高砷煤矿废水灌溉土壤中砷的垂直分布特征  

Vertical Distribution Characteristics of Arsenic in the Soils Irrigated by High-arsenic Coal Drainage

作　　者：刘宏 吴攀[2] 

机构地区：[1]中国航天科工集团〇六一基地环境监测站,贵州遵义563000 [2]贵州大学资源与环境工程学院,贵州贵阳550003

出　　处：《干旱环境监测》2014年第2期55-59,65,共6页Arid Environmental Monitoring

基　　金：国家自然科学基金项目"高砷煤矿区环境中碳酸盐岩制约下As的迁移与转化机理研究"(40663001);973计划前期研究专项"喀斯特矿山环境演变与生态安全评价及预警方法的基础研究"(2008CB417209)

摘　　要：本研究在贵州兴仁县交乐村高砷煤矿废水灌溉区采集了55个土壤剖面（0 ～ 85 cm）,以分析研究区内土壤砷的垂直变化趋势.结果表明,研究区内土壤砷的垂直分布极为广泛,在85 cm深的剖面砷含量为19.067 ～ 179.62mg/kg,均高于全国平均水平.同时还发现,距离污染源越近土壤剖面中的砷含量,无论是表层还是下层均高于未受或少受煤矿废水灌溉土壤中的砷含量.农田土壤中高含量砷的来源,除受当地高砷的地质背景影响外,高砷煤矿废水的灌溉也是重要的因素,砷在研究区内的垂直变化没有呈现出统一的规律.In this paper, uptrend of arsenic vertical distributions in 55 soil profiles （0 ~ 85 cm） that were irrigated by high - arsenic coal drainage was analyzed. The results indicated the distributions were abroad in the study area and the level of arsenic content was from 19. 067 to 179.62 mg/kg in the deep for 85 cm. Simultaneity the concentrations of arsenic nearby the source of pollution is higher than that not or small polluted by the coal drainage. Irrigated by coal drainage has caused the transformation of arsenic from top to bottom in the soils and became an important factor for accumulation of arsenic in the bottom soils.

关 键 词：高砷煤 灌溉 土壤剖面 砷 

分 类 号：X833[环境科学与工程—环境工程]