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| Synergistic removal of sediment P by combining the modified bentonite and Vallisneria spiralis |
| LIU Zi-sen1,2, ZHANG Yi1, WANG Chuan1,2, LIN Qing-wei1,2, MIN Fen-li1,2, ZHOU Qiao-hong1, LIU Bi-yun1, HE Feng1, WU Zhen-bin1 |
1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The removal efficiency of sediment phosphorus (P) with the in-situ synergistic effect of modified bentonite (MB) granules and Vallisneria spiralis (V. spiralis) in West Lake, Hangzhou, China was investigated for the first time in the study. Results showed that MB could promote the growth of V. spiralis, and the residual P of the sediment not adsorbed on MB was changed through root oxygenation and nutrition allocation, and then enhanced the extra P adsorption on MB. The combination of MB and V. spiralis exhibited a synergistic removal effect higher than the summation of MB and V. spiralis applied separately. The results of microcosm experiments showed that the combination of MB and V. spiralis enhanced the function of P metabolism by increasing the special genus that belongs to the family Erysipelotrichaceae.
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Received: 19 July 2017
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