生物滞留系统去除地表径流中的氮素研究评述

总结了近年来国内外应用生物滞留系统脱除降雨径流氮素的研究现状,从生物滞留系统脱氮效能、脱氮影响因素和脱氮机制3个方面论述了国内外主要研究进展和理论成果。提出了生物滞留系统脱氮的研究建议:加强生物滞留系统内氮素迁移转化驱动机制研究;推动生物滞留系统"宏观生境-运行效能-微生态系统"耦合响应体系研究;开展生物滞留系统功能植物关键分子生物学特征研究。

Summary of nitrogen removal in surface runoff by bioretention system

Bioretention system is known to be the main technology of the management of nitrogen in urban runoff, which is effective in removing a range of pollutants, including suspended solids, heavy metals, phosphorus, oil and grease, and fecal coliform. Nitrogen removal performance, however, has been highly variable. So, a better understanding of the efficiency and process of denitrification in bioretention system is of crucial importance for the control of nonpoint source pollution in urban area. In this paper, based on data collection and analysis, advances in denitrification processes of bioretention system, including denitrification performance, influence factors and mechanism, were summarized in detail. In the end of the paper, some related advices on future research were put forward in the following aspects: To further study the processes and drivers of nitrogen removal in bioretention system; to further study the coupling response relationship among macroscopic biotope, running performance and microecosystem; and to further carry out some experiments on identifying the key characteristic of function plants with molecular biology method.