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Thermal stability of soil organic carbon subjected to water erosion as a function of edaphic factors

International Journal of Sediment Research 2022年第1期37卷 26-36页

作者： Zhongwu Li Linhui Xiao Chuxiong Deng Zaijian Yuan Chen Liang Qian Xiong Zeting Li Xiaodong Nie College of Resources and Environmental Science Hunan Normal University Guangdong Engineering Center of Non-point Source Pollution Control Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Guangdong Institute of Eco-environmental Science & Technology Guangdong Academy of Sciences National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China

The stability of soil organic carbon （SOC）,as it relates to resistance to decomposition,is important for greenhouse gas emission and climate ***,the SOC stabilization and its related influencing factors subjected to water erosion remain *** objective of the current study was to determine the SOC stability under long-term water erosion and to investigate the link between SOC stability and edaphic *** samples from eroded,depositional,and control sites in a closed watershed in subtropical China were *** SOC concentration,carbon functional groups,soil physicochemical properties,and thermal stability of SOC were *** study results showed that the primary component of the SOC functional groups was O-alkyl carbon （reached 40%）,and its proportion has no significant difference among different *** TG-T50（the temperature at which 50%of the soil organic matter is lost） values indicated that the SOC thermal stability in the eroded topsoil was higher than that of the deposited *** carbon functional groups were lack of relation with SOC thermal stability（p>0.05）.However,the TG-T50was significantly positively correlated with the cation exchange capacity and silt,but remarkably negatively correlated with SOC,dissolved organic carbon,total nitrogen,sand,clay,p H,aluminum,specific surface area,and iron *** results indicated that the edaphic factors,which were strongly affected by micro-environment,are the main factors affecting thermal stability of organic *** SOC stabilization under the effects of long-term water erosion should be addressed from the perspective of the ecosystem.

关键词： Soil erosion Soil organic matter Thermogravimetry Preservation Stability

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U(VI) removal by zerovalent manganese modified corn straw biochar in acidic wastewater: Efficiency, characteristics and mechanism

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Chemosphere 2025年 373卷 144163页

作者： Zeng, Taotao Fu, Yusong Yang, Min Deng, Qiqi Chen, Shengbin Liu, Yingjiu Li, Jun Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology University of South China Hunan Hengyang421001 China Shenzheng518055 China Hunan Vch Environment Technology Co. Ltd Changsha410014 China College of Environment and Ecology Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment Ministry of Education Chongqing University Chongqing400045 China

The chemical and radiological toxicity of uranium can present a significant risk to both human health and environmental safety. Thus, ZVMn-BC was synthesized through borohydride reduction aimed at investigating its performance in removing U(VI) in acidic environment (pH = 3). Several batch experiments were conducted to assess the sorption capability under various operational conditions and the relevant experimental data were investigated by kinetics, isotherms and thermodynamic equations. ZVMn-BC exhibited excellent resistance to interference and showed a superiority on U(VI) removal over zerovalent manganese (ZVMn) and corn straw biochar (BC). Under condition of pH 3, and ambient temperature of 303 K with 0.4 g/L of adsorbent, ZVMn-BC exhibited a theoretical sorption quantity of 274.78 mg/g. The sorption process was spontaneous and endothermic, primarily relying on chemical adsorption. The interaction mechanism involved electrostatic interaction, hydrolysis precipitation, complexation, and redox reactions. This study verified that ZVMn-BC exhibits effective performance for U(VI) eliminating in acidic wastewater. © 2025 Elsevier Ltd

关键词： Uranium compounds

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Palladium-catalyzed alkynylative[5+1]carboannulation of 1,3-diarylprop-2-yn-1-yl acetates with terminal alkynes enabled by C-H functionalization

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Organic Chemistry Frontiers 2022年第5期9卷 1389-1394页

作者： Jiang-Xi Yu Li-Jun Wu Zhi-Qiang Wang Zhi-Feng Xu Jin-Heng Li Key Laboratory of Functional Meta-Organic Compounds of Hunan Province Key Laboratory of Functional Organometallic Materials(University of Hunan Province)Hengyang Normal UniversityHengyang 421008China College of Sciences Central South University of Forestry and TechnologyChangsha410004China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiangHenan 475004China

A new method for the synthesis of 3-ethynyl-1-methylene-1,2-dihydronaphthalenes via copper-pro-moted palladium-catalyzed intermolecular alkynylative[5+1]carboannulation of 1-arylphenyl-prop-2-yn-1-yl acetates involving C–H functionalization is *** terminal alkyne molecules serve as an alkynylation reagent and a one-carbon unit to enable alkynylative[5+1]carboannulation with excellent selectivity control,broad substrate scope and good tolerance of functional groups.

