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control locations confuse evaluation of passivation effects of iron-based biochar and selenium applications on wheat grain cadmium accumulation in a Cd-contaminated weakly alkaline soil

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Pedosphere 2025年第3期35卷 549-559页

作者： Feng JING Yan GAO Hongbo LI Guangping FAN Qingya ZHANG Xuezhen GAO Dongmei ZHOU State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences Jiangsu DDBS Environmental Remediation Co. Ltd.

Inhibiting cadmium（Cd） accumulation in wheat grains could reduce the risk of human exposure to Cd. This study conducted a field experiment and evaluated the effects of iron（Fe）-based biochar and selenium（Se） applications alone or in combination on Cd accumulation in wheat grains in a Cd-contaminated weakly alkaline soil of rice-wheat rotation farmland. Considering soil Cd heterogeneity in the field, we set up 22 replicates of control（CK）and three replicates of each Fe-based biochar and/or Se treatment. Results clearly showed that the CK locations could greatly affect the evaluation of whether the difference in the wheat grain Cd concentration between treatments and CK was significant. There was an insignificant difference in the wheat grain Cd concentration between the treatment and the adjacent CK replicates. Although soil Se application at 2 mg kg-1and foliar Se application at 4 mg L-1significantly increased the grain Se concentration as compared with the adjacent CK replicates, they still could not reduce the Cd concentration in wheat grains. However, when compared to the CK replicates that had the highest grain Cd concentration, foliar and soil applications of Se could significantly reduce the wheat grain Cd concentration by 47.7% and 41.3%–46.1%, respectively. No matter which CK replicates were selected, the application of Fe-based biochar had no significant impact on Cd accumulation in wheat grains, and there was no significant difference in diethylenetriaminepentaacetic acid-Cd concentration between the Fe-based biochar treatment and adjacent CK replicates. In conclusion, applying Fe-based biochar and Se in the field could not reduce the Cd accumulation in wheat grains in Cd-contaminated weakly alkaline soils.

关键词： field experiment foliar Se application Se accumulation soil Cd heterogeneity toxic metal wheat Cd

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Kinetics and mechanisms of non-radically and radically induced degradation of bisphenol A in a peroxymonosulfate-chloride system

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Environmental Science and Ecotechnology 2024年第6期22卷 191-197页

作者： Zhao Song Yu Zhang Yanhu Yang Yidi Chen Nanqi Ren Xiaoguang Duan State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen518055PR China School of Materials and Environmental Engineering Shenzhen Polytechnic UniversityShenzhen518055PR China School of Chemical Engineering The University of AdelaideAdelaideSA5005Australia

Bisphenol A,a hazardous endocrine disruptor,poses significant environmental and human health threats,demanding efficient removal *** biological methods struggle to treat BPA wastewater with high chloride(Cl^(-))levels due to the toxicity of high Cl^(-)to *** persulfate-based advanced oxidation processes(PS-AOPs)have shown promise in removing BPA from high Cl^(-)wastewater,their widespread application is always limited by the high energy and chemical usage *** we show that peroxymonosulfate(PMS)degrades BPA in situ under high Cl^(-)*** was completely removed in 30 min with 0.3 mM PMS and 60 mM Cl^(-).Non-radical reactive species,notably free chlorine species,including dissolved Cl_(2)(l),HClO,and ClO−dominate the removal of BPA at temperatures ranging from 15 to 60℃.Besides,free radicals,including•OH and Cl_(2)^(•−),contribute minimally to BPA removal at 60°*** on the elementary kinetic models,the production rate constant of Cl_(2)(l)(32.5 M^(−1) s^(−1))is much higher than HClO(6.5×10^(−4) M^(−1) s^(−1)),and its degradation rate with BPA(2×10^(7) M^(−1) s^(−1))is also much faster than HClO(18 M^(−1) s^(−1)).Furthermore,the degradation of BPA by Cl_(2)(l)and HClO were enlarged by 10-and 18-fold at 60℃ compared to room temperature,suggesting waste heat utilization can enhance treatment ***,this research provides valuable insights into the effectiveness of direct PMS introduction for removing organic micropollutants from high Cl^(-)*** further underscores the critical kinetics and mechanisms within the PMS/Cl⁻system,presenting a cost-effective and environmentally sustainable alternative for wastewater treatment.

