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Preparation and Application of Carboxylated Graphene Oxide Sponge in Dye Removal

Author

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  • Lianqin Zhao

    (School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China)

  • Sheng-Tao Yang

    (College of Chemistry and Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, China)

  • Shicheng Feng

    (College of Chemistry and Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, China)

  • Qiang Ma

    (College of Chemistry and Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, China)

  • Xiaoling Peng

    (College of Chemistry and Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, China)

  • Deyi Wu

    (School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China)

Abstract

Spongy graphene is a newly developed adsorbent of high performance for water treatment. Proper functionalization is an efficient approach to improve the adsorption capacity of graphene adsorbents. In this study, we prepared graphene oxide (GO), functionalized it with carboxyl groups to produce carboxylated GO (GO-COOH) dispersion, and lyophilized the GO-COOH dispersion to obtain the GO-COOH sponge. The adsorption isotherm, kinetics, thermodynamics, influencing factors, and regeneration of the adsorption of dye methylene blue (MB) on GO-COOH sponge were evaluated in batch experiments. The adsorption capacity of GO-COOH sponge was measured as 780 mg/g, which was nearly twice that of GO sponge (446 mg/g). The adsorption isotherm could be well described by the Freundlich model with a K F of 508 (L/mg) 1/n . The adsorption kinetic was nicely fitted by pseudo-first-order model with a k 1 of 0.00157·min −1 . In thermodynamics analysis, the negative Δ G indicated the spontaneous nature of adsorption on GO-COOH sponge. The adsorption process was endothermic and was driven by the increase of entropy. Higher pH benefited the removal of MB by GO-COOH sponge and the ionic strength had no meaningful effect. The regeneration was poor due to the strong electrostatic interaction between MB and the GO-COOH sponge. The results collectively suggested that carboxylation increased the adsorption performance of GO sponge.

Suggested Citation

  • Lianqin Zhao & Sheng-Tao Yang & Shicheng Feng & Qiang Ma & Xiaoling Peng & Deyi Wu, 2017. "Preparation and Application of Carboxylated Graphene Oxide Sponge in Dye Removal," IJERPH, MDPI, vol. 14(11), pages 1-13, October.
    • Handle: RePEc:gam:jijerp:v:14:y:2017:i:11:p:1301-:d:116537
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    References listed on IDEAS

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    1. Francis Moyo & Roman Tandlich & Brendan S. Wilhelmi & Stefan Balaz, 2014. "Sorption of Hydrophobic Organic Compounds on Natural Sorbents and Organoclays from Aqueous and Non-Aqueous Solutions: A Mini-Review," IJERPH, MDPI, vol. 11(5), pages 1-29, May.
    2. Nuhu Dalhat Mu’azu & Nabeel Jarrah & Mukarram Zubair & Omar Alagha, 2017. "Removal of Phenolic Compounds from Water Using Sewage Sludge-Based Activated Carbon Adsorption: A Review," IJERPH, MDPI, vol. 14(10), pages 1-34, September.
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    Cited by:

    1. Sana Farooq & Humera Aziz & Shafaqat Ali & Ghulam Murtaza & Muhammad Rizwan & Muhammad Hamzah Saleem & Shahid Mahboob & Khalid A. Al-Ghanim & Mian N. Riaz & Behzad Murtaza, 2022. "Synthesis of Functionalized Carboxylated Graphene Oxide for the Remediation of Pb and Cr Contaminated Water," IJERPH, MDPI, vol. 19(17), pages 1-18, August.
    2. Li Liu & Shisuo Fan & Yang Li, 2018. "Removal Behavior of Methylene Blue from Aqueous Solution by Tea Waste: Kinetics, Isotherms and Mechanism," IJERPH, MDPI, vol. 15(7), pages 1-16, June.
    3. Na Li & Jiyuan Fang & Ping Jiang & Cuihong Li & Haibo Kang & Wei Wang, 2022. "Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution," IJERPH, MDPI, vol. 19(5), pages 1-16, February.

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