关键词： catalyzed Palladium palladium

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3D dahlia-like NiAl-LDH/CdS heterosystem coordinating with 2D/2D interface for efficient and selective conversion of CO_(2)

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Chinese Chemical Letters 2022年第4期33卷 2111-2116页

作者： Xiaoyue Zhang Yong Yang Lijun Xiong Tianyu Wang Zheng Tang Panjie Li Nan Yin Aiwu Sun Jinyou Shen Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Soft Chemistry and Functional Materials Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Faculty of Chemical Engineering Huaiyin Institute of TechnologyHuaiyin 223001China

Developing photocatalyst with high activity,superior stability and prominent selectivity for CO_(2)conversion is of great importance for the target of carbon ***,3 D dahlia-like NiAl-LDH/CdS heterosystem is developed through in-situ decoration of exfoliated CdS nanosheets on the scaffold of NiAl-LDH and the on-spot *** formation of a hierarchical architecture collaborating with well-defined 2 D/2 D interfacial interaction is constructed by optimizing the ratio of CdS integrated in the formation of the *** light-harvesting capacity of NiAl-LDH/CdS is improved by this unique scaffold,and the charge transfer between NiAl-LDH and CdS is effectively facilitated by virtue of the unique 2 D/2 D *** a result,the 3 D hierarchical NiAl-LDH/CdS heterosystem presents 12.45μmol g^(-1)h^(-1)of CO production(3.3 and 1.6 folds of pristine NiAl-LDH and CdS) with 96% selectivity and superior *** 3 D hierarchical design collaborating with 2 D/2 D interfacial interaction provides a new avenue to develop ideal catalysts for artificial photosynthesis.

关键词： Photocatalysis CdS Photocorrosion NiAl-LDH CO_(2)Conversion

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Mechanism of iron on the intestinal epithelium development in suckling piglets

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Science China(Life Sciences) 2023年第9期66卷 2070-2085页

作者： Lanmei Yin Yitong Zhang Jun Li Jing Zhou Qiye Wang Jing Huang Jianzhong Li Huansheng Yang Hunan International Joint Laboratory of Animal Intestinal Ecology and Health Laboratory of Animal Nutrition and Human HealthCollege of Life SciencesHunan Normal UniversityChangsha 410081China Key Laboratory of Agro-ecological Processes in Subtropical Region Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin 300308China State Key Laboratory of Food Safety Technology for Meat Products Yinxiang GroupFujian Aonong BiologicaI Science and Technology Group Co.Ltd.Key Laboratory of Swine Nutrition and Feed Science of Fujian ProvinceZhangzhou 363000China

This study aimed to investigate the mechanism of iron on intestinal epithelium development of suckling piglets. Compared with newborn piglets, 7-day-old and 21-day-old piglets showed changes in the morphology of the jejunum, increased proliferation,differentiated epithelial cells, and expanded enteroids. Intestinal epithelium maturation markers and iron metabolism genes were significantly changed. These results suggest that lactation is a critical stage in intestinal epithelial development, accompanied by changes in iron metabolism. In addition, deferoxamine(DFO) treatment inhibited the activity of intestinal organoids at passage 4(P4) of 0-day-old piglets, but no significant difference was observed in epithelial maturation markers at passage 1(P1) and P4,and only argininosuccinate synthetase 1(Ass1) and β-galactosidase(Gleb) were up-regulated at passage 7(P7). These results in vitro show that iron deficiency may not directly affect intestinal epithelium development through intestinal stem cells(ISCs). The iron supplementation significantly down-regulated the m RNA expression of interleukin-22 receptor subunit alpha-2(IL-22RA2)in the jejunum of piglets. Furthermore, the m RNA expression of IL-22 in 7-day-old piglets was significantly higher than that in0-day-old piglets. Adult epithelial markers were significantly up-regulated in organoids treated with recombinant murine cytokine IL-22. Thus, IL-22 may play a key role in iron-affecting intestinal epithelium development.

