摘要
为了解水质污染对沉积物质量的影响,在清潩河许昌段河道内采集10个代表性点位处的沉积物样品,对pH、有机质、总氮、总磷、Cu、Zn、As、Cr和Pb含量进行分析,根据环境背景值或生态风险阈值对各指标及各点位的污染状况进行评价,与文献中报道的其他流域沉积物中污染物含量进行了对比,并对清潩河河道沉积物的污染原因进行分析。结果表明,清潩河河道表层沉积物整体处于污染状态,部分河道为重污染;与其他流域相比,清潩河河道表层沉积物中有机质、总氮和总磷的污染程度比较严重,尤其总氮的污染尤为突出。水资源匮乏、造纸厂及城镇污水处理厂的排污是造成上述结果的主要原因。
To understand the effect of water quality pollution on sediment quality, surface sediment samples from 10 typical sites in Qingyi River in Xuehang City were examined from nine parameters （pH, organic matters （OM）, total nitrogen （TN）, total phosphorus （TP）, Cu, Zn, As, Cr and Pb）. Pollution assessments for parameters and sites were conducted by using environmental background values in soils or ecological risk thresholds, and the con- centrations of pollutants in surface sediments in Qingyi River were compared with those in other basins reported in literatures. Results showed that the whole surface sediments of Qingyi River were polluted, part of the river channel even severely polluted. Compared with other river basins, the concentrations of OM, TN and TP in the surface sedi- ments of Qingyi River were extremely higher, especially the pollution of TN. Deficient water resources and wastewater discharge from paper-making factories and municipal sewage treatment plants are the main causes of the above pollution. This study may provide useful guidance for the comprehensive control and treatment of environmen- tal pollution in Qingyi River.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2014年第2期5-10,共6页
Environmental Pollution & Control
基金
国家水体污染控制与治理科技重大专项课题(No.2012ZX07503-002)
关键词
表层沉积物
污染评价
有机质
总氮
总磷
surface sediment
pollution assessment
organic matter
total nitrogen
total phosphorus
