24年12月11日文献情报（14篇）

24年12月11日文献情报

1. 题目: Calcium forms influence soil organic carbon by mediating labile organic carbon fractions, carbon pool management indices and microbial communities in calcareous alkaline soils

文章编号: N24121114
期刊: Plant and Soil
作者: Xiaolu Dou, Congzhi Zhang, Lin Chen, Qicong Wu, Guixiang Zhou, Donghao Ma, Zhanhui Zhao, Jiabao Zhang
更新时间: 2024-12-11
摘要:

Background and aims

Soil carbon (C) pools influence the global C balance of terrestrial ecosystems. Calcium (Ca) affects soil organic carbon (SOC) by mediating organic-mineral interactions. In this study, we aimed to elucidate the relationships among Ca forms, labile organic carbon (OC) fractions, carbon pool management indices and microbial communities.

Methods

We selected three soils with different calcium carbonate (CaCO₃) contents: black soil (4.29 g.kg⁻¹), fluvo-aquic soil (94.86 g.kg⁻¹) and loessial soil (133.87 g.kg⁻¹). We measured different Ca forms, microbial communities and labile OC fractions while calculating the soil carbon pool management indices.

Results

The results revealed a significant increase in major Ca forms and a significant decrease (P < 0.05) in labile OC fractions as well as carbon pool management indices in fluvo-aquic soil and loessial soil. The bacterial community diversity decreased, and the dominant bacteria and fungi shifted from oligotrophs to copiotrophs. Ca forms were significantly negatively (P < 0.05) correlated with the labile OC fraction and carbon pool management index (CPMI), and the bacterial community structure was closely related to bound to organic-Ca. Bacteria played a dominant role, and the symbiotic network robustness and complexity of the network modules were greater for bacteria than for fungi in calcareous alkaline soils.

Conclusions

The results suggested the existence of interactions between Ca forms, labile OC fractions, the CPMI and microbial communities in calcareous alkaline soils. Ca affects the labile OC fractions, which act on the CPMI and change the community composition of microbial (bacterial communities), influencing the SOC content.

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2. 题目: Soil Microplastic Extraction Efficiency Depends on the Sample Incubation Time and the Organic Matter Removal Agent Used

文章编号: N24121113
期刊: Water, Air, & Soil Pollution
作者: Radosław Stec, Krzysztof Sitko, Marta Pogrzeba, Szymon Rusinowski, Paulina Janota, Izabela Ratman-Kłosińska, Jacek Krzyżak
更新时间: 2024-12-11
摘要:

Environmental pollution by microplastics is now a global problem, as global plastic production is increasing and at the same time recycling of plastic waste is low. In recent years, a number of methods have been developed to determine the content of microplastics in soil. This study compares the efficiency of microplastic extraction in two-week and three-month incubation samples from three different soils artificially contaminated with different types of microplastics. H₂O₂ and KOH were used as agents to remove organic matter. The effects of changing the incubation time were significant in soils with a high organic matter content. A longer incubation time resulted in a lower efficiency of microplastic extraction. Compared to the results obtained with the control method after a two-week incubation, the loose sand samples achieved a similar extraction efficiency (86%), the amount of MP recovered in the uncontaminated sandy clay samples was 75%, while the sandy clay soils contaminated with heavy metals was 44%. The samples without organic matter removal showed a significantly better recovery rate of microplastics than the samples treated with H₂O₂ and KOH.

