广西西江流域土壤Sb含量特征分布与污染评价  

Content distribution of Sb and its pollution assessment in soils of Guangxi Xijiang River Basin

作　　者：杨子杰[1] 宋波[1,2] 王佛鹏 张云霞 庞瑞[1] 李藜 周子阳[1] YANG Zijie;SONG Bo;WANG Fopeng;ZHANG Yunxia;PANG Rui;LI Li;ZHOU Ziyang(College of Environmental Science and Engineering,Guilin University of Technology,Guilin Guangxi 541004;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin Guangxi 541004)

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004

出　　处：《环境污染与防治》2018年第12期1436-1442,1448,共8页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41161056;No.41261082);广西矿冶与环境科学实验中心资助项目(No.KH2012ZD004);广西省科技成果转化与推广计划项目(桂科转1599001-1)

摘　　要：系统分析和评价了广西西江流域土壤Sb含量特征及污染状况。研究结果表明,西江流域土壤Sb跨度大,为0.04～3 495.00mg/kg,上游地区的Sb含量显著高于下游。西江流域土壤Sb的背景值为4.76 mg/kg,显著高于广西Sb背景值(2.12mg/kg);矿区土壤、旱地土壤、水田土壤Sb分别为546.00、6.65、2.38mg/kg,以《土壤环境质量标准》(15618—2008)二级标准为限定值,超标率分别为81.4%、45.2%、15.1%。Sb高值聚类区集中于南丹县的南部、刁江流域上游、都安县北部段、忻城县南部以及宜州市北部,而上游地区的南丹县北部以及下游的黔江、浔江、蒙江主干流流经的地区及象州地区形成明显的低值聚类区;Sb高值区主要集中在刁江流域的南丹县、都安县以及宜州市,流域特征明显;流域土壤样本Sb总体介于无污染至中度污染之间,污染主要分布于河池地区的都安县、河池市以及南丹县,这主要与上游的矿业活动和高背景Sb有关。The soil Sb distribution and its pollution status in Xijiang River Basin of Guangxi were analyzed in this study.Results showed that the Sb in Xijiang River Basin presented a large span with the concentration ranged0.04-3495.00mg/kg.Sb content in upstream was significantly higher than that in downstream.The background value of soil Sb in Xijiang River Basin was4.76mg/kg,which was significantly higher than that of Guangxi(2.12mg/kg).The concentration of Sb in mining soil,dryland soil and paddy soil was546.00,6.65and2.38mg/kg,respectively.According to classⅡof“Environmental quality standard for soils”(GB15618-2008),81.4%,45.2%and15.1%of mining soil,dryland soil and paddy soil exceeded the national standard.The areas with high Sb cluster were distributed in the south of Nandan County,the upper reaches of the Diaojiang River Basin,the northern section of Du’an County,the southern part of Xincheng County and the northern part of Yizhou City.The areas with low Sb cluster were clustered near the northern part of Nandan County and the area the river downstream of Qianjiang,Xunjiang,Mongolia River trunk stream flowing through and Xiangzhou area.High Sb patches occurred in the upper reaches of Diaojiang River Nandan County,Du’an County and Yizhou City,and demonstrated clear basin characteristics.The concentration of Sb ranged from no pollution to medium pollution,and the pollution was mainly distributed in Du’an County,Hechi City and Nandan County of Hechi region,and was mainly attributed to the mining activities upstream and high geological background at local areas.

关 键 词：西江流域 土壤 SB 污染评价 

分 类 号：X53[环境科学与工程—环境工程]