课题基金基金详情
溶解态三价锰的环境地球化学及其对土壤地下水污染物形态归趋的调控机制研究
结题报告
批准号:
41977266
项目类别:
面上项目
资助金额:
61.0 万元
负责人:
王梓萌
依托单位:
学科分类:
环境地球化学
结题年份:
2023
批准年份:
2019
项目状态:
已结题
项目参与者:
王梓萌
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中文摘要
传统的锰的环境地球化学通常假定溶解态的锰均为Mn(II),而氧化态的锰(+III, +IV)存在于固相矿物中。但是,近年来的各种证据表明溶解态的三价锰在有特定配体存在的环境中可以成为锰的主要形态,并且展示出高活性、高迁移性的地球化学氧化剂的特征。目前,锰的环境地球化学被溶解态三价锰这一团“乌云”所笼罩,它们的产生、化学形态、稳定性、反应活性以及在各种环境介质中的地球化学角色均缺乏一手的数据和系统的研究。通过一套自下而上(Bottom Up)的系统研究方法,本项目计划阐明溶解态三价锰的典型化学形态,定量其氧化还原反应活性,并追踪其在多孔环境介质中的原位生成和消耗的动态规律。集成水化学、电分析和质谱分析,同步辐射光谱以及反应-输运模型等方法,对溶解态三价锰的化学热力学,氧化还原动力学,分子尺度和孔隙尺度的过程机制进行定量的表征,深化对锰环境地球化学循环的科学认识。
英文摘要
Manganese participates in a wide spectrum of biogeochemical processes, exerting major influence on the environmental behaviors of many contaminants even if Mn is only a minor subsurface constituent. Traditional environmental geochemistry of Mn has been largely based on the paradigm that dissolved Mn is exclusively Mn(II) and that higher oxidation states of Mn only exist in solids. However, recent evidences highlighted soluble Mn(III) complexes, stabilized by certain ligands, as reactive and mobile geochemical oxidants. The clearness of the Mn biogeochemistry is at present obscured by the “cloud” of soluble Mn(III) species regarding their environmental occurrence, chemical speciation, redox activity and geochemical roles in conjunction with other subsurface constituents. The involvement of soluble Mn(III) species may challenge the existing paradigm about how Mn mediates subsurface biogeochemical dynamics through underappreciated reaction pathways. We propose a bottom-up fundamental research project to fill the critical knowledge gap about Mn(III) environmental chemistry by elucidating its speciation (stoichiometry with respect to ligands and stability constants), quantifying its redox reactivity (reaction kinetics as oxidants), and tracing its in-situ production and dynamics (from Mn oxides) in simulated subsurface media. We will integrate aqueous analytical techniques, electrochemical and mass spectrometry methods, and synchrotron X-ray spectroscopy to probe into the complicated environmental chemical processes from different aspects and at different scales. This new information about reaction kinetics, porescale dynamics, and molecular-scale mechanisms will be interpreted using quantitative models informed by experimentally-determined chemical speciation. The fundamental knowledge will lay the cornerstone for refined subsurface biogeochemical models of Mn and other contaminants.
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DOI:10.1016/j.jhazmat.2022.130187
发表时间:2022-10
期刊:Journal of hazardous materials
影响因子:13.6
作者:Hongbiao Wen;Z. Pan;Xingxing Wang;Kejian Li;Qihuang Wang;Jinming Luo;Hongbo Fu;Liwu Zhang;Zimeng Wang
通讯作者:Hongbiao Wen;Z. Pan;Xingxing Wang;Kejian Li;Qihuang Wang;Jinming Luo;Hongbo Fu;Liwu Zhang;Zimeng Wang
DOI:10.1016/j.watres.2023.119595
发表时间:2023-01
期刊:Water research
影响因子:12.8
作者:Xingxing Wang;Zhipeng Shu;Haohua He;Ming Zhou;Xiaohang Lu;Jiajia Wang;Liwu Zhang;Z. Pan;Zimeng Wang
通讯作者:Xingxing Wang;Zhipeng Shu;Haohua He;Ming Zhou;Xiaohang Lu;Jiajia Wang;Liwu Zhang;Z. Pan;Zimeng Wang
DOI:10.1021/acs.est.2c04594
发表时间:2022-09
期刊:Environmental science & technology
影响因子:11.4
作者:Zhipeng Shu;Z. Pan;Xingxing Wang;Haohua He;Shuwen Yan;Xiuping Zhu;Weihua Song;Zimeng Wang
通讯作者:Zhipeng Shu;Z. Pan;Xingxing Wang;Haohua He;Shuwen Yan;Xiuping Zhu;Weihua Song;Zimeng Wang
DOI:10.1016/j.gca.2022.06.028
发表时间:2022-06
期刊:Geochimica et Cosmochimica Acta
影响因子:5
作者:Xingxing Wang;Jiajia Wang;Xiaona Lu;M. Zhou;Qihuang Wang;Z. Pan;Naresh Kumar;M. Zhu;Zimeng Wang
通讯作者:Xingxing Wang;Jiajia Wang;Xiaona Lu;M. Zhou;Qihuang Wang;Z. Pan;Naresh Kumar;M. Zhu;Zimeng Wang
DOI:10.1016/j.jhazmat.2024.133557
发表时间:2024-01
期刊:Journal of hazardous materials
影响因子:13.6
作者:Zhipeng Shu;Qiuyao Liu;Enyang Liu;Zezhen Pan;Shuwen Yan;Liwu Zhang;Weihua Song;Zimeng Wang-
通讯作者:Zhipeng Shu;Qiuyao Liu;Enyang Liu;Zezhen Pan;Shuwen Yan;Liwu Zhang;Weihua Song;Zimeng Wang-
氧化还原波动条件下多金属污染土壤生物地球化学过程在团聚体尺度的过程解构
  • 批准号:
    42377402
  • 项目类别:
    面上项目
  • 资助金额:
    49.00万元
  • 批准年份:
    2023
  • 负责人:
    王梓萌
  • 依托单位:
放射性核素的界面吸附:基于元数据建立统一的模型数据库和运算平台
  • 批准号:
    21806021
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    23.5万元
  • 批准年份:
    2018
  • 负责人:
    王梓萌
  • 依托单位:
国内基金
海外基金