污染底泥原位覆盖技术综述

从污染底泥的危害入手,提出简单、有效且低成本的底泥原位覆盖技术.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.覆盖材料的粒径、比表面积和孔隙率、密度等特性关系到材料的吸附能力和对底泥污染物的阻隔和稳固作用,从而决定覆盖效果.选取覆盖材料及确定最佳覆盖厚度需要依据材料的这些特性.本文分析了原位覆盖技术的优缺点及适用条件和适用范围.介绍了几种常用的原位覆盖工程的施工方式及每种方式的优缺点,列举了大量的国内外覆盖工程实例,并就覆盖技术在我国良好的应用前景进行了分析.

In situ capping technology for remediation of contaminated sediment

This paper provided an overview on the adverse effects of contaminated sediment and on the in situ capping technology,a simply operated and low cost technology for the remediation of contaminated sediment.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.The characteristics of capping material,such as particle diameter,specific surface area,microporosity and density greatly correlate with the effect of remediation,which should be accorded with the optimum capping material selection and capping thickness determination.The advantages and disadvantages of in situ capping technology,as well as its applicable conditions and ranges were discussed.Several modes of in situ capping constructions,their excellence and shortcomings were introduced,and a great many of domestic and overseas successful in situ capping projects were illustrated.The prospects of in situ capping applied in China were analyzed.