Biosorption of Cu(II) by immobilized microalgae using silica: kinetic, equilibrium, and thermodynamic study

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 v...

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Veröffentlicht in:Environmental science and pollution research international 2016-01, Vol.23 (2), p.1025-1034
Hauptverfasser: Lee, Hongkyun, Shim, Eunjung, Yun, Hyun-Shik, Park, Young-Tae, Kim, Dohyeong, Ji, Min-Kyu, Kim, Chi-Kyung, Shin, Won-Sik, Choi, Jaeyoung
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container_issue 2
container_start_page 1025
container_title Environmental science and pollution research international
container_volume 23
creator Lee, Hongkyun
Shim, Eunjung
Yun, Hyun-Shik
Park, Young-Tae
Kim, Dohyeong
Ji, Min-Kyu
Kim, Chi-Kyung
Shin, Won-Sik
Choi, Jaeyoung
description 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 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.
doi_str_mv 10.1007/s11356-015-4609-1
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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 %) &lt; IMS 70 (83.3 %) &lt; 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) &gt; IMS 70 (1.548 mg g⁻¹) &gt; 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. 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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.</description><subject>Adsorption</subject><subject>Algae</subject><subject>Aquatic microorganisms</subject><subject>Aquatic plants</subject><subject>Aquatic Pollution</subject><subject>Aqueous solutions</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Biomass</subject><subject>Biomaterials</subject><subject>Biomedical materials</subject><subject>biosorbents</subject><subject>Biosorption</subject><subject>Cellulose</subject><subject>Chlorophyta - metabolism</subject><subject>Copper</subject><subject>Copper - metabolism</subject><subject>cost effectiveness</subject><subject>Deoxyribonucleic acid</subject><subject>DNA</subject><subject>Earth and Environmental Science</subject><subject>Ecological Assessment and Remediation (CLEAR 2014) Conference: Environmental Pollution and Remediation</subject><subject>Ecotoxicology</subject><subject>energy-dispersive X-ray analysis</subject><subject>enthalpy</subject><subject>Environment</subject><subject>Environmental Chemistry</subject><subject>Environmental engineering</subject><subject>Environmental Health</subject><subject>equations</subject><subject>Equilibrium</subject><subject>Fourier transform infrared spectroscopy</subject><subject>Fourier transforms</subject><subject>Gibbs free energy</subject><subject>heat production</subject><subject>Heavy metals</subject><subject>Hydrogen-Ion Concentration</subject><subject>Kinetics</subject><subject>Land pollution</subject><subject>Metals</subject><subject>Micractinium</subject><subject>Microalgae</subject><subject>Microalgae - 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metabolism</topic><topic>Copper</topic><topic>Copper - metabolism</topic><topic>cost effectiveness</topic><topic>Deoxyribonucleic acid</topic><topic>DNA</topic><topic>Earth and Environmental Science</topic><topic>Ecological Assessment and Remediation (CLEAR 2014) Conference: Environmental Pollution and Remediation</topic><topic>Ecotoxicology</topic><topic>energy-dispersive X-ray analysis</topic><topic>enthalpy</topic><topic>Environment</topic><topic>Environmental Chemistry</topic><topic>Environmental engineering</topic><topic>Environmental Health</topic><topic>equations</topic><topic>Equilibrium</topic><topic>Fourier transform infrared spectroscopy</topic><topic>Fourier transforms</topic><topic>Gibbs free energy</topic><topic>heat production</topic><topic>Heavy metals</topic><topic>Hydrogen-Ion Concentration</topic><topic>Kinetics</topic><topic>Land pollution</topic><topic>Metals</topic><topic>Micractinium</topic><topic>Microalgae</topic><topic>Microalgae - metabolism</topic><topic>Nitrates</topic><topic>oils</topic><topic>pH effects</topic><topic>Photoelectron Spectroscopy</topic><topic>Remediation</topic><topic>Selected Papers from the 2nd Contaminated Land</topic><topic>Silica</topic><topic>Silicon Dioxide - 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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 %) &lt; IMS 70 (83.3 %) &lt; 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) &gt; IMS 70 (1.548 mg g⁻¹) &gt; 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.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>25953610</pmid><doi>10.1007/s11356-015-4609-1</doi><tpages>10</tpages></addata></record>
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1614-7499
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source MEDLINE; SpringerNature Journals
subjects Adsorption
Algae
Aquatic microorganisms
Aquatic plants
Aquatic Pollution
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Biomass
Biomaterials
Biomedical materials
biosorbents
Biosorption
Cellulose
Chlorophyta - metabolism
Copper
Copper - metabolism
cost effectiveness
Deoxyribonucleic acid
DNA
Earth and Environmental Science
Ecological Assessment and Remediation (CLEAR 2014) Conference: Environmental Pollution and Remediation
Ecotoxicology
energy-dispersive X-ray analysis
enthalpy
Environment
Environmental Chemistry
Environmental engineering
Environmental Health
equations
Equilibrium
Fourier transform infrared spectroscopy
Fourier transforms
Gibbs free energy
heat production
Heavy metals
Hydrogen-Ion Concentration
Kinetics
Land pollution
Metals
Micractinium
Microalgae
Microalgae - metabolism
Nitrates
oils
pH effects
Photoelectron Spectroscopy
Remediation
Selected Papers from the 2nd Contaminated Land
Silica
Silicon Dioxide - metabolism
sorption isotherms
Spectroscopy, Fourier Transform Infrared
Spectrum analysis
Temperature
Thermodynamics
Waste Water Technology
Water
Water Management
Water Pollutants, Chemical - metabolism
Water Pollution Control
X-radiation
X-ray photoelectron spectroscopy
X-ray spectroscopy
title Biosorption of Cu(II) by immobilized microalgae using silica: kinetic, equilibrium, and thermodynamic study
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