Experimental Study on Nickel Removal in Ferrous Sulphate Solution by Ion Exchange Method
Based on the problem of nickel remove from ferrous sulphate solution with low nickel content,it was investigated by ion exchange process in this paper.Different factors,including resin filling capacity,pH,time,initial nickel content and so on,were investigated to explore the performance of nickel remove from ferrous sulphate solution by designed experiments.The results indicate that priority selectivity for nickel is presented in ferrous sulphate solution after resin adsorption and the operating capacity of CH-90 resin for nickel is 15 mg/g.After resin adsorption,Fe/Ni molar ratio is increased from 17:1 to 93:1 and removal rate on nickel reached 87％.Additionally,nickel content is reduced to 0.3 g/L.In other words,nickel is removed effectually from ferrous sulphate solution.The adsorption isotherms and adsorption kinetics were evaluated by changing the initial content and adsorption reaction time.It was found that the resin was in line with the Langmuir adsorption isotherm,and met the quasi-second-order kinetic equation.Furthermore,adsorption process was mainly controlled by ion exchange.
ion exchangenickel removalferrous sulphate solution
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