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西江二恶英的季节变化、通量及来源 被引量：1

Seasonal Variation、Loading and Sources of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans (PCDD/Fs) in the West River,South China
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摘要 用同位素稀释-高分辨色谱/高分辨质谱(HRGC/HRMS)方法对西江(珠江的主干)进行了1a的水相和颗粒相中多氯代二苯并二恶英/呋喃(PCDD/Fs)测定。结果表明,水相中PCDD/Fs的含量范围在1.567～8.008 pg/L之间,颗粒物中PCDD/Fs的含量变化在569.4～279.6pg/g之间,经过分析得出其浓度随着西江流量的季节性变化呈现一定的变化规律,即在丰水期此污染物的浓度比在枯水期高。地表径流和干湿沉降对此有很大的贡献。西江中PCDD/Fs年通量为8.55kg,毒性当量通量(I-TEQ)为0.026kg。通过对同系物和同族物分布图对比显示西江PCDD/Fs来源比较复杂,可能是混合来源。其中大气干湿沉降、地表径流和沿岸与漂白有关的工业对此有很大的贡献,是PCDD/Fs进入西江的3个重要途径。 Concentration and temporal distribution of PCDD/Fs in both water and suspend particulate matter （SPM） were measured from September to June in the West River. The West River is the major tributary of the Pearl River, South China. Composition and distribution of PCDD/Fs exhibit temporal differences controlled by the discharge of the West River in the different seasons. Concentration of PCDDfFs in water samples and in SPM ranged from 1.567 to 8.008 pg/L and 569.4 to 4279.6 pg/g,respectively. The annual loadings of the total PCDD/Fs and I-TEQ of total PCDD/Fs were 8.55kg and 0.026kg. The comparison of homologues and congeners profiles yields the conclusion that the source of PCDD/Fs was mixed. The atmospheric deposition, run-off and industrial effluents are the most important pathways to load PCDD/Fs into the West River.
作者 刘艳霖 彭平安
机构地区 深圳信息职业技术学院计算机应用系 中国科学院广州地球化学研究所有机地球化学国家重点实验室
出处 《科技信息》 2009年第19期8-10,共3页 Science & Technology Information
基金 国家自然科学基金(40332019)
关键词 多氯代二苯并二恶英/呋喃(PCDD/Fs) 西江 年通量 毒性当量浓度 PCDD/Fs The West River Annual loading I-TEQ
分类号 X705 [环境科学与工程—环境工程] TV87 [水利工程—水利水电工程]
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参考文献10

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同被引文献18

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2009年 第19期

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