江汉平原高砷地下水系统沉积柱中砷分布研究  

Preliminary Study of the Distribution Profile of Arsenic in Sediment Column of High-arsenic Groundwater System at Jianghan Plain

作　　者：叶恒朋[1] 熊培生[2] 杨泽玉[1] 李明健[2] 杜冬云[1] 周素华[2] 熊倩[1] 赵淑军[2] 

机构地区：[1]中南民族大学化学与材料科学学院/催化材料科学教育部-国家民委重点实验室/武汉市重金属废水处理与回用工程技术研究中心,湖北武汉430074 [2]湖北省疾病预防控制中心地方病防治科,湖北武汉430079

出　　处：《环境科学与技术》2013年第3期24-27,41,共5页Environmental Science & Technology

基　　金：国家自然科学基金(41203056);湖北省自然科学基金(2010CDZ045);武汉市科技攻关计划(201160638173)

摘　　要：研究在江汉平原中部的仙桃市沙湖镇沙湖农场南洪村、洪湖市黄家口镇姚河村钻凿3个深度约为30 m的钻孔,采集不同深度代表性岩土样（单孔内取样间距为2 m）,采用用银盐法测定沉积物样品中砷含量。研究结果表明,该研究区域沉积物中砷含量范围为1.500～17.289mg/kg,与典型的现代松散型沉积物中砷含量相当（5~10 mg/kg）;砷含量最大值均出现在泥土层,最小值均出现在沙层,表明沉积物样品中砷含量与岩性有密切关系。Three boreholes with the depth of 30 m were drilled and collected representative geotechnical samples at different depths（sample spacing within the single-hole 2 m） for laboratory analysis.Arsenic content in the sediment core samples was investigated with DDC-Ag method.Results show that the content of arsenic in the study area is ranged from 1.500 mg/kg to 17.289 mg/kg,which is fairly similar to modern loose sediment arsenic concentration of 5~10 mg/kg.The maximum arsenic content exists in the soil layer,while the minimum arsenic content exists in the sand layer,which indicates that the arsenic content in the sediment samples is closely associated with the lithologic structure.

关 键 词：江汉平原 地下水 沉积柱 砷 

分 类 号：X142[环境科学与工程—环境科学]