摘要
Abstract
The use of surface flow constructed wetlands to improve and enhance the water quality of drinking water sources is a commonly used and effective measure in China.However,as the operating years increase,the effect of surface flow constructed wetlands on pollutants weakens,affecting the operational efficiency and becoming a key technical problem that urgently needs to be studied and solved.This article takes the surface flow constructed wetland of Gehu Lake as the research object.In response to the problem of the decreasing total nitrogen(TN)and permanganate index(CODMn)purification capacity of the surface flow constructed wetland year by year,a vertical physical and chemical property investigation of wetland sediment was carried out.The release law of sediment pollutants was quantitatively studied through indoor simulation experiments,and the concentration changes of nitrogen,phosphorus,and CODMn in the water body under different dredging depths were analyzed.A reasonable and feasible dredging depth was proposed for the treatment of sediment pollution in Gehu Lake wetland.关键词
表面流人工湿地/底泥疏浚/污染物释放/水质净化Key words
surface flow constructed wetland/sediment dredging/pollutant release/water purification分类
天文与地球科学
