【摘要】 测定了 2 0 0 2年 12月杭州市钱塘江和运河杭州段地面水、底泥和土壤中 10种多环芳烃的含量 ,计算了底泥和土壤中PAHs富集倍数K和有机碳标化表观分配系数K OC.结果表明 ,地面水中PAHs总浓度范围为 1 10 4～ 9 6 6 3μg·L-1,底泥中为132 7～ 7343μg·kg-1(干重 ) ,土壤为 5 9 71～ 2 19 5 μg·kg-1(干重 ) ,污染较为严重 .钱塘江底泥PAHs的K值随水流而降低 ,而运河杭州段则增大 .钱塘江底泥和土壤的K OC比值接近 1,PAHs主要来自土壤淋溶输入 ,污染历史不长 .运河在城区 (如拱宸桥和卖鱼桥 )的K OC比值远大于 1,地面径流输入少 ,而工业排放输入多 ,且污染历史较长 .更多还原

【Abstract】 Ten polycyclic aromatic hydrocarbons (PAHs) were simultaneously measured in 9 surface water samples of Qiantang River and Hangzhou Canal in Hangzhou, China, in December of 2002. It was observed that the sum of PAHs concentrations ranged from 1.104 to 9.663 μg·L -1 in surface water, from 132.7 to 7343 μg·kg -1 dry sediments, and from 59.71 to 219.5 μg·kg -1 dry soils. The accumulative coefficients of PAHs in sediments and soils (K) and apparent partition coefficients normalized by solid organic carbon contents (K* OC) were calculated. In Hangzhou Canal, K and K* OC values in sediments increased with downstream, and ratio of K* OC on sediment to K* OC on soil were much larger than 1. Those indicated that Hangzhou Canal was heavily polluted by PAHs released from factory wastewater and PAHs in sediment were mainly sources of PAHs in surface water. In Qiantang River, K and K* OC values in sediments decreased with the downstream, and the ratio of K* OC on sediment to K* OC on soil near 1, and ratio f OC of sediment to f OC of soil approximate to 1, which showed that PAHs in Qiantang River were attributed to soil runoff.更多还原