State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
Sci Total Environ. 2018 Jun 1;626:458-467. doi: 10.1016/j.scitotenv.2018.01.093. Epub 2018 Feb 19.
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% NaCO)-calcination (450 °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.
首次研究了原位协同作用下改性膨润土颗粒（MBG）和苦草（V. spiralis）对杭州西湖底泥磷的去除效果。制备并表征了 CMBG-Na10-450（硝化（10% NaCO）-煅烧（450°C）联合改性），并在批实验中评估了 CMBG-Na10-450 与 V. spiralis 联合及单独作用时对各形态底泥磷的去除效果。结果表明，CMBG-Na10-450 可促进 V. spiralis 的生长，通过根供氧和营养分配改变未被 CMBG-Na10-450 吸附的底泥残留磷，进而增强对 CMBG-Na10-450 的额外磷吸附。MBG 和 V. spiralis 的组合表现出比单独使用 MBG 和 V. spiralis 的总和更高的协同去除效果。微宇宙实验结果表明，CMBG-Na10-450 和 V. spiralis 的组合通过增加属于埃希氏菌科的特殊属来增强磷代谢功能。
