惠济河底泥重金属污染特征及潜在生态风险评价

杨伟红

doi:10.3969/j.issn.1674-991X.2017.03.048

惠济河底泥重金属污染特征及潜在生态风险评价

doi: 10.3969/j.issn.1674-991X.2017.03.048

杨伟红

开封市环境监测站,河南开封 475000

详细信息

作者简介:
杨伟红(1961—),女,高级工程师, 主要从事环境监测工作研究, hjkxyj@craes.org.cn

中图分类号: X522
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- 被引次数: 0
出版历程
- 收稿日期: 2016-09-30
- 刊出日期: 2017-05-20

Characteristics and potential ecological risk assessment of heavy metals pollution in sediment of Huiji River

YANG Weihong

Kaifeng Environment Monitoring Station, Kaifeng 475000, China

摘要

摘要: 连续5 a对惠济河(开封市区段)8个断面的底泥样品中Cu、Zn、Pb、Cd及Cr 5种重金属的浓度进行分析,并采用单因子污染指数法、综合污染指数法、地积累指数法、潜在生态风险指数法进行生态风险评价。监测结果表明:8个断面中除最上游孙李唐庄桥断面底泥未受重金属污染外,其余断面底泥均有不同程度的污染,以皮屯桥断面底泥污染最重,达严重污染。综合污染指数法评价结果表明:惠济河底泥Cd为重度污染,Cu和Pb为轻度污染,Zn为轻微污染,Cr为无污染;除皮屯桥断面底泥综合污染指数高达6.74外,其他断面综合污染指数为0.55~1.89。地积累指数法评价结果表明:惠济河底泥首要重金属污染物为Cd,平均流域地积累指数高达3.50,处于污染等级4,即偏重度污染;此外,Cu、Pb偏中度污染,Zn轻度污染,Cr无污染。潜在生态风险指数法评价结果表明:惠济河底泥中Cd为强生态危害,其他重金属为轻度生态危害;重金属污染综合评价为强生态危害,这主要是Cd浓度过高造成的,其最高潜在生态风险因子达2 233.50,出现在皮屯桥断面。
- 惠济河 /
- 底泥 /
- 重金属 /
- 单因子污染指数法 /
- 综合污染指数法 /
- 地积累指数法 /
- 潜在生态风险指数法
Abstract: The contents of heavy metals, including Cu, Zn, Pb, Cd and Cr, in the sediments of 8 sections in the Huiji Rriver were analyzed for the last continuous five years. The single factor pollution index, integrated pollution index, geoaccumulation index and potential ecological risk index were adopted to evaluate the potential risk of the heavy metal pollution. The monitoring results indicated that the sediments from 8 monitoring sections had been polluted to different degree except that from Sunlitang bridge section which was at the upstream of Huiji river, while the sediment from Pitun bridge showed the highest pollution risk, at the severity level of severe pollution.The comprehensive pollution indices suggested that the river was under heavy pollution by Cd, light pollution by Cu and Pb, slight pollution by Zn and no pollution by Cr. The comprehensive pollution indices of most sediment ranged from 0.55 to 1.89, except 6.74 for Pitun bridge section. The geoaccumulation indices suggested that the most severe pollution was caused by Cd, which leaded to a high I_geo at 3.50, referred to heavy pollution. The river was still under moderate pollution by Cu and Pb, light pollution by Zn. The potential ecological risk indices suggested that the river was under high risk of Cd pollution and low risk of other four heavy metals pollution. The comprehensive potential ecological risk was high, which is pecked at 2 233.50 in the Pitun bridge section, mainly because of the high cadmium concentration in the sediment.
- Huiji River /
- sediment /
- heavy metal /
- single factor pollution index /
- integrated pollution index /
- geo-accumulation index /
- potential ecological risk index

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