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Simultaneous Hydrogen Production from Wastewater Degradation by Protonated Porous G-C3n4/Bivo4 Z-Scheme Composite Photocatalyst

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SSRN 2023年

作者： Yu, Chongfei Yang, Huiying Zhao, Huiyu Huang, Xin Liu, Mengna Du, Cuiwei Chen, Ruyan Feng, Jinglan Dong, Shuying Sun, Jianhui School of Environment Henan Normal University Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control Ministry of Education Henan Key Laboratory for Environmental Pollution Control Henan Xinxiang453007 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

Inspired by organic contaminants acting as sacrificial agents to accelerate the photocatalytic H2 evolution, protonated porous g-C3N4/BiVO4 Z-scheme photocatalysts was prepared through a simple one-step hydrothermal method for the degradation of ofloxacin (OFL) wastewater and simultaneous hydrogen production. The optimal g-C3N4/BiVO4 (HCN/BV-5) sample degraded the OFL wastewater with a hydrogen yield of 80.7 μmol∙g-1∙h-1, demonstrating the potential in protonated porous g-C3N4/BiVO4 Z-scheme photocatalyst synchronous photocatalytic degradation antibiotic wastewater and hydrogen production. By carrying out the free radical quenching experiments and electron spin resonance experiments, it proves that the ·OH and h+ radicals play the most positive roles in the simultaneous OFL antibiotic wastewater degradation and hydrogen production process. Meanwhile, the HCN/BV-5 also exhibited a significantly H2 evolution performance in different real-world water bodies and universal applicability to the degradation of antibiotics wastewater. This work presents a new idea for alleviating current energy crisis and addressing environmental problems. © 2023, The Authors. All rights reserved.

关键词： Hydrogen production

Environmental and Economic Assessment of the Construction and Operation of a Decentralized Composting Facility

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SSRN 2023年

作者： Nanlin, Liao Fan, Lü Hua, Zhang Liming, Shao Pinjing, He Institute of Waste Treatment and Reclamation Tongji University 1239 Siping Road Shanghai200092 China State Key Laboratory of Pollution Control and Source Reuse Tongji University 1239 Siping Road Shanghai200092 China

Decentralized waste treatment facilities are recently highlighted for the treatment of solid waste in rural areas for being cheap, flexible, and reliable. Among them, decentralized composting is most commonly used. Many forms of decentralized composting facilities also develop and apply in developing countries, but the environmental and economical performances remain unknown. Therefore, this study analyzed the environmental impacts and cost of a decentralized composting facility through life cycle assessment and life cycle cost for the whole life from construction, operation to demolition. Contribution and sensitivity analysis were also performed to find out the most influential processes and parameters. The facility had a 10-year designed life span and could treat about 5840 tonnes organic waste in its life cycle. The life cycle environmental impacts were 646700 kg CO2-eq, 8980 kg SO2-eq, -28 kg P-eq, 7.09×10-3 CTUh, 0.13 CTUh, and 16754 kg oil-eq for climate change, terrestrial acidification, freshwater eutrophication, human toxicity cancer effects, human toxicity non-cancer effects, and fossil resources scarce, respectively. The life cycle cost was 1080.925 k CNY. When scaling to treating 1 tonne organic waste, the environmental impacts were close to those of similar decentralized and centralized composting facilities and the cost was lower than those of centralized biological treatment plants when excluding revenues from compost. According to the contribution and sensitivity analysis, the operation stage had the largest environmental impacts. The composting and compost substitution processes in operation stage were the most sensitive processes. This study proved quantitatively that the decentralized facility was feasible both environmentally and economically and enriched the study cases for decentralized composting facilities. © 2023, The Authors. All rights reserved.

