Document Detail

Recovery of hydrochloric acid from the waste acid solution by diffusion dialysis.
MedLine Citation:
PMID:  19059714     Owner:  NLM     Status:  MEDLINE    
Diffusion dialysis using a series of anion exchange membranes was employed to recover HCl acid from the waste acid solution. Effects of flow rate, flow rate ratio of water to feed, and Fe ion concentration on the recovery of HCl were investigated. It was found that the flow rate ratio was an important factor in the diffusion dialysis operation, and the recovered HCl concentration and Fe ion concentration in diffusate decreased significantly with the change of flow rate ratio from 0.4 to 1.7. In addition, the higher the Fe ion concentration in the feed, the higher the Fe leakage in the recovered acid solution. The HCl recovery efficiency was influenced not only by the recovered acid concentration, but also the outlet flow rate. While using the actual pot galvanizing waste HCl solution with the co-existence of 2.70 mol/L of Fe and 0.07 mol/L of Zn ions, over 88% HCl recovery efficiency could be achieved and Fe leakage was within the range of 11-23%. However, over 56% of Zn leakage was found due to the formation of negative Zn complexes in solution, which was unfavorable for the recovered acid reuse.
Jing Xu; Shuguang Lu; Dan Fu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-11-01
Journal Detail:
Title:  Journal of hazardous materials     Volume:  165     ISSN:  1873-3336     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-04-20     Completed Date:  2009-07-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  832-7     Citation Subset:  IM    
College of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, China.
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MeSH Terms
Conservation of Natural Resources / methods*
Hydrochloric Acid / isolation & purification*
Ion Exchange
Waste Disposal, Fluid / methods*
Reg. No./Substance:
7439-89-6/Iron; 7440-66-6/Zinc; 7647-01-0/Hydrochloric Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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