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Synergistic effects of sodium hypochlorite disinfection and iron-oxidizing bacteria on early corrosion in cast iron pipes

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 61-70页

作者： Weiying Li Yu Tian Jiping Chen Xinmin Wang Yu Zhou Nuo Shi State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China College of Environmental Science and Engineering Tongji UniversityShanghai 200092China

Corrosion in drinking water distribution systems(DWDSs)may lead to pipe failures and water quality deterioration;biocorrosion is the most common *** disinfectants are widely used in DWDSs to inhibit microorganism growth,but these also promote electrochemical corrosion to a certain *** study explored the independent and synergistic effects of chlorine and microorganisms on pipeline *** hypochlorite(NaOCl)at different concentrations(0,0.25,0.50,and 0.75 mg/L)and iron-oxidizing bacteria(IOB)were added to the reaction system,and a biofilm annular reactor(BAR)was employed to simulate operational water supply pipes and explain the composite *** degree of corrosion became severe with increasing NaOCl *** accelerated the corrosion rate at an early stage,after which the reaction system gradually *** NaOCl and IOB existed together in the BAR,both synergistic and antagonistic effects occurred during the corrosion *** AOC content increased due to the addition of NaOCl,which is conducive to bacterial ***,biofilm on cast iron coupons was greatly influenced by the disinfectant,leading to a decrease in microbial biomass over *** research is needed to provide guidelines for pipeline corrosion control.

关键词： Cast iron pipe corrosion Drinking water distribution systems Chlorine disinfection Iron-oxidizing bacteria Coupling effects

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Synergistic promotion of particulate matter reduction and production performance via adjusting electrochemical reactions in the zinc electrolysis industry

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 23-33页

作者： Zizhen Ma Jingkun Jiang Lei Duan Jianguo Deng Fuyuan Xu Zehui Li Linhua Jiang Ning Duan School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of the EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Physics Peking UniversityBeijing 100871China

Heavy particulate matter (PM) pollution and high energy consumption are the bottlenecks of hydrometallurgy, especially in the electrolysis process. Therefore, an urgent need is to explore PM reduction methods with production performance co-benefits. This study presents three PM reduction methods based on controlling operating parameters, i.e., lowering electrolyte temperature, H2SO4 concentration, and current density of the cathode. The optimized conditions were also investigated using the response surface methodology to balance the PM reduction effect and Zn production. The results showed that lowering electrolyte temperature is the most efficient, with an 89.0% reduction in the PM generation flux (GFPM). Reducing H2SO4 concentration led to the minimum side effects on the current efficiency of Zn deposition (CEZn) or power consumption (PC). With the premise of non-deteriorating CEZn and PC, GFPM can be reduced by 86.3% at the optimal condition (electrolyte temperature = 295 K, H2SO4 = 110 g/L, current density = 373 A/m^(2)). In addition, the reduction mechanism was elucidated by comprehensively analyzing bubble characteristics, electrochemical reactions, and surface tension. Results showed that lower electrolyte temperature inhibited the oxygen evolution reaction (OER) and compressed gas volume. Lower H2SO4 concentration inhibited the hydrogen evolution reaction (HER) and reduced electrolyte surface tension. Lower current density inhibited both OER and HER by decreasing the reaction current. The inhibited gas evolutions reduced the microbubbles’ number and size, thereby reducing GFPM. These results may provide energy-efficient PM reduction methods and theoretical hints of exploring cleaner PM reduction approaches for industrial electrolysis.

关键词： Zinc electrolysis Particulate matter Energy consumption Operating parameters Bubble characteristic Electrochemical reaction

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Pyrogenic carbon accelerates iron cycling and hydroxyl radical production during redox fluctuations of paddy soils

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Biochar 2023年第1期5卷 657-673页

作者： Danyu Huang Ning Chen Yuan Lin Chenghao Ge Xiaolei Wang Dixiang Wang Changyin Zhu Guodong Fang Dongmei Zhou State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023JiangsuPeople’s Republic of China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008JiangsuPeople’s Republic of China

