Heavy Metal Pollution Status and Health Risk Assessment in the Longjiang River

• 作者: Deng Chaobing Deng Qucheng Huang Yong Lu Qiu Lu Wei Wang Xiaofei Wang Yunlong
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: Longjiang RIVER HEAVY METALS Nemerow COMPREHENSIVE index method HEALTH risk assessment
• 年，卷（期）: 2017,（3）
• 页码范围: 51-56
• 页数: 6页
• 分类号: P

摘要

[Objectives] The purpose of this research was to investigate the water quality of the Longjiang River in Guangxi. Concentrations of heavy metals (As, Cd, Zn, Pb and Cu) in the surface water of Longjiang River were analyzed to figure out the distribution characteristics of heavy metal pollutants in this area. [Methods] The Nemerow comprehensive index method and the health risk assessment model were adopted to evaluate the grade of Longjiang River water quality and the health risk level imposed by heavy metals in the water. [Results] The concentrations of heavy metals in each sampling point conformed to Grade-ll water quality standard. The water samples collected on 13 sampling points of the Longjiang River were clean and not polluted by heavy metals. The health risk values of heavy metals As and Zn were greater than Cd, Pb and Cu in the Longjiang River, but still lower than the maximum acceptable risk level 5.0 x 10 ' 5 a _1. [ Conclusions ] Water quality condition reflected by the comprehensive pollution index and the health risk value of heavy metal was consistent in the Longjiang River, showing as that the value in middle and lower reaches was slightly higher than in the upper reaches. As is the major pollutant of water environment health risk in the Longjiang River,and it should be regarded as the key object of water environment risk management in Longjiang River.