Cited by 312Adsorption and biosorption for pollutant removalEnvironmental remediation with nanomaterialsCoagulation and Flocculation Studies

Magnetic Activated Carbon Derived from Biomass Waste by Concurrent Synthesis: Efficient Adsorbent for Toxic Dyes

Cazetta, André L., Pezoti, Osvaldo, Bedin, Karen C., Silva, Taís L., Paesano Junior, Andrea, Asefa, Tewodros, Almeida, Vitor C.·2016·ACS Sustainable Chemistry & Engineering

Abstract

The development of advanced carbon nanomaterials that can efficiently extract pollutants from solutions is of great interest for environmental remediation and human safety. Herein we report the synthesis of magnetic activated carbons via simultaneous activation and magnetization processes using carbonized biomass waste from coconut shells (Cb’s) and FeCl 3 ·6H 2 O as precursor. We also show the ability of the materials to efficiently extract toxic organic dyes from solutions and their ease of separation and recovery from the solutions using a simple bar magnet. Textural characterization shows that the materials are microporous. Further analyses of the deconvoluted XPS spectra and X-ray diffraction patterns reveal that the materials possess magnetite, maghemite and hematite. SEM and TEM images show that an increase in the ratio of FeCl 3 ·6H 2 O:Cb leads to an increase in the material’s magnetic properties. The point of zero charge (pH pzc ) indicates that the materials have acidic characteristics. Adsorption kinetic studies carried out onto MAC1 indicates that the Elovich model can satisfactorily describe the experimental data at low initial concentrations and the pseudo-second order model can best fit the data at higher initial concentrations. Moreover, adsorption equilibrium studies reveal that the Langmuir model adequately allows the determination of the materials’ adsorption capacity. Our adsorption and equilibrium fit of the data include nonlinear models and are thus more informative compared with those in other recent, related works, in which only linear fits have been presented. Extensive mechanistic studies for the adsorption processes are also included in the work.

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Crossref · 10.1021/acssuschemeng.5b01141

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Authors
Cazetta, A. L., Pezoti, O., Bedin, K. C., Silva, T. L., Paesano Junior, A., Asefa, T., & Almeida, V. C.
Affiliations
  • Universidade Estadual de Maringá (BR)
  • Rutgers, The State University of New Jersey (US)
Corresponding author
  • Asefa, Tewodros
  • Almeida, Vitor C.
Venue
ACS Sustainable Chemistry & Engineering
Published
2016-01-29
Volume
4
Issue
3
Pages
1058-1068
ISSN
2168-0485 (ISSN-L)
OpenAlex
W2233638400
Cited by
312
References
64
Citations by year
2026: 16 · 2025: 27 · 2024: 27 · 2023: 26 · 2022: 38 · 2021: 45 · 2020: 42 · 2019: 35 · 2018: 29 · 2017: 18 · 2016: 9
FWCI
17.95
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Sustainable Chemistry & Engineering (publishedVersion)
  • Rutgers University Community Repository (Rutgers University) (submittedVersion)
Funders
  • Fundação Araucária
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
  • National Science Foundation (NanoEHS-1134289)
  • Center for Global Advancement and International Affairs, Rutgers University
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
  • Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
Keywords
magnetic activated carbon, FeCl3 activation, dye adsorption, magnetite, maghemite, hematite, adsorption kinetics, adsorption isotherms, adsorption mechanism, point of zero charge, microporous carbon, adsorbent regeneration, environmental remediation

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