硫代砷形态测试分析技术及环境行为特征  

Study on Thioarsenic Species: Analytical Techniques and Their Environmental Behavior

作　　者：童佳荣 单慧媚 刘崇炫 彭三曦[2] 魏鑫 TONG Jiarong;SHAN Huimei;LIU Chongxuan;PENG Sanxi;WEI Xin(Laboratory of Basin and Wetland Eco-restoration, China University of Geosciences, Wuhan 430074, China;School of the Environmental Studies, China University of Geosciences, Wuhan 430074, China;College of Environmental Science and Engineering, Guilin University of Technology, Gnilin 541004, China;China Railway No.4 Survey and Design Group Co., LTD., Wuhan 430074, China)

机构地区：[1]中国地质大学(武汉)盆地水文过程与湿地生态恢复学术创新基地,湖北武汉430074 [2]中国地质大学(武汉)环境学院,湖北武汉430074 [3]桂林理工大学环境科学与工程学院,广西桂林541004 [4]中铁第四勘察设计院集团有限公司,湖北武汉430074

出　　处：《环境科学与技术》2018年第3期156-162,共7页Environmental Science & Technology

基　　金：国家自然科学基金项目:介质非均质性对硫代(亚)砷分布与迁移的影响研究(41502232);国家自然科学基金项目:地下水-地表水相互作用对砷迁移转化的影响和预测(41572228);中国地质大学(武汉)"盆地水文过程与湿地生态恢复学术创新基地"开放课题:高砷地下水中As-S-O形态分布及其吸附/解吸行为研究(BHWER201404(B))

摘　　要：砷的形态分布是影响地下水环境中砷迁移转化行为的关键。最新研究发现硫代砷是富硫高砷地下水中砷的主要存在形态。然而,中国关于高砷地下水中硫代砷形态的定量检测成果有限,现有报道多是对水样进行酸化处理后进行砷酸盐和亚砷酸盐形态分析,这一处理导致砷和硫发生沉淀从而使得硫代砷形态被破坏或被忽略。该文系统对比分析了几种不同硫代砷形态的制备、分离和定量检测技术,总结了硫代砷的形态分布及环境行为特征。未来对高砷地下水污染的研究应着重发展硫代砷形态的测试分析技术,调查硫代砷形态在高砷地下水环境中的地球化学行为特征,并探讨其对传统意义上的(亚)砷酸盐地球化学行为的影响。Distribution of arsenic species has a critical effect upon arsenic fate and transport in groundwater, and present studies indicated that thioarsenic was the main arsenic speciation in high-arsenic groundwater. Current techniques to quantify thioarsenic species in high-arsenic groundwater in China were mostly focused on arsenate and arsenite speciation analysis after acidifying water sample, which were undesirable because it will result in precipitation of As and S and destroy thioarsenic species. The objective of this study was to compare the typical techniques used to quantify different species of thioarsenic, and to summarize the distribution and environmental behavior of thioarsenic species. As a result, the paper stressed the development of analytical techniques of different species of thioarsenic, which would eventually lead to the better characterization of geochemical behavior of thioarsenic species in high arsenic groundwater and better understanding of their impacts on arsenate/arsenite geochemical behavior.

关 键 词：硫代砷 测试分析技术 环境行为 

分 类 号：X830.2[环境科学与工程—环境工程]