biochar for triggering Fenton-like reaction is proposed as a ‘waste control by waste’ idea. However, the structure-activity relationship between biochar and its decontamination performance remains largely unclear. Herein, with primary sludge (from a textile dyeing industry) derived biochar (PSDB) as a representative, we unveil that the activation of H₂O₂ (6 mM) by PSDB (1 g L⁻¹) for 4-chlorophenol (4-CP) removal highly depends on the iron speciation and carbon phase. With rising pyrolysis temperature, Fe minerals in PSDB undergo valence change from amorphous tri- and divalent Fe oxides (PSDB-400) to crystalline Fe₃O₄ (PSDB-600), Fe⁰ (PSDB-800), and partially evolve to iron phosphide and sulfide (PSDB-1000). Correspondingly, aliphatic labile fraction and dissolved carbon phase in PSDB-400 evolve into aromatic stable fraction and undissolved phase in PSDB-1000, as suggested by 83.5% reduction in dissolved organic carbon, and 50.1% increase in aromatic carbon proportion. PSDB-400/PSDB-600 tends to degrade 4-CP by leached Fe²⁺-mediated homogeneous Fenton reaction, while PSDB-800/PSDB-1000 achieves rapid 4-CP adsorption and subsequent oxidation through homogeneous/heterogeneous H₂O₂ activation. Reusability test confirms the potential of PSDB-400 as sustaining Fe²⁺ donors for H₂O₂ activation, and the robustness of PSDB-1000 for multiple adsorption-oxidation cycles. This study provides guidance on designing sludge-derived engineered biochar for wastewater purification.
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16. 题目: Effect of anaerobic digested sludge biochar on soil quality improvement: An insight into mechanisms, microbial composition, and toxicity risk assessment

文章编号: N24121905
期刊: Chemosphere
作者: Zhuo Li, Farhan Hafeez, Jing Zhang, Kai Chen, Bizhen Zeng, Feilan Qi, Lan Yang, Hongtao Zhu
更新时间: 2024-12-19
摘要: Biochar is widely acknowledged for its remarkable impact on soil conditioning. However, the influence of different sources of biochar, particularly anaerobic digested sludge biochar (ADBC) derived from anaerobic digested sludge and biochar derived from waste activated sludge, on alkaline soil remains largely unexplored. To address this knowledge gap, a comprehensive field experiment was conducted over a period of 180 days to investigate the effects of ADBC on slightly alkaline soil. This study evaluated various aspects, including soil properties, nutrient content, microbial composition, and soil toxicity. The results demonstrated significant improvements in the quality of alkaline soil following the application of ADBC. Notably, soil pH decreased from 8.24 to 7.5, while conductivity increased from 56.7 μs/cm to 249.0 μs/cm, total organic carbon from 13.5 g/kg to 19.9 g/kg, available nitrogen from 45.5 g/kg to 237.5 g/kg, and available phosphorus from 549.5 g/kg to 1396.7 g/kg. Moreover, ADBC substantially increased the relative abundance of functional bacteria associated with nutrient cycling, such as Proteobacteria, Actinobacteriota, and Bacteroidota. Conversely, the assessment of biotoxicity revealed a decrease in toxicity with increasing preparation temperature and particle size. These findings highlight the promising potential of ADBC for improving the key properties of alkaline and nutrient-poor soils crucial for overall soil productivity.
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17. 题目: Increased sea level rise accelerates carbon sequestration in a macro-tidal salt marsh

文章编号: N24121904
期刊: Science of the Total Environment
作者: Rey Harvey Suello, Daan Temmerman, Steven Bouillon, Zeinab Khalifeh, Marinka van Puijenbroek, Kelly Elschot, Ignace Pelckmans, Thorbjørn Joest Andersen, Chris Smit, Jan Bakker, Stijn Temmerman
更新时间: 2024-12-19
摘要: Salt marshes are known as key ecosystems for nature-based climate mitigation through organic carbon sequestration into their sediment beds, but at the same time they are affected by accelerating sea level rise induced by climate warming. Consequently, an important question is how organic carbon accumulation rates (OCAR) of salt marshes will respond to future accelerating rates of relative sea level rise (RSLR). To date, existing insights are either based on (1) comparison of geographically distant marsh sites, differing in local RSLR rates but also in other environmental conditions that additionally can affect OCAR, or (2) experiments in given marsh sites, in which proxies for RSLR are manipulated, but run over periods of years instead of decades, the latter being the relevant time scale of marsh responses to RSLR. Here we bridge these shortcomings by studying the OCAR over four decades at two nearby salt marsh sites in the Netherlands, with similar environmental conditions, but with one site experiencing an accelerated RSLR rate of 9.7–11.7 mm yr⁻¹ (i.e., within the range of projected global mean sea level rise rates by 2100) due to local land subsidence induced by gas extraction, while the other site does not experience subsidence and has a low background RSLR rate of 2.0 mm yr⁻¹ (i.e. close to the current global mean sea level rise rate). Our results reveal that the salt marsh site experiencing the accelerated RSLR rates shows OCAR values that are on average twice as high as those found in the marsh site experiencing the low background RSLR rates. Moreover, the increase of OCAR in response to faster RSLR was even more pronounced (i.e. 63 % increase) on marsh levees within 10 m from tidal creeks, while this was more subtle (i.e. 27 % increase) in marsh basins at a distance of 30–40 m from the creeks. These observations of increased OCAR are mainly attributed to increased sediment accretion rates (SAR) in response to (1) increased tidal inundation due to accelerated RSLR and (2) larger sediment supply due to closer proximity to creeks, while sediment organic carbon content was relatively little affected. Our findings support expectations that nature-based climate mitigation actions, through salt marsh conservation and restoration, are sustainable on the long term of the coming decades, and are even likely to become more effective with future accelerations in global sea level rise, at least for macrotidal sites not limited by sediment supply.
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18. 题目: Modeling ClO2–NOM Reactions for Predicting Byproduct Formation and Micropollutant Degradation in Surface Water

