河流底泥重金属污染研究进展

Research Progress and Prospects of Heavy Metal Pollution in River Sediment

随着经济和社会的发展,大量未经处理的污染物直接排入河道中,大多数重金属等污染物被泥沙吸附,沉积在河道底泥中。当外部条件发生变化时,底泥重金属会被重新释放出来,可能会造成水体的二次污染。在参考大量研究文献的基础上,对国内外底泥重金属样品检测、污染程度评价、迁移转化过程及污染物治理研究进行了系统总结。目前的研究忽视了重金属在沿底泥深度方向的分布及污染情况,没有形成多种污染评价方法的综合运用,对底泥重金属迁移转化过程的理论研究不足。

Along with the economic and social development,a large number of untreated pollutants is discharged directly into the river. Most of heavy metal pollutants will be adsorbed by sediment and subsided in river sediment. When the external conditions change,sediment heavy metal will be released again and may cause secondary pollution of water. Based on the references at home and abroad,it systematically summarized the sample testing of heavy metals in sediment,evaluation of the degree of pollution,the processes of migration and transformation,and pollutants gov-ernance. The results show that the current study neglects heavy metals’distribution and pollution along the sediment depth;there is no comprehen-sive application of various evaluation methods for pollution;theoretical studies of migration and transformation processes for heavy metals in sedi-ment are inadequate.