Alginate-graphene oxide hybrid gel beads: An efficient copper adsorbent material

Wafa Algothmi; Narasimha Bandaru; Yang Yu; Joseph Shapter; Amanda Ellis

doi:10.1016/j.jcis.2013.01.051

Alginate-graphene oxide hybrid gel beads: An efficient copper adsorbent material

Wafa Algothmi, Narasimha Bandaru, Yang Yu, Joseph Shapter, Amanda Ellis

Research output: Contribution to journal › Article › peer-review

201 Citations (Scopus)

Abstract

Here we report on the adsorption performance of calcium alginate (Ca-Alg₂) and Ca-Alg₂ with encapsulated graphene oxide (Ca-Alg₂/GO) gel bead adsorbents for the successful removal of Cu²⁺ ions from aqueous solution. Different adsorbent doses, Cu²⁺ concentrations and contact times were investigated using equilibrium and kinetic studies. The adsorbents were characterized using Fourier transform-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and focussed ion beam scanning electron microscopy (FIB/SEM). The equilibrium adsorption data were fitted to Langmuir isotherms and the maximum adsorption capacities of the Ca-Alg₂ and Ca-Alg₂/GO gel beads were found to be 42.7mgg^-1 and 60.2mgg^-1, respectively. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic equation showing that the Ca-Alg₂ gel beads had a higher kinetic adsorption rate at 0.0425gmg^-1min^-1 compared to Ca-Alg₂/GO at 0.0179gmg^-1min^-1.

Original language	English
Pages (from-to)	32-38
Number of pages	7
Journal	Journal of Colloid and Interface Science
Volume	397
DOIs	https://doi.org/10.1016/j.jcis.2013.01.051
Publication status	Published - 1 May 2013

Keywords

Alginate
Copper adsorption
Gel beads
Graphene oxide
Kinetics

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10.1016/j.jcis.2013.01.051

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title = "Alginate-graphene oxide hybrid gel beads: An efficient copper adsorbent material",

abstract = "Here we report on the adsorption performance of calcium alginate (Ca-Alg2) and Ca-Alg2 with encapsulated graphene oxide (Ca-Alg2/GO) gel bead adsorbents for the successful removal of Cu2+ ions from aqueous solution. Different adsorbent doses, Cu2+ concentrations and contact times were investigated using equilibrium and kinetic studies. The adsorbents were characterized using Fourier transform-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and focussed ion beam scanning electron microscopy (FIB/SEM). The equilibrium adsorption data were fitted to Langmuir isotherms and the maximum adsorption capacities of the Ca-Alg2 and Ca-Alg2/GO gel beads were found to be 42.7mgg-1 and 60.2mgg-1, respectively. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic equation showing that the Ca-Alg2 gel beads had a higher kinetic adsorption rate at 0.0425gmg-1min-1 compared to Ca-Alg2/GO at 0.0179gmg-1min-1.",

keywords = "Alginate, Copper adsorption, Gel beads, Graphene oxide, Kinetics",

author = "Wafa Algothmi and Narasimha Bandaru and Yang Yu and Joseph Shapter and Amanda Ellis",

year = "2013",

month = may,

day = "1",

doi = "10.1016/j.jcis.2013.01.051",

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AU - Algothmi, Wafa

AU - Bandaru, Narasimha

AU - Yu, Yang

AU - Shapter, Joseph

AU - Ellis, Amanda

PY - 2013/5/1

Y1 - 2013/5/1

N2 - Here we report on the adsorption performance of calcium alginate (Ca-Alg2) and Ca-Alg2 with encapsulated graphene oxide (Ca-Alg2/GO) gel bead adsorbents for the successful removal of Cu2+ ions from aqueous solution. Different adsorbent doses, Cu2+ concentrations and contact times were investigated using equilibrium and kinetic studies. The adsorbents were characterized using Fourier transform-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and focussed ion beam scanning electron microscopy (FIB/SEM). The equilibrium adsorption data were fitted to Langmuir isotherms and the maximum adsorption capacities of the Ca-Alg2 and Ca-Alg2/GO gel beads were found to be 42.7mgg-1 and 60.2mgg-1, respectively. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic equation showing that the Ca-Alg2 gel beads had a higher kinetic adsorption rate at 0.0425gmg-1min-1 compared to Ca-Alg2/GO at 0.0179gmg-1min-1.

AB - Here we report on the adsorption performance of calcium alginate (Ca-Alg2) and Ca-Alg2 with encapsulated graphene oxide (Ca-Alg2/GO) gel bead adsorbents for the successful removal of Cu2+ ions from aqueous solution. Different adsorbent doses, Cu2+ concentrations and contact times were investigated using equilibrium and kinetic studies. The adsorbents were characterized using Fourier transform-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and focussed ion beam scanning electron microscopy (FIB/SEM). The equilibrium adsorption data were fitted to Langmuir isotherms and the maximum adsorption capacities of the Ca-Alg2 and Ca-Alg2/GO gel beads were found to be 42.7mgg-1 and 60.2mgg-1, respectively. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic equation showing that the Ca-Alg2 gel beads had a higher kinetic adsorption rate at 0.0425gmg-1min-1 compared to Ca-Alg2/GO at 0.0179gmg-1min-1.

KW - Alginate

KW - Copper adsorption

KW - Gel beads

KW - Graphene oxide

KW - Kinetics

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DO - 10.1016/j.jcis.2013.01.051

M3 - Article

SN - 0021-9797

VL - 397

SP - 32

EP - 38

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

Alginate-graphene oxide hybrid gel beads: An efficient copper adsorbent material

Abstract

Keywords

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