| 枯、平、丰水期长江3条支流表层水中多氯联苯的分布特征及风险评价 |
| 摘要点击 1691 全文点击 1163 投稿时间：2011-10-28 修订日期：2011-12-14 |
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| 中文关键词 长江支流 表层水 多氯联苯 污染特征 风险 |
| 英文关键词 tributaries of Yangtze River surface water PCBs distribution character risk |
| 作者 | 单位 | E-mail | | 李昆 | 中国水利水电科学研究院, 北京 100038
中南林业科技大学林学院, 长沙 410004 | likun_1987@126.com | | 赵高峰 | 中国水利水电科学研究院, 北京 100038 | | | 周怀东 | 中国水利水电科学研究院, 北京 100038 | hdzhou@iwhr.com | | 曾敏 | 中南林业科技大学林学院, 长沙 410004 | | | 廖柏寒 | 中南林业科技大学林学院, 长沙 410004 | | | 吴正勇 | 中国水利水电科学研究院, 北京 100038
中南林业科技大学林学院, 长沙 410004 | | | 张盼伟 | 中国水利水电科学研究院, 北京 100038
中南林业科技大学林学院, 长沙 410004 | | | 柳敏 | 兰州大学资源环境学院, 兰州 730000 | |
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| 中文摘要 |
| 采用GC-MS/MS技术对长江3条支流(沱江、藕池河下游和松澧洪道)在不同水期的81个表层水样进行分析.实验发现样品表层水样中PCB8、18和28是优势污染物.∑PCBs在沱江、藕池河下游和松澧洪道3条支流不同水期表层水中的几何均值分别为1.96~2.59 ng ·L-1、1.84~2.54 ng ·L-1和1.52~2.38 ng ·L-1,含量均低于美国EPA连续暴露基准(14 ng ·L-1).实验结果与国内外相关文献报道值相比较,显示该研究区域表层水中PCBs浓度处于较低水平,癌症风险评价结果表明饮用该区域水摄入PCBs而带来的风险为0.15×10-7~0.26×10-7,说明研究区水样中因PCBs污染引起的癌症风险较低. |
| 英文摘要 |
| Eighty-one surface water samples were collected from 3 tributaries of the Yangtze River in different periods. Contents of 28 PCB congeners in surface water samples were measured using Varian CP3800/300 GC-MS/MS technique. PCB8, 18, and 28 are the most predominant PCB congeners in the samples from tributaries. The measured level of PCBs in the samples from the Tuo river、downstream of Ouchi river and Songlihongdao tributary were 1.96-2.59 ng ·L-1, 1.84-2.54 ng ·L-1 and 1.52-2.38 ng ·L-1. The average concentrations of PCBs in the samples were lower than USEPA criterion continuous concentration (14 ng ·L-1), which were also in the same order of magnitude of those reported with lower levels in European and American countries. The estimated cumulative cancer risk for the local residents who drink water from tributaries were 0.15×10-7-0.26×10-7,which shows that cancer risk are negligible due to PCBs contamination in these samples. |
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