岸滤系统氧化还原作用对地下水中钒形态变化的影响机理

Riverbank filtration for improving water quality is important to protect drinking water safety. Biogeochemical redox processes of riverbank filtration is international research frontier, therefore, it is significant that to research the impact characteristics and mechanism of redox processes in riverbank filtration on vanadium migration and transformation in groundwater..Taking typical riverine groundwater sources along Anbang River (a tributary of Songhua River) for examples, this project is：(1) to investigate environmental hydrogeological characteristics, source and distribution of vanadium in riverine watersheds along Anbang River ; (2) to delineate the scale and detect the structure of redox transient zone by using of hydrogeological survey and geophysical exploration; (3) to reveal the distribution and speciation of vanadium in river water, river sediment, and groundwater; (4) to study the influence of natural organic matters, Fe, and Mn and their redox processes on vanadium distribution and speciation in groundwater; (5) to find out the mechanism of the influences of the redox of natural organic matters, Fe, and Mn on the migration and transformation of vanadium in groundwater. On the whole, the important objective of this project to reveal the mechanism of the influence of redox processes on biogeochemical behavior of vanadium in groundwater in riverbank filtration..Some key questions will be answered in this project: (1) which forms of vanadium dominated in river, riverine media, and groundwater; (2) what geochemical factors influenced vanadium migration and transformation in groundwater; (3) what redox processes occurred in riverbank filtration system; (4) in molecular scale, how clay minerals, Fe/Mn hydrous oxides, and natural organic matters impacted migration and transformation of vanadium in groundwater..During execution of this project, (1) more than 10 papers will be published in international journals, and more than 10 papers will be published in higher impact factor journal in earth and environmental fields among these papers (total impact factors > 20); (2) 3 persons will take part in international conference and 2 persons will take part in domestic conference; (3) 3 MSc students, 3 PhD students, 1 postdoctorial will graduate by supporting this project.

岸滤傍河取水技术在保障全球水安全中发挥着重要作用，岸滤系统中典型元素的行为是当前研究的热点和前沿，因此开展岸滤系统氧化还原过程对地下水中钒形态变化的影响机理，具有重要的科学意义和应用价值。本项目以松花江一级支流安邦河典型傍河水源地为研究对象，在地下水循环和运动特征研究的基础上，揭示滨岸带河水与地下水的相互作用及其水质响应关系；采用水文地质勘探、地球物理探测等手段圈定岸滤系统氧化还原转换带的结构、范围；查明河水、河床沉积物、含水层中钒的形态分布及变化特征及影响因素；研究Fe、Mn、S、N、有机质等的氧化还原反应对钒迁移转化的影响机理；在此基础上，揭示傍河取水岸滤系统对地下水中钒生物地球化学行为的影响机理。本项目重点解决（1）识别河流-滨岸带-地下水系统影响钒形态分布的地球化学参数；（2）在分子尺度上揭示黏土矿物、铁/锰水合物、天然有机质、微生物等的氧化还原作用对钒形态变化的地球化学化学机理。

岸滤傍河取水技术在保障全球水安全中发挥着重要作用，岸滤系统中典型元素的行为是当前研究的热点和前沿，因此开展岸滤系统氧化还原过程对地下水中钒形态变化的影响机理，具有重要的科学意义和应用价值。该项目选择松嫩平原松花江哈尔滨应急傍河水源地、呼兰河呼兰第二水源地、拉林河五常第二水源地为典型研究对象，在地下水循环和运动特征研究的基础上，揭示滨岸带河水与地下水的相互作用及其水质响应关系；采用水文地质勘探、地球物理探测等手段圈定岸滤系统氧化还原转换带的结构、范围；查明河水、河床沉积物、含水层中钒的形态分布及变化特征及影响因素；研究Fe、Mn、S、N、有机质等的氧化还原反应对钒迁移转化的影响机理；在此基础上，揭示傍河取水岸滤系统对地下水中钒生物地球化学行为的影响机理。该项目执行过程中，以第一标注发表中文核心期刊论文2篇、SCI论文10篇，以第二标注发表SCI论文6篇，以第三标注发表SCI论文6篇，按计划完成了本项目任务。