New Analytical Methods for Separation and Identification of Heavy Metals (Ⅱ). A Study on the Adsorption and Recovery of Cu(Ⅱ) ion by Amberlite XAD-7 Rrsins Impregnated with Chelating Agents 


Vol. 31,  No. 4, pp. 308-314, Aug.  1987


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  Abstract

중금속 이온의 흡착, 분리 및 회수에 적합한 킬레이트제 침윤수지의 조건을 조사하기 위하여 cupferron (CP), diphenylcarbazone (DPC), salicylaldoxime (SAO), thiosalicylic acid (TSA), 및 dimethylglyoxime (DMG)등의 킬레이트제를 선택하여 Amberite XAD-7 수지에 대한 흡착성을 조사하였다. 킬레이트제-XAD-7 침윤수지들을 만들고, 각 침윤수지들에 대한 Cu(Ⅱ) 이온의 흡착, 분리 및 회수능을 비교하였다. Cu(Ⅱ) 이온에 대해서 적절한 침윤수지로는 비교적 넓은 pH 영역에서 킬레이트제의 흡착이 안정하고 Cu(Ⅱ)와 넓은 pH 범위에서 정량적인 흡착을 보이는 SAO-XAD-7과 DMG-XAD-7 침윤수지임을 알았다. SAO-XAD-7 수지를 사용하여 Cu(Ⅱ) 이온을 공존하는 Ni(Ⅱ) 이온으로부터 분리하였다. Cu(Ⅱ)이온의 최적흡착량은 SAO-XAD-7 침윤수지의 경우는 수지 1g에 대해서 7 × 10-3mmol이며, DMG-XAD-7의 경우는 2 × 10-3mmol이다. 또한 흡착된 Cu(Ⅱ)이온. 1N HCl로 용출시켜 정량적으로 회수하였다. 한편 혼합 침윤수지에서의 Cu(Ⅱ)와 Ni(Ⅱ) 이온의 선택적 흡착성을 조사하였다. The adsorption behavior of some chelating agents on the Amberlite XAD-7 resin was studied to obtain the optimum conditions for the preparation of chelating agent-XAD-7 resins. The chosen chelating agents are cupferron (CP), diphenylcarbazone (DPC), salicylaldoxime (SAO), thiosalicylic acid (TSA), and dimethylglyoxime (DMG), which have been well known chelating agents to Cu(Ⅱ) and Ni (Ⅱ) ions. Among the chelating agent-XAD-7 resins, SAO-XAD-7 and DMG-XAD-7 resins were evaluated as appropriate impregnated resins by investigating their stabilities in the wide pH range and high abilities to adsorb Cu(Ⅱ) and Ni(Ⅱ) ions. The selective adsorption of Cu(Ⅱ) from Ni(Ⅱ) was possible by changing pH condition by SAO-XAD-7 resin. The adsorption capacities of SAO-XAD-7 and DMG-XAD-7 for Cu(Ⅱ) were 7 × 10-3mmol Cu(Ⅱ) per gram of resin and 2 × 10-3mmol Cu(Ⅱ) per gram of resin, respectively. The quantitative recovery of Cu(Ⅱ) adsorbed by the resin was demonstrated. The adsorption behavior of Cu(Ⅱ) and Ni(Ⅱ) by the single and mixed bed of chelating agent-XAD-7 resin was discussed.

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  Cite this article

[IEEE Style]

D. W. Lee, C. H. Eum, T. S. Kim, D. Shin, K. S. Chung, "New Analytical Methods for Separation and Identification of Heavy Metals (Ⅱ). A Study on the Adsorption and Recovery of Cu(Ⅱ) ion by Amberlite XAD-7 Rrsins Impregnated with Chelating Agents," Journal of the Korean Chemical Society, vol. 31, no. 4, pp. 308-314, 1987. DOI: .

[ACM Style]

Dai Woon Lee, Chul Hun Eum, Tae Sung Kim, Doo-Soon Shin, and Koo Soon Chung. 1987. New Analytical Methods for Separation and Identification of Heavy Metals (Ⅱ). A Study on the Adsorption and Recovery of Cu(Ⅱ) ion by Amberlite XAD-7 Rrsins Impregnated with Chelating Agents. Journal of the Korean Chemical Society, 31, 4, (1987), 308-314. DOI: .

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