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| Purification of Water in Zhushan Bay of Taihu Lake with Water Hyacinth Ecological Engineering |
| Received:September 21, 2014 |
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| KeyWord:ecological engineering;water hyacinth;nitrogen;phosphorus;purification effect |
| Author Name | Affiliation | E-mail | | LIU Guo-feng | Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China
Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences,Wuxi 214081, China | | | BAO Xian-ming | College of life science, Huaibei Normal University, Huaibei 235000, China | | | WU Ting-ting | Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | | | HAN Shi-qun | Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | shqunh@126.com | | XIAO Min | Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | | | YAN Shao-hua | Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | shyan@jaas.ac.cn | | ZHOU Qing | Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Science, Nanjing 210014, China | |
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| Abstract: |
| Ecological engineering measures, using fast-growing floating plants to purify polluted water, have become efficient and effective methods to restore water environment. Here, effects of water hyacinth on nutrient absorption and purification of water in Zhushan Bay, Taihu Lake, were investigated in 2011. Results showed that transparency, pH and oxygen deficit of water in hyacinth areas were not significantly different from those in no- hyacinth area, due to wave disturbance and strong water exchange. However, water hyacinth roots had a strong ability to absorb suspended solids and algae, and to reduce concentrations of TN and TP in water. Chlorophyll content of water was 77.97 mg·m-3 in August in the water hyacinth areas, while it was 84.40 mg·m-3 and 86.84 mg·m-3 at the edge of and in the area outside water hyacinth, respectively. Total biomass of water hyacinth was 20, 000 tons throughout the year, implying that a total of 19.8, 2.4, and 44.5 tons of N, P, and K were removed from the water, respectively. These results suggest using ecological engineering such as floating wetland planted with water hyacinth could remediate water in large area. |
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