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3. 题目: Influence of Biofilm and Calcium Carbonate Scaling on Lead Transport in Plastic Potable Water Pipes: A Laboratory and Molecular Dynamics Study

文章编号: N24121112
期刊: Journal of Hazardous Materials
作者: Dibya Kanti Datta, Shahbaz Paramban, Hessam Yazdani, Shawn P Brown, Sarah Fisher, Maryam Salehi
更新时间: 2024-12-11
摘要: This study investigated lead (Pb) transport through new, biofilm-laden, and calcium carbonate-scaled crosslinked polyethylene (PEX-A) and high-density polyethylene (HDPE) potable water pipes. The research focused on Pb accumulation through short-term exposure incidents (6 h) and Pb release for a longer duration (5 d). A mechanistic investigation of the surface morphology variations of plastic pipes following biofilm and scale formation has been conducted. The nanoscale surface asperities in new PEX-A pipes and microscale roughness features in new HDPE pipes supported the differences in biofilm abundance, scale formation, and metal uptake results among these two pipes. Biomass analysis and dissolved organic matter (DOM) quantification using three-dimensional excitation emission spectroscopy revealed a greater release of biofilm biomass during the Pb accumulation and release experiments from biofilm-laden HDPE pipes. Both biofilm-laden plastic pipes accumulated a significantly greater level of Pb compared to the new and scaled pipes. However, scaled pipes showed the highest Pb release, while biofilm-laden pipes released the least. Additionally, investigation of Pb²⁺ exchange from the pipe surface in the presence of Ca²⁺ in the solution indicated that divalent cations in water can trigger further lead release from the pipe surface. Furthermore, the molecular dynamics simulation provided valuable insights into the interaction between different pipe surfaces with Pb with respect to affinity and binding energy.
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4. 题目: Transformative characteristics of aquatic and soil organic matter in a constructed wetland consisting of Acorus, Nuphar, and Typha ponds

文章编号: N24121111
期刊: Science of the Total Environment
作者: Hojung Rho, Jaeweon Cho, Kangmin Chon
更新时间: 2024-12-11
摘要: This study investigated the transformative characteristics of dissolved organic matter (DOM) within constructed wetlands (CWs) and elucidated the distinct interplay between aquatic DOM and soil organic matter (SOM) during different treatment stages. Through comprehensive analyses, including water quality assessments, molecular weight distribution, fluorescence spectrometry, and molecular structure analysis, our investigation revealed profound transformations in aquatic DOM characteristics facilitated by CWs. Notably, the significant increase in dissolved organic carbon (DOC) concentrations within the Typha pond underscored the pivotal role of anaerobic decomposition in organic matter accumulation. Structural analysis indicated a transition toward lipid- and protein-based substances, suggesting robust microbial degradation of aromatic DOMs. Considerable differences between aquatic DOM and SOM were observed, with SOM exhibiting a lower molecular weight and a richer array of oxygen-containing functional groups of organic substances, indicative of soil adsorption processes. This study highlights the transformation of DOM in CWs as a complex interaction between autochthonous and allochthonous sources, in which the soil adsorption of specific organic fractions notably influences the CW ecosystem. Our findings emphasize the capacity of CW to enhance water quality through natural remediation processes and provide valuable insights into optimizing CW design and management for improved wastewater treatment and ecological sustainability.
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5. 题目: Simultaneous removal of cyanobacteria and algal organic matter by Mn(VII)/CaSO3 Enhanced Coagulation: Performance and Mechanism

文章编号: N24121110
期刊: Journal of Hazardous Materials
作者: Lili An, Xin Xu, Feng Yan, Wenjun Du, Ruihua Dai
更新时间: 2024-12-11
摘要: Frequent outbreaks of algal blooms greatly threatened drinking water safety, garnering widespread attention. Mn/CaSO₃ is emerging in the field of organic matter removal with its efficient oxidizing capacity and wide pH application range. The performance of Mn(VII)/CaSO₃ as a pre-oxidation process enhancing coagulation for algae removal (Microcystis aeruginosa, 2 (±0.5) × 10⁶ cells/mL) was investigated. The results suggested that the Mn(VII)/CaSO₃ process efficiently achieved over 90% removal of algae cells, notably with a reduced chemical dosage (5.0 μM Mn(VII) and 40.0 μM CaSO₃). Simultaneously, algal organic matters (AOM) and microcystins were effectively controlled due to the oxidative degradation of Mn(VII)/CaSO₃ and the formation of denser flocs owing to the in-situ MnO₂ generation. In addition, it demonstrated that the addition of CaSO₃ broadened the pH range for Mn(VII) application and reduced the Mn residue. Subsequent experiments conducted in this study, such as electron spin resonance, methyl phenyl sulfoxide probe and free radical quenching experiments, demonstrated that Mn(III) may be the key active substance of the Mn(VII)/CaSO₃ system enhancing coagulation for algal removal. Active radicals (SO₄•^- and •OH) in this system also played a relatively minor role. In conclusion, this study highlights the potential of the Mn(VII)/CaSO₃ process as an environmentally friendly adjunct technology for algal removal and AOM control.
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6. 题目: Unique characteristics and spatiotemporal variations of dissolved organic matter along the Yeongsan River estuary impacted by an estuary dam

