应用生态学报2012，Vol.23Issue(5)：1254-1262,9.
惠州市3座供水水库沉积物重金属污染特征
Characteristics of sediment heavy metal pollution in three water supply reservoirs in Huizhou, Guangdong Province of South China
摘要
Abstract
To understand the present status of the heavy metal (Cr, Cu, Zn, Cd, Pb and Hg) pollution of the sediments in water supply reservoirs in Huizhou, sediment cores were sampled from three representative reservoirs. The heavy metal concentrations were analyzed by ICP-MS, and the pollution status was assessed by geo-accumulation index (/geo) and potential ecological risk index (RI). In the meantime, the possible sources of the heavy metals were analyzed by the principal component analysis ( PC A). In the sediments of the three reservoirs, the test heavy metals had different vertical distribution, some had less change, the others decreased or increased with depth, and the distribution patterns differed with the reservoirs. According to the 7geo, the sediments in the reservoirs were seriously polluted by Zn and Pb (Zn: 49. 98-640. 29 mg· kg-1; Pb: 21. 94-300. 66 mg ·kg-1 ) , reaching slight to high pollution, and the middle or bottom part of the sediments was slightly polluted by Cu (16. 85-45. 46 mg·kg-1). On the whole, the sediments were not polluted by Cr, Cd and Hg. According to the RI and the potential ecological risk coefficient [Er(i)], the sediments in the three reservoirs were under low potential ecological risk. Based on the PCA and relevant information, the human activities such as mining and smelting, urbanization,and agriculture and forestry had great contribution to the heavy metal pollution. The Zn and Pb pollution mainly originated from mining and smelting, Pb pollution also came from motor vehicle exhaust emission and domestic wastes, and Cu pollution mainly derived from agriculture and forestry.关键词
重金属/地积累指数/潜在生态风险指数/沉积物/水库Key words
heavy metal/ geo-accumulation index/ potential ecological risk index/ sediment/reservoir.分类
天文与地球科学引用本文复制引用
陈修康,张华俊,顾继光,胡韧,杨浩文,陈敬安..惠州市3座供水水库沉积物重金属污染特征[J].应用生态学报,2012,23(5):1254-1262,9.基金项目
广东省水利科技创新基金项目和国家自然科学基金重点项目(U0733007)资助. （U0733007）
