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SSRN 2024年

作者： Guo, Jingxia Ge, Chenghao Abulimiti, Madinai Hu, Cong Wang, Guo Zhou, Dongmei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China College of Resource and Environmental Science Soil Environmental Health and Regulation Key Laboratory of Fujian Province Fujian Agriculture and Forestry University Fuzhou350002 China

Cadmium (Cd) contamination in rice ecosystems poses substantial threats to global food security and ecological integrity. This study examines the effect of chloride (Cl-) addition on the dynamics of Cd in soil and rice plants. Our findings indicated that Cl- addition markedly decreased soil pH, increased Eh, and facilitated the formation of Cl-Cd complexes, resulting in enhancing the solubility, mobility, and bioavailability of Cd. Furthermore, Cl- addition also led to considerable reductions in DTPA-extractable iron (Fe) and manganese (Mn), which indirectly boosted Cd uptake by rice roots, ranging from 17.4% to 65.0%, through the upregulation of transport genes OsNramp1 and OsNramp5, and decreased iron plaque formation by 23.1% to 27.2%. Additionally, Cl- stimulated Cd transport form roots to shoots by upregulating the OsHMA2 gene, enhancing Cd accumulation in rice tissues and facilitating its translocation across plant compartments, ultimately resulting in elevated Cd levels in brown rice (41.3%~76.1%). Field trials have substantiated that Cl- application significantly enhanced Cd absorption in rice plants cultivated in slightly acid and Cd-contaminated soils, implying introducing Cl- exacerbates the risk of Cd accumulation in rice grains. Consequently, to safeguard food safety and protect ecological health, the use of Cl-containing materials in agricultural practices should be avoided. © 2024, The Authors. All rights reserved.

关键词： Biochemistry

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Synergistic effects of tree-herb intercropping on the phytoremediation efficiency of cadmium and lead contaminated soil

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Science of the Total environment 2024年 954卷 176709页

作者： Zhang, Chentao Zha, Yidi Guang, Penghong Ai, Fuxun Yin, Ying Guo, Hongyan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Joint International Research Centre for Critical Zone Science-University of Leeds and Nanjing University Nanjing University Nanjing210023 China

Tree-herb intercropping has emerged as an effective strategy for the remediation of soil contamination. In this study, the effects of intercropping willow with herbaceous plants Lolium perenne L., Iris lactea Pall. and Bidens pilosa L. were investigated on the phytoremediation of Cd- and Pb-contaminated soil. After a 90-day of cultivation, the results showed that intercropping stimulated the phytoremediation efficiency through increased metal accumulation in plants. Intercropping caused a significant (p © 2024 Elsevier B.V.

关键词： Soil pollution

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Enhanced sludge dewaterability using a bifunctional hybrid coagulant

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Chemosphere 2023年 344卷 140323页

作者： Shen, Shaohang Xia, Wei Luo, Zhang Pan, Yu Hu, Pan Zhang, Longguan Shi, Hongtao Yang, Hu State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China China Railway Engineering Services Co. Ltd. Chengdu610083 China

The combination of coagulation and addition of skeleton builder is a popular pretreatment method to improve the dewaterability of sludge. In this study, a novel bifunctional inorganic/organic hybrid coagulant (CS–Si@ATP) was designed and obtained by chemically coupling a cationic starch (CS) with a popular clay, that is, attapulgite (ATP), via a silane coupling agent (APTES) for one-step conditioning of sludge. CS-Si@ATP can evidently enhance the sludge dewatering performance compared with CS, ATP, and their simple combination due to the distinct dual functions of this hybrid coagulant. The tentacle-like cationic CS in CS-Si@ATP shows efficient charge neutralization effect to aggregate and precipitate the suspended solids for further formation of compact sludge cakes. Meanwhile, the internal ATP with a stable and rigid structure acts as the skeleton builder to notably improve the filterability and permeability of the sludge cakes. The synergistic effects of CS and ATP in CS-Si@ATP, i.e., the charge neutralization of CS and the skeleton construction of ATP, cause the evidently enhanced sludge dewaterability, with a filter cake moisture content approximately 78.30% after the mechanical dewatering at 0.05 MPa. In comparison with the traditional two-step combination process by separated addition of CS and ATP, the one-step addition of CS-Si@ATP can reduce the required ATP dose nearly an order of magnitude. Thus, CS-Si@ATP has the notable advantages of simple operation, efficient utilization of ATP and evident reduction of disposal cost. This study provides an environmentally friendly and cost-effective coagulant to further improve the dewaterability of sludge. © 2023 Elsevier Ltd

