Selective removal of copper ions from multi-component aqueous solutions using modified silica impregnated with LIX 84

✍ Scribed by Jong Sung Kim; Jongheop Yi

• Publisher: Wiley (John Wiley & Sons)
• Year: 2000
• Tongue: English
• Weight: 81 KB
• Volume: 75
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(200005)75:5<359::aid-jctb223>3.0.co;2-m

✦ Synopsis

A silica support impregnated with 2-hydroxy-5-nonylacetophenone oxime (LIX 84) was prepared after surface modi®cation by g-aminopropyltriethoxysilane. Fixed-bed tests were conducted to investigate the capabilities of the prepared adsorbent with respect to the selective removal of copper ions from multi-metal solutions. Break-through curves were obtained using the modi®ed silica for a solution containing Cu 2 , Cd 2 , Ni 2 , Co 2 and Zn 2 , as well as an industrial electronics wastewater sample. The copper adsorption capacities for the multi-metal solution and the wastewater were 0.175 and 0.198 mmolg À1 , respectively under the conditions used in this study. The copper recovery ratios for the modi®ed silica treated with the multi-metal solution and the wastewater were 86 and 91%, respectively after treating with 0.1 moldm À3 HNO 3 . The results show that the modi®ed silica, prepared here, has potential value for the selective removal of copper ions from multi-component aqueous solutions containing multi-metals using a ®xed-bed reactor.