人工湿地除磷研究进展

从人工湿地除磷机理着手,综述了国内外有关湿地基质、湿地植物及微生物强化除磷的研究机理以及进展。深入研究多种基质组合对磷素的吸附与解析机理,可以从理论上推进诸多高效除磷基质的实际应用进程;植物间接净化作用及其与湿地水力停留时间的关系,是影响湿地植物选种和种植的重要依据;植物根际微环境以及植物与微生物的耦合作用可能是人工湿地除磷的主要途径之一;强调湿地的污水净化功能而忽视其生态服务功能,是湿地运行中普遍存在的认识错误。最后指出：湿地运行应采取高水力负荷、低污染负荷的方式,强调强化一级处理的重要性。

Current researches and prospects of phosphorus removal in constructed wetland

The paper presented a review of current research progress and mechanism of the phosphorus removal in the constructed wetlands, in which the substrates, plants and microorganisms play the role of strengthening phosphorus removal. Overall literature analyses indicate that advanced research on the mechanism of sorption and desorption properties of the combined substrates can improve the effective removing phosphorus of the substrates and therefore, theoretically promote the progress of wetland application ; The relationship between the indirect removal potential of the plants and hydraulic retention time is an essential basis that affect the plant selection and its growth in wetlands ; The rhizosphere microsurroundings of the plants and coupling effects between microorganisms and plants may be one of the main ways to enhance the removal rate of phosphorus in wetlands; Much pursuit is focused on the purification function of sewage in wetlands while the ecological service function is sometimes neglected, which is incorrect understanding in the wetland performance. Finally the review points out that the applying manner should be high hydraulic load and low pollution load. Meanwhile the primary strengthening treatment is necessary to be emphasized.