24年11月25日文献情报（11篇）

24年11月25日文献情报

1. 题目: Low-cost Ca/Mg co-modified biochar for effective phosphorus recovery: Adsorption mechanisms, resourceful utilization, and life cycle assessment

文章编号: N24112511
期刊: Chemical Engineering Journal
作者: Ming Chen, Yifan Liu, Junchao Pan, Yuling Jiang, Xueyan Zou, Yangyang Wang
更新时间: 2024-11-25
摘要: Effective recovery of phosphorus from wastewater and reutilization are important for controlling water eutrophication and achieving resourceful utilization of pollutants. In this study, a low-cost, eco-friendly, and highly efficient Ca/Mg co-modified coffee grounds biochar (CMBC) was synthesized in one step for phosphorus adsorption, and the potential application of the phosphorus absorbed CMBC (CMBC-P) as a fertilizer was also explored. The results showed that the surface of CMBC was covered by granular calcium/magnesium oxides with a rougher layered stacking structure. The adsorption capacity of CMBC for phosphorus has been significantly improved compared with that Ca or Mg modification, with the maximum adsorption capacity reached 144.31 mg/g. The mechanisms primarily involve surface precipitation, complexation, ligand exchange, and electrostatic attraction. Density functional theory calculation revealed that the Ca-based active sites were the main binding sites (−6.58 and −6.41 Kcal/mol) for phosphorus compared with that of the Mg (−0.89 Kcal/mol). Natural aging experiment showed that approximately 74.87 % of the adsorbed phosphorus can be released to soil within 60 days and the soil available phosphorus also increased significantly. The CMBC-P also significantly enhanced the germination and growth of plants. Moreover, life cycle assessment revealed that the production of CMBC emitted only 8.38 kg CO₂ eq, and a more environmentally friendly approach was also proposed. Cost benefit analysis confirmed the exceptional cost-effectiveness (15.15 g P/$) of CMBC among various adsorbents. Overall, CMBC demonstrated excellent potential for removal phosphorus from water and further use as a phosphorus fertilizer.
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2. 题目: Effect of inorganic component of biochar on lead adsorption performance and the enhancement by MgO modification

文章编号: N24112510
期刊: Environmental Science and Pollution Research
作者: Stephen Johnson Khamis Yesto, Hongru Shang, Xiaohong Lv, James Taban Abdalla, Tengfei Wang, Yanling Yu
更新时间: 2024-11-25
摘要:

Biomass-derived biochar has enormous potential for sustainable and low-cost treatment of lead-contained wastewater. In this study, corncob and cow dung-derived biochar were prepared. The increase in pyrolysis temperature could improve the porous structures, surface area, functional groups and alkalinity, and further provide a higher Pb²⁺ capacity in both biochars. Cow dung biochar performed better than corncob for its higher inorganic mineral content and more alkaline surface. Among them, CDB-600 performed the Langmuir maximum capacity of 357.1 mg/g, with a high surface area of 144.3 m²/g; ion exchange and precipitate were the main adsorption mechanisms. After further MgO modification, the M-CDB displayed a high surface area of 166 m²/g, and ion exchangeability and precipitate-promoting effects were improved. M-CDB performed a Langmuir maximum capacity of 833.3 mg/g. The pHpzc was found to be 10 and the adsorbents portray a very good Pb²⁺ adsorption selectivity among coexisting ions in the solution. The adsorption process was found to be endothermic, feasible, spontaneous and chemisorption. The fixed lead on CDB-600 was stable in water. The immobilized lead could be desorbed by acid wash. CDB-600 performed better in terms of sustainability in use, which could support its continuous application ability.

