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Eco-friendly regeneration of end-of-life PVDF membrane with triethyl phosphate:Efficiency and mechanism

Chinese Chemical Letters 2024年第9期35卷 315-319页

作者： Lingna Wang Chenxin Tian Ruobin Dai Zhiwei Wang State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological SecuritySchool of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Membrane will inevitably reach the end of its lifespan due to the irrecoverable fouling accumulation in membrane bioreactors(MBRs)during long-term ***,we developed an eco-friendly membrane regeneration strategy with triethyl phosphate(TEP),which successfully prolonged the lifespan of end-of-life(EOL)polyvinylidene fluoride(PVDF)membranes in a large-scale *** regenerated(Rg)membrane exhibited a water permeance of 534.8±45.7 L m^(-2)h^(-1)bar-1,along with stable rejection rate,which was comparable with that of the new ***,compared to the membrane subjected solely to preliminary cleaning,the Rg membrane presented a more hydrophilic surface due to the combination of preliminary cleaning and solvent-based ***,the Rg membrane presented less fouling propensity with the critical flux of 15.2 L m^(-2)h^(-1),significantly higher than that of the EOL membrane(4.0 L m^(-2)h^(-1)).Importantly,the membrane regeneration strategy was capable of guaranteeing the effluent quality in MBR systems for treating real municipal *** study provides an eco-friendly membrane regeneration strategy for effectively removing the irrecoverable foulants,thereby promoting the advancement of sustainable membrane-based wastewater treatment technology.

关键词： End-of-life membrane regeneration Membrane bioreactor Preliminary cleaning Solvent-based processing Irrecoverable fouling removal

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An Integrated Analysis on the Synergistic Reduction of Carbon and pollution Emissions from China’s Iron and Steel Industry

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Engineering 2024年第9期40卷 111-121页

作者： Quanyin Tan Fei Liu Jinhui Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Decarbonization and decontamination of the iron and steel industry(ISI),which contributes up to 15%to anthropogenic CO_(2) emissions(or carbon emissions)and significant proportions of air and water pollutant emissions in China,are challenged by the huge demand for *** and pollutants often share common emission sources,indicating that emission reduction could be achieved ***,we explored the inherent potential of measures to adjust feedstock composition and technological structure and to control the size of the ISI to achieve carbon emission reduction(CER)and pollution emission reduction(PER).We investigated five typical pollutants in this study,namely,petroleum hydrocarbon pollutants and chemical oxygen demand in wastewater,particulate matter,SO_(2),and NO_(x) in off gases,and examined synergies between CER and PER by employing cross elasticity for the period between 2022 and *** results suggest that a reduction of 8.7%-11.7%in carbon emissions and 20%-31%in pollution emissions(except for particulate matter emissions)could be achieved by 2025 under a high steel scrap ratio(SSR)***,the SSR and electric arc furnace(EAF)ratio serve critical roles in enhancing synergies between CER and PER(which vary with the type of pollutant).However,subject to a limited volume of steel scrap,a focused increase in the EAF ratio with neglection of the available supply of steel scrap to EAF facilities would lead to an increase carbon and pollution *** CER can be achieved through SSR and EAF ratio optimization,only when the crude steel production growth rate remains below 2.2%can these optimization measures maintain the emissions in 2030 at a similar level to that in ***,the synergistic effects between PER and CER should be considered when formulating a development route for the ISI in the future.

关键词： Iron and steel industry Carbon and pollution emissions Synergistic reduction Technological structure Steel scrap Cross-elasticity

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Evaluating a river's ecological health: A multidimensional approach

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environmental Science and Ecotechnology 2024年第5期21卷 268-277页

作者： Qiuyun Zhao Yangyang Zhang Xiuwen Li Xiaodong Hu Rui Huang Jixiong Xu Zilong Yin Xinjie Gu Yuncheng Xu Jinbao Yin Qing Zhou Aimin Li Peng Shi State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing210023China Jiangsu Hydraulic Research Institute Nanjing210023China

Evaluating the health of river surface water is essential,as rivers support significant biological resources and serve as vital drinking water *** the Water Quality Index(WQI)is commonly employed to evaluate surface water quality,it fails to consider biodiversity and does not fully capture the ecological health of *** we show a comprehensive assessment of the ecological health of surface water in the lower Yangtze River(LYR),integrating chemical and biological *** to traditional WQI metrics,the LYR's surface water generally meets China's Class II ***,it also contains 43 high-risk emerging contaminants;nitrobenzenes are found at the highest concentrations,representing 25e90%of total detections,while polycyclic aromatic hydrocarbons present the most substantial environmental risks,accounting for 81e93%of the total risk ***,the plankton-based index of biological integrity(P-IBI)rates the ecological health of the majority of LYR water samples(59.7%)as‘fair’,with significantly better health observed in autumn compared to other seasons(p<0.01).Our findings suggest that including emerging contaminants and P-IBI as additional metrics can enhance the traditional WQI analysis in evaluating surface water's ecological *** results highlight the need for a multidimensional assessment approach and call for improvements to LYR's ecological health,focusing on emerging contaminants and biodiversity rather than solely on reducing conventional indicators.

