Occurrences, sources and risk assessment of short- and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yellow River, China
文献类型：期刊论文
| 作者 | Qiao, Lin; Xia, Dan; Gao, Lirong; Huang, Huiting; Zheng, Minghui |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2016-12 |
| 卷号 | 219期号:0页码:483-489 |
| 关键词 | Short-chain chlorinated paraffins Medium-chain chlorinated paraffins Sediments The Yellow River Homolog patterns |
| 英文摘要 | Chlorinated paraffins (CPs), one class of hydrophobic and toxic compounds, are easily adsorbed into sediments and then pose potential risks to the ecosystem and human health. However, few researches on short- and medium-chain CPs (SCCPs and MCCPs) in sediments have been performed. In order to comprehensively investigate the spatial distributions, sources, and ecological risks of CPs, sediments collected from the middle reaches of the Yellow River were analyzed by two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC x GC-TOFMS). The concentrations of SCCPs and MCCPs ranged from 11.6 to 9.76 x 10(3) ng/g dry weight (dw) and from 833 to 168 ng/g dw, respectively. No significant correlation was found between total organic carbon (TOC) and CP concentrations (P > 0.05). The spatial distributions showed that contamination levels of CPs were relevant to human activities. In addition, two types of sediment samples were classified by hierarchical cluster analysis (HCA) and results indicated the predominant congener groups were C10Cl6-7 for SCCPs and C14Cl7-8 for MCCPs. Principal component analysis (PCA) revealed that SCCPs and MCCPs in the sediments may have different sources, and SCCPs are likely to come from the production and use of CP-42 and CP-52. Moreover, complex environmental processes, including long-range transportation via the atmosphere and/or river, deposition and degradation of CPs, resulted in increased abundances of short chain and low chlorinated congeners in sediment samples compared with commercial mixtures, and different homolog patterns among samples. The significant negative correlation between SCCP concentrations and MCCP/SCCP ratios could be related to long-range transport of CPs. A preliminary risk assessment indicated that CPs at current levels posed no significant ecological risk. (C) 2016 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35915]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Qiao, Lin,Xia, Dan,Gao, Lirong,et al. Occurrences, sources and risk assessment of short- and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yellow River, China[J]. ENVIRONMENTAL POLLUTION,2016,219(0):483-489. |
| APA | Qiao, Lin,Xia, Dan,Gao, Lirong,Huang, Huiting,&Zheng, Minghui.(2016).Occurrences, sources and risk assessment of short- and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yellow River, China.ENVIRONMENTAL POLLUTION,219(0),483-489. |
| MLA | Qiao, Lin,et al."Occurrences, sources and risk assessment of short- and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yellow River, China".ENVIRONMENTAL POLLUTION 219.0(2016):483-489. |
入库方式： OAI收割
来源：生态环境研究中心
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