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3. 题目: Efficient adsorption and mechanistic analysis of phosphorus in acid leaching solution of incinerated sewage sludge ash by zirconium-modified reed biochar

文章编号: N24112509
期刊: Separation and Purification Technology
作者: Qin Yuan, Yaoting Duan, Li Fan, Chunli Zheng, Ruijing Su, Nuo Liu, Jun Wu
更新时间: 2024-11-25
摘要: Resource recovery of phosphorus (P) from incinerated sewage sludge ash (ISSA) was achieved by wet chemical leaching and selective adsorption of biochar material. Sulfuric acid was used to extract P from ISSA to obtain a P-rich solution with a leaching rate of 96.56 %. Zirconium-modified reed biochar (Zr-RB) was prepared by impregnation method, which could efficiently and selectively recover P from acid leaching solution with high adsorption efficiency of more than 99 %. Three adsorption kinetic models and four adsorption isotherm models were fitted to the batch adsorption experimental data, and it was found that the quasi-second kinetic model and the Freundlich model as well as the Redlich-Peterson model could better describe the adsorption of P by Zr-RB. It showed that the adsorption of P by Zr-RB was an easily occurring adsorption process dominated by multilayer adsorption and nonuniform adsorption, supplemented by monolayer and uniform adsorption. Calculations of surface adsorption energy, molecular electrostatic potential and spin-polarized molecular orbitals based on material characterization and density functional theory (DFT) were carried out to explore the interaction mechanism of Zr-RB adsorption on P involving surface precipitation, pore filling and ligand exchange. In addition, Ca₅(PO₄)₃(OH) product with a P bioavailability rate of 80.17 % was generated from the recovered P. In conclusion, the effective recovery of P from ISSA and the use of Zr-RB as an efficient P adsorbent have broad application prospects.
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4. 题目: Biochar induced the decoupling of exciton dissociation and intersystem cross in BiOBr heterojunction for dual-channel boosted oxygen activation

文章编号: N24112508
期刊: Chemical Engineering Journal
作者: Tian Fu, Hanbing Zhang, Linxing Wang, Tao Zhang, Jing Sun, Kun Liu, Luo Guo, Pengfei Wang, Sihui Zhan
更新时间: 2024-11-25
摘要: Two-dimensional (2D) materials exhibit a strong propensity for exciton generation upon photoexcitation compared to bulk counterparts. However, as exciton relaxation processes, intersystem crossing (ISC) and exciton dissociation always compete in the carrier dynamics. This study presents a strategy to decouple exciton dissociation and ISC by introducing a nitrogen-doped biochar (NBC) as the ISC center to modify Z-scheme heterojunction (BiOBr/BiOIO₃, BB). NBC-BB achieved a 1.75 times interfacial driving force compared to BB and suppressed the exciton binding energy (E_b) from 107 meV to 85 meV. Moreover, due to the spontaneous incorporation of Br into NBC during the preparation process, the singlet and triplet energy level difference (ΔE_ST) was shortened by 0.079 eV to intensify ISC on NBC. The constructive collaboration of exciton dissociation and ISC guaranteed the generation of reactive oxygen species (ROS) with strong redox potential and selectivity, achieving efficient removal of refractory organic pollutants under visible light. The bolstered oxygen adsorption indicated effective oxygen activation capability of NBC-BB, leading to a 1.4-fold and 3.1-fold increase in the generation efficiency of ¹O₂ and •O₂⁻, respectively. This study also presented experiments on various influencing factors, cyclic stability, and a feasible continue-flow system, showcasing the stability and potential for the practical application.
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5. 题目: Addition of bacterial-feeding nematodes contributes to soil phosphorus availability by affecting the mineralization of moderately labile organic phosphorus

