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A novel modified graphene oxide/chitosan composite used as an adsorbent for Cr(VI) in aqueous solutions.
Int J Biol Macromol. 2016 Jun; 87:586-96.IJ

Abstract

A novel adsorbent for removal of hexavalent chromium (Cr(VI)) from aqueous solutions has been successfully prepared by modifying graphene oxide/chitosan composite with disodium ethylenediaminetetraacetate (EDTA-2Na) (GEC). This modified composite was characterized by various technologies; including scanning electron microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Batch adsorption experiments were carried out to evaluate the adsorption of Cr(VI) by GEC under different conditions. The results indicate that the adsorption of Cr(VI) on GEC was highly pH-dependent, with the highest adsorption capacity (86.17mg/g) occurring at pH 2. The kinetics of adsorption exhibited pseudo-second-order behavior. The adsorption data were well described by the Freundlich isotherm model. The adsorption capacity increased with increasing temperature. The calculated thermodynamic parameters indicate that the adsorption is a spontaneous, endothermic and feasible process. The further regeneration experiments showed the adsorption capacity of GEC for Cr(VI) decreased 5% after 7 times reuse, indicating the potential of the as-prepared material for practical application.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Zhang L
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Cluster of Ministry of Education, Guangzhou 510006, PR China.
Luo H
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Cluster of Ministry of Education, Guangzhou 510006, PR China. Electronic address: luohj@scut.edu.cn.
Liu P
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Cluster of Ministry of Education, Guangzhou 510006, PR China.
Fang W
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Cluster of Ministry of Education, Guangzhou 510006, PR China.
Geng J
School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Cluster of Ministry of Education, Guangzhou 510006, PR China.

MeSH

ChitosanChromiumGraphiteHydrogen-Ion ConcentrationKineticsOxidesSolutionsThermodynamicsWaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26993532

Citation

Zhang, Li, et al. "A Novel Modified Graphene Oxide/chitosan Composite Used as an Adsorbent for Cr(VI) in Aqueous Solutions." International Journal of Biological Macromolecules, vol. 87, 2016, pp. 586-96.
Zhang L, Luo H, Liu P, et al. A novel modified graphene oxide/chitosan composite used as an adsorbent for Cr(VI) in aqueous solutions. Int J Biol Macromol. 2016;87:586-96.
Zhang, L., Luo, H., Liu, P., Fang, W., & Geng, J. (2016). A novel modified graphene oxide/chitosan composite used as an adsorbent for Cr(VI) in aqueous solutions. International Journal of Biological Macromolecules, 87, 586-96. https://doi.org/10.1016/j.ijbiomac.2016.03.027
Zhang L, et al. A Novel Modified Graphene Oxide/chitosan Composite Used as an Adsorbent for Cr(VI) in Aqueous Solutions. Int J Biol Macromol. 2016;87:586-96. PubMed PMID: 26993532.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A novel modified graphene oxide/chitosan composite used as an adsorbent for Cr(VI) in aqueous solutions. AU - Zhang,Li, AU - Luo,Hanjin, AU - Liu,Peipei, AU - Fang,Wei, AU - Geng,Junjie, Y1 - 2016/03/15/ PY - 2015/12/02/received PY - 2016/03/09/revised PY - 2016/03/13/accepted PY - 2016/3/20/entrez PY - 2016/3/20/pubmed PY - 2016/12/15/medline KW - Adsorption KW - Chitosan KW - Cr(VI) KW - Graphene oxide KW - Modification SP - 586 EP - 96 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 87 N2 - A novel adsorbent for removal of hexavalent chromium (Cr(VI)) from aqueous solutions has been successfully prepared by modifying graphene oxide/chitosan composite with disodium ethylenediaminetetraacetate (EDTA-2Na) (GEC). This modified composite was characterized by various technologies; including scanning electron microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Batch adsorption experiments were carried out to evaluate the adsorption of Cr(VI) by GEC under different conditions. The results indicate that the adsorption of Cr(VI) on GEC was highly pH-dependent, with the highest adsorption capacity (86.17mg/g) occurring at pH 2. The kinetics of adsorption exhibited pseudo-second-order behavior. The adsorption data were well described by the Freundlich isotherm model. The adsorption capacity increased with increasing temperature. The calculated thermodynamic parameters indicate that the adsorption is a spontaneous, endothermic and feasible process. The further regeneration experiments showed the adsorption capacity of GEC for Cr(VI) decreased 5% after 7 times reuse, indicating the potential of the as-prepared material for practical application. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/26993532/A_novel_modified_graphene_oxide/chitosan_composite_used_as_an_adsorbent_for_Cr_VI__in_aqueous_solutions_ DB - PRIME DP - Unbound Medicine ER -