Metal ions recovery from industrial effluents (Electroplating liquor) using polymeric chelating resins

Choong, Chin Ye (2007) Metal ions recovery from industrial effluents (Electroplating liquor) using polymeric chelating resins. Universiti Malaysia Sabah. (Unpublished)

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Abstract

In this study, poly(hydroxamic acid) (PHA) chelating resin was synthesized using poly(methyl acrylate) (PMA)-grafted sago starch. The PMA-grafted copolymer was obtained by a free-radical initiating process in which ceric ammonium nitrate was used as an initiator. Conversion of the ester groups of the PMA-grafted copolymer into hydroxamic acid was carried out by treatment of an ester in hydroxylamine in an alkaline solution. The functional groups in the resin were characterized by using FTIR. The PHA and poly(hydroxamic acid-amidoxime) (PHA-PA) chelating resin (obtained from Lutfor et al. (2001b) previous study) were used in the study of Zn²+ and Cr³+ removal from industrial effluents by batch and column techniques. The percentage recovery by PHA chelating resin was the highest at 98.30% in effluent containing chromium ions by batch technique. The percentage recovery by resins in column technique was lower due to the short time contact between the resins and the effluents. The overall percentage recovery of metal ions by both resins showed that the resins were able to remove metal ions from effluents. The absorbing capacity for PHA chelating resin by batch technique was high in 20 ml of effluent containing Zn²+ at 23.15mmolg�¹ while the absorbing capacity for the same resin in three other effluents (2A, B and C) containing Cr³+ were approximately the same at 15.18mmolg�¹ , 11.33mmolg�¹ and 11.14mmolg�¹, respectively. The absorbing capacity by column technique exhibited similar trend with batch technique indicating that the absorption capacities of both resins were dependent on the initial metal ion concentration present in the effluent and not the amount of effluent used. The recovery of the investigated metal ions from the absorbed resins was done by treating the resins in HCl 0.01M, 0.1M and 1M continuously. It was found that the cumulative percentage elution of Zn(II) from PHA-PA chelating resin was the highest at 97.2% while the percentage elution of Cr(III) from the same resin was also high at 81.6%. The cumulative percentage elution of Zn(II) and Cr(III) from PHA chelating resin was lower at 54.0% and 68.8%, respectively.

Item Type: Academic Exercise
Uncontrolled Keywords: Hydroxamic acid, Methyl acrylate, Sago starch, Ammonium nitrate, Hydroxamic acid-amidoxime
Subjects: ?? QD450-801 ??
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 03 Aug 2012 00:30
Last Modified: 23 Oct 2017 06:47
URI: http://eprints.ums.edu.my/id/eprint/4497

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