Environmental Occurrence and Distribution of Short Chain Chlorinated Paraffins in Sediments and Soils from the Liaohe River Basin, P. R. China
Environmental Occurrence and Distribution of Short Chain Chlorinated Paraffins in Sediments and Soils from the Liaohe River Basin, P. R. China
复制标题
中国辽河流域沉积物和土壤中短链氯化石蜡的环境赋存与分布
DOI：
10.1021/es2041256
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发表时间：
2012-04-03
影响因子：
11.4
通讯作者：
Chen, Jiping
中科院分区：
文献类型：
--
作者：
Gao, Yuan;Zhang, Haijun;Chen, Jiping
辽河流域是氯化石蜡工业化生产的重要地区。它们的排放不可避免地造成环境污染。然而，在这个典型的工业区，关于它们的环境水平和分布的信息非常有限。在这项研究中，对辽河流域沉积物、水稻土和高地土壤中的短链氯化石蜡进行了分析，其浓度范围为39.8至480.3纳克/克（干重）。随着与城市距离的增加，短链氯化石蜡的浓度呈下降趋势，这表明当地的工业活动是短链氯化石蜡污染的主要来源。对短链氯化石蜡的初步沉积物清单显示，辽河沉积物中约有30.82吨短链氯化石蜡残留。短链氯化石蜡的平均排放量估计约为74.4毫克/伦讷工业废水。同系物组谱显示，短链和低氯的相对丰度。农村地区土壤中的氯化石蜡同系物（含5或6个氯原子的C-10氯化石蜡）含量高于城市附近的土壤，这表明远距离大气迁移可能是主要的迁移途径。短链氯化石蜡可能发生环境降解，高氯化同系物可能脱氯形成低氯化同系物。
Chlorinated paraffins (CPs) are industrially produced in large quantities in the Liaohe River Basin. Their discharge inevitably causes environmental contamination. However, very limited information is available on their environmental levels and distributions in this typical industrial region. In this study, short chain CPs (SCCPs) were analyzed in sediments, paddy soils, and upland soils from the Liaohe River Basin, with concentrations ranging from 39.8 to 480.3 ng/g dry weight. A decreasing trend in SCCP concentrations was found with increasing distance from the cities, suggesting that local industrial activity was the major source of SCCP contamination. A preliminary sediment inventory of SCCPs indicated approximately 30.82 tonnes of SCCPs residual in the sediments from the Liaohe River. The average discharge of SCCPs was estimated to be about 74.4 mg/ronne industrial wastewater. The congener group profiles showed that the relative abundances of shorter chain and lower chlorinated. CP congeners (C-10-CPs with 5 or 6 chlorine atoms) in soils in rural areas were higher than in sites near cities, which demonstrated that long-range atmospheric transportation could be the major transport pathway. Environmental degradation if SCCPs might occur, where higher chlorinated congeners could dechlorinate to form the lower chlorinated congeners.