Trimeric Cationic Surfactant Coacervation as a Versatile Approach for Removing Organic Pollutants.
Trimeric Cationic Surfactant Coacervation as a Versatile Approach for Removing Organic Pollutants.
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DOI：
10.1021/acs.langmuir.1c00557
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
B. Liu;Weiwei Zhao;Yutan Shen;Yaxun Fan;Yilin Wang
中科院分区：
文献类型：
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作者：
B. Liu;Weiwei Zhao;Yutan Shen;Yaxun Fan;Yilin Wang
一种快速有效地去除废水中广谱染料污染物的通用方法是非常需要的。在这里，我们报道阳离子三聚亚胺表面活性剂（TISn）与带负电荷的水解聚丙烯酰胺（HPAM）的复合凝聚可以用于这一目的。在较宽的浓度和组成范围内发生凝聚，需要HPAM和TISn的浓度分别低至0.1 g/L和0.1 mM。经三聚体表面活性剂和HPAM处理的染料废水在湍流条件下30秒内完成相分离，对于负离子和中性染料，在剂量高达120 mg/L的情况下，产生极小体积分数（0.4%）的粘弹性凝聚和透明的上清，染料去除率高达99.9%。凝聚体中密集的分子排列和较厚的骨架是相分离速度快、体积分数低的主要原因。三聚亚胺表面活性剂/聚合物共聚为快速去除染料和其他有机污染物提供了一种简单、有效和可持续的方法。
A versatile method to remove a broad spectrum of dye pollutants from wastewater rapidly and efficiently is highly desirable. Here, we report that the complex coacervation of cationic trimeric imine-based surfactants (TISn) with negatively charged hydrolyzed polyacrylamide (HPAM) can be used for this purpose. The coacervation occurs in a wide concentration and composition range and requires the HPAM and TISn concentrations as low as 0.1 g/L and 0.1 mM, respectively. Dye effluents treated by trimeric surfactants and HPAM complete phase separation within 30 s under turbulent conditions, which generates an exceedingly small volume fraction (0.4%) of viscoelastic coacervate and a clear supernatant with a dye removal efficiency of up to 99.9% for anionic and neutral dyes in dosages of up to 120 mg/L. Crowded molecular arrangement and thick framework in coacervate are responsible for the rapid phase separation rate and low volume fraction. The trimeric imine surfactant/polymer coacervation provides a simple, effective, and sustainable approach for the rapid removal of dyes and other organic pollutants.