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Rapid, stable, and highly-efficient development of salt-tolerant aerobic granular sludge by inoculating magnetite-assisted mycelial pellets

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Chemosphere 2023年第1期339卷 139645页

作者： Han, Xushen Tang, Rui Liu, Changshen Yue, Jingxue Jin, Yan Yu, Jianguo State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology 130 Meilong Road Shanghai200237 China National Engineering Research Center for Integrated Utilization of Salt Lake Resources East China University of Science and Technology 130 Meilong Road Shanghai200237 China

Long cultivation time hinders the industrial applications of aerobic granular sludge (AGS) in treatment of hypersaline wastewater. Mycelial pellets (MPs) have been used to efficiently strengthen the flocculent sludge aggregation and accelerate the formation of AGS. However, the MPs-based AGS was easily crushed or fragmented into several small pieces/granules that brought the uncertainty and extended the transition process to form mature AGS. In this study, magnetite was used to strengthen MPs (halotolerant fungus Cladosporium tenuissimum NCSL-XY8), and co-culture and adsorption type of magnetite-assisted mycelial pellets (CMMPs and AMMPs) were prepared and used for acceleration of salt-tolerant aerobic granular sludge (SAGS) cultivation under 3% salinity conditions. Compared to inoculating MPs, the inoculation of either CMMPs or AMMPs could stably transition to mature SAGS without evident fragmentation, which obviously increased the certainty and stability of SAGS formation. Also, highly-efficient simultaneous nitrogen and carbon removal (∼98% TOC and ∼80% TN removal) could be reached in 8 days. Typically, the granules maintained perfect characteristics (D50 > 1300 μm, D10 > 350 μm, SVI30 30/SVI5 = 1.0) during the whole cultivation/transition processes (Day 0–55) by using the inoculum of CMMPs. ITS rDNA sequencing revealed the inoculated fungus Cladosporium tenuissimum played key roles in the formation of SAGS. All the phenomena indicated the rapid, stable, and highly-efficient start-up of SAGS could be successfully realized by inoculating CMMPs. © 2023 Elsevier Ltd

关键词： Granulation

Self-Enhanced Oxidation of Fluoroquinolone Antibiotics by Cuii/Peroxymonosulfate: Copper Coordination Mechanism with Antibiotics

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SSRN 2024年

作者： Zhao, Qing Chen, Long Wang, Zhiqiang Zhou, Lei Gong, Xueqing Xiu, Guangli Shanghai Environmental Protection Key Laboratory for Environmental Standard and Risk Management of Chemical Pollutants School of Resources & Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes School of Resources & Environmental Engineering East China University of Science and Technology Shanghai200237 China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Centre for Computational Chemistry Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Trace copper ions are commonly found in different water bodies. They can effectively promote the degradation of various pollutants by peroxymonosulfate (PMS). However, the underlying mechanism of copper's action has not yet been clarified. Fluoroquinolone antibiotics (FQs), which are commonly used in humans and animals, often coexisting with copper metal in environmental waters, especially in aquaculture and medical wastewater. The presence of CuII under neutral conditions is found to significantly enhance the degradation efficiency of FQs by PMS. The coordination of CuII with FQs plays a crucial role in this process. Taking pefloxacin (PE), one typical FQs as an example, the structure of the copper complexes was determined using UV-visible spectroscopy, fluorescence spectroscopy, and DFT calculations as [Cu (PE) (H2O)4]2+. Comprehensive quenching experiments and electron paramagnetic resonance (EPR) test indicated that high-valence copper was responsible for the accelerated degradation. The combined results, including PMS decay and DFT calculations, indicated that CuII is initially reduced to CuI at a relatively slow rate and then rapidly oxidized to CuIII in the presence of PMS. The results highlight the valence transition of CuII/CuI/CuIII experienced during PMS activation, and the crucial role of contaminant-metal coordination in the valence transformation of copper. © 2024, The Authors. All rights reserved.

关键词： Copper compounds

Deterioration Modes, Mechanisms, and Effects of Landfill Facilities Disposing Hazardous Waste

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SSRN 2023年

作者： Qiu, Panpan Xu, Ya Yao, Guangyuan Liu, Yuqiang Dong, Lu Huang, Qifei State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control Beijing100012 China School of Information and Communication Engineering Beijing University of Technology Beijing100000 China

The knowledge gap on the major failure modes and mechanisms in landfills and their possible effects on the service life of landfills and their impact on the surrounding environment has limited the further development of research related to long-term environmental risk and life prediction of landfills. In this study, an FMMEA analysis was conducted to identify the major failure modes, mechanisms, and impacts that may occur in landfills under extreme harsh chemical and stress conditions. The results show that a total of 34 degradation factors and 34 potential failure modes were identified. The failure severity of the drainage media in the drainage system is high (Class III) and difficult to restore, while the failure severity of the HDPE geomembrane (GMB) in the liner system is extremely high (Class II) and occurs easily, but is hard to detect;thus, these are identified as the key units affecting HWLs life and are the focus of subsequent studies for its performance degradation and life prediction. The paper also points out that stress damage (physical damage) and oxidative aging are the degradation modes of the HDPE GMB under the HWL service environment due to their high probability of occurrence and serious deterioration consequences and is of great significance for guiding the long-term maintenance and management, monitoring, and early warning, as well as the risk management and control of HWLs. © 2023, The Authors. All rights reserved.