文章编号: N24121109
期刊: Estuarine, Coastal and Shelf Science
作者: Meilian Chen, Suhyeon Jang, Kyung-Hoon Shin, Haeseong Oh, Min-Seob Kim, Jin Hur
更新时间: 2024-12-11
摘要: Artificial barriers such as dams and weirs profoundly affect the hydrological conditions of aquatic ecosystems and organic carbon dynamics. This study examines the sources, characteristics, and spatial and seasonal variations in dissolved organic matter (DOM) in the Yeongsan River estuary, South Korea, impacted by an estuary dam. We explore how these barriers influence DOM concentrations and compositions seasonally. Observations from five sites (YR1 to YR5) revealed high levels of fluorescence index (FI, 1.7–1.9), biopolymer fraction (2–16%), and percentage of dissolved organic sulfur (DOS%, up to 42%), indicating a dominant algal contribution. The dam's installation disrupted the DOM continuum, distinguishing between upstream sites with terrestrial DOM and downstream sites influenced by marine sources. Compared to downstream sites, upstream sites consistently showed higher dissolved organic carbon (DOC) and absorption at 254 nm (a254), with depleted δ¹³C-DOC across all seasons. Seasonal differences included higher concentrations of humic substances and biopolymers in upstream sites during spring, with pronounced protein-like fluorescence. During the monsoon, these sites had enhanced humic substances, biopolymers, low molecular weight neutrals, and peak N fluorescence associated with chlorophyll intensity. The dam controlled freshwater discharge to downstream sites, especially during peak monsoon. Stable isotopic values (δ¹³C-DOC) confirmed distinct DOM sources between upstream and downstream sites. Notably, only the middle site (YR3) displayed unique characteristics in the pre-monsoon season, indicating the monsoon's residual impact on DOM. The lower estuary likely experiences extended water residence times post-monsoon. This study underscores the significant influence of phytoplankton blooms and distinct spatiotemporal variations in DOM characteristics in an estuarine system disrupted by artificial barriers.
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7. 题目: New insights into extracellular polymeric substance degradation during dewaterability of sludge by UV-driven advanced reduction processes: Role of hydrated electron and spectroscopic profiling of dissolved organic components in sludge filtrate.

文章编号: N24121108
期刊: Journal of Environmental Management
作者: K M Priyanka, M P Saravanakumar
更新时间: 2024-12-11
摘要: Currently, Advanced Reduction Process (ARP) is gaining popularity as an alternative to Advanced Oxidation Process (AOP). Though UV/Sulfite process is effective in degrading organic compounds, no investigation has been done using ARP to improve sludge dewaterability. Here, effect of two different ARP's (UV/Sulfite; UV/Sulfide) that generates hydrated electron (eaq-) and hydrogen atom (H•) in enhancing sludge dewatering was explored. Based on findings, alkaline pH was favourable for ARP's to improve sludge dewatering. At optimal conditions, CST value was 18 and 23.3 s for UV/Sulfite and UV/Sulfide with raw sludge exhibiting 100 s at pH-7.7 respectively. The mechanism revealed that eaq- was the dominant reducing radical along with H•, based on EPR spectra and quenching experiments. UV-Vis, Gaussian fitting, 3D EEM Fluorescence and Synchronous Fluorescence Spectroscopy exhibited higher release of organic matter and aromaticity which agrees with FTIR analysis. Emission peak around 330-380 nm in all samples exhibited Microbial Soluble Products and aromatic protein II.
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8. 题目: Simultaneous removal of organic matter and inorganic nitrogen in Baijiu wastewater by methanotrophic denitrification

