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Recovery of Nitric Acid from Waste Solder Stripper by Diffusion Dialysis
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 Title & Authors
Recovery of Nitric Acid from Waste Solder Stripper by Diffusion Dialysis
Ryu, Seong-Hyung; Kim, Tae-Young; Ahn, Nak-Kyoon; Gang, Myeong-Sik; Ahn, Jae-Woo; Ahn, Jong-Gwan;
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A basic study was conducted to effectively recover nitric acid from a waste solder stripper by diffusion dialysis using anion exchange membranes. The effects of flow rate, flux ratio, nitrate concentration, and metallic ion types and concentration on the recovery percentage of nitric acid were investigated. The recovery percentage of nitric acid was decreased with the increase of flow velocity. But the recovery percentage of nitric acid was increased as the increase of flux ratio(W/F) and showing a recovery percentage of nitric acid of about 99% at a flux ratio of 1.5 or more. As the increase of nitric acid concentration in feed solution, the recovery percentage of nitric acid was increased up to 3.0M, but in case of greater than 3.0M, the recovery percentage gradually was decreased. Leakage percentage of metallic ions through the membrane were in the order of Pb, Na and Cu but Fe and Sn did not leakaged. As a result of diffusion dialysis using real waste solder stripper at a flow rate of , W/F
Spent solder;nitric acid;tin;recovery;diffusion dialysis;
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