地学前缘 ›› 2008, Vol. 15 ›› Issue (5): 82-89.

• 论文 • 上一篇    下一篇

北京郊区农田土壤中滴滴涕和六六六地球化学特征研究

  

  1. 1中国地质大学(北京) 地球科学与资源学院, 北京 100083
    2中国地质大学(武汉) 生物地质与环境地质教育部重点实验室, 湖北 武汉  430074

  • 出版日期:2008-05-02 发布日期:2008-05-02
  • 作者简介:刘晨(1983—), 女,博士研究生,从事地球化学研究。Email: xpshino1@126com 通讯作者简介: 陈家玮(1974—), 男,博士,副教授,从事地球化学研究和教学工作。Email: chenjiawei@cugbeducn第15卷
  • 基金资助:

    教育部“新世纪优秀人才支持计划”项目(NCET070769); 国家自然科学基金项目(NSFC40503008); 生物地质与环境地质教育部重点实验室开放课题(BGEG0613)

Geochemical characteristics of DDT and HCH in　agricultural soil in the suburb of Beijing.

  1. 1School of Earth Sciences and Resources, China

    University of Geosciences(Beijing), Beijing 100083, China
    2Key Lab of Biogeology and Environmental Geology of Ministry of Education, China

    University of Geosciences(Wuhan), Wuhan  430074, China

  • Online:2008-05-02 Published:2008-05-02

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摘要：

北京是中国政治、经济和文化中心,人口密集。近年来,随着社会经济快速发展,环境问题,特别是持

久性有机污染物所造成的环境污染和危害,已引起人们普遍关注。有机氯农药是一种典型的持久性有机污

染物,由于土壤环境质量与人类健康关系密切,所以对北京郊区农田土壤中有机氯农药残留水平及风险评价

的研究具有十分重要的意义。文中以北京郊区为目标区域,主要研究了北京郊区典型农田土壤中滴滴涕

(DDT)和六六六(HCH)的空间分布地球化学特征,及其在两条土壤垂向剖面中的分布状况。共采集表层土壤

样品9件,垂向样品8件。DDTs、HCHs在土壤样品中均有不同程度的检出。∑DDTs在9个表层土壤样品中的含

量为0~29240 μg/kg,∑HCHs为069~2662 μg/kg。垂向土壤样品分析结果表明,样品中DDTs检出率

较低,总体含量随土壤样品深度增加而降低。其中一条剖面土壤样品仅表层有四种DDT异构体的检出,其他

位置均未检出。另一条剖面样品中除p,p′DDE检出,其余各异构体均未检出。剖面样品中HCHs均有不同

程度检出,含量随土壤剖面深度的增加变化不明显。根据国家《土壤环境质量标准》(GB 15618—95),初步

分析北京郊区农田土壤中DDTs残留风险较低,除个别样品达到二级标准外,绝大部分土壤达到一级标准。土

壤样品中HCHs残留均未超标,并且依据不同异构体的含量及分布,可以初步判断近年没有新输入HCHs污染本

区。

关键词: 农田土壤;有机氯农药;分布特征

Abstract:

Beijing is the political, economical and cultural center of China with a huge

population. As the rapid development of society and economy, a great many of environmental

problems come about. The organochlorine pesticide is a kind of persistent organic

pollutants, and nowadays more attention is paid to its pollution to the environment. Because

the quality of soil is closely related to the human health, it is very important and

meaningful to do research on the residues of organochlorine pesticide in agricultural soil

in the suburb of Beijing. In this paper, the distributional characteristics of the DDTs and

HCHs residues were analyzed in both surface and deep soil samples. The risks of DDTs and

HCHs residues were also discussed, and it could provide a reference for evaluation of

environmental geochemistry. The DDTs and HCHs were detected in 9 surface soil and 8 deep

soil samples at different levels. The DDTs residues were at a low level with the ∑DDTs

ranging from 0 to 29240 μg/kg, while the contents of ∑HCHs varied from 069 μg/kg to

2662 μg/kg. Few DDT isomers were detected in the deep soil samples. The contents of DDTs

were decreased with the increase in the depth of soil profile. In one sample the four

isomers of DDT  were found in the first layer, and in the others only p,p′DDE was

detected. The HCHs were found in all the layers at different levels. The contents of HCHs

were not increased obviously as the depth of soil profile increased. The concentrations of

DDTs in most samples reached the first level of the national standard quality of soil

environment (GB 1561895). And the contents of HCHs were also lower than the standard.

According to the concentration and distribution of different isomers, we concluded that

there was no new input of pollution in this area.

Key words:

Key words: agricultural soil；organochlorine pesticides；distribution characteristics

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