擴散透析에 의한 黃酸廢液으로부터 黃酸의 回收
Recovery of H₂SO₄ from Sulfuric Acid Wastes by Diffusion Dialysis
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음이온교환막을사용하는확산투석법으로폐H2SO4 용액으로부터 H2SO4을회수하는연구를수행하였다. 유속, 온도, H2SO4농도, 금속이온등이 H2SO4의회수율에미치는영향을조사하였다. H2SO4의회수율은유속과 H2SO4 농도가증가함에따라감소하였으며온도가높아짐에따라증가하였다. 물/H2SO4 용액의유속비가높아짐에따라 H2SO4의회수율이증가하였으나유속비가 1 이상에서는더이상증가하지않았다. Fe와 Ni의배제율은유속의영향을거의받지않았다. 유속을 0.26 l/hr-m2 로하여 4.5M 유리-H2SO4이존재하는폐H2SO4 용액으로부터 80% 의 H2SO4을회수할수있었으며이때회수산의 H2SO4 농도및순도는각각 4.3M, 99.8% 이었다.
Abstract
The recovery of H2SO4 from sulfuric acid waste was atempted by a difusion dialysis method using an anion exchange mem-brane. The effect of flow rate, temperature, concentration of metal ions on the recovery rate was studied. The recovery of H2SO4decreased with the concentration of H2SO4 and flow rate. The recovery increased with the flow rate ratio of water/H2SO4 solu-tion upto 1 above which no further increase was observed. The flow rate did not affect the rejection of Fe and Ni ions. As aresult, about 80% of H2SO4 could be recovered from sulfuric acid wastes which contains 4.5M free-H2SO4 at the flow rate of0.26 l/hr-m2. The concentration and purity of recovered H2SO4 was 4.3M and 99.8%, respectively.