海绵城市生物滞留设施中土壤换填介质研究进展

RESEARCH PROGRESS ON SOIL REPLACEMENT MEDIUM IN BIOLOGICAL RETENTION FACILITIES FOR SPONGE CITY CONSTRUCTION

系统介绍了海绵城市生物滞留设施的主要功能与运行原理,对常见改良换填介质的主要优缺点进行比较,揭示了海绵城市设施中仅使用原有土壤的不足。重点对改良土壤换填介质的种类、结构及应用研究进展进行了综述,阐释了土壤换填介质对氮、磷、有机物及悬浮物等污染物的去除机制及其影响生物滞留设施去除污染物质的关键因素。针对海绵城市建设中传统生物滞留设施的不足,梳理国内外学者在换填介质组成与配比设计方面的研究进展,旨在提高对城市径流雨水中污染物质的去除效果,并对生物滞留设施未来发展方向提出了设想和展望。

This paper systematically reviewed the key structure and function mechanism for the biological retention facilities in sponge cities,while the advantages and shortcomings of the common improved replacement media were also analyzed.The disadvantages of using the single original soil in the sponge city facilities were proposed.The research progress for the structure and application of the improved soil replacement media was systematically reviewed.This paper further illustrated the removal mechanism of pollutants including nitrogen,phosphorus,organic matter,and suspended solids by the soil replacement media.The crucial factors that affect the removal of pollutants by the biological facility were also analyzed.In view of the shortage of traditional biological retention facilities in sponge city construction,the research progress in the composition and proportion design of replacement media by global scholars was summarized,aiming at improving the removal effect of pollutants in urban runoff and rainwater.This paper can also propose some ideas and prospects for the future development of bio-retention facilities.