永定河上游水体与底泥中污染物的分布规律

摘要

The distribution of pollutants in water and silt between Guanting Reservoir and Sanjiadian Reservoir along the upper Yongdinghe River is mainly controlled by the industrial and agricultural activities and the resident living style. Most of the detected pollutants in water, such as F, o,p'-DDT and benzo(a)pyrene etc, were rapidly degraded by natural agencies. Although the contents of the heavy metals in water are lower, the high concentration of them in silt indicates that change of physical chemistry environment may induce “chemical timing bomb". High concentration of PAHs in silt is caused by the use of organic fuel.%永定河上游官厅水库到三家店段水体和底泥淤积物中的污染物分布受上游工农业生产等人类活动控制。当人类活动较弱时，水体中绝大部分污染物自然降解明显，苯并(a)芘等一些有害组分的降解速率还十分迅速。虽然官厅水库水体中重金属元素低于国家标准，但河流淤泥中重金属元素聚集明显，淤泥中有引发“化学定时炸弹”的可能性。永定河上游河流底泥中大量多环芳烃污染物的积累情况说明，官厅水库上游及永定河沿途不充分燃烧的燃料可以导致水体的严重污染。