Journal
CARBOHYDRATE POLYMERS
Volume 199, Issue -, Pages 506-515Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.07.055
Keywords
Polysaccharide protein conjugation; Chitosan-lysozyme composite; Dye adsorption; Heavy metals; Hexavalent chromium; Methyl orange
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Funding
- Blaustein Center for Scientific Cooperation (Ben-Gurion University of the Negev)
- project StepPolyMem within the Italy-Israel Scientific and Technological Cooperation - Ministry of Science, Technology and Space of the State of Israel
- Italian Ministry of Foreign Affairs and International Cooperation [3-12401]
- United States-Israel Binational Science Foundation (BSF) [2014233]
- Canadian Associates of Ben-Gurion University of the Negev (CABGU) Quebec Region
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Developing efficient and cost-effective adsorbents for removing heavy metals and dyes from water streams is of utmost importance as prolonged human and animals consumption might lead to adverse health effects. In the present study, an environmentally-friendly bio-composite of a polysaccharide with a protein was prepared, by conjugating chitosan to lysozyme using glutaraldehyde as a crosslinker. We investigated the utility of this chitosan-lysozyme biocomposite (CLC) as an adsorbent for the removal of methyl orange (MO) dye and hexavalent chromium (Cr(VI)) ions from aqueous solutions. CLC showed excellent removal of MO and Cr(VI) along with concurrent removal of other heavy metals such as Cd(II) and Ni(II) ions from aqueous mixtures. The maximum adsorption capacities of CLC for MO and Cr(VI) were as high as 435 and 216 mg g(-1), respectively. This study demonstrates the potential use of conjugated biopolymers such as chitosan and lysozyme for water treatment applications.
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