Using hexadecyl trimethyl ammonium bromide (CTAB) modified clays to clean the Microcystis aeruginosa blooms in Lake Taihu, China
Using hexadecyl trimethyl ammonium bromide (CTAB) modified clays to clean the Microcystis aeruginosa blooms in Lake Taihu, China
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使用十六烷基三甲基溴化铵（CTAB）改性粘土净化中国太湖的铜绿微囊藻水华
DOI：
10.1016/j.hal.2010.02.004
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发表时间：
2010-05-01
期刊：
影响因子：
6.6
通讯作者：
Han, Shiqun
中科院分区：
文献类型：
--
作者：
Liu, Guofeng;Fan, Chengxin;Han, Shiqun
粘土在环境水清洁中是有用的，因为它们引起污染微生物的絮凝。为了开发一种减轻太湖有害藻华（HABs）危害的改良方法，以太湖沉积物为原料制备粘土，用十六烷基三甲基溴化铵（TAB）对粘土进行改性。研究了改性粘土对湖水中铜绿微囊藻水华的净化能力。利用M.对铜绿假单胞菌（Aaeruginosa）的培养结果表明，（TAB）改性粘土对Aaeruginosa藻细胞的抑制率为92%，最佳浓度为0.3g/L，且（TAB）的加入大大增强了粘土的抑制效果。细胞运动性的抑制是由于如在实验期间所观察到的絮凝引起的细胞聚集。通过扫描电子显微镜（SEM）观察，它还引起细胞溶解。粘土捕获的细胞的SEM图像表明，质膜的不可逆损伤，导致有害藻细胞的解体。研究结果表明，TAB改性粘土是一种有效的太湖水华控制措施和净化介质。它也可以用来清洁其他淡水湖。(C)2010爱思唯尔有限公司版权所有。
Clays are useful in environmental water cleaning because they cause flocculation of the contaminated microorganisms. In order to develop an improved method of mitigating the deleterious effect of harmful algal blooms (HABs) in Lake Taihu, China, we prepared clays from the sediments of the lake and modified the clays with hexadecyl trimethyl ammonium bromide ((TAB). The capability of the modified clays to clean the Microcystis aeruginosa blooms in the lake water was investigated. Using M. aeruginosa collected from the lake, the "jar tests" and sediment resuspension experiments showed that (TAB-modified clays inhibited 92% of the motility of the algal cells at an optimum concentration of 0.3 g/L, and the addition of (TAB greatly enhanced the effect of the clays. Inhibition of cell motility was due to cell aggregation by flocculation as visualized during the experiments. It also caused cell lysis as observed by scanning electron microscopy (SEM). The SEM image of clay-captured cells indicated the irreversible damages of the plasma membranes, which resulted in the disintegration of the harmful algal cells. Our study demonstrated that (TAB-modified clays may be an effective control measure and cleaning media for the water blooms in Lake Taihu. It also could be used to clean other freshwater lakes. (C) 2010 Elsevier B.V. All rights reserved.