Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Sciences & Engineering , Beijing Forestry University , Beijing 100083 , China.
State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China.
Environ Sci Technol. 2019 Aug 20;53(16):9462-9471. doi: 10.1021/acs.est.8b07296. Epub 2019 Aug 2.
The spatial and temporal distributions of short-, medium-, and long-chain chlorinated paraffins (SCCPs, MCCPs, and LCCPs) were studied in sediment cores and surface sediment from nine lakes in China. The highest total CP concentrations in surface sediment were found in the plateau lakes of southwest China, followed by lakes in the northeast, east, and remote northwest. The concentrations of three CP groups in cores showed an increasing trend from the 1970s to 2014, with the most rapid increase occurring from the late 2000s to 2014, consistent with the statistics on historical production of CPs in China. The three CP groups showed site-specific profiles in sediments from the nine lakes, and their percentages changed with sedimentary years. In sediment samples with dated year after 1980, MCCPs were dominant in sediment from Lakes Sihailongwan maar, Taihu, Erhai, and Chenghai, and LCCPs were predominant compounds in the other five lakes. The proportions of LCCPs rapidly increased after 1980, reflecting the increasing production and usage of LCCPs in China. The total burdens of ∑SCCPs, ∑MCCPs, and ∑LCCPs in sediment prior to 2006 were estimated to be 0.26-5100, 0.29-21000, and 0.07-4300 kg, respectively, which were 1.4-440-fold higher than those of ∑PBDEs.
研究了中国 9 个湖泊的沉积物芯和表层沉积物中短链、中链和长链氯化石蜡（SCCPs、MCCPs 和 LCCPs）的时空分布。表层沉积物中总 CP 浓度最高的是中国西南部的高原湖泊，其次是东北、东部和偏远西北部的湖泊。从 20 世纪 70 年代到 2014 年，各 CP 组在核心中的浓度呈上升趋势，从 2000 年代末到 2014 年增长最快，与中国 CP 历史产量统计数据一致。这三组 CP 在九个湖泊的沉积物中表现出特定地点的分布特征，其百分比随沉积年代而变化。在沉积年代为 1980 年后的沉积物样品中，MCCPs 在 Sihailongwan 火山口湖、太湖、洱海和澄海的沉积物中占主导地位，而 LCCPs 是其他五个湖泊的主要化合物。1980 年后 LCCPs 的比例迅速增加，反映了中国 LCCPs 的产量和使用量不断增加。在 2006 年之前，沉积物中∑SCCPs、∑MCCPs 和∑LCCPs 的总负荷估计分别为 0.26-5100、0.29-21000 和 0.07-4300kg，分别是∑PBDEs 的 1.4-440 倍。
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