珠江三角洲地区水体表层沉积物中多环芳烃的来源、迁移及生态风险评价Source, Transport and Risk Assessment of PAHs in Surface Sediments from Pearl River Delta
罗孝俊;陈社军;麦碧娴;曾永平;
摘要(Abstract)：
检测了珠江三角洲河流及南海近海表层沉积物中25种多环芳烃的含量．其含量范围为138-6793ng·g-1．主成分分析/多元回归分析结果表明,珠江三角洲水体沉积物中多环芳烃来源主要有石油排放,煤、木柴等低温燃烧排放,机动车尾气排放及生物成因．其相对贡献分别为石油排放占36％、煤、木柴燃烧占27％、机动车尾气占25％,自然来源占12％．珠江、东江河流沉积物中多环芳烃主要来源于区域内工业和生活废物的直接排入和机动车尾气的近距离沉降．西江沉积物中多环芳烃大气沉降是主要输入途径．南海沉积物中多环芳烃河流输入是主要途径．在多环芳烃由河流向海洋的输送过程中,茈可以作为一个有效指标示踪河流输送的多环芳烃．风险评价表明,东江及珠江部分河段沉积物可能存在着对生物的潜在危害,其它区域多环芳烃的生态风险处于较低水平．
关键词(KeyWords)： 多环芳烃;来源;迁移途径;风险评价;珠江三角洲
基金项目(Foundation): 国家自然科学基金(No．20507018,40525012);; 国家重点基础研究发展规划(973)项目(No．2003CB415002)
作者(Author): 罗孝俊;陈社军;麦碧娴;曾永平;
Email:
DOI:
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