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再悬浮持续时间对沉积物中PAHs释放的影响 被引量：5

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摘要 多环芳烃（polycyclic aromatic hydrocarbons,PAHs）是环境中广泛存在的一类有机污染物,溶解度低,疏水性强,容易被颗粒物吸附,并随其在沉积物中积累.蓄积在沉积物中的PAHs在沉积物再悬浮过程中会重新释放进入水体,造成二次污染.为了考察再悬浮持续时间对沉积物中PAHs释放的影响,采用沉积物再悬浮模拟装置在0.2和0.5N/m2剪应力的水动力条件下对长江武汉段沉积物再悬浮过程中PAHs的释放进行了研究.结果表明,随着再悬浮过程的持续,总悬浮颗粒物中PAHs浓度增加,0.5N/m^2下（37%）∑PAHs浓度增幅较0.2N/m^2（30%）大,菲及四环PAHs的增幅较其他11种PAHs大;上覆水体PAHs浓度不断增高,0.5N/m^2（50%）下∑PAHs浓度增幅大于0.2N/m^2（43%）,二环三环PAHs（50%-88%）增幅大于四环PAHs的增幅（20%-44%）;水体中PAHs浓度超过世界卫生组织规定的PAHs饮用水标准,存在健康风险.
作者 冯精兰 沈珍瑶 牛军峰 杨志峰
机构地区 北京师范大学环境学院水环境模拟国家重点实验室
出处 《科学通报》 EI CAS CSCD 北大核心 2008年第9期1045-1050,共6页 Chinese Science Bulletin
基金 国家重点基础研究发展计划(批准号:2003CB415204) 国家自然科学基金(批准号:40701166)资助项目
关键词 多环芳烃 长江 再悬浮 释放 再悬浮模拟装置
分类号 X52 [环境科学与工程—环境工程]
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参考文献26

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科学通报
2008年 第9期

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