文章编号: N24121903
期刊: Environmental Science & Technology
作者: Jiadong Peng, Senhao Lu, Chii Shang, Ran Yin
更新时间: 2024-12-19
摘要: Chlorine dioxide (ClO₂) is a promising alternative disinfectant/oxidant to free chlorine in drinking water treatment, while it reacts with natural organic matter (NOM) to form free chlorine, chlorite ions (ClO₂^–), and chlorate ions (ClO₃^–) as byproducts. Predicting the ClO₂ consumption and the formation of these byproducts using a kinetic model helps to balance the trade-off between disinfection/oxidation efficiency and byproduct formation. This study establishes a summative equation to describe the reaction between ClO₂ and ClO₂-reactive moieties in the NOM (CRNOM). The average molar yields of ClO₂^–, free chlorine, Cl^–, and ClO₃^– from the reactions between ClO₂ and nine NOM isolates are determined to be 0.576 ± 0.017, 0.258 ± 0.022, 0.141 ± 0.010, and 0.039 ± 0.002 per consumed ClO₂, respectively. The bimolecular rate constants of CRNOM toward ClO₂ (k_CRNOM-ClO2) are comparable among nine NOM isolates (683 ± 57 M^–1·s^–1 at pH 7.0). The CRNOM concentrations and k_CRNOM-ClO2 increase by 2-fold and 1.3-fold, respectively, as pH increases from 6.0 to 9.0, while pH barely affects the molar yields of inorganic products. A kinetic model is established and enables the accurate prediction of ClO₂^– and ClO₃^– formation and ofloxacin degradation during ClO₂ oxidation in surface water.
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19. 题目: Enhanced nickel removal by N, S co-doped hierarchical porous biochar in capacitive deionization process: Performance and application

文章编号: N24121902
期刊: Chemical Engineering Journal
作者: Baochuan Qi, Yu Li, Li Li, Zhiwei Zhao
更新时间: 2024-12-19
摘要: Despite the effectiveness of capacitive deionization (CDI) in removing heavy metals, several issues exist, particularly the lack of high-performance electrode materials. In this study, a hierarchical porous carbon was synthesized by combining a novel organic potassium salt as a source of N and S, and biochar derived from casuarina leaves (CL). The results revealed that the pyrolysis temperature plays a crucial role in determining the performance of materials. Owing to the synergistic effects of N and S, the etching effects of intermediates, and the appropriate pyrolysis temperature, a well-balanced structure with optimal pore distributions was achieved, facilitating the Ni²⁺ removal from aqueous solution with an impressive adsorption capacity of 36.86 mg g⁻¹. Additionally, the prepared materials demonstrated significant reactivity in CDI systems during cyclic tests and in practical applications involving electroplating wastewater, establishing their considerable potential for real-world use. Density functional theory (DFT) calculations highlighted the essential roles played by N and S in adjusting of carbon frameworks and optimizing electron density distribution. This study introduces a promising approach for designing N, S co-doped biochar materials and broadening the scope of asymmetric CDI in the treatment of electroplating wastewater.
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20. 题目: Tracking the Changes of DOM Composition, Transformation, and Cycling Mechanism Triggered by the Priming Effect: Insights from Incubation Experiments

文章编号: N24121901
期刊: Environmental Science & Technology
作者: Wenrui Yao, Yuanyuan Dong, Yulin Qi, Yufu Han, Jinfeng Ge, Dietrich A Volmer, Zhiyang Zhang, Xueyan Liu, Si-Liang Li, Pingqing Fu
更新时间: 2024-12-19
摘要: The priming effect (PE) is recognized as an important mechanism influencing organic matter transformation in aquatic systems. The land-ocean aquatic continuum (LOAC) has received large quantities of dissolved organic matter (DOM) from various sources, which is an ideal interface for PE research. Here, we investigated the PE process by utilizing such a coastal environment to explore the turnover of DOM in the LOAC system. Suwannee River natural organic matter was selected as the background, and various external environmental samples were introduced to track the changes of organic carbon. The PE process together with the variations of DOM sources, compositions, and structures was characterized. Generally, river and estuary environments exhibited a positive PE, while the offshore zone showed a negative effect. Additionally, nutrients, salinity, and DOM composition all contributed to the PE. After the incubation, the feature of carbon sources transferred from terrestrial to autochthonous. The carbonyl and alcohol functional groups significantly decomposed, while the methyl and methylene groups increased and heteroatoms further accelerated the PE process. The data also shows that special parameters and molecular markers can be utilized to track the carbon response to the PE. This research indicates that the change of carbon flux and the imbalance of its budget in aquatic systems could be partially explained from the perspective of the PE.
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