关键词： The lower reaches of the Yangtze River High-risk emerging contaminants Plankton Ecological risk Biological integrity

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Coking of Pt/γ-Al_(2)O_(3) catalyst in landfill gas deoxygen and its effects on catalytic performance

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Chinese Journal of Chemical Engineering 2023年第5期57卷 224-232页

作者： Xinyu Yang Zezhi Chen Huijuan Gong State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210023China Center of Materials Analysis Nanjing UniversityNanjing 210093China

Catalytic oxidation of CH_(4) has been proved to be an attractive option for landfill gas(LFG) ***, coking of catalysts in catalytic LFG deoxygen has been clearly observed in industrial applications. In this regard, it is necessary to investigate whether coke deposition originates from CH_(4) or volatile organic compounds present in LFG, and the influence of coke deposition on catalytic performance. Herein,we evaluate the LFG deoxygen on Pt/γ-Al_(2)O_(3) catalyst in simulated LFG(CH_(4), CO_(2), O_(2), N_(2)) and its co-feed with representative volatile organic compounds, ethylbenzene, toluene, benzene and cyclohexane. The results show that the coking of the catalyst is originated from volatile organic compounds rather than CH_(4). The Pt/γ-Al_(2)O_(3) catalyst does not deactivate during LFG deoxygen process, even significant amount of coke deposited, up to 18.15%(mass). Characterization analyses reveal that although coke deposition overall covers the catalyst surface, resulting in mesopores blockage and a reduced number of accessible Pt sites, however, the coke formed, H-rich carbonaceous components, behaves as counterpart for O_(2) elimination. Besides, the coke deposited is mainly filamentous. Thus, coke formation has little negative effect on the overall catalytic performance of Pt/γ-Al_(2)O_(3) catalyst ultimately. The results obtained in this work are helpful for the rational design of robust Pt based catalysts for LFG deoxygen without undue attention to their coking properties, and also favor the innovation of more attractive purification scheme configurations.

关键词： Landfill gas Deoxygen Pt/γ-Al_(2)O_(3) Volatile organic compounds Coke deposition

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Acetylacetone effectively controlled the secondary metabolites of Microcystis aeruginosa under simulated sunlight irradiation

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Journal of environmental Sciences 2024年第1期135卷 285-295页

作者： Xiaomeng Wang Yixin Luo Shujuan Zhang Lixiang Zhou Department of Environmental Engineering College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Inactivation of cyanobacterial cells and simultaneous control of secondary metabolites is of significant necessity for the treatment of cyanobacteria-laden ***(AcAc)has been reported a specific algicide to inactivate Microcystis aeruginosa(***)and an effective light activator to degrade *** study systematically investigated the photodegradation ability of AcAc under xenon(Xe)irradiation on the secondary metabolites of ***,mainly algal organic matter(AOM),especially toxic microcystin-LR(MC-LR).Results showed that AcAc outperformed H_(2)O_(2)in destructing the protein-like substances,humic acid-like matters,aromatic proteins and fulvic-like substances of *** MC-LR(250μg/L),0.05 mmol/L AcAc attained the same degradation efficiency(87.0%)as 0.1mmol/L H_(2)O_(2).The degradation mechanism of Xe/AcAc might involve photo-induced energy/electron transfer and formation of carbon center *** conditions(pH>9.0)were detrimental to the photoactivity of AcAc,corresponding to the observed degradation rate constant(k_(1)value)of MC-LR drastically decreasing to 0.0013 min^(-1)as solution pH exceeded *** PO_(4)^(3-)and HCO_(3)^(-)ions had obvious inhibition effects,whereas NO_(3)^(-)slightly improved k_(1)value from 0.0277 min^(-1)to 0.0321 min^(-1).The presence of AOM did not significantly inhibit MC-LR degradation in Xe/AcAc *** addition,the biological toxicity of MC-LR was greatly reduced after *** results demonstrated that AcAc was an alternative algicidal agent to effectively inactivate algal cells and simultaneously control the secondary metabolites after cell ***,the concentration and irradiation conditions should be further optimized in practical application.

