Research
| Title： | Synergistic removal effect of P in sediment of all fractions by combining the modified bentonite granules and submerged macrophyte |
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| First author： | Wang, Chuan; Liu, Zisen; Zhang, Yi; Liu, Biyun; Zhou, Qiaohong; Zeng, Lei; He, Feng; Wu, Zhenbin |
| Journal： | SCIENCE OF THE TOTAL ENVIRONMENT |
| Years： | 2018 |
| DOI： | 10.1016/j.scitotenv.2018.01.093 |
| Abstract： | The removal efficiency of sediment phosphorus (P) with the in-situ synergistic effect of modified bentonite granules( MBG) and Vallisneria spiralis (V. spiralis) in West Lake, Hangzhou, China was investigated for the first time in the study. CMBG-Na10-450 (nitrification (10% Na2CO3)-calcination (450 degrees C) combined modification) was prepared and characterized, and the removal effects of sediment P of all fractions with CMBG-Na10-450 and V. spiralis in combination and separately were evaluated in batch experiments. Results showed that CMBG-Na10-450 could promote the growth of V. spiralis, and the residual P of the sediment not adsorbed on CMBG-Na10-450 was changed through root oxygenation and nutrition allocation, and then enhanced the extra P adsorption on CMBG-Na10-450. The combination of MBG and V. spiralis exhibited a synergistic removal effect higher than the summation of MBG and V. spiralis applied separately. The results of microcosm experiments showed that the combination of CMBG-Na10-450 and V. spiralis enhanced the function of P metabolism by increasing the special genus that belongs to the family Erysipelotrichaceae. (C) 2018 Elsevier B.V. All rights reserved. |
