Pb²+ removal from aqueous solution using crab shell treated by acid and alkali

In order to investigate the process of Pb(2+) removal by crab shell, the effects of pretreatment of crab shell with acid and alkali on Pb(2+) removal by crab shell were examined. In acid treatment of crab shell with HCl for the demineralization of crab shell, Ca(2+) and Mg(2+) in crab shell were lar...

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Bibliographic Details
Published in:Bioresource technology 2004-09, Vol.94 (3), p.345-348
Main Author: Kim, D.S
Format: Article
Language:English
Subjects:
acid treatment
Adsorption
alkali treatment
Animals
Biological and medical sciences
Brachyura - chemistry
chitin
crab shells
crabs
food processing wastes
Fundamental and applied biological sciences. Psychology
Hydrochloric Acid - chemistry
Hydroxides - chemistry
Kinetics
Korea
lead
Lead - chemistry
Microscopy, Electron
Potassium Compounds - chemistry
Sodium Hydroxide - chemistry
wastewater treatment
Water Purification - methods
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Summary:In order to investigate the process of Pb(2+) removal by crab shell, the effects of pretreatment of crab shell with acid and alkali on Pb(2+) removal by crab shell were examined. In acid treatment of crab shell with HCl for the demineralization of crab shell, Ca(2+) and Mg(2+) in crab shell were largely extracted during the acid treatment and the Pb(2+) removal by acid treated crab shell was very low. The total released Ca(2+) and Mg(2+) amounts in the alkali treated crab shell during Pb(2+) removal were not greatly different from those in the untreated crab shell. However, the times to reach an equilibrium state were quite shortened by alkali treatment and the reason was explained by transmission electron microscope.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2003.10.030