Carbon materials(e.g.,pyrogenic carbon(PyC))are widely used in agricultural soils and can participate in various biogeochemical processes,including iron(Fe)*** soils,Fe (Ⅱ)species have been proposed as the main active contributor to produce reactive oxygen species(ROS),which are involved in various biogeochemical ***,the effects of PyC on the transformation of different Fe species in soils and the associated production of ROS are rarely *** study examined the influence of PyC(pyrolyzed at 300-700℃)on Fe (Ⅱ)/Fe(Ⅲ)cycling and hydroxyl radical(·OH)production during redox fluctuations of paddy *** showed that the reduction of Fe(Ⅲ)in soils was facilitated by PyC during anoxic incubation,which was ascribed to the increased abundance of dissimilatory Fe(Ⅲ)-reducing microorganisms(biotic reduction)and the electron exchange capacity of PyC(abiotic reduction).During oxygenation,PyC and higher soil pH promoted the oxidation of active Fe (Ⅱ)species(e.g.,exchangeable and low-crystalline Fe (Ⅱ)),which consequently induced higher yield of·OH and further led to degradation of imidacloprid and inactivation of soil *** results demonstrated that PyC accelerated Fe (Ⅱ)/Fe(Ⅲ)cycling and·OH production during redox fluctuations of paddy soils(especially those with low content of soil organic carbon),providing a new insight for remediation strategies in agricultural fields contaminated with organic pollutants.

关键词： Paddy soil Pyrogenic carbon Iron species Hydroxyl radical Imidacloprid degradation

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High potential in synergizing the reduction of dissolved organic carbon concentration and carbon dioxide emissions for submerged-vegetationcovered river networks

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Journal of Environmental Sciences 2025年第5期151卷 298-309页

作者： Qingqian Li Ruixia Liu Zhangmu Jing Yanjie Wei Shengqiang Tu Huibin Yu Hongjie Gao Peng Yuan State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental ScienceBeijing 100012China State Environmental Protection Key Laboratory of Estuarine and Coastal Environment Chinese Research Academy of Environmental ScienceBeijing 100012China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of Municipal and Environmental Engineering Shenyang Jianzhu UniversityShenyang 110168China

Various technologies and projects have been explored and developed for the synergetic control of environmental pollution and carbon emissions in aquatic *** submerged vegetation in shallow waters was also expected to achieve this ***,the magnitude and mechanism of carbon dioxide(CO_(2))emission affected by submerged vegetation is not clear enough in complex aquatic *** study investigated the influences of submerged plants on CO_(2)emission,ecosystem metabolism features,and microbial community traits based on observations in river networks on the Changjiang River *** results showed that CO_(2)emission from planted waters accounted for 73%of unplanted ***,planted waters had higher dissolved organic carbon removal capacity in overlying water and higher potential of carbon sequestration in sediment at the same *** distinctions between the two habitats were attributed to(1)improved CO_(2)and bicarbonate consumption in water columns via enhancing photosynthesis and(2)inhibited CO_(2)production by reconstructing the benthic microbial *** eco-advantages were found in planted sediments,such as a high potential of methane oxidation and xenobiotics biodegradation and a low risk of becoming black and *** brief,submerged vegetation is beneficial in promoting pollution removal and carbon retention *** study advances our understanding of the feedback between aquatic metabolism and CO_(2)emission.

关键词： Mitigated CO_(2)emission Submerged vegetation Paired O_(2)-CO_(2)departure Carbon uptake velocity Microbial metabolism pathways The Changjiang River

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Synergistic effects of peroxydisulfate on UV/O_(3) process for tetracycline degradation:Mechanism and pathways

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Chinese Chemical Letters 2024年第10期35卷 408-413页

作者： Fengrui Yang Debing Wang Xinying Zhang Jie Zhang Zhichao Wu Qiaoying 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 Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment&Safety EngineeringFuzhou University.Fuzhou 350108China

Tetracycline(TC)as a typical emerging pollutant is becoming a serious threat to the environment and human health.A combined advanced oxidation technology of UV/Ozone(O_(3))/peroxydisulfate(PDS)process was developed to explore an efficient and economic treatment process of TC in ***,the reactive sites and transformation pathways of TC were explored and the toxicity of the intermediates was quantified with a quantitative structure-activity relationship(QSAR)*** degradation performance of TC was substantially enhanced in UV/O_(3)/PDS process with a kobsof 0.0949 min-1,which was 2.3 times higher than UV/O_(3)and 3.2 times than sole *** results demonstrated that there was a superior synergistic effect of PDS on UV/O_(3)processes for the degradation of *** paramagnetic resonance(EPR)analysis and quenching experiments show that·OH,SO_(4)·-,O_(2)·-and1O_(2)all contributed to TC degradation in the UV/O_(3)/PDS process and exhibited a synergistic effect,which inhibited the generation of harmful *** addition,the UV/O_(3)/PDS system can effectively degrade TC in a wide range of substrate concentrations and pH,and also showed excellent adaptability to various concentrations of anions(Cl-and HCO_(3)-).This study proves the feasibility of UV/O_(3)/PDS process for treating TC contaminated wastewater with complicated water matrix.