关键词： Deterioration

Self-Enhanced Oxidation of Fluoroquinolone Antibiotics by Cuii/Peroxymonosulfate: Copper Coordination Mechanism with Antibiotics

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SSRN 2024年

作者： Zhao, Qing Chen, Long Wang, Zhiqiang Gong, Xueqing Zhou, Lei Xiu, Guangli Shanghai Environmental Protection Key Laboratory for environmental standard and risk management of chemical pollutants School of Resources & Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes School of Resources & Environmental Engineering East China University of Science and Technology Shanghai200237 China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Centre for Computational Chemistry Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

关键词： Copper compounds

Enhanced removal of bisphenol A by cyclodextrin in photocatalytic systems:Degradation intermediates and toxicity evaluation

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Chinese chemical Letters 2020年第10期31卷 2623-2626页

作者： Yi Zhou Jie He Jian Lu Yongdi Liu Yanbo Zhou State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China National Engineering Laboratory for Industrial Wastewater Treatment East China University of Science and TechnologyShanghai 200237China

At present,the assessment of photooxidation system mainly focuses on the photodegradation efficie ncy of target pollutant,lacking of the toxicity assessment in the photocatalysis ***,photodecomposition of bisphenol A(BPA)was used to investigate the performance of several cyclodextrin modified ***,the comprehensive toxicity changes of BPA under different photocatalytic oxidation conditions were ***β-cyclodextrin(β-CD)modified photocatalyst,including titanium dioxide(CM-β-CD-TiO_(2)),carbon nitride(CM-β-CD-C_(3)N_(4))and cadmium sulfide(SH-β-CD-AM/CdS)exhibit high degradation rate and mineralization efficiency of *** highest total organic carbon(TOC)removal of BPA observed in the oxidation system of SH-β-CD-AM/CdS nano reactor(73.4%).The main oxidation intermediates in these systems were detected,and the comprehension toxicity of BPA and its oxidation intermediates in different system were compared by toxicity estimation software tool(T.E.S.T.)based on quantitative structure-activity relationship(QSAR)*** results show thatβ-CD can facilitate the photodecomposition of the target *** r,many oxidation intermediates with high compre hensive toxicity,eve n in the oxidation system with high B PA removal,can still be *** re,not only decomposition of target contaminant but also the comprehensive toxicity of oxidation intermediates should be regarded as index to evaluate a photocatalysis technology.

关键词： Cyclodextrin Bisphenol A Photocatalysis Toxicity Carbon nitride

Mechanisms of organic dissolution and toxic release in sludge during anaerobic hydrolysis enhanced by ultrasound-alkaline treatment

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Journal of Water process Engineering 2025年 74卷

作者： Chen, Xiurong Feng, Xiaomin Li, Renjie Song, Meijing Yin, Danning Li, Shuo Ma, Lijuan National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai 200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai 200237 China

The residual sludge is rich in organic matter, nitrogen, phosphorus, and other nutrients. However, due to its poor solubility, its bioavailability is limited, leading to low resource utilization efficiency. Anaerobic hydrolysis of sludge can dissolve cell-bound organic matter, enhancing the resource recovery potential of residual sludge. Under low-intensity ultrasound (60 W) and alkaline (pH = 9) pretreatment, anaerobic hydrolysis of sludge released substantial amounts of TOC, COD, TN, and TP. Hydroquinone, a representative phenolic compound, was selected as the target pollutant to acclimate activated sludge stepwise, simulating the residual sludge after industrial phenolic wastewater treatment. The study found that, compared to the control sludge hydrolysate (methanol-acclimated), the TOC content and organic toxicity of the toxic sludge hydrolysate (hydroquinone-acclimated) were significantly higher. The TOC concentrations in the toxic and control groups were 392.8 ± 19.65 mg/L and 264.44 ± 13.22 mg/L, respectively, with toxicity levels of 69.15 ± 3.46 % and 38.08 ± 1.9 %. By analyzing TOC changes, toxicity differences across molecular weight ranges, and 3D-EEMs spectra, it was found that the organic toxicity of sludge mainly originated from aromatic proteins in the 5-10 kDa range, particularly tryptophan and tyrosine. During anaerobic hydrolysis, dominant microbial communities decompose and utilize sludge organics through metabolic pathways such as amino acid biosynthesis, carbohydrate biosynthesis, glycolysis, respiration, the tricarboxylic acid (TCA) cycle, and amino acid metabolism. This process converts macromolecular substances in sludge into small molecules such as amino acids and monosaccharides, providing a novel strategy for the resource utilization of residual sludge. © 2025 Elsevier Ltd

