摘要
Abstract
Study was made on the enrichment efficiency of Cr(VI) in water with CTAB microemulsion -based gel (MBG) and the effects of some factors, such as the content of CTAB and nonionic surfactant, disposing time, temperature, pH and the concentration of different neutral salts, were investigated on the enrichment rate of O/W CTAB MBG. The results showed that CTAB MBG which was formed with oil - in - water microemulsion could effectively enrich Ct(VI) in water. The more the CTAB content was, the higher the enrichment rate of O/W CTAB MBG would be. Both of Tween 80 and Span 60 could increase the enrichment rate and the increase amplitude of the former was obviously higher than that of the latter when their contents were same. After disposed 8h, MBG got its enrichment balance. The enrichment rate would increase gradually with the increase of temperature when controlled under 25 ℃ or decrease gradually with the increase of pH of Ct(VI) solution in the range from 2.6 to 10.6 or with the increase of the concentration of neutral salts. When the content of CTAB in MBG and that of Tween 80 in EM, the temperature, disposing time and pH were 4.5％, 25％, 22 ℃, 8 h and 4.4,respectively, the enrichment rate of O/W CTAB MBG would be 23.3 mg/g.关键词
明胶/十六烷基三甲基溴化铵(CTAB)/微乳液凝胶/铬/富集Key words
Gelatin/ cetyltrimethylammonium bromide ( CTAB )/ microemulsion - based gel (MBG)/ chromium/ enrichment分类
化学化工
