Wang Xue-Tong, Xu Si-Yue, Wang Xi-Kui, Hu Bao-Ping, Jia Hao-Hao
Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
Chemosphere. 2017 Aug;180:302-311. doi: 10.1016/j.chemosphere.2017.04.037. Epub 2017 Apr 9.
In order to systematically investigate the spatial distribution, homologue profiles, and sources of short- and medium-chain chlorinated paraffins (SCCPs and MCCPs) in suburban soils in Shanghai, SCCPs and MCCPs in soils were analyzed using gas chromatography coupled with low resolution mass spectrometry in electron capture negative ion (ECNI) mode (GC-ECNI-MS). The CP concentrations in soils were between not detected (ND) - 697 ng g with a median value of 3.52 ng g for SCCPs, and ND - 666 ng g with a median value of 15.3 ng g for MCCPs, respectively. The concentrations of MCCPs in most soils were higher than that of SCCPs. The total CP concentrations (sum of SCCPs and MCCPs) in soils varied from ND to 964 ng g with a median value of 20.5 ng g. The concentration of MCCPs was higher than that of SCCPs in most soils. The levels of SCCPs and MCCPs in suburban soils in Shanghai were at the medium level when compared to other areas around the world. No significant correlation was observed between soil CP concentrations and total organic carbon contents (p > 0.05). For different use type of soils, the median concentrations of CPs in soils were found higher in greenland than that in other areas probably due to busy traffic, sewage sludge application and/or wastewater irrigation. All soils were divided into two groups by hierarchical cluster analysis (HCA) both for SCCPs and MCCPs. Three discharge sources of CPs in suburban soil of Shanghai were identified by PMF model.
为了系统地研究上海郊区土壤中短链和中链氯化石蜡（SCCPs和MCCPs）的空间分布、同系物分布及来源，采用气相色谱 - 电子捕获负离子模式低分辨质谱联用仪（GC - ECNI - MS）分析土壤中的SCCPs和MCCPs。土壤中CPs浓度分别为未检出（ND）至697 ng/g，SCCPs中位数为3.52 ng/g；ND至666 ng/g，MCCPs中位数为15.3 ng/g。大多数土壤中MCCPs的浓度高于SCCPs。土壤中CPs总浓度（SCCPs和MCCPs之和）为ND至964 ng/g，中位数为20.5 ng/g。大多数土壤中MCCPs浓度高于SCCPs。与世界其他地区相比，上海郊区土壤中SCCPs和MCCPs含量处于中等水平。土壤CPs浓度与总有机碳含量之间未观察到显著相关性（p > 0.05）。对于不同利用类型的土壤，绿地土壤中CPs的中位数浓度高于其他区域，这可能是由于交通繁忙、污水污泥施用和/或废水灌溉所致。通过层次聚类分析（HCA）将所有土壤的SCCPs和MCCPs分为两组。利用PMF模型确定了上海郊区土壤中CPs的三个排放源。
