Maity Jayabrata, Ray Samit Kumar
Department of Polymer Science and Technology, University of Calcutta, 92, A.P.C, Road, Kolkata, 700009, India.
Department of Polymer Science and Technology, University of Calcutta, 92, A.P.C, Road, Kolkata, 700009, India.
Int J Biol Macromol. 2016 Aug;89:246-55. doi: 10.1016/j.ijbiomac.2016.04.036. Epub 2016 Apr 13.
Composite hydrogels were prepared by in situ incorporation of a natural macromolecule guar gum and nano sized bentonite clay in an acrylic network during copolymerization of acrylic acid, N,N-methylenebisacrylamide (MBA) and hydroxyethyl methacrlylate (HEMA) in water. The structure of the hydrogels was characterized and the hydrogels showing the best results in mechanical and swelling properties were used for the removal of low (5-50mg/L) and high (100-800mg/L) concentration of Cr(VI) ions from water. The composite hydrogel showed a high removal of 97.8% (4.89mg/g gel) and 91.4% (182.4mg/g gel) at an initial feed metal ion concentration of 5mg/L and 200mg/L, respectively.
在水相中，通过在丙烯酸、N,N-亚甲基双丙烯酰胺（MBA）和甲基丙烯酸羟乙酯（HEMA）共聚过程中原位引入天然大分子瓜尔胶和纳米膨润土，制备了复合水凝胶。对水凝胶的结构进行了表征，并将在机械性能和溶胀性能方面表现最佳的水凝胶用于去除水中低浓度（5 - 50mg/L）和高浓度（100 - 800mg/L）的Cr(VI)离子。当初始进料金属离子浓度分别为5mg/L和200mg/L时，复合水凝胶对Cr(VI)离子的去除率分别高达97.8%（4.89mg/g凝胶）和91.4%（182.4mg/g凝胶）。
