Paper

Biosorption of Trivalent Chromium Using Ca-alginate Immobilized and Alkali-treated Biomass


Authors:
Taher Attiya Aboelazm; Ahmed M. Omer; Abdel Naby M. Salem; Reda A.I. Abou-Shanab; Mostafa M.H. Khalil
Abstract
Immobilized and alkali treated biomass showed a higher affinity towards trivalent chromium than live free biomass. Alginate, as a natural biopolymer, plays a key role in the removal of trivalent chromium. Alginate is a polysaccharide containing hydroxyl groups as function groups, which replace H2O molecules in [Cr(H2O)6]3+. In addition to that, chromium ions replace calcium ions in Ca-alginate matrices. Release of calcium ions in samples after treating with alginate is evidence of ion exchange. The removal percentages of trivalent chromium were 98.6, 98.5, 27 and 91.2% after treating 2 mM of chromium chloride hexahydrate solution with alginate free beads, alginate biomass beads, biomass live free and biomass live treated with Na2CO3, respectively. We reached the safe limit of discharge of trivalent chromium, which is lower than 5 ppm.
Keywords
Biosorption; Trivalent Chromium; Alginate Free Beads; Alginate Biomass Beads; Alkali Treated Biomass; Inductively Coupled Plasma Spectroscopy
StartPage
1
EndPage
6
Doi
10.5963/JCST0501001
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