关键词： BPA removal Saline wastewater Peroxymonosulfate Free chlorine Kinetic model

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Geographical Distribution of Atmospheric Nitrogen Deposition in China and Its Response to Emission control Policy

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Chinese Geographical Science 2024年第6期34卷 1017-1031页

作者： WEN Zhang YU Ziyin SI Ruotong XU Wen WANG Kai LIU Lei TANG Aohan ZHANG Fusuo KEITH Goulding LIU Xuejun State Key Laboratory of Nutrient Use and Management(SKL-NUM) College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijing 100193China State Environmental Protection Key Laboratory of Environmental Pollution and Greenhouse Gases Co-control Chinese Academy of Environmental PlanningBejing 100041China Sustainable Soils and Crops Rothamsted ResearchHarpenden AL52JOUK College of Resources and Environment Yunnan Agricultural UniversityKunming 650201China

Atmospheric nitrogen(N)deposition has experienced significant change because of anthropogenic emissions,thereby exerting a pronounced impact on global ecosystem *** the rapid development of industry and agriculture and the swift expansion of urban areas in China since the 1980s,reactive nitrogen(Nr)emissions and N deposition have substantially *** pursuit of im-proving air quality,China has implemented a series of environmental protection policies and undertaken diverse measures to reduce pol-lutant *** paper is a review of multivariate data sources of atmospheric N deposition based on the results of literature from 1980 to 2023,and the original data from 1980 to 2020 are summarized,counted and *** main findings are as follows:1)the annual average atmospheric N deposition ranged from approximately 20-40 kg/(ha·yr),with the variability primarily linked to different assessment methods;2)regional disparities were evident in the spatial distribution of N deposition,with elevated values concentrated in areas with intense Nr emissions;3)atmospheric N deposition significantly declined after 2010,particularly the deposition of oxidized N,while reduced N deposition remained *** results reflect the effects of China's serious control policies on nitrogen oxide(NO.)emissions and strengthen the importance of agricultural NH3 emission *** study contributes to a comprehensive understanding of the N dynamics in the emission-deposition process,and provides a scientific foundation for the research of environmental protection,climate change,and sustainable development.

关键词： nitrogen deposition emission-deposition relationship reactive nitrogen hotspots emission control policy China

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A study on singlet oxygen generation for tetracycline degradation via modulating the size ofα-Fe_(2)O_(3)nanoparticle anchored on g-C_(3)N_(4) nanotube photocatalyst

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Nano Research 2023年第2期16卷 2236-2244页

作者： Hongjie Zhu Minghui Li Luning Zou Youyou Hu Hongguo Hao Jianmin Dou Junjie Mao Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Gaotang liguo chemical plant Liaocheng 252059China

Photocatalysis is considered as an effective technique for mitigating ecological risks posed by residual tetracycline(TC).To improve the efficiency of this technique,it is necessary to enable photocatalysts to produce highly reactive species,such as singlet oxygen(1O2).However,due to the high activation energy of 1O2,photocatalysts can hardly produce 1O2 without assistance from external ***,we find that the size-reducedα-Fe_(2)O_(3)nanoparticles(~4 nm)that anchored on g-C_(3)N_(4)nanotube(α-Fe_(2)O_(3)@CNNT)can spontaneously generate ^(1)O_(2) for degradation of *** comparison,only hydroxyl radical(·OH)can be produced by g-C_(3)N_(4)nanotube loaded with~14 nmα-Fe_(2)O_(3)nanoparticles(α-Fe_(2)O_(3)/CNNT).Owing to the high reactivity of the ^(1)O_(2) species,the photocatalytic degradation rate(Kapp)of TC withα-Fe_(2)O_(3)@CNNT(0.056 min^(−1))was 1.8 times higher than that ofα-Fe_(2)O_(3)/*** experimental results and theoretical calculations suggested that reducing the size ofα-Fe_(2)O_(3)nanoparticles anchored on g-C_(3)N_(4)nanotube decreased the surface electron density ofα-Fe_(2)O_(3),which induces the generation of high-valent Fe(IV)active sites overα-Fe_(2)O_(3)@CNNT and turns the degradation pathway into a unique ^(1)O_(2) dominated *** study provides a new insight on the generation of ^(1)O_(2) for effective degradation of environmental pollutant.

关键词： singlet oxygen degradation pathway high-valent Fe(IV) tetracycline degradation

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Study on the Morphological Structure Characteristics of the Modified Preparation Fe-N/BC Catalysts 6

Study on the Morphological Structure Characteristics of the ...

