渭河西安段水体重金属污染现状及其健康风险评价

杨学福; 关建玲; 段晋明; 王蕾; 裴晓龙; 罗仪宁; 李伟

doi:10.13961/j.cnki.stbctb.2014.02.033

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渭河西安段水体重金属污染现状及其健康风险评价

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- 渭河西安段水体重金属污染现状及其健康风险评价
- Heavy Metal Pollution and Related Health Risk of Weihe River in Xi'an Section
- 水土保持通报 2014年33卷第2期页码：152-156
- 作者机构：
  
  1. 西安建筑科技大学环境与市政工程学院,陕西,西安,710055
  2. 西安工业大学建筑工程学院,陕西,西安,710032
  3. 陕西省环境监测中心站,陕西,西安,710054
- 作者简介：
- 基金信息：
  
  陕西省学科建设人才基金项目"水质与水环境科学"(DB03087)
- DOI：10.13961/j.cnki.stbctb.2014.02.033
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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杨学福, 关建玲, 段晋明, 等. 渭河西安段水体重金属污染现状及其健康风险评价[J]. 水土保持通报, 2014,33(2):152-156.

YANG Xue-fu, GUAN Jian-ling, DUAN Jin-ming, et al. Heavy Metal Pollution and Related Health Risk of Weihe River in Xi'an Section[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 152-156.
杨学福, 关建玲, 段晋明, 等. 渭河西安段水体重金属污染现状及其健康风险评价[J]. 水土保持通报, 2014,33(2):152-156. DOI： 10.13961/j.cnki.stbctb.2014.02.033.

YANG Xue-fu, GUAN Jian-ling, DUAN Jin-ming, et al. Heavy Metal Pollution and Related Health Risk of Weihe River in Xi'an Section[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 152-156. DOI： 10.13961/j.cnki.stbctb.2014.02.033.

摘要

以Hg

Zn和Se为研究对象

采用单因子水质标准比较法、重金属污染指数法(HPI)对渭河西安段水体的重金属污染现状进行了分析

并采用USEPA的健康风险评价模型对其健康风险进行了评价。结果表明

2012年渭河西安段水体中Pb和Cd未检出

依据《地表水环境质量标准(GB3838-2002)》渭河西安段水体中存在一定的Hg污染

其余重金属含量水平在Ⅰ-Ⅱ类标准范围内;渭河西安段水体HPI值为32.74

小于污染临界值100

说明其重金属污染尚处于可接受水平;研究涉及的重金属的非致癌和致癌健康风险均处于可接受水平

As引起的健康风险最大

其致癌健康风险值为8.50×10

-5

接近可接受水平的上限(10

-4

)

应引起环境管理部门的特别关注。

Abstract

The pollution by heavy metals of Hg

Cr6+

Zn and Se in the Weihe River of Xi'an section were analyzed using the methods of single factor water quality assessment and heavy metal pollution index(HPI). The health risks of these metals were evaluated by the method documented by USEPA. The results indicated that Pb and Cd were undetectable in all water samples

but the water was contaminated to certain degrees by Hg while all other metal contents were within the limits of the categoryⅠor Ⅱ of surface waters based on the Environmental Quality Standards for Surface Water (GB3838-2002). The HPI of the water of the river in the region was 32.74

which was lower than the threshold value of 100

indicating that the pollution is within the acceptable level. The results also showed that the non-carcinogenic risk and the carcinogenic risk of the investigated metals are acceptable

and the highest carcinogenic risk was from As in the water body

with the risk index being at 8.50×10-5. It suggests that As in water of the region should be of specific concern for the local environmental monitoring and management authorities

since its health risk index was almost close to the upper acceptable limit(10-4).

关键词

Keywords

references

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