关键词： Starch

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Purple acid phosphatase promoted hydrolysis of organophosphate pesticides in microalgae

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environmental Science and Ecotechnology 2024年第2期18卷 137-149页

作者： Xiang Wang Guo-Hui He Zhen-Yao Wang Hui-Ying Xu Jin-Hua Mou Zi-Hao Qin Carol Sze Ki Lin Wei-Dong Yang Yalei Zhang Hong-Ye Li Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes College of Life Science and TechnologyJinan UniversityGuangzhou510632China School of Energy and Environment City University of Hong KongTat Chee AvenueKowloonHong Kong Centre for Technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneyUltimoNSW2007Australia Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou510000China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai200092China

When organophosphate pesticides(OPs)are not used and handled in accordance with the current rules and standards,it results in serious threats to the aquatic environment and human *** tricornutum is a prospective microalgae-based system for pollutant removal and carbon *** engineered ***,designated as the OE line(endogenously expressing purple acid phosphatase 1[PAP1]),can utilize organic phosphorus for cellular ***,the competencies and mechanisms of the microalgae-based system(namely the OE line of ***)for metabolizing OPs remain to be *** this study,the OE line exhibited the effective biodegradation competencies of 72.12%and 68.2%for 30 mg L^(-1)of dichlorvos and 50 mg L^(-1)of glyphosate,accompanied by synergistic accumulations of biomass(0.91 and 0.95 g L^(-1))and lipids(32.71%and 32.08%),***,the biodiesel properties of the lipids from the OE line manifested a high potential as an alternative feedstock for microalgae-based biofuel production.A plausible mechanism of OPs biodegraded by overexpressed PAP1 is that sufficient inorganic P for adenosine triphosphate and concurrent carbon flux for the reduced form of nicotinamide adenine dinucleotide phosphate biosynthesis,which improved the OP tolerance and biodegradation competencies by regulating the antioxidant system,delaying programmed cell death and accumulating lipids via the upregulation of related *** sum up,this study demonstrates a potential strategy using a genetically engineered strain of *** to remove high concentrations of OPs with the simultaneous production of biomass and biofuels,which might provide novel insights for microalgae-based pollutant biodegradation.

关键词： Biodegradation Lipid accumulation Organophosphate pesticide Phaeodactylum tricornutum Purple acid phosphatase

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Energy-efficient removal of carbamazepine in solution by electrocoagulation-electrofenton using a novel P-rGO cathode

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Journal of environmental Sciences 2022年第5期34卷 88-102页

作者： Zhihui Xiao Tingyu Cui Zhenbei Wang Yan Dang Meijie Zheng Yixinfei Lin Zilong Song YipingWang Chao Liu Bingbing Xu Amir Ikhlaq Jolanta Kumirska Ewa Maria Siedlecka Fei Qi Beijing Key Lab for Source Control Technology of Water Pollution School of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Jiangsu Key Lab of Industrial Pollution Control and Resource Reuse School of Environmental EngineeringXuzhou University of TechnologyXuzhou 221018China State Key Lab of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Institute of Environment Engineering and Research University of Engineering and TechnologyGT Road54890LahorePunjabPakistan Faculty of Chemistry University of GdanskWita Stwosza 6380-308 GdanskPoland