关键词： UV/ozonation/peroxydisulfate Synergistic effect Tetracycline Degradation Wastewater

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PICRUSt2 functionally predicts organic compounds degradation and sulfate reduction pathways in an acidogenic bioreactor

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Frontiers of Environmental Science & Engineering 2022年第4期16卷 81-93页

作者： Jun Li Aimin Li Yan Li Minhui Cai Gan Luo Yaping Wu Yechao Tian Liqun Xing Quanxing Zhang State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China

For comprehensive insights into the influences of sulfate on performance,microbial community and metabolic pathways in the acidification phase of a two-phase anaerobic system,a laboratory-scale acidogenic bioreactor was continuously operated to treat wastewater with elevated sulfate concentrations from 2000 to 14000 mg/*** results showed that the acidogenic bioreactor could achieve sulfate reduction efficiency of greater than 70%for influent sulfate content less than 12000 mg/*** sulfate induced the accumulation of volatile fatty acids(VPAs),especially propionate and butyrate,which was the primary negative effects to system performance under the high-sulfate ***-throughput sequencing coupled with PICRUSt2 uncovered that the accumulation of VFAs was triggered by the decreasing of genes encoding short-chain acyl-CoA dehydrogenase(EC:1.3.8.1),regulating the transformation of propanoyl-CoA to propenoyl-CoA and butanoyl-CoA to crotonyl-CoA of propionate and butyrate oxidation pathways,which made these two process hardly ***,genes encoding(EC:1.3.8.1)were mainly carried by order *** was the most abundant sulfate-reducing bacteria and identified as the primary host of dissimilatory sulfate reduction ftinctional *** analysis indicated the dissimilatory sulfate reduction process predominated under a low sulfate environment,but was not favored under the circumstance of *** the increase of sulfate,the assimilatory sulfate reduction process finally overwhelmed dissimilatory as the dominant sulfate reduction pathway in acidogenic bioreactor.

关键词： Acidogenic phase reactor High-sulfate wastewater Sulfate reduction Acidogenic fermentation PICRUSt2

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Sulfur-driven methylmercury production in paddies continues following soil oxidation

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Journal of Environmental Sciences 2022年第9期34卷 166-174页

作者： Wenli Tang Chao Tang Pei Lei School of the Environment State Key Laboratory of Pollution Control and Resource ReuseNanjing UniversityNanjing 210023China School of Environment Nanjing Normal UniversityNanjing 210023China

Methylmercury(MeHg) production in paddy soils and its accumulation in rice raise global concerns since rice consumption has been identified as an important pathway of human exposure to MeHg. Sulfur(S) amendment via fertilization has been reported to facilitate Hg methylation in paddy soils under anaerobic conditions, while the dynamic of S-amendment induced MeHg production in soils with increasing redox potential remains unclear. This critical gap hinders a comprehensive understanding of Hg biogeochemistry in rice paddy system which is characterized by the fluctuation of redox potential. Here, we conducted soil incubation experiments to explore MeHg production in slow-oxidizing paddy soils amended with different species of S and doses of sulfate. Results show that the elevated redox potential(1) increased MeHg concentrations by 10.9%-35.2%, which were mainly attributed to the re-oxidation of other S species to sulfate and thus the elevated abundance of sulfatereducing bacteria, and(2) increased MeHg phytoavailability by up to 75% due to the reductions in acid volatile sulfide(AVS) that strongly binds MeHg in soils. Results obtained from this study call for attention to the increased MeHg production and phytoavailability in paddy soils under elevated redox potentials due to water management, which might aggravate the MeHg production induced by S fertilization and thus enhance MeHg accumulation in rice.

关键词： Mercury Sulfur Availability Mercury methylation Rice

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Smart Gas Sensors:Recent Developments and Future Prospective

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Nano-Micro Letters 2025年第3期17卷 55-86页

作者： Boyang Zong Shufang Wu Yuehong Yang Qiuju Li Tian Tao Shun Mao College of Environmental Science and Engineering Biomedical Multidisciplinary Innovation Research InstituteShanghai East HospitalState Key Laboratory of Pollution Control and Resource ReuseTongji University1239 Siping RoadShanghai 200092People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092People’s Republic of China Microbiome Medicine Center Department of Laboratory MedicineZhujiang HospitalSouthern Medical UniversityGuangzhou 510280People’s Republic of China

