When doing capping, some clean materials are placed on the top of contaminated sediment to control the pollution of contaminated sediment by fence, fixation and absorption.

• 该技术将无污染的清洁材料铺盖到污染底泥上，通过覆盖材料对污染物的阻隔、稳固和吸附作用来有效控制底泥污染物。