In this study,carbamazepine(CBZ)decay in solution has been studied by coupling electro-coagulation with electro-Fenton(EC-EF)with a novel P-rGO/carbon felt(CF)cathode,aiming to accelerate the in-situ generation of·OH,instead of adding Fe2+and ***,the fabri-cated P-rGO and its derived cathode were characterized by XRD,SEM,AFM,XPS and electro-chemical test(EIS,CV and LSV).Secondly,it was confirmed that the performance in removal efficiency and electric energy consumption(EEC)by EC-EF(kobs=0.124 min^(-1),EEC=43.98 kWh/kg CBZ)was better than EF(kobs=0.069 min^(-1),EEC=61.04 kWh/kg CBZ).Then,P-rGO/CF(kobs=0.248 min^(-1),EEC=29.47 kWh/kg CBZ,CE=61.04%)showed the best performance in EC-EF,among all studied heteroatom-doped graphene/*** superior performance may be associated with its largest layer spacing and richest C=C,which can promote the electron transfer rate and conductivity of the ***,more H2O2 and·OH could be produced to degrade CBZ,and almost 100%CBZ was removed with kobs being 0.337 min^(-1) and the EEC was only 24.18 kWh/kg CBZ,under the optimal conditions(P-rGO loading was 6.0 mg/cm^(2),the current density was 10.0 mA/cm^(2),the gap between electrode was 2.0 cm).Additionally,no matter the influent is acidic,neutral or alkaline,no additional pH adjustment is required for the effluent of *** last,an inconsecutive empirical kinetic model was firstly estab-lished to predict the effect of operating parameters on CBZ removal.

关键词： Carbamazepine Electro-fenton Electrocoagulation Empirical kinetic model P-rGO

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Health benefits from the rapid reduction in ambient exposure to air pollutants after China's clean air actions:progress in efficacy and geographic equality

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National Science Review 2024年第2期11卷 103-113页

作者： Tao Xue Ruohan Wang Meng Wang Yanying Wang Dan Tong Xia Meng Conghong Huang Siqi Ai Fangzhou Li Jingyuan Cao Mingkun Tong Xueqiu Ni Hengyi Liu Jianyu Deng Hong Lu Wei Wan Jicheng Gong Shiqiu Zhang Tong Zhu Institute of Reproductive and Child Health National Health Commission Key Laboratory of Reproductive Health/Department of Epidemiology and Biostatistics Ministry of Education Key Laboratory of Epidemiology of Major Diseases(PKU) School of Public Health Peking University Health Science Centre State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management and Center for Environment and Health Peking University Advanced Institute of Information Technology Peking University Department of Epidemiology and Environmental Health School of Public Health and Health ProfessionsUniversity at Buffalo State Key Joint Laboratory of Environment Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking University Department of Earth System Science Tsinghua University School of Public Health Key Laboratory of Public Health Safety of the Ministry of Education and Key Laboratory of Health Technology Assessment of the Ministry of HealthFudan University College of Land Management Nanjing Agricultural University National&Local Joint Engineering Research Center for Rural Land Resources Use and Consolidation Clean Air Asia

Clean air actions （CAAs） in China have been linked to considerable benefits in public ***,whether the beneficial effects of CAAs are equally distributed geographically is *** high-resolution maps of the distributions of major air pollutants (fine particulate matter[PM2.5]and ozone[O3]) and population,we aimed to track spatiotemporal changes in health impacts from,and geographic inequality embedded in,the reduced exposures to PM2.5and O3from 2013 to *** used a method established by the Global Burden of Diseases *** analyzing the changes in loss of life expectancy（LLE） attributable to PM2.5and O3,we calculated the gain of life expectancy （GLE） to quantify the health benefits of the air-quality ***,we assessed the geographic inequality embedded in the GLE using the Gini index （GI）.Based on risk assessments of PM2.5and O3,during the first stage of CAAs（2013 to 2017）,the mean GLE was 1.87 *** of the sum of the GLE was disproportionally distributed in about one quarter of the population exposed （GI 0.44）.During the second stage of CAAs（2017 to 2020）,the mean GLE increased to 3.94 months and geographic inequality decreased （GI 0.18）.According to our assessments,CAAs were enhanced,from the first to second stages,in terms of not only preventing premature mortality but also ameliorating health *** enhancements were related to increased sensitivity to the health effects of air pollution and synergic control of PM2.5and *** findings will contribute to optimizing future CAAs.

