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Phosphorus removal from the hyper-eutrophic Lake Caohai (China) with large-scale water hyacinth cultivation

文献类型： 外文期刊

作者： Zhang, Yingying 1 ; Liu, Haiqin 1 ; Yan, Shaohua 1 ; Wen, Xuezheng 1 ; Qin, Hongjie 1 ; Wang, Zhi 3 ; Zhang, Zhiyong 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm Sci, Nanjing 210014, Jiangsu, Peoples R China

2.China Minist Agr, Key Lab Yangtze River Plain Agr Environm, Nanjing 210014, Jiangsu, Peoples R China

3.Chinese Acad Sci, Inst Geodesy & Geophys, Key Lab Environm & Disaster Monitoring & Evaluat, Wuhan 430077, Hubei, Peoples R China

关键词： Nutrient removal; Water restoration; Eichhornia crassipes; Phosphorus; Eutrophication

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期： 2019 年 26 卷 13 期

页码：

收录情况： SCI

摘要： A phytoremediation project involving the large-scale cultivation of water hyacinths (Eichhornia crassipes (Mart.) Solms) was conducted in Lake Caohai (China) from May to November during 2011-2013 to remove pollutants and decrease eutrophication. Water hyacinths were cultivated in two areas of Lake Caohai, Neicaohai, and Waicaohai, which are connected and function as a relatively independent water body. The areas for macrophyte growth varied in size from 4.30km(2) in 2011 to 0.85km(2) (2012) and 1.15km(2) (2013). Compared with historical data from 2007, the concentrations of total phosphorus decreased significantly, while dissolved oxygen concentrations increased slightly. After plant cultivation in 2011, the average concentrations of total phosphorus, total dissolved phosphorus, and phosphate anions decreased from 0.54, 0.35, and 0.23mgL(-1) upstream (river estuaries) to 0.15, 0.13, and 0.08mgL(-1) downstream (Xiyuan Channel), respectively. The amount of phosphorus assimilated by the macrophytes (44.31t) was more than 100% of the total removed phosphorus (40.93t) from lake water when water hyacinths covered 40.9% of the area, which could indicate sedimentary phosphorus release. Our study showed the great potential of utilizing water hyacinth phytoremediation to remove phosphorus in eutrophic waters.

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