关键词： Composting

Prediction of free radical reactions toward organic pollutants with easily accessible molecular descriptors

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Chemosphere 2024年 346卷 140660页

作者： Zhang, Guoyang Zhu, Qiang Zheng, Hongcen Zhang, Shujuan Ma, Jing State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Key Laboratory of Mesoscopic Chemistry of Ministry of Education Institute of Theoretical and Computational Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China

Machine learning (ML) is becoming an efficient tool for predicting the fate of aquatic contaminants owing to the preponderance of big data. However, whether ML can "learn" the differences in reactivity among different free radicals has not yet been tested. In this work, the effectiveness of combining ML algorithms with molecular fingerprints to predict the reactivity of three free radicals was evaluated. First, a dataset containing 211 organic pollutants and their respective rate constants with the carbonate radical (CO3•−) was used to develop predictive models using both linear regression and ML methods. The use of topological atomic alignment information, in the form of the molecular access system (MACCS) and Morgan Fingerprint, and the electronic structure features (energy levels of the lowest unoccupied and highest occupied molecular orbitals, ELUMO and EHOMO, and the energy gap between ELUMO and EHOMO) gave satisfactory predictive performances (ML model with Random Forest algorithm with MACCS: RMSEtest = 0.787;linear regression model with energy levels: RMSEtest = 0.641). Additionally, the model interpretation correctly described that the key reactivity features for CO3•− were relatively close to those for SO4•− rather than those for •OH. These results suggest that combination of ML algorithms with easily accessible molecular fingerprints would be a powerful tool to accurately predict the radical reactions towards organic compounds. © 2023

关键词： Forecasting

Pervasive influence of heavy metals on metabolic pathways is potentially relieved by hesperidin to enhance the phytoremediation efficiency of Bassia scoparia

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Environmental Science and pollution Research 2024年第23期31卷 34526-34549页

作者： Hussain, Mazhar Hafeez, Arslan Rizwan, Muhammad Rasheed, Rizwan Seleiman, Mahmoud F. Ashraf, Muhammad Arslan Ali, Shafaqat Farooq, Umer Nafees, Muhammad Department of Botany Government College University Faisalabad Faisalabad38000 Pakistan Department of Environmental Sciences Government College University Faisalabad Faisalabad38000 Pakistan Department of Plant Production College of Food and Agriculture Sciences King Saud University P.O. Box 2460 Riyadh11451 Saudi Arabia Department of Biological Sciences and Technology China Medical University Taichung40402 Taiwan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing21023 China

Hesperidin (HSP), a flavonoid, is a potent antioxidant, metal chelator, mediator of signaling pathways, and regulator of metal uptake in plants. The study examined the ameliorative effects of HSP (100 μM) on Bassia scoparia grown under excessive levels of heavy metals (zinc (500 mg kg−1), copper (400 mg kg−1), cadmium (100 mg kg−1), and chromium (100 mg kg−1)). The study clarifies the underlying mechanisms by which HSP lessens metabolic mayhem to enhance metal stress tolerance and phytoremediation efficiency of Bassia scoparia. Plants manifested diminished growth because of a drop in chlorophyll content and nutrient acquisition, along with exacerbated deterioration of cellular membranes reflected in elevated reactive oxygen species (ROS) production, lipid peroxidation, and relative membrane permeability. Besides the colossal production of cytotoxic methylglyoxal, the activity of lipoxygenase was also higher in plants under metal toxicity. Conversely, hesperidin suppressed the production of cytotoxic ROS and methylglyoxal. Hesperidin improved oxidative defense that protected membrane integrity. Hesperidin caused a more significant accumulation of osmolytes, non-protein thiols, and phytochelatins, thereby rendering metal ions non-toxic. Hydrogen sulfide and nitric oxide endogenous levels were intricately maintained higher in plants treated with HSP. Hesperidin increased metal accumulation in Bassia scoparia and thereby had the potential to promote the reclamation of metal-contaminated soils. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Detoxification

Transformer-based enhanced model for accurate prediction and comprehensive analysis of hazardous waste generation in Shanghai: Implications for sustainable waste management strategies

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Chemosphere 2023年第1期338卷 139579页

作者： Shi, Wenjie Zhao, Youcai Li, Zongsheng Zhang, Wenxiao Zhou, Tao Lin, Kunsen The State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China Shanghai200092 China

