Gemini surfactant: A novel flotation collector for harvesting of microalgae by froth flotation.
Gemini surfactant: A novel flotation collector for harvesting of microalgae by froth flotation.
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DOI：
10.1016/j.biortech.2018.12.106
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发表时间：
2019-03
影响因子：
11.4
通讯作者：
Zhiqiang Huang;Chen Cheng;Zuwen Liu;Wuhui Luo;Hong Zhong;G. He;Chang Liang;Liqing Li;Lanqing D
中科院分区：
文献类型：
--
作者：
Zhiqiang Huang;Chen Cheng;Zuwen Liu;Wuhui Luo;Hong Zhong;G. He;Chang Liang;Liqing Li;Lanqing D
泡沫浮选已被证明是一种有前景的商业规模微藻收获方法。然而，微藻浮选收获过程中所使用的表面活性剂均为传统的单体表面活性剂，其分子中含有一个相似的疏水性基团，导致收获效率较低。本研究制备了一种新型Gemini表面活性剂N，N′-双（十六烷基二甲基）-1,4-丁烷二溴化二铵（BCBD），最初推荐作为普通小球藻（Chlorella vulgaris）培养基泡沫浮选捕收剂。将BCBD的性能与传统的十六烷基三甲基溴化铵（CTAB）单体表面活性剂进行比较。实验结果表明，BCBD对普通小球藻具有良好的捕收能力。Gemini型BCBD捕收剂用量比单体CTAB捕收剂用量少5倍，浮选回收率提高21.4%，富集率提高22.9%，浮选效果明显优于单体CTAB捕收剂。
Froth flotation has been proved to be a promising approach for commercial scale harvesting of microalgae. However, all the surfactants used in the microalgae flotation harvesting process are conventional monomeric surfactants contain a single similar hydrophobic group in the molecule, which results in a low harvesting efficiency. In this work, a novel Gemini surfactant, N,N′-bis(cetyldimethyl)-1,4-butane diammonium dibromide (BCBD) was prepared, and originally recommended as a collector for froth flotation harvesting of Chlorella vulgaris from culture medium. The performance of BCBD was compared with the results acquired using its conventional monomeric surfactant cetyl trimethyl ammonium bromide (CTAB). The bench-scale flotation results showed that BCBD had excellent collecting power for Chlorella vulgaris. Achieving the obviously superior flotation harvesting performance (flotation recovery increased by 21.4% and enrichment ratio increased by 22.9), the dosage of Gemini type BCBD collector is five times less than that of monomeric CTAB collector.