水资源保护2018，Vol.34Issue(2)：61-67,87,8.DOI:10.3880/j.issn.1004-6933.2018.02.10
沙颍河表层沉积物中氮与重金属的分布特征及污染评价
Characterization and ecological risk assessment of nitrogen and heavy metal pollution in surface sediments of Shaying River
摘要
Abstract
To assessment pollution of heavy metal and nitrogen in surface sediments of the Shaying River,sampling had been conducted during the period from June to September of 2015.The nitrogen occurrence characteristics and its transformation mechanism in surface sediments of the Shaying River were studied,as well as the distribution of heavy metal.Results showed that the contents of NO3--N,NH4+-N,organic nitrogen (ON) and total nitrogen (TN) in sediment were 21.47 ～ 53.60 mg/kg,1.702 3 ～ 3.066 1 mg/kg,1 050 ～ 2 390 mg/kg and 1 071 ～ 2 488 mg/kg,respectively,and ON accounted for 97.17％ of TN.While the contents of Cd,Cu,Zn,and As were 1.583 ～ 3.533 mg/kg,21.98 ～ 64.60 mg/kg,148.5 ～ 165.5 mg/kg and 1.527 ～ 2.416 mg/kg,separately.Pearson correlation analysis showed nitrogen in surface sediments were mainly existed in organic matter,while sediment could be an important source to the NH4+ in the water body.Organic index and organic nitrogen of sediments,fell into the level Ⅱ and the level Ⅳ,respectively,implying light organic carbon pollution but serious nitrogen pollution in the sediments.The potential ecological risk (IR) of heavy metals showed that potential ecological risk of heavy metals has reached very high potential ecological risks,in which the contribution of Cd to IR was about 97.22％.关键词
沙颍河/表沉沉积物/氮形态/重金属/污染评价Key words
Shaying River/surface sediment/nitrogen form/heavy metal/pollution assessment分类
资源环境引用本文复制引用
马培,鲍锦磊..沙颍河表层沉积物中氮与重金属的分布特征及污染评价[J].水资源保护,2018,34(2):61-67,87,8.基金项目
国家自然科学基金(41401549) （41401549）
河南工程学院博士基金(D2013015) （D2013015）
