农业环境科学学报Issue(5)：1033-1040,8.DOI:10.11654/jaes.2014.05.029
苏南典型村镇河网区沉积物重金属与营养盐污染评价
Assessment of Heavy Metal and Nutrient Pollution in Surface Sediments from Rural River Network in South-ern Jiangsu Province, China
摘要
Abstract
River sediments could accumulate heavy metals and nutrients from and then release into water, causing water pollution. An in-vestigation was performed to assess the pollution status and sources of heavy metals(As, Cd, Cr, Cu, Hg, Ni, Pb and Zn), and nutrients [total nitrogen(TN), total phosphorus(TP)and organic matter(OM)] in 34 surface sediment samples collected from rural rivers in Southern Jiangsu Province, China. The mean concentrations of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn in surface sediments were 15.7, 6.11, 162, 124, 0.55, 86.3, 72.5 mg·kg-1 and 370 mg·kg-1, which were 1.6, 46.9, 2.1, 5.5, 1.9, 3.2, 2.8 times and 5.9 times higher than their background values in the soils of Jiangsu Province, respectively. TN and TP were averagely 2.54 g·kg-1 and 1.30 g·kg-1, respectively. The Index of Geoaccumulation showed that Cd was the most serious pollutant. Organic index and organic nitrogen of sediments were 0.98 and 0.24%, re-spectively, both falling into the levelⅣ, implying their pollution. The discharges of domestic sewage and industrial wastewater were identi-fied as major pollutant sources. The present results suggest that heavy metal and nutrient pollution have become an environmental issue in the studied area and immediate remediation measures should be implemented.关键词
河网/沉积物/重金属/营养盐/污染评价Key words
river network/sediment/heavy metal/nutrient/pollution assessment分类
资源环境引用本文复制引用
薄录吉,王德建,张刚,冉景,郑继成..苏南典型村镇河网区沉积物重金属与营养盐污染评价[J].农业环境科学学报,2014,(5):1033-1040,8.基金项目
十二五国家科技支撑资助项目 （）