关键词： Microcystis aeruginosa Photodegradation Acetylacetone Secondary metabolites Microcystin

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Mitigation of hydrogen sulfide production in sewer systems by inhibiting sulfate-reducing bacteria:a review

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Frontiers of environmental Science & Engineering 2025年第3期19卷 209-227页

作者： Zheng Qi Tipei Jia Wenjie Cong Jinying Xi Environmental Simulation and Pollution Control State Key Joint Laboratory School of EnvironmentTsinghua UniversityBeijing 100084China

The emission of hydrogen sulfide(H_(2)S)in sewers leads to pipeline corrosion and odor ***-reducing bacteria(SRB)reduce sulfate as the main pathway for H_(2)S production in *** SRB activity through chemical or biological methods is an effective strategy to reduce H_(2)S ***,the objective of this review is to provide a comprehensive summary of research in the reduction of H_(2)S production in sewer systems via inhibition of the metabolic activity of *** study provides an understanding on the complex metabolism of SRB,which is crucial for mitigating H_(2)S generation in sewer *** review addresses H_(2)S production in sewer systems and its reduction methods by inhibiting SRB activity using both chemical and biological ***,the addition of chemicals to sewer systems to control H_(2)S has shown good ***,these methods face challenges such as the need for repeated dosing,short effective durations,bacterial resistance,and increased loads on downstream wastewater treatment *** agents are more environmentally friendly,but research on their application for controlling H_(2)S in sewer systems is limited,and their effectiveness and stability are yet to be *** review analyses the potential of chemical and biological methods,discusses current applications and future research directions based on SRB inhibition mechanisms,and provides insights for developing more efficient and ecofriendly strategies for H_(2)S control in sewer systems.

关键词： Chemical dosing Biological agent Hydrogen sulfide Sewer systems Sulfatereducing bacteria

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Microbial Electrochemical Wastewater Refining

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Engineering 2025年第3期46卷 245-256页

作者： Na Chu Daping Li Raymond Jianxiong Zeng Yong Jiang Peng Liang Fujian Key Laboratory of Pollution Control and Resource Reuse College of Environmental and Resource SciencesFujian Normal UniversityFuzhou 350117China CAS Key Laboratory of Environmental and Applied Microbiology Environmental Microbiology Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Wastewater treatment significantly contributes to greenhouse gas emissions,which are further exacerbated by the environmental impact of external chemical *** response,microbial electrochemical wastewater refining has gained prominence at the interdisciplinary frontier of wastewater resource recovery and green *** progress has been made in utilizing active electrodes to stimulate CO_(2) fixation rates,applying“binary electron donors”to produce high-value-added chemicals,and developing novel processes and *** review explores various aspects of microbial electrochemical wastewater refining,including microbial electrochemical monitoring of water quality,chemical synthesis from diverse carbon sources,and the deployment of pilot-scale systems for generating electricity,hydrogen,and methane,as well as for in-situ ***,it discusses the challenges and future directions,highlighting the importance of understanding mechanisms,advancing electrocatalyst and microbial engineering,and innovating hybrid *** conclusion,the widespread adoption of microbial electrochemical wastewater refining is emphasized for resource recovery and sustainable chemical production,ultimately reducing environmental impact.

关键词： Microbial electrosynthesis Extracellular electron transfer CO_(2)reduction Wastewater treatment resources recovery

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Diversity and dynamic response of anaerobic ammonia oxidation granular sludge

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Journal of environmental Sciences 2025年第6期152卷 262-275页

作者： Jiahong Ye Xiang Li Yan Yuan Yayi Wang Yong Huang JunMa Han Wang Pengze Dang Pei-ling Xu School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China State Key Laboratory of Pollution Control and Resources Reuse Shanghai Institute of Pollution Control and Ecological SecurityCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Red anaerobic ammonia oxidation (Anammox) granular sludge (AnGS) has been reported insuccessfully operating Anammox systems, and its color is associated with sludge ***, in long-term operating systems, AnGS exhibits different sensory colors, physicalstructures, community structures, and denitrification performance, but the relationship betweenthem has not yet been *** AnGS of the Anammox system, which has beenin operation for more than a decade, can be divided into twomain categories: red and *** specific Anammox activity (SAA) in conventional red AnGS increased continuously asthe particle size increased from <0.51 mm to 6.02 ± 0.84 mm. The SAA of white AnGS wereslightly lower than those of red AnGS with similarly-size granules but significantly higherthan AnGS with smaller red granules. Compared with red AnGS, the extracellular polymericsubstances of white AnGS were significantly reduced,mainly due to the higher intracellulariron content, resulting in lower heme c concentration. Thus, heme c may prove not to bean evaluative tool for measuring Anammox activity. Red and white AnGS, whether throughself-aggregation or adsorption by hydroxyl apatite and other carriers, will face the fate ofinternal voids during particle size growth. White AnGS exhibited amore complex microbialcommunity than red AnGS. Candidatus Brocadia was abundant in red AnGS and the abundanceincreased with increasing granule size. Candidatus Kuenenia and Candidatus Jetteniamade significant contributions to denitrification in white AnGS. This study provides a newperspective on particle selection for anammox engineering applications.

