长江中游沉积物中短链及中链氯化石蜡的分布、来源和生态风险评估
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- 英文论文题名：Short-and medium-chain chlorinated paraffins in sediments from the middle reaches of the Yangtze River:distributions,sources and ecological risks
- 论文作者：乔林 ; 高丽荣 ; 夏丹 ; 黄慧婷 ; 郑明辉
- 英文论文作者：Lin Qiao ; Lirong Gao ; Dan Xia ; Huiting Huang ; Minghui Zheng ; Research Center for Eco-Environmental Sciences ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院生态环境研究中心;
- 论文关键词：短链氯化石蜡 ; 中链氯化石蜡 ; 沉积物 ; 长江 ; 同类物分布
- 英文论文关键词：short-chain chlorinated paraffins ; medium-chain chlorinated paraffins ; sediments ; the Yangtze River ; congener patterns
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X132;X820.4
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：176k
- 原文格式：D
- 会议级别：全国
摘要
氯化石蜡(CPs)容易吸附到沉积物中,然后对生态系统和人类健康造成风险。在本研究中,我们用全二维气相色谱-飞行时间质谱对长江中游沉积物中氯化石蜡含量进行了分析。短链氯化石蜡(SCCPs)浓度范围是4.19 to 41.66 ng/g dw,中链氯化石蜡(MCCPs)从未检出到14.61 ng/g dw。空间分布特征表明氯化石蜡污染水平与人类活动密切相关。C10Cl6–7和C14Cl7–8是主要的同类物组。主成分分析表明SCCPs可能主要来自于商业混合物CP-42和CP-52的生产与使用。此外,氯化石蜡通过大气或河流的长距离迁移导致了沉积物中短链和低氯代同类物比例相比于工业品中有所增加。初步的风险评估表明当地氯化石蜡污染没有造成明显的生态风险。
Chlorinated paraffins(CPs) are easily adsorbed into sediments and then pose risks to the ecosystem and human health.In this study,sediments collected from the middle reaches of the Yangtze River were analyzed by two-dimensional gas chromatography coupled with time-of-flight mass spectrometry(GC×GC–TOFMS).The concentrations of SCCPs and MCCPs ranged from 4.19 to 41.66 ng/g dry weight(dw) and from n.d.to 14.61 ng/g dw,respectively.The spatial distributions showed that contamination levels of CPs were relevant to human activities.C10Cl6–7 and C14Cl7–8 were predominant congener groups.Principal component analysis(PCA) revealed that SCCPs may come from the production and use of CP-42 and CP-52.Moreover,long-range transportation of CPs via the atmosphere and/or river resulted in increased abundances of short chain and low chlorinated congeners in sediment samples compared with commercial mixtures.A preliminary risk assessment indicated that CPs posed no significant ecological risk currently.
Chlorinated paraffins(CPs) are easily adsorbed into sediments and then pose risks to the ecosystem and human health.In this study,sediments collected from the middle reaches of the Yangtze River were analyzed by two-dimensional gas chromatography coupled with time-of-flight mass spectrometry(GC×GC–TOFMS).The concentrations of SCCPs and MCCPs ranged from 4.19 to 41.66 ng/g dry weight(dw) and from n.d.to 14.61 ng/g dw,respectively.The spatial distributions showed that contamination levels of CPs were relevant to human activities.C10Cl6–7 and C14Cl7–8 were predominant congener groups.Principal component analysis(PCA) revealed that SCCPs may come from the production and use of CP-42 and CP-52.Moreover,long-range transportation of CPs via the atmosphere and/or river resulted in increased abundances of short chain and low chlorinated congeners in sediment samples compared with commercial mixtures.A preliminary risk assessment indicated that CPs posed no significant ecological risk currently.
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