Nguyen, N V and Jeong, Jinki and Jha, Manis K and Lee, Jae-chun and Osseo-Asare, Kwadwo (2010) Comparative studies on the adsorption of Au(III) from waste rinse water of semiconductor industry using various resins. Hydrometallurgy, 105 (1-2). pp. 161-167.
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Comparative studies on the adsorption of gold from waste rinse water (Au 178.3 mg/L and trace Cu, Ni, Zn, Sn etc) of semiconductor manufacturing industry have been reported using non-ionic Amberlite XAD-7HP, strong base Bonlite BA304 and Purolite A-500. Batch and column studies were carried out to optimize various process parameters such as: contact time, acidity of solution, and resin dose for gold adsorption from waste rinse water and elution to get gold enriched solution. The results showed that Bonlite BA304 and Purolite A-500 resin could exchange gold easily at high acidity whereas Amberlite XAD-7HP adsorbs gold effectively at low acidity (adjusted pH = 0). Purolite A-500 was found to be the most suitable resin as it adsorbed 99.6% gold at A/R ratio of 8.33, and sorption capacity 53.6 mg gold/mL-resin. The mixture of acetone and hydrochloric acid at volumetric ratio 9.0 could elute gold loaded on Purolite A-500 resin to yield 10497 mg gold/L. The adsorption behavior of gold on Amberlite XAD-7HP and Bonlite BA304 followed the both Langmuir and Freundlich isotherms. In the case of Purolite A-500 resin, it followed suitably a Langmuir isotherm. Kinetic data for gold adsorption on the three resins followed a second-order-rate.
|Uncontrolled Keywords:||Gold recovery; Adsorption; Waste water; IX resins; Amberlite XAD-7HP; Purolite A-500; Bonlite BA304|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Sahu A K|
|Deposited On:||05 Oct 2010 17:30|
|Last Modified:||06 Feb 2012 17:09|
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