文章编号: N24121107
期刊: Bioresource Technology
作者: Zhaohan Chu, Xin Tang, Yancheng Li, Jiang Li, Wei Xiong, Yaohua Yin, Xinglin Pan
更新时间: 2024-12-11
摘要: Methanotroph could facilitate nitrogen removal during methane oxidation, and promote conversion of organic compounds by producing methane monooxygenase. Co-metabolic effect and mechanism of aerobic methane oxidation on the removal of nitrogen and organic matter from Baijiu wastewater were investigated using an improved denitrifying biological filter. It was found that the average removal efficiency of chemical oxygen demand (COD), total nitrogen (TN) and chroma increased by 17 %, 22 % and 10 % in reactor B with methane compared to reactor A with air only. Three-dimensional fluorescence spectroscopy and Fourier transform infrared spectroscopy analysis revealed that methanotroph co-metabolism was accompanied by eliminating nitrogen and organic matter as well as forming alcohol compounds. Metagenomic analyses revealed that Methylocaldum, the dominant genera in Reactor B, exerted a pivotal role in removing nitrogen and organic matter removal by supplying energy and catalysis. Functional genes pmoABC-amoABC could facilitate nitrogen and organic matter removal.
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9. 题目: Investigating enhancement of protease and lysozyme combination pretreatment on hydrolysis of sludge organics under humic acid inhibition

文章编号: N24121106
期刊: Bioresource Technology
作者: Xiang Zou, Junguo He, Xinlei Pan, Qiupeng Cai, Shengye Duan, Yijie Zhong, Xinxin Cui, Jie Zhang
更新时间: 2024-12-11
摘要: This study investigated the impact of humic acid (HA) on enzymatic pretreatment efficiency, focusing on sludge properties and HA molecular structure. The results showed that enzymatic pretreatment alleviates HA inhibition, improving hydrolysis efficiency. In the presence of HA, soluble proteins and polysaccharides in the enzyme-cocktail group reached 27.7 mg/L and 23.9 mg/L, 1.4 and 1.3 times higher than the blank group, respectively. The enzyme-cocktail group also had the highest soluble DNA concentration (19.4 mg/L) and the lowest viable cell proportion (69.3 %), indicating effective cell lysis. Enzyme-cocktail pretreatment reduced electrostatic repulsion, enhancing the mobility of extracellular organics. Enzyme interactions with HA released internal hydrolases and decreased amide groups on the HA surface, increasing the availability of biodegradable substrates. Overall, enzymatic pretreatment proves effective in mitigating HA-induced inhibition, thereby improving sludge biodegradation and enhancing carbon recovery in anaerobic fermentation.
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10. 题目: Overlooked impacts of manganese oxides in biochar sustainable stability: Coupled redox performance and aging mechanisms

