Bioremediation of Eutrophic Water by the Controlled Cultivation of Water Hyacinths

文献类型： 外文期刊

第一作者： Zhang, Yingying

作者： Zhang, Yingying;Zhang, Zhiyong;Wang, Zhi;Liu, Haiqin;Wen, Xuezheng;Qin, Hongjie;Yan, Shaohua;Zhang, Yingying;Rittmann, Bruce E.

作者机构：

关键词： Bioremediation;Eutrophication;Water hyacinths;Nitrogen;Phosphorus

期刊名称：WORLD ENVIRONMENTAL AND WATER RESOURCES CONGRESS 2016: WATERSHED MANAGEMENT, IRRIGATION AND DRAINAGE, AND WATER RESOURCES PLANNING AND MANAGEMENT

ISSN：

年卷期： 2016 年

页码：

收录情况： SCI

摘要： A bioremediation project was carried out in an open ultra-eutrophic lake, Lake Caohai in 2011 to determine whether large-scale cultivation of water hyacinths could improve water quality. The coverage of water hyacinths reached an area of 4.30 km2 (211.0 kt) which is approximately 50% of lake area by November. After the controlled growth of water hyacinths, the concentrations of TN, NH4+-N, and TP decreased significantly in May and remained relatively stable from June to November. The abundance of DO and the decrease of NH4+-N concentrations can be benefit for fishes and aquatic ecosystems, and the decrease of TP concentrations may contribute to the reduction of phytoplantkton biomass. Assimilation by water hyacinths accounted for 64% of the removed N and 108% of the removed P, with the extra P coming from the sediments. The results demonstrated that large-scale water hyacinths can successfully reduce nitrogen and phosphorus loads in a eutrophic lake.

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