The escalating generation of hazardous waste (HW) has become a pressing concern worldwide, straining waste management systems and posing significant health hazards. Addressing this challenge necessitates an accurate understanding of HW generation, which can be achieved through the application of advanced models. The Transformer model, known for its ability to capture complex nonlinear processes, proves invaluable in extracting essential features and making precise HW generation predictions. To enhance comprehension of the key factors influencing HW generation, visualization techniques such as SHapley Additive exPlanations (SHAP) provide insightful explanations. In this study, a novel approach combining classical deep learning algorithms with the Transformer model is proposed, yielding impressive results with an R2 value of 0.953 and an RMSE of 7.284 for HW prediction. Notably, among the five key fields considered—demographics, socio-economics, industrial production, environmental governance, and medical health—industrial production emerges as the primary contributor, accounting for over 50% of HW generation. Moreover, a high rate of industrial development is anticipated to further accelerate this process. © 2023 Elsevier Ltd

关键词： Forecasting

Adsorption of Highly Toxic Chlorophenylacetonitriles on Typical Microplastics in Aqueous Solutions: Kinetics, Isotherm, Impact Factors and Mechanism

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SSRN 2023年

作者： Yang, Mansu Zhang, Di Chu, Wenhai State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Microplastics (MPs) widely exist in all kinds of water bodies. The unique physical and chemical properties of MPs make them easy to become the carrier of organic pollutants, but the interaction between disinfection by-products (DBPs) and MPs has not been studied yet. In this study, the occurrence of emerging high-toxic chlorophenylacetonitriles (CPANs) in actual WWTP effluents was determined for the first time, and it was found that CPANs ubiquitously existed in WWTP effluents, and the concentration ranged from 88.01 ± 5.36 ng/L to 219.00 ± 16.44 ng/L. Then, the typical MPs (i.e., polyethylene (PE), polyethylene terephthalate (PET) and polystyrene (PS)) in WWTP effluents were selected to study their adsorption behavior of CPANs. Through adsorption kinetics and isotherm experiments, we found that the adsorption capacity of the three MPs followed the following order: PS > PET > PE. After that, through the determination of the specific surface area, contact angle, FTIR spectrum, crystallinity and glass transition temperature (Tg) of MPs, and the analysis of the properties of CPANs, the related mechanism was clarified as follows: the adsorption of CPANs on PE and PET was mainly influenced by hydrophobic interaction, pore-filling and Van der Waals force, and PS had the highest adsorption capacity due to the existence of π-π interaction. Finally, the effects of pH and dissolved organic matter on adsorption behavior were studied, and their effects were relatively limited. The results indicated that MPs may adsorb CPANs in actual WWTP effluents, and special attention should be paid to the possible impacts on the aquatic environment caused by the transfer of CPANs on MPs. © 2023, The Authors. All rights reserved.

关键词： Adsorption

Pyrrhotite-Sulfur-Limestone Composite for High Rate Nitrogen and Phosphorus Removal from Wastewater: Column Study

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SSRN 2023年

作者： Yang, Yinuo Huang, Gaopan Chen, Changxin Li, Ruihua State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 163# Xianlin Avenue Nanjing210023 China

Pyrrhotite-sulfur-limestone composite (PSLC) was prepared and PSLC autotrophic denitrification biofilter (PSLCAD) was constructed with PSLC particle (2-4.75mm) in this study. During treating synthetic, municipal and industrial secondary effluent, PSLCAD showed good NO3-N and PO43-P removal, and the highest NO3-N removal rate of PSLCAD was up to 1749.91mg/L/d. At HRT 0.5 h, and influent NO3-N 21.09 mg/L, NO3-N removal rate was up to 1005.12 mg/L with effluent NO3-N 0.32 mg/L. PSLCAD achieved effluent PO43-P below 0.2 mg/L when influent PO43-P was around 0.5 mg/L. HRT down to 0.5 h had no negative impacts on N removal. Effluent pH below 7 was harmful to denitrification performance of PSLCAD. NO3-N removal rate increased with influent NO3-N increasing, but too high influent NO3-N decreased NO3-N removal rate. In PSLCAD biofilter, the most dominant bacteria were Thiobacillus and Sulfurimonas, and they played the most important role in denitrification, but the abundance of heterotrophic denitrifiers was also quite high. PO43- was mainly removed through FePO4 in PSLCAD. The synergistic effects between pyrrhotite and sulfur autotrophic denitrification were much enhanced, and that caused PSLCAD to achieve high rate N and P removal. © 2023, The Authors. All rights reserved.

