【摘要】 近年来,洞庭湖富营养化、重金属问题对湖区生态系统造成了越来越严重的影响。为减轻洞庭湖污染现状,以本地芦苇、香蒲为湿地植物,以碎石为基质,构建水平潜流人工湿地对人工配制重金属及营养物污水进行处理。结果表明:间歇运行方式Ⅰ、Ⅱ和Ⅲ,在污水运行2 d后NH₄⁺-N去除率分别达到86. 9%、76. 7%和66. 7%,COD去除率在3 h后分别达到89. 6%、84. 9%和92. 9%;人工湿地连续运行结果显示,COD去除率在整个运行时段稳定在85%左右,NH₄⁺-N去除率最终稳定在78. 0%左右,运行44 d后Cd²⁺去除率高于99. 8%,Zn²⁺去除率在整个运行时段均高于96. 9%。更多还原

【Abstract】 In recent years,the problems of eutrophication and heavy metals in the Dongting Lake has caused significant impact on the lake ecosystem. In order to reduce the pollution of the Dongting Lake,Phragmites australis and Typha orientalis Presl were used as wetland plants and breakstone was used as a matrix in horizontal subsurface flow constructed wetland. Two operation modes including,intermittent and continuous,were applied to treat wastewater polluted by heavy metal and nutrients.The results showed that the removal rates of NH₄⁺-N reached 86. 9%,76. 7% and 66. 7% under the intermittent operation Ⅰ,Ⅱ and Ⅲ after 2 d,and the COD removal rate reached 89. 6%,84. 9% and 92. 9% with 3 h. The continuous operation results showed that the removal rate of COD was stable at about 85. 0% throughout the operation period,the removal rate of NH₄⁺-N was finally stabilized at about 78. 0%,the removal rate of Cd²⁺ was greater than 99. 8% after 44 days,and the removal rate of Zn²⁺ was kept 96. 9% above throughout the operation period.更多还原