Key Laboratory of lon Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China.
Environ Technol. 2014 Jan-Feb;35(1-4):340-6. doi: 10.1080/09593330.2013.828091.
Vermiculite and vermiculite modified with hydrochloric acid were investigated to evaluate their flocculation efficiencies in freshwater containing harmful algae blooms (HABs) (Microcystis aeruginosa). Scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, converted fluorescence microscope, plasma-atomic emission spectrometry, and Zetasizer were used to study the flocculation mechanism of modified vermiculite. It was found that the vermiculite modified with hydrochloric acid could coagulate algae cells through charge neutralization, chemical bridging, and netting effect. The experimental results show that the efficiency of flocculation can be notably improved by modified vermiculite. Ninety-eight per cent of algae cells in algae solution could be removed within 10 min after the addition ofmodified vermiculite clay. The method that removal of HABs with modified vermiculite is economical with high efficiency, and more research is needed to assess their ecological impacts before using in practical application.
研究了蛭石和经盐酸改性的蛭石，以评估它们在含有有害藻类水华（HABs）（铜绿微囊藻）的淡水中的絮凝效率。使用扫描电子显微镜、傅里叶变换红外光谱、X 射线衍射、转化荧光显微镜、等离子体原子发射光谱和 Zetasizer 研究了改性蛭石的絮凝机理。结果表明，盐酸改性蛭石可以通过电荷中和、化学桥联和网捕效应来凝聚藻类细胞。实验结果表明，改性蛭石可以显著提高絮凝效率。在添加改性蛭石粘土 10 分钟内，藻液中的藻细胞去除率可达 98%。用改性蛭石去除水华的方法具有高效经济的特点，但在实际应用前需要进一步研究其生态影响。
