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Activated carbon-containing alginate adsorbent for the simultaneous removal of heavy metals and toxic organics

Paper ID Volume ID Publish Year Pages File Format Full-Text
35796 45107 2007 7 PDF Available
Title
Activated carbon-containing alginate adsorbent for the simultaneous removal of heavy metals and toxic organics
Abstract

By combining two functions of alginate gel and activated carbon, an activated carbon-containing alginate bead (AC-AB) adsorbent was developed and successfully used to simultaneously remove heavy metal ions and toxic organics. Quantitative analysis showed that almost all of the adsorption of toxic organics, such as p-toluic acid, is caused by the activated carbon in the AC-AB adsorbent, whereas the alginate component has a major role in the removal of heavy metals. A 50-L solution containing eight heavy metals (Pb2+, Mn2+, Cd2+, Cu2+, Zn2+, Fe2+, Al3+ and Hg2+) and four mineral ions was run continuously through a filter cartridge packed with 160 g of the AC-AB adsorbent. The adsorbent showed a high capacity to remove heavy metals completely from the water, while allowing essential minerals, such as K+, Na+, Mg2+ and Ca2+, to pass through the filter. The adsorbent could be regenerated using eluents, such as HNO3, and reused repeatedly without considerable loss of its metal uptake capacity through 10 subsequent cycles of adsorption and desorption. With its high capacity and high selectivity for toxic heavy metals, the AC-AB adsorbent has enormous potential for application in drinking water treatment technologies.

Keywords
Alginate; Activated carbon; Heavy metal; Adsorption; Water treatment
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Activated carbon-containing alginate adsorbent for the simultaneous removal of heavy metals and toxic organics
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 10, October 2007, Pages 1371–1377
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us