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Recovery of $H_2SO_4$from Sulfuric Acid Wastes by Diffusion Dialysis  

정진기 (한국지질자원연구원 자원활용연구부)
남철우 (한국지질자원연구원 자원활용연구부)
정강섭 (한국지질자원연구원 자원활용연구부)
이재천 (한국지질자원연구원 자원활용연구부)
Publication Information
Resources Recycling / v.11, no.1, 2002 , pp. 26-31 More about this Journal
Abstract
The recovery of $H_2$$SO_4$from sulfuric acid waste was attempted by a diffusion dialysis method using an anion extchange membrane. The effect of flow rate, temperature, concentration of metal ions on the recovery rate was studied. The recovery of $H_2$$SO_4$decreased with the concentration of $H_2$$SO_4$and flow rate. The recovery increased with the flow rate ratio of water/$H_2$$SO_4$solution upto 1 above which no further increase was observed. The flow rate did not affect the rejection of Fe and Ni ions. As a result, about 80% of $H_2$$SO_4$could be recovered from sulfuric acid wastes which contains 4.5M free$-H_2$$SO_4$at the flow rate of 0.26 $1/hr-m^2$. The concentration and purity of recovered $H_2$$SO_4$was 4.3M and 99.8%, respectively.
Keywords
Diffusion dialysis; Sulfuric acid wastes; Acid recovery; Membrane;
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