关键词： iron suckling piglets intestinal epithelium development interleukin-22

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Formation mechanism of electroless plating nickel-based composite coating on highly active rare earth magnesium alloys and its corrosion resistance and adhesion performance

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Journal of Central South University 2024年第10期31卷 3517-3531页

作者： WANG Bo LI Jia-wei XIE Zhi-hui LIU Kang XU Tao YU Gang College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410012China Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province China West Normal UniversityNanchong 637002China Central South University of Forestry and Technology Changsha 410004China

The process of preparing anodic oxide film containing active sites and electroless nickel plating on highly active rare earth magnesium alloy was *** formation mechanism of electroless nickel plating on active anodic oxide film and the structure and properties of the composite coating were studied by several surface and electrochemical *** results showed that Ag nanograins with an average size of 10 nm were embedded into the anodic oxide film with pores of 0.1−2μ*** nanoparticles provided a catalytic site for the deposition of Ni-B alloy,and the Ni crystal nucleus was first grown in horizontal mode and then in cylindrical *** corrosion potential of the composite coating increased by 1.37 V and the corrosion current reduced two orders of magnitude due to the subsequent deposition of Ni-P *** high corrosion resistance was attributed to the misaligning of these micro defects in the three different layers and the amorphous structure of the Ni-P alloy in the outer *** findings provide a new idea for electroless nickel plating on anodic oxide film.

关键词： rare earth magnesium alloy electroless nickel plating composite coating Ag+activation active anodic oxidation film growth mechanism

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Cupriavidus B-7 immobilized biochar:an effective solution for Cd accumulation alleviation and growth promotion in pakchoi(Brassica Chinensis L.)

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Biochar 2024年第1期6卷 804-817页

作者： Yefang Sun Da Ouyang Yiming Cai Ting Guo Mei Li Xinlin Zhao Qichun Zhang Ruihuan Chen Fangzhen Li Xiujuan Wen Lu Xie Haibo Zhang Sino-Spain Joint Laboratory for Agricultural Environment Emerging Contaminants of Zhejiang Province School of Environment and ResourcesZhejiang Agriculture and Forestry UniversityHangzhou 311300China. Shaoxing Academy of Agricultural Sciences Shaoxing 312003China. Key Laboratory of Environmental Pollution Control Technology Research of Zhejiang Province Eco-Environmental Science Research and Design Institute of Zhejiang ProvinceHangzhou 310007China. Institute of Bast Fiber Crops Chinese Academy of Agricultural SciencesChangsha 410205China. School of Environment and Resources Zhejiang UniversityHangzhou 310007China. College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China.

Cd contamination,especially in farmland soil,can pose serious threats to human health as well as ecological *** is an important strategy for agricultural soil Cd *** this study,a Cd-resistant strain(Cupriavi-dus B-7)was isolated and loaded onto cow manure(CDB),rice straw(RSB)and pine wood biochar(PB)to investigate its effects on Cd stabilization by a 60-day pot *** indicated that the Cupriavidus B-7-loaded biochar(labelled as CDBB,PBB and RSBB)reduced the CaCl_(2)-extractable Cd by 43.06-59.78%,which was significantly superior to individual applications of Cupriavidus B-7 and ***,the soil physicochemical properties,urease,catalase and phosphatase activities were improved,indicating improved soil ***,dry weights of pakchoi’s shoot and root were increased by 938.9-1230.9%and 149.1-281.2%,respectively,by applying CDBB,PBB and ***,the Cd accumulation in pakchoi shoots decreased by 38.06-50.75%.Notably,the RSBB exhibited an optimal performance on pakchoi growth promotion and Cd accumulation *** structural equation model indicated the synergistic effect on pakchoi growth promotion and Cd accumulation decreased between biochar and Cupriavidus *** research provides some new insights into the development of strategies for green and sustainable remediation of Cd-contaminated soil.

关键词： Biochar loaded bacteria Bioremediation Bioavailability Cadmium Uptake

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Electric field-enhanced heterogeneous catalytic ozonation (EHCO) process for sulfadiazine removal: The role of cathodic reduction

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Chemosphere 2024年 351卷 141226页

作者： Yin, Xu Zhang, Jie Chen, Siru Li, Wei Zhu, Hongwei Wei, Kajia Zhang, Yonghao Chen, Haoming Han, Weiqing Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Jiangsu Province Nanjing210094 China School of Environmental Science and Engineering Yancheng Institute of Technology Yancheng224051 China

In this work, an electric field-enhanced heterogeneous catalytic ozonation (EHCO) was systematically investigated using a prepared FeOx/PAC catalyst. The EHCO process exhibited high sulfadiazine (SDZ) and TOC removal efficiency compared with electrocatalysis (EC) and heterogeneous catalytic ozonation (HCO) process. Almost 100% of SDZ was removed within 2 min, and the TOC removal reached approximately 85% within 60 min. Quenching experiments and EPR analysis suggested that the prominent SDZ and TOC removal performance is supported by the enhanced ·OH generation ability. Further study proved that H2O2 formed by O2 electrochemical reduction, peroxone reaction and electrochemical reduction of ozone contributed to improving ·OH generation. Furthermore, the EHCO system showed satisfactory stability and recyclability compared to conventional HCO systems, and the SDZ and TOC removal rates were maintained at ≥95% and ≥70% in 16 consecutive recycles, respectively. Meanwhile, XPS analysis and Boehm's titration for the FeOx/PAC catalyst used in HCO and EHCO process confirmed that the external electron supply could restrain the oxidation of surface functional groups of PAC and maintain a balance of the Fe(II)/Fe(III) ratio, which proved the critical role of cathode reduction in catalyst in situ regeneration during long consecutive recycles. In addition, the EHCO system could achieve more than 80% SDZ removal within 2 min in different water matrices. These results confirmed that the EHCO process has a wide application perspective for refractory organics removal in actual wastewater. © 2024 Elsevier Ltd

