表面流人工湿地中磷的季节性迁移转化规律

Seasonal Migration and Transformation of Phosphorus in Surface Flow Constructed Wetland

研究了上海市梦清园芦苇人工湿地中磷的季节性迁移转化规律,结果表明,该人工湿地中,基质吸附和沉降是湿地磷的主要去除方式,其对磷的去除量一直保持在总磷去除量的50%以上,春季可达92.08%,秋季最低也达57.81%。但由于基质的吸附作用偏弱,磷的沉降占主导地位。植物对磷的吸收量即去除量随季节变化比较明显,在夏、秋、冬三季,其可以占到总磷去除量的20%以上。此外,外界的磷源输入占总磷去除量的16%,因此,在开放性水处理系统中外界引起的磷污染问题也应引起重视。

Seasonal migration and distribution of phosphorus was studied in surface flow constructed Mengqingyuan artificial reed wetland.The result indicated that substrates adsorption and sedimentation were the main paths of phosphorus removal,which contributed to more than half of the total phosphorus removal content;in spring,they accounted for as high as 92.08%;while in autumn when the phosphorus removal content was the lowest,they accounted for 57.81%.And sedimentation was dominant in these two phosphorus removal paths.The absorption of plants differed from season to season;in summer,autumn and winter,it could contribute to more than 20% of the total phosphorus removal content.Meanwhile,atmospheric phosphorus deposition also accounted for 16% of the total phosphorus removal content,which must be paid attention to in the opening water treatment system design.