关键词： clean air action public health inequality fine particulate matter ozone

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Emerging Organic Contaminants in Chinese Surface Water:Identification of Priority Pollutants

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Engineering 2022年第4期8卷 111-125页

作者： Mengmeng Zhong Tielong Wang Wenxing Zhao Jun Huang Bin Wang Lee Blaney Qingwei Bu Gang Yu Beijing Key Laboratory for Emerging Organic Contaminants Control State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC)School of EnvironmentTsinghua UniversityBeijing 100084China Department of Chemical Biochemicaland Environmental EngineeringUniversity of Maryland Baltimore CountyBaltimoreMD 21250USA School of Chemical and Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China

The occurrence and impacts of emerging organic contaminants(EOCs)in the aquatic environment have gained widespread attention over the past two *** to large number of potential contaminants,monitoring campaigns,treatment plants,and proposed regulations should preferentially focus on specific pollutants with the highest potential for ecological and human health *** the present study,a multi-criteria screening approach based on hazard and exposure potentials was developed for prioritization of 405 unregulated EOCs already present in Chinese surface *** potential,exposure potential,and risk quotients for ecological and human health effects were quantitatively analyzed and used to screen *** hazard potential was defined by contaminant persistence,bioaccumulation,ecotoxicity,and human health effects;similarly,the exposure potential was a function of contaminant concentration and detection *** total,123 compounds passed the preselection process,which involved a priority index equal to the normalized hazard potential multiplied by the normalized exposure *** on the prioritization scheme,11 compounds were identified as top-priority,and 37 chemicals were defined as *** results obtained by the priority index were compared with four other prioritization schemes based on exposure potential,hazard potential,or risk quotients for ecological effects or human *** priority index effectively captured and integrated the results from the more simplistic prioritization *** on identified data gaps,four uncertainty categories were classified to recommend:①regular monitoring,derivation of environmental quality standards,and development of control strategies;②increased monitoring;③fortified hazard assessment;and④increased efforts to collect occurrence and toxicity ***,20 pollutants were recommended as priority *** prioritized list of contaminants provides the necessary information for autho

关键词： Prioritization Emerging organic contaminants Hazard potential Ecotoxicity Risk assessment

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Mxene-Supported Mil-88a(Fe) as Persulfate Activator for Removal of Tetracycline

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SSRN 2023年

作者： Chen, Junxia Yang, Zhenzhen Li, Weigang Yang, Yuying Zhu, Feng Huo, Zongli Zhou, Qing State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Jiangsu Provincial Center for Disease Control and Prevention Nanjing210009 China

The poor conductivity，poor stability and agglomeration of MIL-88A(Fe) limit its application as persulfate (PS) activator in water purification. Herein, MXene-supported MIL-88A (Fe) composites (M88A/MX) were synthesized to enhance its adsorption and catalytic capability for tetracycline (TC) removal. M88A/MX-0.2 composites exhibits optimal degradation efficiency，reaching 98% under conditions of 0.2 g/L M88A/MX-0.2, 1.0 mM PS, 20 ppm TC, and pH 5. The degradation rate constants of M88A/MX-0.2 was 0.03217 min-1, which was much higher than that of MIL-88A(Fe) (0.00159 min-1) and MXene (0.00626 min-1). The removal effects of reaction parameters, such as dosage of M88A/MX-0.2 and PS, initial solution pH and the presence of the common co-existing constituents (humic acid and the inorganic anions) were investigated in detail. Additionally, the reuse of M88A/MX-0.2 showed that the composites had good cycling stability. The results of electron paramagnetic resonance (EPR) and quenching experiments indicated that ·OH, ·SO4- and ·O2- were involved in the M88A/MX-0.2/PS system. This study offered a new avenue for sul-fate-based degradation of Fe-based metal organic framework. © 2023, The Authors. All rights reserved.

