| 黄河表层沉积物中类二(口恶)英多氯联苯水平分布 |
| 摘要点击 3905 全文点击 1898 投稿时间：2013-12-02 修订日期：2014-03-11 |
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| 中文关键词 类二(口恶)英多氯联苯 黄河流域 沉积物 同族体 |
| 英文关键词 dioxin-like polychlorinated biphenyls the Yellow River basin sediment congener |
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| 中文摘要 |
| 从青藏高原到黄河入海口，采集了黄河流域不同地区15个采样点的表层沉积物，使用GC-MS测定了表层沉积物中类二(口恶)英多氯联苯（DL-PCBs）的浓度水平，黄河流域15个采样点ΣDL-PCBs浓度范围（以dw计，下同）为2.3~14.8 pg ·g-1 ，毒性当量在0.0014~0.0231 pg ·g-1之间，平均值为0.0073 pg ·g-1，与国内外其他河流的研究相比，黄河沉积物中DL-PCBs水平和毒性当量处于较低水平. 黄河沉积物中DL-PCBs同族体主要以四氯代和五氯代为主，其中黄河流经的乡村与经济欠发达地区沉积物中DL-PCBs同族体组分较为相似，而流经工业发达、人口众多地区的沉积物中DL-PCBs同族体分布相似. 研究表明石化企业及水利水电设施影响沉积物中DL-PCBs同族体的组成分布，并且黄河表层沉积物中ΣDL-PCBs的浓度与当地人均GDP显著相关，黄河流经经济发达地区的沉积物中的DL-PCBs水平高于偏远地区. |
| 英文摘要 |
| The levels of DL-PCBs in the surface sediments collected in 15 different sampling sites from the Tibetan Plateau to the Yellow River estuary along the Yellow River were measured using the GC-MS. The concentrations of ΣDL-PCBs ranged from 2.3 to 14.8 pg ·g-1 and the TEQs of DL-PCBs were between 0.0014 and 0.0231 pg ·g-1, with an average of 0.0073 pg ·g-1. Compared with other domestic and foreign rivers, the DL-PCBs and TEQ levels of the Yellow River were at low levels. The main DL-PCBs congeners in the Yellow River sediments were tetra and penta chlorinated biphenyls. The DL-PCBs congener composition of rural and underdeveloped areas was similar, and there was similar congeners composition between the industry developed areas and the populous areas. Petrochemical industries and hydropower facilities may affect the distribution of DL-PCBs congener in the sediments. A significant correlation between concentrations of DL-PCBs and GDP per capita was found. It indicated that the contamination extent of DL-PCBs in the Yellow River was related with the local economic development, DL-PCBs levels in developed areas were higher than those in remote rural areas. |