关键词： Anaerobic ammonium oxidation granular sludge Sensory diversity Intracellular iron Heme Enzyme activity Microbial diversity

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Synergy of metal-support interaction and positive Pd species promoting efficient C-CI bond activation on Pd-based Ce-MOF-derived catalysts

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Rare Metals 2024年第11期43卷 5835-5847页

作者： Xiao-Jie Hu Yu-Han Sun Ling-Yue Liu Dan-Jun Mao Shou-Rong Zheng State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHong Kong 999077Hong KongChina

Monochloroacetic acid(MCAA)is identified as a highly carcinogenic disinfection by-product in chlorinated drinking *** this study,a series of CeO_(2)-supported Pd catalysts(Pd/MCeO_(2))were synthesized through one-step calcination of Pd-loaded Ce-UiO-66-BDC(CeMOF),and the liquid-phase catalytic hydrodechlorination of MCA A was explored using these *** comparison,Pd/CeO_(2)catalysts were additionally synthesized using the conventional impregnation *** characterization results reveal that the catalysts exhibit strong metal-support interaction,leading to high Pd dispersion and Pd^(n+)***,the calcination temperature significantly influences catalytic performance,with the catalyst calcined at 500℃(Pd/MCeO_(2)-500)demonstrating the highest catalytic activity and achieving complete dechlorination of MCA A within 50 ***,it is found that the catalytic MCAA hydrodechlorination using the catalysts adheres to the Langmuir-Hinshelwood ***,low reaction pH is favorable for the catalytic hydrodechlorination of MCAA,enhancing MCAA adsorption on the catalyst surface due to the electrostatic interaction between MCAA and the catalyst *** results suggest that the presence of Pd^(n+)efficiently facilitates MCAA adsorption and C-Cl cleavage,thus significantly enhancing the liquid-phase catalytic hydrodechlorination.

关键词： Ce-UiO-66-BDC One-step calcination Metal-support interaction Liquid-phase catalytic hydrodechlorination Monochloroacetic acid

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Enzymatic pretreatment mitigates the dissemination of antibiotic resistance genes via regulating microbial populations and gene expressions during food waste fermentation

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Chinese Chemical Letters 2023年第8期34卷 259-264页

作者： Yang Wu Wanying Hu Haining Huang Xiong Zheng Lei Dong Yinguang Chen State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Food waste(FW)has been recognized as essential reservoir for resource recovery via anaerobic fermentation,which could also bring the potential risk of antibiotic resistance genes(ARGs)*** the structural deficiency of FW could be stimulated by enzymatic pretreatment to enhance fermentation efficiency,the influences of enzymatic pretreatment on ARGs fate and microbial metabolic pathways involved in ARGs dissemination have rarely been *** work proved that enzymatic pretreatment could effectively decrease the total abundance of ARGs(reduced by 13.8%-24.5%)during long-term FW *** was found that enzymatic pretreatment significantly reduced the ARGs belonging to the efflux pump,which might be ascribed to its ability to increase membrane ***,enzymatic pretreatment was in favor of reducing microbial diversity and various potential ARGs host(e.g.,Methanosarcina,Clostridium,Prevotella,Parabacteroides).Also,this pretreatment remarkably up-regulated the genetic expressions involved in ABC transporter(e.g.,eryF and mntA)and down-regulated the genetic expressions that participated in DNA replication,two-component systems(e.g.,uphA and cckA),and quorum sensing(e.g.,rpfF and lsrG),thereby decreasing ARGs *** study would expand the insight of the influences of pretreatment method on ARGs fate during FW fermentation,and offer practical guidance on the sustainable management of FW.

关键词： Food waste(FW) Antibiotic resistance genes(ARGs) Enzymatic pretreatment Microbial populations Metabolic pathways

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