Gas sensor is an indispensable part of modern society withwide applications in environmental monitoring,healthcare,food industry,public safety,*** the development of sensor technology,wireless communication,smart monitoring terminal,cloud storage/computing technology,and artificial intelligence,smart gas sensors represent the future of gassensing due to their merits of real-time multifunctional monitoring,earlywarning function,and intelligent and automated *** electronicand optoelectronic gas sensors have been developed for high-performancesmart gas *** the development of smart terminals and the maturityof integrated technology,flexible and wearable gas sensors play an increasingrole in gas *** review highlights recent advances of smart gassensors in diverse *** structural components and fundamentalprinciples of electronic and optoelectronic gas sensors are described,andflexible and wearable gas sensor devices are ***,sensorarray with artificial intelligence algorithms and smart gas sensors in“Internet of Things”paradigm are ***,the challengesand perspectives of smart gas sensors are discussed regarding the future need of gas sensors for smart city and healthy living.

关键词： Smart gas sensor Electronic sensor Optoelectronic sensor Flexible and wearable sensor Artificial intelligence

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Dual-selective silver recovery strategy by simultaneous adsorption-reduction boosted by in-situ magnetic field

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Green Energy & Environment 2025年第2期10卷 433-440页

作者： Jianran Ren Zhiliang Zhu Yanling Qiu Fei Yu Tao Zhou Jie Ma Jianfu Zhao Research Center for Environmental Functional Materials State Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental Science and EngineeringTongji UniversityShanghai200092China School of Civil Engineering Kashi UniversityKashi844000China College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai201306China

The mainstream silver recovery has problems such as resource waste,weak silver selectivity,and complicated ***,self-propelled magnetic enhanced capture hydrogel(magnetic NbFeB/MXene/GO,MNMGH)was prepared by self-crosslinking encapsulation *** achieved high selectivity(K_(d)=23.31 mL/g)in the acidic range,and exhibited ultrahigh silver recovery capacity(1604.8 mg/g),which greatly improved by 66%with the assistance of in-situ magnetic *** recovered silver crystals could be directly physically exfoliated,without acid/base *** selective sieving effect of adsorption,MNMGH preferentially adsorbed Ag(I),and then selectively reduced to Ag(0),realizing dual-selective *** in-situ magnetic field enhanced selective adsorption by enhancing mass transfer,reactivity of oxygen-containing functional ***,density function theory simulations demonstrated that the in-situ magnetic field could lower the silver reduction reaction energy barrier to enhance the selective ***-drive synergy system(reduction drive,adsorption drive and magnetic drive)achieved ultrahigh silver recovery *** study pioneered an in-situ magnetic field assisted enhancement strategy for dual-selective(adsorption/reduction)recovery of precious metal silver,which provided new idea for low-carbon recovery of noble metal from industrial waste liquids.

关键词： In-situ magnetic field Silver recovery Adsorption-reduction Selectivity Physical separation

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Quantifying the performance of urban sewer network using inverse-problem models: An approach for synchronous determination of in-sewer groundwater infiltration and pollutant degradation

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Journal of Hydrodynamics 2025年第1期37卷 1-13页

作者： Hui-jin Zhang Zu-xin Xu Wan-qiong Wang Shou-hai Peng Chong Li Shuai Fang Danlu Guo Hai-long Yin Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water ResourcesTongji UniversityChinaShanghai 200092China State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China China Three Gorges Corporation Wuhan 430010China School of Engineering College of EngineeringComputing and CyberneticsAustralian National UniversityCanberraAustralia

The performance of sewer network is associated with both clean water infiltration and in-sewer pollutant *** their contributions in large-scale sewer network remains challenging due to the infeasibility of numerous on-site measurements of water flows and water quality concentrations in the whole *** study developed a physically inverse problem approach to address this challenge,which was tested in an actual sewer network system(25.66 km^(2))with gridding-based in-sewer flow rate and water quality *** optimization framework was integrated into sewer hydrodynamic and water quality models to inversely estimate source parameters including source flow rates and source discharge *** simulated annealing algorithm can demonstrate 20.6%-54.2% higher accuracy compared with the other methods,due to its progressive instead of fast and steep convergence toward the true *** the developed approach,the infiltrated clean water infiltration and mass loss of chemical oxygen demand(COD)within the sewer network were quantified ***,the condition of sewer structural defects was assessed,and a reference value for allowable in-sewer COD degradation was also presented,which was 4%-5%COD mass per hour of sewage hydraulic ***,this methodology can provide cost-effective solution for comprehensive assessment of sewer network conditions.

关键词： Sewer network mathematical model inverse problem approach pollutant degradation hydraulic transport

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