文章编号: N24112507
期刊: Applied Soil Ecology
作者: Jigao Wang, Kai Wei, Jialiang Tang, Chaoyan Yuan, Yanling Wang, Xiaoming Sun, Bo Zhu
更新时间: 2024-11-25
摘要: Improving the soil residual organic phosphorus (P) utilization rate is important for alleviating P resource shortages and reducing water pollution. Bacterial-feeding nematodes can impact soil alkaline phosphomonoesterase (AlP) activity and mediated organic P mineralization through affecting AlP-producing bacteria that harbor the phoD gene. However, it is unclear which organic P fraction mineralization is promoted with increasing AlP activity after bacterial-feeding nematodes are added, and whether this promotion effect varies with fertilization regimes. Microcosm experiments without (control; -Nematode) and with adding bacterial-feeding nematode Eucephalobus (+Nematode) were carried out in the present study to investigate impacts of bacterial-feeding nematodes on organic P mineralization by using soils collected from four fertilization regimes: non-fertilized control (CK), chemical nitrogen (N), P and potassium (K) fertilizers (NPK), crop straw plus chemical fertilizers (SNPK), pig manure plus chemical fertilizers (MNPK). After 30 days, +Nematode treatment significantly increased soil AlP activity under all the fertilization regimes, and also increased the richness index of AlP-producing bacteria as well as the relative abundances of the gram-positive (G+) bacteria Actinomycetia, Streptomyces and Amycolatopsis. Meanwhile, these three G+ bacteria showed a significant positive correlation with AlP activity, and contributed the most to the different AlP-producing bacterial community compositions under -Nematode treatment versus +Nematode treatment. Moreover, +Nematode treatment only significantly increased the labile organic P (NaHCO3-Po) content in CK and SNPK soils, and the moderately labile organic P (NaOH I-Po) content in SNPK soil. Correlation analysis showed that the AlP activity had positive relationships with the AlP-producing bacterial richness index, community composition and NaOH I-Po, water-soluble P (NH4Cl-Pi) contents. Partial least squares structural equation modeling (PLS-SEM) revealed that NaOH I-Po, under the direct influence of AlP, indirectly and positively influenced NH4Cl-Pi by affecting moderately labile inorganic P (NaOH I-Pi). Overall, this study increases our understanding of the effect mechanism of bacterial-feeding nematodes on organic P mineralization, and finds that the addition of bacterial-feeding nematodes under straw returning may have a better effect in improving the soil P availability compared with their addition under other fertilization regimes.
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6. 题目: Comparative study on the adsorption performance of CO2 and Hg in flue gas using corn straw and pine biochar modified by KOH

文章编号: N24112506
期刊: Separation and Purification Technology
作者: Tianle Zhang, Zhuo Xiong, Yongchun Zhao, Junying Zhang
更新时间: 2024-11-25
摘要: This study presents a comparative analysis of the adsorption performance of KOH-modified biochar derived from corn straw and pine for CO₂ and Hg capture from coal-fired flue gas. The results indicate that the increase in KOH-activation temperature could significantly enhance the specific surface area. Pine biochar (PACs) activated at 800 °C exhibited the highest CO₂ adsorption capacity, reaching 3.79 mmol/g at 25 °C. As well as, for corn straw biochar (CACs), the activation temperature of 700 °C is the optimal condition. The isosteric heat of adsorption for PACs and CACs is less than 40 kJ/mol and the R² of the pseudo-first-order kinetic model exceeds 0.9, demonstrating that the CO₂ adsorption of biochar mainly relies on physisorption. The main factor affecting the CO₂ adsorption performance is the micropore capacity (<10 Å). CO₂ capture positively correlates with carbon content and graphitization degree but negatively correlates with total pore volume and specific surface area. In addition, PACs and CACs present better CO₂ adsorption performance after 10 cycles. PAC-800 can achieve CO₂ desorption at lower temperatures and has higher selectivity for CO₂, compared with CAC-700. CO₂ can enhance the mercury removal efficiency of biochar to a certain extent. However, the maximum on-line mercury removal efficiency of both pine and corn straw biochar is less than 80 % under CO₂ capture conditions, indicating that it is necessary to improve Hg capture performance by constructing higher-affinity sites on the surface of the biochar.
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7. 题目: Insights into the photoaging behavior of biodegradable and nondegradable microplastics: spectroscopic and molecular characteristics of dissolved organic matter release

