焦化厂周边土壤重金属分布特征及生态风险评价

商执峰; 祝方; 刘涛; 陈东

doi:10.13961/j.cnki.stbctb.2014.06.056

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焦化厂周边土壤重金属分布特征及生态风险评价

试验研究

- 焦化厂周边土壤重金属分布特征及生态风险评价
- Distribution and Ecological Risk Assessment of Soil Heavy Metals Around Coking Plant
- 水土保持通报 2014年33卷第6期页码：288-292
- 作者机构：
  
  太原理工大学环境科学与工程学院,山西,太原,030024
- 作者简介：
- 基金信息：
  
  山西省基础研究计划项目"天然高分子改性絮凝剂的合成及其对焦化废水的絮凝性能研究"(2008011020)
- DOI：10.13961/j.cnki.stbctb.2014.06.056
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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商执峰, 祝方, 刘涛, 等. 焦化厂周边土壤重金属分布特征及生态风险评价[J]. 水土保持通报, 2014,33(6):288-292.

SHANG Zhi-feng, ZHU Fang, LIU Tao, et al. Distribution and Ecological Risk Assessment of Soil Heavy Metals Around Coking Plant[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 288-292.
商执峰, 祝方, 刘涛, 等. 焦化厂周边土壤重金属分布特征及生态风险评价[J]. 水土保持通报, 2014,33(6):288-292. DOI： 10.13961/j.cnki.stbctb.2014.06.056.

SHANG Zhi-feng, ZHU Fang, LIU Tao, et al. Distribution and Ecological Risk Assessment of Soil Heavy Metals Around Coking Plant[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 288-292. DOI： 10.13961/j.cnki.stbctb.2014.06.056.

摘要

为研究某焦化厂周边土壤中重金属(Pb

Cr和Mn)的生态风险

对焦化厂东、西、南和北方向上的500

1000和3000 m处表层土壤进行了采样。采用单因子质量指数法、地累积指数法以及潜在生态危害指数法对各样点土样中重金属的生态风险进行了评价。结果表明

所有采样点中Cd含量是土壤环境质量标准(GB15618-1995)Ⅱ级标准中Cd标准值的2.1~7.2倍

其他重金属含量均未超过其标准值

各重金属元素含量均在1000 m处达到最大值;研究区域土壤中各种重金属元素的污染程度由强至弱依次为:Cd >Cr >Cu≈Zn>Pb≈Mn

潜在生态危害由强至弱依次为:Cd >>Pb >Cu >Cr >Zn >Mn

北部 >西部 >东北 >南部;焦化厂周边土壤整体存在严重的潜在生态风险

特别是焦化厂北面土壤中重金属的潜在生态风险为极严重

其中Cd在土壤中存在严重的累积效应

是造成潜在生态风险的主导因子。

Abstract

The surface soil at the 500

1000 and 3000 m in the east

west

south and north of coking plants were sampled and three methods(single factor index

geo-accumulation index and Hakanson potential ecological risk index) were adopted to assess the potential ecological risk of heavy metals(Pb

Cr and Mn) near coking plant in Taiyuan City. Results showed that the concentration of Cd in all soil samples was 2.1~2.7 times of the standard value(Ⅱ) of environmental quality standard(GB15618-1995) for soil

the concentration of the other heavy metals did not exceed the standard values(Ⅱ) and the concentration of six heavy metals was maximum at 1000 m; The relative degree of pollution was in the order of Cd >Cr >Cu≈Zn>Pb≈Mn; Likewise

the potential ecological risk was characterized by the order of Cd >>Pb >Cu >Cr >Zn >Mn and north >west >east >south

and the soil in the research area possessed serious potential ecological risk

specially the potential ecological risk of heavy metals in the north of the coking plant was very serious

in which

Cd was dominant contributors for ecological risk

for it accumulated markedly in soil around the coking plant.

关键词

Keywords

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