Purification of pollutants by ecological floating-bed process for heavily polluted river
This paper mainly studied the characteristics of pollutants removal by ecological floating-bed for Linjiang River which was one of the heavily polluted branch rivers in Three-Gorges reservoir area. Ecological floating-bed employed ceramisite as the substrate. The removal effects of Total Nitrogen (TN), Total Phosphorus (TP) and Chemical Oxygen Demand (COD) and purification characteristics of floating-bed with two plants of canna indica and cyperus alternifolius were studied. The results showed that the plants grew well and floating-bed had good purification effects on heavily polluted water. During the spring and summer experiments, the average removal loadings of TN of canna indica and cyperus alternifolius were 1.01(g m-2d -1) and 0.84(g m-2·d -1) respectively; and those of TP were 0.179(gm-2·d-1) and 0.158(g m-2·d-1) respectively. During the autumn and winter experiments, the average removal loadings of the plants for TN and TP decreased to some extent. The canna indica floating-bed system had a good adaptability to heavily polluted river relatively under the experimental conditions. Absorption of plants was one of the important ways to remove nitrogen and phosphorus in the floating-bed system from the water. The contribution of absorption rate of the stems and leaves were higher than the roots of the plants in the floating-bed system.
Xiaoyi Xu Guyuan Luo Jianfeng Zheng Lianghua Han
Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education,Chongqing University,Chongqing, 400045; China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）