文章编号: N24121105
期刊: Journal of Environmental Chemical Engineering
作者: Yinghui Guo, Ruyun Wang, Haoyan Wang, Yuan Li, Chunyang Hu, Kuangpeng Yan, Qinghua Chen, Chengzhi Zhou, Dong Ma
更新时间: 2024-12-11
摘要: Biochar has been widely recognized as an effective method for carbon fixation and sequestration by biomass thermal conversion. Large amounts of biochar entered soil, sediment, and water environment, but its long-term stability remains controversial. Herein, the impact of active manganese oxide minerals on biochar aging and decomposition was investigated. It was found that δ-MnO₂ mineral showed a significant influence on the stability of corn stalk biochar. The δ-MnO₂ would adsorbed on biochar surfaces due to the opposite charges, resulting in accelerated aging of the biochar. The aging process of biochar induced by δ-MnO₂ would begin with the oxidation of biochar surface functional groups and followed by the particle division and organic matters releasing. δ-MnO₂ itself was reduced by biochar, then recovered by molecular oxygen and thus continuously aging biochar in cycles. Under ambient pH conditions (5.0 - 8.0), high pH favored biochar aging, but the aging process became slow at low pH. This study revealed an environmental process of accelerating aging of biochar via active manganese minerals, which might usually be neglected for a long time. Therefore, it is important to reveal the interaction between biochar and active minerals in the environment and understand the effect of active minerals on aging process and stability of biochar.
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11. 题目: Soil Organic Carbon Increases With Decreasing Microbial Carbon Use Efficiency During Vegetation Restoration

文章编号: N24121104
期刊: Global Change Biology
作者: Jingwei Shi, Lei Deng, Jianzhao Wu, Edith Bai, Ji Chen, Zhouping Shangguan, Yakov Kuzyakov
更新时间: 2024-12-11
摘要: Microbial carbon (C) use efficiency (CUE) describes the proportion of organic C used by microorganisms for anabolic processes, which increases with soil organic C (SOC) content on a global scale. However, it is unclear whether a similar relationship exists during natural vegetation restoration in terrestrial ecosystems. Here, we investigated the patterns of CUE along a 160-year vegetation restoration chronosequence (from farmland to climax forest) estimated by stoichiometric modeling; additionally, we examined the relationship between CUE and SOC content and combined these results with a meta-analysis. The combination indicated that vegetation restoration decreased CUE from 0.35 to 0.28. Surprisingly, SOC content increased with decreasing CUE during vegetation restoration because forest soils have low pH values and high microbial phosphorus limitations compared to early ecosystems, implying that climax forests may not sequester as much soil C as expected. The shift in soil pH was the most important predictor of CUE compared to climate, plant, and microbial factors. CUE changes were directly induced by soil pH and not by the pH-induced microbial community. Alkaline soil acidification tended to decrease CUE. This first large-scale estimate of the relationship between CUE and SOC during natural restoration highlights the need to strengthen C sink management in mature forests to sustain their C sequestration potential.
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12. 题目: Influence of in situ biochar capping on microbial dynamics and ammonia nitrogen release in sediment

文章编号: N24121103
期刊: Journal of Environmental Management
作者: Yu Zhao, Yaoyao Zhu, Jianyin Huang, Zhixin Song, Wenzhong Tang
更新时间: 2024-12-11
摘要: To study the influence of in situ biochar (BC) capping technique on the release of ammonia nitrogen (NH4⁺-N) from sediments, a field mesocosm experiment was conducted in Baiyangdian Lake (BYDL), a critical water body often referred to as the kidney of North China where sediment pollution poses a significant threat to water quality. This study also assessed the impact of BC on sediment microorganisms. The results showed that the NH4⁺-N concentration in the overlying water of the BC-treated mesocosms was the lowest among four treatments, decreasing to 0.051 mg L⁻¹ by the 60th day. More importantly, the BC treatment showed the least increase in NH4⁺-N concentrations in sediments compared to other treatments. For sediments capped with a 4 cm layer of BC, the potential release flux of NH4⁺-N was reduced from 1.84 mg m⁻² d⁻¹ to −0.76 mg m⁻² d⁻¹. This reduction is likely due to the negatively charged surfaces of biochar, which enhance NH4⁺-N adsorption through electrostatic interactions. Additionally, BC modified the physical and chemical properties of the surface sediment, improving pH and increasing both organic content and the carbon/nitrogen (C/N) ratio. These changes influenced the microbial community structure within the sediments, enhancing NH4⁺-N removal. After 60 days, a significant alteration in the microbial community was observed in the BC-treated surface sediments. The addition of BC significantly increased the abundance of Proteobacteria and Firmicutes of the phyla in the sediments. Furthermore, BC enhanced the expression of functional genes including amoA, amoB, nirK, nirS, hzsB, nrfA and ureC, which are likely the primary microbial mechanisms promoting NH4⁺-N conversion in sediments for final removal.
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13. 题目: H2O2 generation for water purification induced by trace peroxymonosulfate on surface of Ca-C biochar converted from pigeon manure

