Removal of malachite green dye from wastewater by different organic acid-modified natural adsorbent: kinetics, equilibriums, mechanisms, practical application, and disposal of dye-loaded adsorbent
Abstract
Natural adsorbent (Cinnamomum camphora sawdust) modified by organic acid (oxalic acid, citric acid, and tartaric acid) was investigated as a potential adsorbent for the removal of hazardous malachite green (MG) dye in aqueous media in a batch process. The extent of MG adsorption onto modified sawdust increased with increasing organic acid concentrations, pH, contact time, and temperature but decreased with increasing adsorbent dosage and ionic strength. Kinetic study indicated that the pseudo-second-order kinetic model could best describe the adsorption kinetics of MG. Equilibrium data were found to fit well with the Langmuir model, and the maximum adsorption capacity of the three kinds of organic acid-modified sawdust was 280.3, 222.8, and 157.5 mg/g, respectively. Thermodynamic parameters suggested that the sorption of MG was an endothermic process. The adsorption mechanism, the application of adsorbents in practical wastewater, the prediction of single-stage batch adsorption system, and the disposal of depleted adsorbents were also discussed.
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- Authors
- Wang, H., Yuan, X., Zeng, G., Leng, L., Peng, X., Liao, K., Peng, L., & Xiao, Z.
- Affiliations
- Hunan University (CN)
- Corresponding author
- Yuan, Xingzhong
- Venue
- Environmental Science and Pollution Research
- Published
- 2014-06-11
- Volume
- 21
- Issue
- 19
- Pages
- 11552-11564
- ISSN
- 0944-1344 (ISSN-L)
- 1614-7499
- OpenAlex
- W2043978172
- Cited by
- 120
- References
- 37
- Citations by year
- 2026: 9 · 2025: 4 · 2024: 11 · 2023: 14 · 2022: 11 · 2021: 11 · 2020: 10 · 2019: 8 · 2018: 7 · 2017: 11 · 2016: 13 · 2015: 9 · 2014: 2
- FWCI
- 8.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Environmental Science and Pollution Research (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- malachite green, dye removal, wastewater treatment, natural adsorbents, oxalic acid, citric acid, tartaric acid, adsorption kinetics, pseudo-second-order kinetics, Langmuir isotherm, adsorption thermodynamics, adsorption mechanism, adsorbent regeneration
- MeSH terms
- Adsorption, Dust, Hydrogen-Ion Concentration, Kinetics, Rosaniline Dyes, Temperature, Thermodynamics, Water Pollutants, Chemical, Wood, Water Purification, Cinnamomum camphora, Wastewater
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