关键词： Degradation

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Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post in situ mining: a column study and numerical simulation analysis

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Frontiers of environmental Science & Engineering 2023年第8期17卷 137-151页

作者： Gaosheng Xi Xiaojiang Gao Ming Zhou Xiangmei Zhai Ming Chen Xingxiang Wang Xiaoying Yang Zezhen Pan Zimeng Wang Department of Environmental Science and Engineering Fudan UniversityShanghai 200438China School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China CAS Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary Shanghai 202151China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200001China

Ion-absorbed rare earth mines,leached in situ,retain a large amount of ammonium nitrogen(NH4–N)that continuously releases into the surrounding ***,quantitative descriptions and predictions of the transport of NH4–N across mining area with hill slopes are not fully ***,laboratory column experiments were designed with an inclined slope(a sand box)to examine the spatial temporal transport of NH4–N in soils collected from the ionic rare earth elements(REE)mining *** HYDRUS-2D model simulation of the experimental data over time showed that soils had a strong adsorption capacity toward NH4–*** non-equilibrium model(CNEM)could well simulate the transport of NH4–N through the soil-packed *** simulation of the transport-adsorption processes at three flow rates of leaching agents revealed that low flow rate enabled a longer residence time and an increased NH4-N adsorption,but reduced the extraction efficiency for *** the subsequent rainwater washing process,the presence of slope resulted in the leaching of NH4–N on the surface of the slope,while the leaching of NH4–N deep inside the column was ***,the high-intensity rainfall significantly increased the leaching,highlighting the importance of considering the impact of extreme weather conditions during the leaching ***,our study advances the understanding of the transport of NH4–N in mining area with hills,the impact of flow rates of leaching agents and precipitation intensities,and presents as a feasible modeling method to evaluate the environmental risks of NH4–N pollution during and post REE in situ mining activities.

关键词： Ion-absorbed rare earth Ammonium nitrogen transport HYDRUS-2D Numerical simulation

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Facilitating Se(Vi) Adsorption and Electron Transfer by Introducing Αfeooh to Sulfidated Zero-Valent Iron

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SSRN 2024年

作者： Li, Ke Zhang, Yue Qu, Guanjun Xu, Chunhua Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China

Sulfidation of zerovalent iron (SZVI) enhances electron transfer ability due to the formation of FeSx, which facilitates pollutant removal. However, for pollutants that are difficult to adsorb onto SZVI, the longer electron transfer distance results in inefficient removal. The presence of iron (hydr)oxides on ZVI and SZVI is inevitable, and it can adsorb highly mobile pollutants (such as Se(VI)). Here, we regulated the composition of iron (hydr)oxides on ZVI and SZVI surfaces by aging treatment, which improves their Se(VI) removal performance. Based on this, αFeOOH which has a strong affinity for Se(VI), is introduced onto SZVI to synthesize the high-quality composite SZVI-αFeOOH. The characterization results showed that Fe-OH from αFeOOH and FeSx successfully combined and uniformly distributed on SZVI-αFeOOH, creating active sites, and the Se(VI) removal rate (kobs=0.2211 min-1) increased ~7.4 times over SZVI (kobs=0.0297 min-1). The adsorption and reduction of Se(VI) were optimized by regulating the mass ratio of αFeOOH to SZVI. In addition, different initial Se(VI) concentrations and solution pH were designed to explore the effects on Se(VI) removal and evaluate the best removal reaction condition. The mechanism of Se(VI) removal by SZVI-αFeOOH is as follows: Se(VI) is firstly adsorbed on αFeOOH, which shortens the electron transfer distance, and then the absorbed Se(VI) is reduced to readily immobilized states by SZVI. This work proposes a targeted strategy to modify SZVI to efficiently remove pollutants with strong mobile and difficult adsorption. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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