文章编号: N24121102
期刊: Journal of Environmental Chemical Engineering
作者: Jiemei Liu, Wenrui Cao, Shaoqian Liu, Yingtao Sun, Lishen Mao, Xi Chen, Yanfen Fang, Chun Hu, Lai Lyu
更新时间: 2024-12-11
摘要: The high-value utilization of waste and low-energy elimination of pollutants are long-standing global challenges in the environmental field. Here, we adopt a strategy to solve these two problems synchronously by resourcefully converting pigeon manure waste into a dual-reaction-center (DRC) catalyst for water purification induced by trace peroxymonosulfate (PMS). It is found that the formation of the electron-poor/rich reaction centers and uneven electron distribution on the catalyst surface can facilitate the electron transfer during the reaction. Thus, the removal rates of the typical emerging contaminants (ECs) reached 100 % in only 30 s, accompanied by high stability and adaptability. An innovative discovery is that dissolved oxygen (DO) can be reduced to H₂O₂ by the utilization of pollutant electrons through the interfacial reaction process induced by trace PMS (0.1 mM). The generated H₂O₂ is further involved in the reaction to enhance the removal efficiency of pollutants. This work provides an alternative solution for the simultaneous utilization of waste resources and efficient removal of ECs.
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14. 题目: Green synthesized nanoscale zero-valent iron impregnated tea residue biochar efficiently captures metal(loid)s for sustainable water remediation

文章编号: N24121101
期刊: Journal of Environmental Management
作者: Jie Wang, Junhao Huang, Jun Meng, Genxing Pan, Yong Li, Zhangtao Li, Yong Sik Ok
更新时间: 2024-12-11
摘要: Pristine or modified nanoscale zero-valent iron (nZVI) synthesized though conventional chemical reduction have been widely recommended for remediating metal(loid)-contaminated water. However, their eco-friendliness is often challenged with the concomitant bio-toxicity and secondary environmental risks. Alternatively, this study utilized waste tea leaves extract and remaining residue as the reducing agent and pyrolytic matrix to innovatively fabricate a green synthesized nZVI impregnated tea residue biochar (G-nZVI/TB). Since the performances, mechanisms, and potential applications of G-nZVI/TB for simultaneous removal of metal cation and metalloid anion remain unclear, typical synthetic aqueous solutions and real wastewaters were systematically tested. The adsorption isotherms showed that the calculated maximum adsorption capacities of G-nZVI/TB for various meta(loid)s were 1.4–10.7 fold higher than those of TB. Although Cd(II) competed with Pb(II) for adsorption on G-nZVI/TB, they synergistically promoted As(III) sequestration. The SEM and FTIR spectra demonstrated that G-nZVI nanoparticles were uniformly dispersed onto TB framework, whereas newly grafted groups like Fe-O, C=O, and C-N accelerated metal(loid)s bonding. The results of batch experiments, XRD, and XPS comprehensively elucidated that metal(loid)s were predominantly separated from polynary systems via electrostatic adsorption, ion exchange, co-precipitation, cation-π interaction, oxidation-complexation, and B-type ternary complexation. In synthetic industrial wastewater and real paddy field drainage with divergent environmental conditions, 0.5 g L⁻¹ optimized G-nZVI/TB efficiently captured over 92.4% metal(loid)s at their concentrations ranging from 0.04 to 3 mg L⁻¹, indicating its excellent selective adsorption effectiveness and extensive compatibility for practical application in reusing multi-metal(loid)s contaminated wastewater. Overall, these findings provide new insights into developing green nano-functional materials for sustainable water purification.
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