Levels of polychlorinated biphenyls in 1,4-dichlorobenzene mothballs
  • 【DOI】

    10.3321/j.issn:1001-0742.2005.01.023

  • 【摘要】

    Although polychlorinated biphenyls(PCBs) are globally recognized pollutant, an understanding of their resources as by-products in chemical industry is poorly investigated. This paper presents data fro... 展开>>Although polychlorinated biphenyls(PCBs) are globally recognized pollutant, an understanding of their resources as by-products in chemical industry is poorly investigated. This paper presents data from a study that was conducted in order to determine the extent of PCBs in 1,4-dichlorobenzene(p-DCB) mothballs. Total PCBs and dioxin-like PCBs were detected in five mothball samples. Total PCB concentrations ranged from 328 ng/g to 1798 ng/g, while the levels of WHO-TEQ were between 0.16 pg/g and 13 pg/g. Mean concentrations of total PCBs and WHO-TEQ in the samples were 724 ng/g and 3.2 pg/g, respectively. The highest level of PCB congeners was that of trichlorinated biphenyls(537 ng/g), which maybe due to the relatively low chlorination in the process of p-DCB production. A mechanism of the formation of PCBs from polychlorinated benzene in the presence of chlorine is also suggested. The results suggested that re-estimation on the risk of p-DCB products, especially the products for daily use such as mothballs, is expected. 收起<<

  • 【作者】

  • 【作者单位】

    Key Laboratory of Environmental Chemistry and Ecotoxicology

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2005年1期

  • 【关键词】

    mothball  p-DCB  1,4-dichlorobenzene  polychlorinated biphenyls(PCBs) 

  • 【基金项目】

    国家重点基础研究发展计划(973计划) 中国科学院资助项目