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Acrylic acid functionalized graphene oxide: High-efficient removal of cationic dyes from wastewater and exploration on adsorption mechanism
Abstract
A novel p(AA)-g-GO material was prepared by grafting polymerization of acrylic acid (AA) onto graphene oxide (GO) skeleton, presenting efficient removal of dyes from wastewater, because the layer spacing of GO is expanded and successfully introduced numerous polar carboxyl groups. The study revealed a rapid adsorption kinetic process and the adsorption capacity for methylene blue (MB) increases with pH, contact time, initial dye concentration and temperature. The maximum adsorption capacity is about 1448.2 mg/g at 25 °C for MB according to the Langmuir isotherm. More importantly, the adsorbent maintains excellent adsorption capacity after five cycles of adsorption-desorption and has remarkable selective separability for methylene blue/methyl orange mixed solution at pH = 10. Furthermore, the equilibrium adsorption capacities for other cationic dyes as malachite green (MG), basic fuchsin (BF) and rhodamine B (RhB) reached 582.1, 571.7 and 437.1 mg/g, respectively. Additionally, the mechanism analysis indicated that electrostatic interactions, π-π conjugation and hydrogen bonding are the predominant forces for adsorbing cationic dyes. Therefore, p(AA)-g-GO is an outstanding adsorbent and has a potential application prospect in the treatment of dye wastewater.
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“Activated carbon is widely used to remove dyes from wastewater because of its convenience, ease of operation, simplicity of design, and reusability1–3,35–37.”
From The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon (2021) · cites this paper as [3]
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Metadata
- Authors
- Wang, G., Li, G., Huan, Y., Hao, C., & Chen, W.
- Affiliations
- Tiangong University (CN)
- Corresponding author
- Li, Guangfen
- Venue
- Chemosphere
- Publisher
- Elsevier BV
- Published
- 2020-12
- Volume
- 261
- Pages
- 127736
- ISSN
- 0045-6535 (ISSN-L)
- OpenAlex
- W3043988112
- Cited by
- 101
- References
- 44
- Citations by year
- 2026: 5 · 2025: 11 · 2024: 22 · 2023: 19 · 2022: 19 · 2021: 23 · 2020: 2
- FWCI
- 4.83
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Chemosphere (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (51378350)
- Natural Science Foundation of Tianjin City (17JCTPJC47000)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
- Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Keywords
- graft copolymerization, cationic dye adsorption, methylene blue, methyl orange, dye wastewater treatment, adsorption mechanism, Langmuir isotherm, adsorbent reusability, electrostatic interactions, π-π conjugation, hydrogen bonding, carboxyl groups
- MeSH terms
- Acrylates, Adsorption, Cations, Coloring Agents, Graphite, Methylene Blue, Rosaniline Dyes, Water Purification, Wastewater
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