Coacervation of oxidized glutathione with a cationic surfactant and the application in dye removal  

氧化型谷胱甘肽凝聚及其在染料去除中的应用

作　　者：Yue Zhang Yu Liu Li Zhao Ce Wang Baocai Xu 张月;刘玉;赵莉;王策;徐宝财(北京工商大学教育部老年营养与健康重点实验室,北京100048;北京工商大学轻工科学与工程学院,北京100048)

机构地区：[1]Key Laboratory of Geriatric Nutrition and Health(Beijing Technology and Business University),Ministry of Education,Beijing 100048,China [2]School of Light Industry Science and Engineering,Beijing Technology and Business University,Beijing 100048,China

出　　处：《日用化学工业（中英文）》2024年第12期1423-1430,共8页China Surfactant Detergent & Cosmetics

基　　金：国家自然科学基金资助项目(22008002);北京市属事业单位青年拔尖人才培养项目(BPHR2203049)。

摘　　要：Coacervation of oxidized glutathione(GSSG)and a cationic surfactant,didodecyldimethylammonium bromide(DDAB),was constructed mainly driven by the electrostatic and hydrophobic interactions.The pH-dependent coacervate of GSSG-DDAB(1∶4,mol/mol)was analyzed.Under acidic and neutral conditions,a turbid suspension of droplets is observed,and alkaline pH results in the phase separation of coacervates as the top phase.The coacervate phase exhibits good performance(extraction efficiency>85%)in extracting several dyes from water,including brilliant yellow,acid red 13,cresyl violet acetate,eriochrom blue SE,and 4-hydroxyazobenzene.The dyes are added into the suspension in acidic conditions.Then,the dyes are enriched and extracted along with the coacervates as the top phase when pH is adjusted to~10.Coacervation of GSSG with DDAB provides a simple approach to extract organic pollutants in wastewater treatment.在静电和疏水作用的共同驱动下,氧化型谷胱甘肽(GSSG)与阳离子表面活性剂十二烷基二甲基溴化铵(DDAB)混合发生凝聚,利用此凝聚过程可以实现从水中提取染料的目的。文章分析了GSSG-DDAB(摩尔比为1∶4)的凝聚作用随pH值的变化情况。结果发现在酸性和中性条件下,观察到形成了浑浊的液滴悬浮液,而在碱性pH值下发生分相,凝聚相作为上层自动分离出来。我们选用了5种带不同电荷的染料,包括亮黄、酸性红13、甲酚紫、铬蓝SE和4-羟基偶氮苯,染料在酸性条件下加入GSSG-DDAB悬浮液中,然后将pH值调至约10时,染料在凝聚相中富集,从体系中自发分离出来,漂浮在溶液表面,实现对染料的富集和去除,结果均表现出良好的去除效率(均超过85%)。GSSG与DDAB的凝聚作用为处理废水中有机污染物的提取提供了一种简单的方法。

关 键 词：COACERVATION oxidized glutathione dye removal electrostatic interaction hydrophobic effect 

分 类 号：TQ423[化学工程]