Ecological risks assessment and pollution source identification of trace elements in contaminated sediments from the Pearl River Delta, China.
Ecological risks assessment and pollution source identification of trace elements in contaminated sediments from the Pearl River Delta, China.
复制标题
中国珠江三角洲污染沉积物中微量元素的生态风险评估及污染源识别
DOI：
10.1007/s12011-013-9789-2
复制
发表时间：
2013-11
影响因子：
3.9
通讯作者：
Xu, Jiang-Yu
中科院分区：
文献类型：
--
作者：
Li, Feng;Zeng, Xiang-yun;Wu, Chang-hua;Duan, Zhi-peng;Wen, Yan-mao;Huang, Guo-ru;Long, Xiao-lin;Li, Min-Jian;Li, Man-Jie;Xu, Jiang-Yu
关键词：
对佛山水道14个站位的沉积物进行了采样和分析。14个站点是根据河流的水文、污染源分布、排污口位置等排污特征选择的。评价了生态风险，确定了污染源，为环境影响评价和污染控制提供了有价值的信息。空间变异性大，变幅大，（毫克每千克干重）：铅46.0~382.8;铜33.7~ 482.3;锌62.2~1,568.7;镍28.5~130.7;铬34.7~1,656.1;镉0.50~8.53;汞0.02~8.27;砷5.77~66.09。富集因子和潜在生态危害指数评价结果表明，大部分站位表层和底层沉积物中重金属污染严重，对生态系统构成严重威胁。虽然各站微量元素的危害程度不同，但汞是所有站中最严重的污染物。主成分分析（PCA）结果表明，工业废水的排放是最主要的污染因素，而生活污水中含有大量的有机物，加速了金属的沉积。结合主成分分析结果和当地政府提供的数据，对潜在污染源进行了识别。因此，佛山水道的表层沉积物（0 ~ 20 cm）和底层沉积物（21 ~ 50 cm）均受到了微量元素的严重污染。
Sediments from 14 stations in the Foshan Waterway, a river crossing the industrial district of Guangdong Province, South China, were sampled and subsequently analyzed. The 14 stations were selected for the pollution discharging features of the river, such as the hydrology, the distribution of pollution sources, and the locations of wastewater outlets. The ecological risks were assessed, and the pollution sources were identified to provide valuable information for environmental impact assessment and pollution control. The spatial variability was high and the range were (in milligrams per kilogram dry weight): Pb, 46.0~382.8; Cu, 33.7~ 482.3; Zn, 62.2~1,568.7; Ni, 28.5~130.7; Cr, 34.7~1,656.1; Cd, 0.50~8.53; Hg, 0.02~8.27; and As, 5.77~66.09. The evaluation results of enrichment factor and potential ecological risk index indicate that the metal pollution in the surface and bottom sediments were severely polluted and could pose serious threat to the ecosystem in most stations. Although the hazard levels of the trace element differed among the stations, Hg was the most serious pollutant in all stations. The results of principal component analysis (PCA) show that the discharge of industrial wastewater is the most important polluting factor whereas domestic sewage, which contains a large amount of organic substances, accelerates metal deposition. And potential pollution sources were identified by the way of integrating the analysis results of PCA and data gained from the local government. Therefore, the conclusion is drawn that Foshan Waterway is seriously polluted with trace elements, both in the surface sediment (0 to 20 cm) and the bottom sediments (21 to 50 cm) are contaminated.
登录
查看更多内容
影响因子：
13.6
作者：
Hang, Xiaoshuai;Wang, Huoyan;Chen, Xiaoqin
通讯作者：
Chen, Xiaoqin
影响因子：
8.8
作者：
Ghrefat, Habes;Yusuf, Nigem
通讯作者：
Yusuf, Nigem
影响因子：
3.9
作者：
Guevara, SR;Bubach, D;Arribére, M
通讯作者：
Arribére, M
影响因子：
12.8
作者：
HAKANSON, L
通讯作者：
HAKANSON, L
影响因子：
11.8
作者：
Chatterjee, M.;Silva Filho, E. V.;Bhattacharya, B. D.
通讯作者：
Bhattacharya, B. D.