【摘要】 人工湿地因其基建投资少、运行管理简单、生态效益高、降解污染物能力强和适用范围广等优点在水处理领域得到广泛应用。湿地基质的材料特性及配置方式对湿地的运行效果产生重要影响,然而目前对于基质去除污染物的作用机制尚未见归纳总结。通过综述近些年人工湿地基质方面的相关研究进展,从物化反应及生物化学反应等多角度对基质去除污染物的作用机制进行了探讨,并总结了非基质类外源汇入颗粒对湿地功能的影响,最后对人工湿地基质研究领域今后的发展方向做出展望,以期对未来湿地科学的研究和工程设计提供理论支持。更多还原

【Abstract】 Constructed wetlands are widely used in water treatment due to their low capital investment,the convenience of operation and management,its ecological benefits,efficiency of pollutants removal and its wide applicability in many fields. The properties and configuration of substrates are critical to determine the operation effectiveness of wetlands,but the mechanism of contaminants removal by substrates has not yet been summarized so far. This paper reviews the advance in researches on substrates applied in constructed wetlands in recent years,and emphatically discusses the mechanism of pollutants degradation from physical,chemical and biochemical reactions. Additionally,the influences towards the function of wetland substrates caused by the input of non-substrate granules are examined. Finally,the prospect of future development on wetland substrates is provided as possible theoretical support for wetland science and engineering design in future.更多还原