长江三角洲地区土壤环境质量与修复研究I.典型污染区农田土壤中多氯代二苯并二噁英/呋喃(PCDD/Fs)组成和污染的初步研究
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*国家重点基础研究发展规划项目(2002CB410810);国家自然科学基金重点项目(40432005);中国科学院知识创新工程重要方向项目(KZCX3-SW-429)资助


SOIL ENVIRONMENTAL QUALITY AND REMEDIATION IN YANGTZE RIVER DELTA REGION Ⅰ.COMPOSITION AND POLLUTION OF POLYCHLORINATED DIBENZO-p-DIOXINS AND DIBENZOFURANS (PCDD/Fs) IN A TYPICAL FARMLAND
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    摘要:

    通过同位素稀释高分辨率气相色谱-质谱方法(HRGC/HRMS)对长江三角洲地区某典型污染区农田土壤中多氯代二苯并二噁英(PCDDs)/呋喃(PCDFs)组成、含量及毒性当量进行了初步研究.结果表明,该地区农田土壤中PCDD/Fs总含量的平均值达2639.1pgg-1dw,并检测出PCDD/Fs的四氯~八氯多种异构体.根据世界卫生组织毒性当量(TEQ,哺乳动物)计算结果显示,农田土壤中PCDD/Fs的毒性当量为TEQ20.8~21.3pgg-1dw,超过加拿大国家居住环境土壤二噁英含量控制标准的5倍多,其中2,3,4,7,8-PCDF和1,2,3,7,8-PCDD对PCDD/Fs的TEQ值贡献最大.该地区农田土壤中已经出现一定程度的二噁英/呋喃污染.

    Abstract:

    Polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) in a typical farmland soil from Yangtze River Delta region were detected by high resolution gas chromatography coupled with high resolution mass spectrometry(HRGC/HRMS).The results showed that averaged total PCDD/Fs concentration in the farmland soil was 2 639 pg g-1 dw.The isomers of PCDD/Fs covered Cl4~Cl8.WHO-TEQ calculation indicated that PCDD/Fs TEQ in the soils ranged from 20.82 to 21.32 pg g-1 dw,among which 2,3,4,7,8-PCDF and 1,2,3,7,8-PCDD were the two important isomers contributing largely to the total PCDD/Fs TEQ.It is concluded that the farmland soil had been contaminated to some extent with polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) that were likely released from dismantlement,dissolution and cineration of capacitors in transformer and/or electronic wastes.

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骆永明,滕应,李清波,吴龙华,李振高,张庆华.长江三角洲地区土壤环境质量与修复研究I.典型污染区农田土壤中多氯代二苯并二噁英/呋喃(PCDD/Fs)组成和污染的初步研究[J].土壤学报,2005,42(4):570-576. DOI:10.11766/trxb200412200406 Luo Yongming, Teng Ying, Li Qingbo, Wu Longhua, Li Zhengao, Zhang Qinghua. SOIL ENVIRONMENTAL QUALITY AND REMEDIATION IN YANGTZE RIVER DELTA REGION Ⅰ. COMPOSITION AND POLLUTION OF POLYCHLORINATED DIBENZO-p-DIOXINS AND DIBENZOFURANS (PCDD/Fs) IN A TYPICAL FARMLAND[J]. Acta Pedologica Sinica,2005,42(4):570-576.

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  • 收稿日期:2004-12-20
  • 最后修改日期:2005-03-29
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  • 在线发布日期: 2013-02-25
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