| 利用KOC*值判别杭州市地面水中多环芳烃污染来源 |
| 摘要点击 2614 全文点击 2196 投稿时间：2003-02-12 修订日期：2003-04-10 |
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| 中文关键词 地面水 多环芳烃 污染源判别 有机碳标化表观分配系数KOC* |
| 英文关键词 surface water PAHs sources survey organic carbon normalized apparent partition coefficient |
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| 中文摘要 |
| 测定了2002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KOC*.结果表明,地面水中PAHs总浓度范围为1.104～9.663μg·L-1,底泥中为132.7～7343μg·kg-1(干重),土壤为59.71～219.5μg·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KOC*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KKOC*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. |
| 英文摘要 |
| 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 (KOC*) were calculated. In Hangzhou Canal, K and KOC* values in sediments increased with downstream, and ratio of KOC* on sediment to KOC* 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 KOC* values in sediments decreased with the downstream, and the ratio of KOC* on sediment to KOC* 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. |
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