文章编号: N24112505
期刊: Journal of Hazardous Materials
作者: Xiaoyang Wu, Yifan Liu, Yaofeng Jin, Yue Wang, Mengjie Yuan, Kunyu He, Xiaoyan Zhang, Qin Chen, Zhijing Xue, Rui Wang, Xiaoyun Li
更新时间: 2024-11-25
摘要: Biodegradable plastics are increasingly used as a potential alternative to nondegradable plastics to tackle plastic pollution. However, recent studies have raised concerns about the ecological risks posed by biodegradable microplastics (MPs), which mainly focused on the risks generated by MPs themselves, neglecting the risks associated with the MPs derived dissolved organic matter (DOM). Therefore, this study selected polylactic acid (PLA) MPs with 50 μm particle size and polystyrene (PS) MPs with 50 μm and 500 nm particle sizes as representatives of biodegradable and nondegradable MPs, respectively, to comparative investigate their photoaging behavior, particularly the differences in DOM release. The results showed that both PLA-MPs and PS-MPs exhibited considerable photoaging under ultraviolet irradiation, accompanied by different color changes (PS turned yellow and PLA turned grayish brown), which were attributed to the different functional groups produced on their surfaces after photoaging (PS-MPs: C=O, PLA-MPs: terminal –COOH). Additionally, excitation-emission matrix characterization combined with parallel factor analysis revealed that 50 μm PLA-MPs (16%–23%) released more protein-like low molecular weight DOM during photoaging than that of both 50 μm PS-MPs (7%–13%) and 500 nm PS-MPs (8%–18%). Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS) further confirmed that PLA-MPs (41.4%) produced more unstable DOM easily utilized by microorganisms than that of 50 μm PS-MPs (6.3%) and 500 nm PS-MPs (7.9%). These results together suggested that biodegradable MPs with small particle size derived DOM may have a greater impact on microbial activity and carbon cycle than that of nondegradable MPs.
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8. 题目: Simultaneous elimination of sulfamethoxazole, antibiotic-resistant bacteria and resistance genes by MgFe2O4/MgO modified biochar activated peroxymonosulfate: Performance, mechanism and application potential

文章编号: N24112504
期刊: Chemical Engineering Journal
作者: Guanlu Wang, Zhenhua Sun, Yiyang Liu, Xi Chen, Changchun Yan, Xuejiang Wang
更新时间: 2024-11-25
摘要: The extensive utilization of antibiotics has resulted in an escalation of antibiotic resistance (AR), which represents a significant threat to human health. In this study, a MgFe₂O₄/MgO modified biochar (MMFBC) activated peroxymonosulfate oxidation system (MMFBC/PMS) was constructed to eliminate sulfamethoxazole (SMX), antibiotic-resistant bacteria (ARB), and antibiotic resistance genes (ARGs) simultaneously. Experimental results demonstrated that the oxidation system was capable of fully inactivating E. coli DH5α within 30 min, and the horizontal gene transfer (HGT) frequency of sulfonamides ARG (sul1) decreased to its lowest level within just 2 min ([MMFBC] = 0.4 g/L, [PMS] = 1.0 mM, initial E. coli DH5α concentration: ∼ 10⁸ CFU/mL). Meanwhile, the MMFBC/PMS could achieve synchronous removal of SMX within 30 min ([SMX] = 20 mg/L). Singlet oxygen (¹O₂) was the primary reactive oxygen species (ROS) involved in the disinfection process. From the perspective of time evolution, the mechanism underlying the simultaneous elimination of ARB and ARGs was analyzed. It was found that proteins were preferentially damaged, and the combined effects of intracellular ROS and cell rupture result in bacterial death. Subsequently, the leakage of cellular contents led to the degradation of ARGs by ¹O₂. Furthermore, the system was implemented to treat actual livestock wastewater to assess its potential application. The metagenomic analysis revealed that MMFBC/PMS treatment effectively achieved disinfection and led to a significant reduction in the relative abundance of the HGT-related functional genes and ARGs. Overall, this work provides a practical approach to controlling AR and offers new insights for improving disinfection efficiency.
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9. 题目: Spectral Fingerprints of DOM-Tungsten Interactions: Linking Molecular Binding to Conformational Changes