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2024 6th International Conference on Advanced Materials and Ecological Environment, AMEE 2024

作者： Yang, Yang Zhou, Ting Du, Tianxing Dong, Wenyi Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Guangdong Shenzhen518055 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Guangdong Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Heilongjiang Harbin150090 China

In this study, the citric acid iron and melamine was used to modify the selected biomass, preparing Fe-N/BC iron-nitrogen co-doped biochar catalyst. The BC, N/BC, and Fe-N/BC were characterized by SEM, XRD, FTIR, Raman, XPS, etc., to research the aspects of micromorphology, crystal structure, surface functional group types, and element composition. The results showed that Fe and N elements could be doped into the biochar successfully, making the particle size of Fe-N/BC smaller than that of BC, possessing a bigger surface area with a more abundant pore structure. Additionally, the graphitization degree of Fe-N/BC was enhanced, introducing active sites including pyridinic nitrogen, graphitic nitrogen, and Fe-Nx, enhancing the catalytic activity and electron transfer performance of the catalyst, enabling Fe-N/BC to simultaneously act on catalytic reduction and catalytic oxidation systems. © Published under licence by IOP Publishing Ltd.

关键词： Catalytic oxidation

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Optimization on the Preparation Conditions of Fe-N/BC Catalyst and its pollution Removal Efficiency 6

Optimization on the Preparation Conditions of Fe-N/BC Cataly...

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2024 6th International Conference on Advanced Materials and Ecological Environment, AMEE 2024

作者： Zhou, Ting Yang, Yang Du, Tianxing Dong, Wenyi Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Guangdong Shenzhen518055 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Guangdong Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Heilongjiang Harbin150090 China

This study was aimed to optimize the preparation conditions of Fe-N/BC catalyst. Citric acid iron and melamine was used to co-doped modified selected biomass, optimized factors included biomass type, acid washing time, iron-nitrogen doping amount and pyrolysis temperature, with nitrobenzene as the targeted degradation object. The optimal preparation conditions for Fe-N/BC iron-nitrogen co-doped biochar catalyst were determined. The results showed that using onion as the biomass, after 8 hours of acid washing, immersed in an ultrasonic solution of citric acid iron with a concentration of 8 g/L for 30 minutes, followed by adding melamine at a doping ratio of 5 g/g biomass and another 30 minutes of ultrasonication, centrifuged, water washed, and dried, then pyrolyzed at 900°C under N2 atmosphere for 1 hour. The obtained Fe-N/BC iron-nitrogen co-doped biochar catalyst exhibited the best removal efficiency for nitrobenzene in a catalytic reduction system, with a removal rate of 96.6% after 15 minutes of reaction. © Published under licence by IOP Publishing Ltd.

关键词： Semiconductor doping

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Degradation Kinetics of Nitrobenzene and Aniline by Fe-N/BC Redox System 6

Degradation Kinetics of Nitrobenzene and Aniline by Fe-N/BC ...

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2024 6th International Conference on Advanced Materials and Ecological Environment, AMEE 2024

This study was aimed to analysis the degradation kinetics of nitrobenzene and aniline by the Fe-N/BC redox system. Factors such as the initial pH of the solution, PMS/NaBH4 concentrations, and pollutant concentrations were investigated to explore the variations in pollutant degradation rates in the system. The results indicated that the Fe-N/BC-catalyzed NaBH4 reduction of nitrobenzene followed first-order kinetics, while the Fe-N/BC-catalyzed PMS oxidation of aniline followed pseudo-first-order kinetics. When the pH was alkaline, the reaction was inhibited. Increasing the addition of NaBH4 and PMS from 0.05 to 0.5 g/L resulted in the reaction rate constants for nitrobenzene and aniline increasing from 0.115, 0.120 min-1 to 0.743, 0.354 min-1, respectively. As the pollutant concentration gradually rose from 2 to 50 mg/L, the reactions were inhibited, with the reaction kinetics for nitrobenzene and aniline decreasing from 0.348, 0.288 min-1 to 0.147, 0.091 min-1, respectively. © Published under licence by IOP Publishing Ltd.

关键词： Nitrobenzene

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The effects of Cu-phenanthrene co-contamination on adsorption-desorption behaviors of phenanthrene in soils

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Chemosphere 2024年 349卷 140954页

