Atia Asem A
Chemistry Department, Faculty of Science, Menoufia University, Egypt.
J Hazard Mater. 2006 Sep 21;137(2):1049-55. doi: 10.1016/j.jhazmat.2006.03.041. Epub 2006 Mar 29.
Glycidyl methacrylate/N,N'-methylene bis-acrylamide (GMA/MBA) was prepared and allowed to react with tetraethylenepentamine (TEP) to give glycidyl methacrylate amine resin (RPA) followed by treatment with glycidyl trimethylammonium chloride (GTA) to give glycidyl methacrylate resin bearing quaternary ammonium chloride moieties (RQA). Zeta potential measurements showed that RQA particles are positively charged over pH 2-10 indicating the strong basic nature of the quaternary amine sites. The effect of pH on the recovery of chromate by RPA and RQA was examined. The results indicated that RQA is an efficient sorbent for chromate from both acidic and basic media. The repeated use of RQA was tested through stripping the adsorbed chromate using a mixture of 0.05 NaOH and 2 M NaCl in the case of the uptake from acidic media and using 2 M NaCl solution in the case of alkaline solutions.
制备了甲基丙烯酸缩水甘油酯/N,N'-亚甲基双丙烯酰胺（GMA/MBA），并使其与四乙烯五胺（TEP）反应，得到甲基丙烯酸缩水甘油酯胺树脂（RPA），随后用缩水甘油基三甲基氯化铵（GTA）处理，得到带有季铵盐部分的甲基丙烯酸缩水甘油酯树脂（RQA）。ζ电位测量表明，RQA颗粒在pH值为2至10时带正电，表明季胺位点具有强碱性。研究了pH对RPA和RQA回收铬酸盐的影响。结果表明，RQA是一种从酸性和碱性介质中吸附铬酸盐的高效吸附剂。对于从酸性介质中吸附的情况，通过使用0.05 NaOH和2 M NaCl的混合物洗脱吸附的铬酸盐来测试RQA的重复使用；对于碱性溶液的情况，则使用2 M NaCl溶液进行测试。
