Biosorption of Cu (II) by immobilized microalgae using silica: kinetic, equilibrium, and thermodynamic study
Abstract
Immobilized microalgae using silica (IMS) from Micractinium reisseri KGE33 was synthesized through a sol-gel reaction. Green algal waste biomass, the residue of M. reisseri KGE33 after oil extraction, was used as the biomaterial. The adsorption of Cu(II) on IMS was tested in batch experiments with varying algal doses, pH, contact times, initial Cu(II) concentrations, and temperatures. Three types of IMSs (IMS 14, 70, and 100) were synthesized according to different algal doses. The removal efficiency of Cu(II) in the aqueous phase was in the following order: IMS 14 (77.0%) < IMS 70 (83.3%) < IMS 100 (87.1%) at pH 5. The point of zero charge (PZC) value of IMS100 was 4.5, and the optimum pH for Cu(II) adsorption was 5. Equilibrium data were described using a Langmuir isotherm model. The Langmuir model maximum Cu(II) adsorption capacity (q m) increased with the algal dose in the following order: IMS 100 (1.710 mg g(-1)) > IMS 70 (1.548 mg g(-1)) > IMS 14 (1.282 mg g(-1)). The pseudo-second-order equation fitted the kinetics data well, and the value of the second-order rate constant increased with increasing algal dose. Gibbs free energies (ΔG°) were negative within the temperature range studied, which indicates that the adsorption process was spontaneous. The negative value of enthalpy (ΔH°) again indicates the exothermic nature of the adsorption process. In addition, SEM-energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) analyses of the IMS surface reveal that the algal biomass on IMS is the main site for Cu(II) binding. This study shows that immobilized microalgae using silica, a synthesized biosorbent, can be used as a cost-effective sorbent for Cu(II) removal from the aqueous phase.
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Temperature was shown to influence heavy metal absorption in several studies, which might be favorable or negative for the application in wastewater treatment.
“The temperature was shown to influence HM absorption in several studies, which might be favorable [90] or negative [91] for the application in WWT.”
From Microalgae-based wastewater treatment: Mechanisms, challenges, recent advances, and future prospects (2023) · cites this paper as [91]
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Microalgae-based wastewater treatment: Mechanisms, challenges, recent advances, and future prospects
Abdelfattah, A., Ali, S. S., Ramadan, H., El-Aswar, E. I., Eltawab, R., Ho, S.-H., Elsamahy, T., Li, S., El-Sheekh, M. M., Schagerl, M., et al. (2023) · Environmental Science and Ecotechnology · doi:10.1016/j.ese.2022.100205 · Cited by 812 · see citing works
“The temperature was shown to influence HM absorption in several studies, which might be favorable [90] or negative [91] for the application in WWT.”
BackgroundPotential use of algae for heavy metal bioremediation, a critical review
Zeraatkar, A. K., Ahmadzadeh, H., Talebi, A. F., Moheimani, N. R., & McHenry, M. P. (2016) · Journal of Environmental Management · doi:10.1016/j.jenvman.2016.06.059 · Cited by 595 · see citing works
- Authors
- Lee, H., Shim, E., Yun, H.-S., Park, Y.-T., Kim, D., Ji, M.-K., Kim, C.-K., Shin, W.-S., & Choi, J.
- Affiliations
- Korean Association Of Science and Technology Studies (KR)
- Yonsei University (KR)
- Kyungpook National University (KR)
- Corresponding author
- Choi, Jaeyoung
- Venue
- Environmental Science and Pollution Research
- Published
- 2015-05-09
- Volume
- 23
- Issue
- 2
- Pages
- 1025-1034
- ISSN
- 0944-1344 (ISSN-L)
- 1614-7499
- OpenAlex
- W261893115
- Cited by
- 33
- References
- 43
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 7 · 2019: 4 · 2018: 5 · 2017: 2 · 2016: 2
- FWCI
- 1.99
- 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 › Heavy Metal Pollution Remediation
- Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Keywords
- biosorption, copper removal, immobilized microalgae, silica, sol-gel synthesis, Langmuir isotherm, pseudo-second-order kinetics, adsorption thermodynamics, point of zero charge, heavy metal removal from water, biosorbent
- MeSH terms
- Adsorption, Chlorophyta, Copper, Hydrogen-Ion Concentration, Kinetics, Silicon Dioxide, Temperature, Thermodynamics, Water, Water Pollutants, Chemical, Spectroscopy, Fourier Transform Infrared, Biomass, Photoelectron Spectroscopy, Microalgae
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