作者： Li, Mengting Chen, Chuze Zhang, Wei Cao, Liu Zhang, Xueqi Wang, Yuting Xian, Qiming State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants in the environment, which are teratogenic, carcinogenic, and mutagenic. Co-contamination of PAHs and heavy metal commonly exists in soil. In this study, 20 types of soils with different properties in China were collected and comprehensively characterized. Phenanthrene (Phe) and Cu (II) were selected as representatives of PAHs and heavy metals, respectively. The adsorption-desorption behaviors of Phe under Phe contamination and Cu (II)-Phe co-contamination in 20 types of soils were studied. The adsorption-desorption behaviors of Phe in 20 types of soils varied greatly, and adsorption of Phe in the soils followed both linear partitioning and nonlinear surface adsorption. Soil organic matter (SOM) plays an important role in the adsorption-desorption behavior of Phe. When the concentrations of Phe were >50 μg/L, soft carbon (SC) fraction of SOM not black carbon (BC) contributed more to the adsorption of Phe. Soil dissolved organic matter (DOM), especially fulvic acid and humic acid fractions, contributes to the adsorption of Phe. Under the effect of Cu (II) (60 mg/L in solution), the adsorption capacity of soil for Phe increased, which possibly resulted from lowered pH, the existence of the cation-π bonding and the "bonding bridge" effect. The systematic investigation of adsorption-desorption behaviors of Phe in soils under heavy metal-PAHs co-contamination will provide a scientific basis for the calculation of soil environmental capacity in the future. © 2023 Elsevier Ltd

关键词： Soils

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Green innovation unleashed:Harnessing tungsten-based nanomaterials for catalyzing solar-driven carbon dioxide conversion

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Chinese Chemical Letters 2025年第2期36卷 108-117页

作者： Weidan Meng Yanbo Zhou Yi 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 Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Carbon dioxide photocatalytic reduction (CO_(2)-PR) is an efficient method for controlling CO_(2)emissions and generating cleaner energy while mitigating global *** oxides (WxOy) have attracted considerable attention for CO_(2)-PR due to their excellent spectral ***,comprehensive reviews are lacking on the use of WxOyfor CO_(2)-***,this review provides a detailed summary of t research progress made with WxOy-based catalysts in CO_(2)-*** also explains the fundamental principles of CO_(2)-PR and evaluates key performance indicators that affect the activity of WxOy-based photocatalysts,including yield,selectivity,stability,and apparent quantum ***,this review explores opportunities for synthesizing high-performance WxOy-based photocatalysts and highlights their potential for the green preparation of C1/C2 products through CO_(2)-*** innovative strategies aim to address the challenges and pressures associated with energy and environmental issues,particularly by enhancing artificial photosynthesis efficiency.

关键词： Carbon dioxide photoreduction Tungsten-based nanocatalyst Mechanism Performance evaluation Selectivity

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Optimized preparation of Ni-Febm bimetallic particles by ball milling NiSO4 and iron powder for efficient removal of triclosan

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Chemosphere 2024年 360卷 142359页

作者： Zhou, Bingnan Fan, Bo Gong, Zhimin Shao, Shuai Zhou, Dongmei Gao, Shixiang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The excessive usage and emissions of triclosan (TCS) pose a serious threat to aquatic environments. Iron-based bimetallic particles (Pd/Fe, Ni/Fe, and Cu/Fe, etc.) were widely used for the degradation of chlorophenol pollutants. This study proposed a novel synthesis method for the preparation of Ni/Fe bimetallic particles (Ni-Febm) by ball milling microscale zero valent iron ZVI (mZVI) and NiSO4. Ball-milling conditions such as ball-milling time, ball-milling speed and ball-to-powder ratio were optimized to prepare high activity Ni-Febm bimetallic particles. During the ball-milling process, Ni2+ was reduced to Ni0 and formed a coupled structure with ZVI. The amount of Ni0 on ZVI significantly affected the activity of Ni-Febm bimetallic particles. The highest activity Ni-Febm bimetallic particles with Ni/Fe ratio of 0.03 were synthesized under optimized conditions, which could remove 86.56% of TCS (10 μM) in aerobic aqueous solution within 60 min. In addition, higher particle dosage, lower pH condition and higher reaction temperature were more conducive for TCS degradation. The higher corrosion current and lower electron transfer impedance of Ni-Febm bimetallic particles were the main reasons for its high activity. The hydrogen atom (•H) on the surface of Ni-Febm bimetallic particles was mainly contributed to the removal of TCS, as reductive transformation products of TCS were detected by LC-TOF-MS. Notably, a small amount of oxidation products were discovered. The total dechlorination rate of TCS was calculated to be 39.67%. After eight reaction cycles, the residual Ni-Febm bimetallic particles could still degrade 28.34% of TCS within 6 h. Low Ni2+ leaching during reaction indicated that Ni-Febm bimetallic particles did not pose potential environmental risks. The prepared environmental-friendly Ni-Febm bimetallic particles with high activity have great potential in the degradation of other chlorinated organic compounds in wastewater. © 2024 Elsevier Ltd

关键词： Sulfur compounds

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