文章编号: N24112503
期刊: Journal of Hazardous Materials
作者: Weijun Li, Guobin Liu, Ming Lei, Yaoyu Zhou, Haojie Cui, Huihui Du
更新时间: 2024-11-25
摘要: Tungsten (W), a widely used yet understudied emerging contaminant, forms oxyanions in aqueous environments, distinguishing it from conventional heavy metals. While dissolved organic matter (DOM) demonstrates considerable potential for W binding, DOM-W interactions remain largely unexplored. Of particular significance, yet frequently overlooked, are the conformational changes in DOM during W binding processes. This study proposes a novel theoretical framework integrating superposition and charge transfer models to elucidate the complexity of these interactions. By combining spectroscopic techniques and photophysical models, we revealed that aromatic compounds containing 1–3 rings, especially monocyclic aromatic protein-like components, exhibit high affinity for W (logK=3.74–4.00). Phenolic hydroxyls served as primary binding sites for W, with aromatic rings facilitating binding through π interactions. Importantly, W binding to aromatic compounds induced conformational changes in DOM, transitioning from a loosely aggregated state to a more compact configuration. These changes facilitated W encapsulation within DOM through the synergistic effects of hydrophobic interactions, hydrogen/π-hydrogen bonding and π-stacking, potentially leading to stable trapping of W. Two-dimensional correlation spectroscopy analysis elucidated the sequential encapsulation process, involving phenolic, aromatic carboxylic/aliphatic carboxylic, polysaccharides, and aliphatics. The intricate behavior of DOM-W binding profoundly reshapes DOM's conformation, subtly yet significantly orchestrating W's binding affinity, environmental transport, and bioavailability in aquatic ecosystems.
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10. 题目: Fertilising properties of materials based on opoka and waste concrete after sorption of humic substances from raw reject water

文章编号: N24112502
期刊: Chemosphere
作者: Jolanta Turek-Szytow, Justyna Michalska, Agnieszka Dudło, Paweł Krzemiński, Anne Luise Ribeiro, Joanna Surmacz-Górska
更新时间: 2024-11-25
摘要: The treatment and reuse of wastewater in a strategic approach to mitigate water scarcity and its declining quality. Natural organic matter, particularly humic substances (HS) from decomposed plant and animal material, often determined the quality of treated wastewater. This study integrates HS recovery into conventional wastewater treatment, aligning with global trends towards carbon capture and storage. The efficacy of opoka (OP) and waste autoclaved aerated concrete (AAC) to sorb HS from the real reject water (RW) was evaluated. The analysis showed that fulvic acids comprised 89% of the organic matter in RW. OP and AAC demonstrated HS sorption capacities of 200 mg g⁻¹. The metal concentrations in the post-sorbents remained within the regulatory limits set for fertilizers by Polish and EU standards. The materials were further tested for phytoactivity in hydroponic systems at different doses (0.05–25 g L⁻¹).A more balanced ratio of ionic forms in the post-sorbents resulted in lower conductivity, improving their chemical stability and phytoactivity. Phytotoxicity studies indicated a that a concentration range of post-sorbents from 0.1 to 2.5 g L⁻¹ was optimal for promoting the growth of most of the tested plants.This research highlights the potential of using post-sorbents as fertilizers, advancing sustainability by recovering HS from RW and supporting a circular economy approach.
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11. 题目: Grassland Degradation-induced Soil Organic Carbon Loss Associated with Micro-food Web Simplification

文章编号: N24112501
期刊: Soil Biology and Biochemistry
作者: Yang Hu, Tianle Kou, Mengfei Cong, Yuanbin Jia, Han Yan, Xingyun Huang, Zailei Yang, Shaoshan An, Hongtao Jia
更新时间: 2024-11-25
摘要: Soil micro-food webs play a vital role in sustaining soil carbon cycling and stocks through the activities and interactions of individual organisms. However, grassland degradation disrupts these micro-food webs and is expected to reduce soil carbon stocks. This hypothesis was tested along degradation transects that were established in alpine meadows and steppes in arid regions, examining how multitrophic organisms and microbial metabolic efficiency respond to grassland degradation and how these responses relate to soil organic carbon (SOC). Grassland degradation reduced microbial necromass accumulation coefficient (the ratio of microbial necromass carbon to microbial biomass carbon) and increased microbial metabolic quotient (the ratio of soil respiration rate to microbial biomass carbon), indicating that microbes may prioritize SOC decomposition for resource acquisition over growth and necromass accumulation. Degradation led to increased bacterial and fungal diversity, reduced protist and nematode diversity, and simplified the structure of micro-food web (network complexity). Overall, grassland degradation reduced microbial metabolic efficiency, linked to reduced plant biomass, lower soil clay content, and a simplified micro-food web—particularly weakening interactions among microbes, microbivores, and predators—which is associated with SOC loss in degraded grasslands. These findings indicate the necessity of maintaining micro-food web structures to promote soil carbon sequestration in degraded grasslands.
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