关键词： Anaerobic hydrolysis High-throughput sequencing Organic toxicity Residual sludge Toxicity reduction

Is Biochar a Reliable Catalyst for Activating Persulfate? Damage of Biochar During Catalytic process

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SSRN 2022年

作者： Wan, Jiang Wang, Gehui Liang, Weiyu Peng, Cheng Zhang, Wei Fu, Rongbing State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resource and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Biochar has been believed as a low cost and metal-free catalysts for persulfate activation. However, the performance decreases of biochar after participating in the reaction, and the extent of damage to biochar remain poorly understood due to its intricate carbon structure. In this study, cotton stalk and walnut shell biochar were used to activate peroxydisulfate (PDS) for sulfadimidine degradation, and multiple characterization methods were used to determine the damage of biochar. The comparative experiments of biochar, recycled biochar, and PDS corroded biochar in catalytic reaction showed that the performance of biochars decreased by 37.5%-65.3%. After participating in the catalytic reaction, the unstable carbon in biochar was lost, and the surface of cotton stalk biochar was oxidized, which reduced its affinity to organic matter. CO2 physisorption showed that the pore structure of biochars barely changed. However, for walnut shell biochar, its adsorption capacity of nitrogen decreased obviously. Moreover, electrochemical tests showed that the conductivity of walnut shell biochar was reduced, which may lead to a decrease in the efficiency of the non-free radical pathway. Overall, the influences of catalytic process on biochar cannot be ignored, so more efforts are needed to make biochar an efficient and sustainable PDS activator. © 2022, The Authors. All rights reserved.

关键词： Pore structure

Is Biochar a Reliable Catalyst for Activating Persulfate? Damage of Biochar During Catalytic process

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SSRN 2022年

作者： Wan, Jiang Wang, Gehui Liang, Weiyu Peng, Cheng Zhang, Wei Fu, Rongbing State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resource and Environmental Engineering East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China

Biochar has been believed as a low cost and metal-free catalysts for persulfate activation. However, the performance decreases of biochar after participating in the reaction, and the extent of damage to biochar remain poorly understood due to its intricate carbon structure. In this study, the two biochars (cotton stalk and walnut shell biochar) were used to activate PDS for sulfadimidine degradation, and multiple characterization methods were used to determine the damage of biochar. The comparative experiments of biochar, recycled biochar and PDS corroded biochar in catalytic reaction showed that the performance of biochars decreased by 37.5%-65.3%. After participating in the catalytic reaction, the unstable carbon in biochar was lost, and the surface of cotton stalk biochar was oxidized, which reduced its affinity to organic matter. CO2 physisorption showed that the pore structure of biochars barely changed. However, for walnut shell biochar, its adsorption capacity of nitrogen decreased obviously. Moreover, electrochemical tests showed that the conductivity of walnut shell biochar was reduced, which may lead to a decrease in the efficiency of the non-free radical pathway. Overall, the influences of catalytic process on biochar cannot be ignored, so more efforts are needed to make biochar an efficient and sustainable PS activator. © 2022, The Authors. All rights reserved.

关键词： Pore structure

Synergistic Catalysis of Tungsten Disulfide and Manganese Ions for the Degradation of Dimethyl Disulfide Using Chlorine Dioxide

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SSRN 2023年

作者： Zhao, Tao Zhang, Pengkang Ma, Lijuan Wei, Shihao Qiu, Yangming Liu, Bangguo Chen, Xiurong National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resource and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China

Dimethyl disulfide (DMDS) is a familiar odorant found at chemical and pesticide sites, characterized by a low odor threshold and high volatility. In this study, a catalytic degradation system for DMDS using ClO2/Mn2+/WS2 was developed. The residual rate of DMDS decreased to 10.58% within 80 min under the following reaction conditions: 400 μM ClO2, 20 μM Mn2+, 80 μM WS2, and a pH of 7.0. XPS analysis confirmed the co-catalytic synergistic effect of WS2 and Mn2+. The metal valence cycling is the primary factor that enhances the activation of ClO2 for DMDS degradation. EPR tests and quenching experiments investigated the critical reactive oxygen species (ROS) in the reaction process, including 1O2, ·OH, and ClO2. In the initial 10 min of the fast reaction stage, 1O2 (44.48% reaction rate contribution) and ClO2 (55.52% reaction rate contribution) played the primary oxidation roles. ·OH (49.16% reaction rate contribution) and ClO2 (50.84% reaction rate contribution) became dominant during the slower reaction stage in the last 70 min. Further, density functional theory (DFT) calculations, in conjunction with GC-MS and ICS analyses, were used to predict potential degradation pathways of DMDS. This study presents a practical approach for efficiently removing DMDS in pesticide facilities and chemical industrial parks. © 2023, The Authors. All rights reserved.

关键词： Sulfur compounds