关键词： Limestone

A Heterogeneous Quasi‑solid‑state Hybrid Electrolyte Constructed from Electrospun Nanofibers Enables Robust Electrode/Electrolyte Interfaces for Stable Lithium Metal Batteries

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Advanced Fiber Materials 2024年第3期6卷 727-738页

作者： Manxi Wang Shiwen Lv Manxian Li Xuan Li Chuanping Li Zulin Li Xiaochuan Chen Junxiong Wu Xiaoyan Li Yuming Chen Qinghua Chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhou 350000China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350000China

Quasi-solid-state electrolytes that possess high ionic conductivity,excellent interface stability,and low interfacial resistance,are required for practical solid-state ***,a heterogeneous quasi-solid-state hybrid electrolyte(QSHE)with a robust lithium-ion transport layer composed of Li_(1+x)Al_(x)Ti_(2−x)(PO_(4))_(3)(LATP)nanoparticles(NPs)at the anode/electrolyte interface was fabricated using electrospun nanofibers as a skeleton via a facile in situ polymerization *** QSHE exhibits a high ionic conductivity(0.98 mS cm^(−1)),a wide electrochemical window(4.76 V ***/Li^(+)),and favorable compatibility with lithium metal(maintaining stability over 2000 h in a symmetrical cell)at room *** coupled with a Li|LiFePO_(4)battery,the QSHE enables the battery to retain 95.4%of its capacity after 300 cycles at 2 ***,the atomic force microscopy verifies the high Young’s modulus of the LATP-dominated bottom layer,while numerical simulation validates the effective distribution of lithium ions at the interface facilitated by LATP NPs,hence contributing to dendrite-free lithium plating/stripping *** straightforward strategy could pave the way for the development of high-performance and interfacially stable lithium metal batteries.

关键词： In situ polymerization Quasi-solid-state electrolytes Interface compatibility Lithium dendrites

Photochemical behavior of dissolved organic matter in environmental surface waters:A review

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Eco-Environment & Health 2024年第4期3卷 529-542页

作者： Yichen Xu Yutong Zhang Longlong Qiu Ming Zhang Jiaojiao Yang Rong Ji Davide Vione Zhanghao Chen Cheng Gu State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing UniversityNanjing 2023China Department of Environmental Engineering College of Biology and the EnvironmentNanjing Foresty UniversityNanjing 210037China Quanzhou Institute for Environmental Protection Industry Nanjing UniversityQuanzhou 362000China Department of Chemisty University of TurinVia Pietro Giuria 510125TorinoItal

As an important group of widespread organic substances in aquatic ecosystems,dissolved organic matter(DOM)plays an essential role in carbon recycling and transformation *** photochemical behavior of DOM is one of the main ways it participates in these processes,and it attracts extensive ***,due to a variety of sources and water conditions,including both freshwater and seawater environments,the photochemical properties of DOM exhibit great ***,a large number of studies have focused on the generation process of reactive species(RS)from sunlit DOM,while lttle effort has been made so far to provide a comprehensive summary of the photochemical behavior of DOM,especially in fresh and saline aquatic *** this review,we analyzed the research hotspot on DOM photochemistry over the last 30 years,summarizing the generation of photoreactive species in natural water environments containing DOM(both freshwater and seawater)and listing the main factors affecting the rate,yield,and species of RS *** with freshwater,seawater has unique characteristics such as high pH value,high ionic strength,and halide ions,which affect the photogeneration of Rs,the photoconversion process,as well as the reaction pathways of various environmental *** general,DOM-induced surface water photochemistry has important impacts on the environmental transformation and toxic effects of aquatic pollutants and can even contribute significantly to the Earth's carbon cycle,which would have potential implications for both human and ecological health.

关键词： Dissolved organic matter Photochemistry Reactive species Surface waters Ecological impact