奎屯河流域高砷地下水砷含量空间分布异常的影响因素  

Factors Influencing the Abnormal Spatial Distribution of Arsenic Content in Groundwater in Kuitun River Basin

作　　者：宿彦鹏 李巧[1,2] 陶洪飞[1,2] 何雨江[3] 栗现文 马合木江·艾合买提[1,2] 姜有为 鲜虎胜 SU Yan-peng;LI Qiao;TAO Hong-fei;HE Yu-jiang;LI Xian-wen;MAHEMUJIANG Aihemaiti;JIANG You-wei;XIAN Hu-sheng(College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052,China;Xinjiang Key Laboratory of Water Conservancy Project Safety and Water Disaster Prevention and Control, Urumqi 830052, China;Technology Innovation Center on Geothermal and Dry Hot Rock Exploration and Development, Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science, Shijiazhuang 050061, China;College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling 712100, China)

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆农业大学新疆水利工程安全与水灾害防治重点实验室,乌鲁木齐830052 [3]中国地质科学院水文地质环境地质研究所自然资源部地热与干热岩勘查开发技术创新中心,石家庄050061 [4]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《长江科学院院报》2022年第2期43-49,55,共8页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41762018);新疆维吾尔自治区自然科学基金青年基金项目(2016D01B024);“天山青年计划”青年博士科技人才培养项目(2020Q079);2020年度新疆农业大学大学生创新项目。

摘　　要：新疆奎屯河流域是我国地下水受砷影响较为严重的一个区域,为了查明该区地下水中砷的空间分布特征及砷含量异常的原因,于2017年在研究区采集地表水、潜水和承压水样品51组,2019年在典型高砷区采集承压水样品16组,2个钻孔沉积物样品45组。通过地下水及沉积物的测试分析、数理统计等方法对研究区高砷地下水的空间分布特征及砷含量异常的影响因素进行分析,结果表明:水平方向上,砷浓度从南向北逐渐升高,与海拔呈负相关;垂直方向上,高砷地下水主要分布在>80 m深层含水层中。地下水中砷含量空间分布与古地理环境、地形地貌、封闭的地质、干旱的气候等自然地理条件有关;地下水砷含量分布异常主要有3个原因,即高pH值、高HCO_(3)^(-)、低Eh的地下水环境,沉积物的粒径、色度、局部沉积环境,施用含砷农药、化肥的人为活动。研究成果可为奎屯河流域地下水砷富集机制的研究奠定基础。Kuitun River Basin in Xinjiang is an area where groundwater is seriously affected by arsenic.To find out the spatial distribution characteristics of arsenic in groundwater and the causes of abnormal arsenic content in the area,we collected 51 groups of surface water,underflow and confined groundwater samples in the study area in 2017,16 groups of confined groundwater samples and 45 groups of borehole sediment samples in typical high-arsenic-content area in 2019.By test analysis and mathematical statistical analysis on the groundwater and sediment samples,we obtained the spatial distribution characteristics of high-arsenic groundwater in the study area and the influencing factors of abnormal arsenic content.Results manifest that in horizontal direction,arsenic concentration is correlated negatively with topography,increasing gradually from south to north;in vertical direction,high-arsenic groundwater is mainly distributed in aquifers greater than 80 meters deep.The spatial distribution of arsenic content in groundwater is related to natural geographical conditions such as paleogeographic environment,topography,closed geology,and arid climate.The causes of abnormal arsenic content in groundwater are concluded as:groundwater environment with high pH value,high HCO^(-)_(3) concentration and low Eh;particle size,chromaticity,and local deposition environment of sediments;and human activities using arsenic-containing pesticides and fertilizers.

关 键 词：水化学环境 砷 空间分布 影响因素 奎屯河流域 

分 类 号：X523[环境科学与工程—环境工程]