[目的]研究原位覆盖层厚度对污染底泥氮磷释放的影响.[方法]通过底泥氮磷释放控制模拟试验,研究了原位覆盖层厚度对富营养化水体底泥氮磷释放的影响.[结果]采用的天然覆土覆盖层可以有效地控制总氮和总磷的释放,覆土厚度对底泥氮磷释放的影响不大.模拟期间,覆盖系统对底泥氮磷释放的抑制率最高分别为87％和77％.[结论]该研究为地表富营养化水体底泥污染物的释放控制提供了理论指导和技术支撑.%[Objective] The research aimed to study influence of the in situ capping layer thickness on nitrogen and phosphorus release of the contaminated sediment. [Method] By simulation test of the nitrogen and phosphorus release control in sediment, influence of the in situ capping layer thickness on nitrogen and phosphorus release of the contaminated sediment was studied. [ Result ] Natural soil as capping layer could effectively control releases of the TN and TP. Thickness of the capping layer had small influence on nitrogen and phosphorus release of the contaminated sediment. During simulation period, the highest inhibition rates of the capping system on nitrogen and phosphorus release of the contaminated sediment were respectively 87% and 77% . [Conclusion] The research provided theoretical guidance and technique support for controlling pollutant release of the sediment in eutrophic water.
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