| 电子废物拆解区农业土壤中多氯联苯的污染特征 |
| 摘要点击 2894 全文点击 1390 修订日期：2011-07-01 |
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| 中文关键词 电子废物 土壤 多氯联苯 分布 来源 |
| 英文关键词 electronic waste soils polychlorinated biphenyls (PCBs) distribution source |
| 作者 | 单位 | E-mail | | 王学彤 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444 | wangxt0323@yahoo.com.cn | | 李元成 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444 | | | 张媛 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444 | | | 缪绎 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444 | | | 孙阳昭 | 中华人民共和国环境保护部,北京 100035 | | | 吴明红 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444 | | | 盛国英 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444
中国科学院广州地球化学研究所 有机地球化学国家重点实验室,广州 510640 | | | 傅家谟 | 上海大学环境与化学工程学院,环境污染与健康研究所,上海 200444
中国科学院广州地球化学研究所 有机地球化学国家重点实验室,广州 510640 | |
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| 中文摘要 |
| 用GC-μECD分析法测定了路桥表层土壤中144种多氯联苯同类物的含量. 目的是了解该地区表层土壤中PCBs的污染水平、空间分布特征和来源. 结果表明, 样品中ΣPCBs为0.779~937 ng·g-1, 均值为75.7 ng·g-1, 研究区域中南部污染水平较高. 同族体组成特征表明, 38个样品组成以penta-CBs、hexa-CBs和tetra-CBs为主, 含量范围分别为13.0%~61.1%、4.59%~48.8%和10.1%~31.5%; 另外3个样品组成以di-CBs为主, 范围为47.1%~75.2%. 聚类分析表明, 大多数样品主要受到Ar1254工业品的污染, 少数样品的污染与Ar1221工业品有关. ΣPCBs与TOC显著相关, 表明土壤中TOC的含量是影响PCBs在土壤中蓄积的重要因素之一; 各PCBs同族体(除di-CBs与nona-CBs之间外)显著相关, 表明各PCBs同族体有相似的输入途径. 与国内外其它研究相比, 研究区域表层土壤PCBs污染处于中高水平. |
| 英文摘要 |
| The concentrations of 144 polychlorinated biphenyls (PCBs) in the soils from Luqiao were analyzed by GC-μECD. The objectives of this study were to understand the contents, spatial distribution and sources. The ΣPCBs concentrations in soils samples were in the range of 0.779 ng·g-1 to 937 ng·g-1, with a mean of 75.7 ng·g-1, and the relatively high level of PCBs were mainly distributed in the south central area. Penta-CBs, hexa-CBs and tetra-CBs were the primary homologues in 38 samples, with the range of 13.0%-61.1%, 4.59%-48.8% and 10.1%-31.5%, respectively. Di-CBs was the most predominant homologues in other samples, with the range of 47.1%-75.2%. The hierarchical cluster analysis (HCA) showed that most of samples were mainly polluted by Ar1254, few samples were polluted by Ar1221. Significant correlations were observed between ΣPCBs and TOC, which suggested PCBs were affected by TOC in soils. The correlation analysis also showed significant correlation among the PCBs homologues (except di-CBs and nona-CBs), which suggested PCBs might have the similar sources. Compared to other studies from different countries and regions, the PCBs concentrations in the present study were at an upper-middle level. |
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