生态环境学报2017，Vol.26Issue(11)：1977-1984,8.DOI:10.16258/j.cnki.1674-5906.2017.11.019
包头市南海湿地土壤重金属污染评价及来源解析
Pollution Assessment and Source Apportionment of Heavy Metals in NanHai Wetland Soil of Baotou City
摘要
Abstract
The Nanhai wetland soil in Baotou City is a unique wetland ecosystem of high latitude cold and arid regions in Northwest of China. The soil as the research object, As, Cd, Cr, Cu, Ni, Mn, Pb and Zn heavy metals in topsoil samples (0~20 cm) of 28 sites of the Nanhai wetland were detected and analyzed, using the method of environmental quality index and Hakanson potential ecological risk index to discuss the accumulation of pollution with the 8 kinds of heavy metals in soil and potential ecological risk, using correlation analysis, principal components analysis and clustering analysis to distinguish the source of the wetland heavy metals in order to provide theoretical basis for the Nanhai wetland soil environmental protection. The results showed that the average content of As, Cd, Cr, Cu, Ni, Mn, Pb and Zn was 75.18, 1.27, 56.98, 111.18, 87.67, 622.71, 54.10 and 209.33 mg·kg-1, respectively. Based on the content of heavy metals in the Trees of Nanhai Park in Baotou, the heavy metals were generally exceeded. As, Cd, Cu, Mn, and Pb were all over standard in all sampling areas of the study area, 64.29% of the samples exceeded the standard of Cr, 96.43% of the samples exceeded the standard of Ni, and 89.29% of the samples exceeded the standard of Zn. The single factor pollution index showed that Cd was moderately polluted; As, Cu, Pb and Zn were in severe pollution; Cr, Ni and Mn were slightly polluted.Heavy pollution levels were found on both sides of the farmland and landscape Avenue, and the fish pond area and wetland plant area were in the middle pollution level. The potential ecological risk index showed that Cd was at a very high risk level; As, Cr, Cu, Ni, Mn, Pb and Zn was at a low risk level; the study area was in a middle risk level as a whole. Source analysis showed that As, Cd, Cu, Ni and Mn was affected by the surrounding industrial and agricultural activity; Pb and Zn was related with the road traffic, Pb might be affected by the industrial activity; Cr was affected by soil parent materials and agricultural activities.关键词
南海湿地/土壤/重金属/污染/生态风险/来源解析Key words
Nan Hai wetland/soil/heavy metal/ecological risk/source analysis分类
资源环境引用本文复制引用
李卫平,王非,杨文焕,崔亚楠,樊爱萍,苗春林..包头市南海湿地土壤重金属污染评价及来源解析[J].生态环境学报,2017,26(11):1977-1984,8.基金项目
国家自然科学基金项目(41263010) （41263010）
内蒙古包头黄河湿地生态系统国家定位观测研究站运行补助(2015-LYPT-DW-037) （2015-LYPT-DW-037）