关键词： Catalysts

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Mechanistic insights to sorptive removal of four sulfonamide antibiotics from water using magnetite-functionalized biochar

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Biochar 2023年第1期5卷 1377-1388页

作者： Shanshan Bai Yaolu Zhou Mingrong Qian Jun Xia Zhiqiang Sun Yujiao Wang Xiaochen Huang Shishu Zhu Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province Interdisciplinary Research AcademyZhejiang Shuren UniversityHangzhou 310015People’s Republic of China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090People’s Republic of China State Key Lab of Biocontrol Guangdong Provincial Key Laboratory of Plant ResourcesSchool of AgricultureShenzhen Campus of Sun Yat-Sen UniversityShenzhen 518107People’s Republic of China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006People’s Republic of China

Magnetite-functionalized biochar(MBC)is a promising engineered material for remediation of antibiotic-contaminated ***,sorption mechanisms of ionizable organic compounds such as sulfonamide antibiotics(SAs)on MBC are still *** study employed four representative SAs including sulfamethazine(SMT),sulfamerazine(SMR),sulfadiazine(SDZ),and sulfamethoxazole(SMX),to compare the difference in sorption on *** showed that the sorption capacities and affinities of the four SAs varied with their substituents,hydrophobic properties,and dissociation constants(pKa).Synergistic effect during co-pyrolysis with Fe^(3+)enhanced the sorption performance of MBC towards SAs compared to original *** methods confirmed structural changes of MBC such as the variance in oxygen-containing groups and defective/graphitized *** of modeling pH-dependent sorption revealed that H-bonding orπ-bond assisted H-bonding determined the sorption affinities and capacities of *** particular,the SAs with lower pKa were thermodynamically favorable to form H-bonding with MBC via proton exchange with water *** calculation results quantified the contributions of H-bonding strengths and found that the energies of H-bonding were correlated with affinities of ***,contributions of oxygencontaining groups instead of minerals dominated the H-bonding *** insights from this study can be valuable in exploring engineered BC composites for practical application in field remediation.

关键词： Biochar Antibiotics Sorption capacity Synergistic effect Quantum calculation

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A bibliographic study reviewing the last decade of hydrochar in environmental application:history,status quo,and trending research paths

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Biochar 2023年第1期5卷 231-257页

作者： Junxia Huang Yanfang Feng Huifang Xie Ping Wu Minli Wang Bingyu Wang Qiang Zhang Shicheng Zhang Zhengang Liu Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China Centre for Agricultural Resources Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China Faculty of Civil Engineering and Mechanics Kunming University of Science and TechnologyKunming 650500China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Hydrothermal carbonization(HTC)technology has increasingly been considered for biomass conversion applications because of its economic and environmental *** an HTC conversion product,hydrochar has been widely used in the agricultural and environmental fields for decades.A CiteSpace-based system analysis was used for conducting a bibliometric study to understand the state of hydrochar environmental application research from 2011 to *** had a basic understanding of hydrochar between 2011 and 2016 when they discovered hydrochar could apply to agricultural and environmental improvement *** clustering results of the literature published in 2017-2021 showed that soil quality and plant growth were the major research topics,followed by carbon capture and greenhouse gas emissions,organic pollutant removal,and heavy metal adsorption and its *** review also pointed out the challenge and perspective for hydrochar research and application,namely:(1)the environmental effects of hydrochar on soils need to be clarified in terms of the scope and conditions;(2)the influence of soil microorganisms needs to be investigated to illustrate the impact of hydrochar on greenhouse gas emissions;(3)combined heavy metal and organic contaminant sorption experiments for hydrochar need to be conducted for large-scale applications;(4)more research needs to be conducted to reveal the economic benefits of hydrochar and the coupling of hydrochar with anaerobic digestion *** review suggested that it would be valuable to create a database that contains detailed information on how hydrochar got from different sources,and different preparation conditions can be applied in the environmental field.

关键词： Hydrochar Environmental applications Research hotspots Bibliometrics CiteSpace

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