Historical Contribution of Different Sources to Environmental Dioxin Pollution Estimated from the Lake Shinji Sediment Core
Historical Contribution of Different Sources to Environmental Dioxin Pollution Estimated from the Lake Shinji Sediment Core
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从宍道湖沉积物岩心估算不同来源对环境二恶英污染的历史贡献
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
J. Nakanishi
中科院分区：
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作者：
S. Masunaga;Y. Yao;I. Ogura;S. Nakai;Y. Kanai;M. Yamamuro;J. Nakanishi
导言一个显着的一部分二恶英积累在日本的表层水生沉积物中指出，已经起源于农用化学品，特别是五氯苯酚（PCP）和氯硝草醚（CNP）。由于这些化学品在过去被广泛用作稻田除草剂，它们现在对污染的贡献可能比过去小。因此，估计它们对环境二恶英污染的历史贡献是有意义的。在这项研究中，我们分析了二恶英在一个过时的沉积物芯从信治湖，接收来自农业用地和一些当地城镇的污水。为了进行详细的统计分析，对与个别同系物或同系物组相对应的80多个气相色谱峰进行了量化。
Introduction A significant portion of dioxins accumulated in surface aquatic sediment in Japan was indicated to have originated from agrochemicals, especially pentachlorophenol (PCP) and chloronitrofen (CNP). Since these chemicals were used extensively as paddy field herbicides in the past, their present contribution to pollution may be less than that in the past. Thus, it is of interest to estimate their historical contribution to environmental dioxin pollution. In this study, we analyzed dioxins in a dated sediment core taken from Lake Shinji which receives effluent from agricultural land and some local towns. A total of more than 80 gas chromatographic peaks corresponding to individual congeners or groups of congeners were quantified in order to perform a detailed statistical analysis.