Adsorption, kinetic and thermodynamic studies for the biosorption of cadmium onto microalgae Parachlorella sp.

Dirbaz, Mahboobeh; Roosta, Aliakbar

doi:10.1016/j.jece.2018.03.039

Cited by 84 publications

(20 citation statements)

References 43 publications

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“…In that sense, Robati et al (2016) emphasized that if the value of enthalpy variation is positive, an endothermic adsorption process occurred, unlike the result of the present work. In turn, a negative value for Gibbs free energy indicates that the adsorption is spontaneous, which was observed in the present work and was reported by Dirbaz & Roosta (2018) and Pandiarajan et al (2018). Positive values for entropy, as shown here, indicate an increase of the system's disorder during the adsorption process at the sorbent-solution interface (Karthikeyan et al, 2012;Pandiarajan et al, 2018).…”

Section: Thermodynamic Adsorption Parameterssupporting

confidence: 89%

Efficiency of H2O2-treated eucalyptus biochar on the removal of Cu(II), Cd(II) and Ni(II) from aqueous solution

Souza

Pimenta

Silva

et al. 2020

Agraria

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The present work had the goal to produce H 2 O 2 -treated biochar from eucalyptus wood and testing its efficiency in the removal of heavy metals from aqueous solutions. Oxidizing treatment was performed by reacting biochar with H 2 O 2 (10% m/m) during 4 hours at pH 8.0 and 80 °C. Fresh and H 2 O 2 -treated biochar samples were characterized by thermogravimetry and elemental analysis. Point of zero charge and specific surface area were determined. Adsorption kinetics tests with Cu were carried out and Langmuir and Freundlich isotherms were adjusted. Adsorption tests were conducted with a mixture of Cu, Ni and Cd cations in aqueous solution. The best adsorption capacity was achieved in acid pH. H 2 O 2 -treated biochar had adsorption capacity of 170.41 mg L -1 for Cu alone and 305.35 mg L -1 for the mixture of metals. Adsorption was best predicted by the Langmuir isotherm (R 2 = 0.9976). Despite the significant decrease in the specific surface area, the H 2 O 2 -treated biochar showed better performance in the adsorption of heavy metals compared to the original biochar, especially in the presence of more than one metallic cation.

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Section: Thermodynamic Adsorption Parameterssupporting

confidence: 89%

Efficiency of H2O2-treated eucalyptus biochar on the removal of Cu(II), Cd(II) and Ni(II) from aqueous solution

Souza

Pimenta

Silva

et al. 2020

Agraria

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“…This observed surface morphology was attributed to surface precipitation of Cd 2+ , which was also reported to occur in Parachlorella sp. dried biosorbent when used to remove Cd from an aqueous solution containing 60 mg/L of Cd [16]. Energy spectra of pure biosorbent revealed traces of carbon (C), nitrogen (N), oxygen (O), sodium (Na), magnesium (Mg), silicate (Si), phosphorus (P), sulphur (S), and potassium (K).…”

Section: Scanning Electron Microscopy (Sem) and Energy-dispersive X-rmentioning

confidence: 99%

“…Experimental parameters such as pH, temperature (T), Cd 2+ concentration, as well as biosorbent performance after regeneration were investigated in batch mode. Results of this study were then compared to other studies using various macroalgae [3,[13][14][15] and microalgae biomass [6,[16][17][18]].…”

Section: Introductionmentioning

confidence: 99%

Batch Study of Cadmium Biosorption by Carbon Dioxide Enriched Aphanothece sp. Dried Biomass

Satya

Harimawan

Haryani

et al. 2020

Water

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The conventional method for cadmium removal in aqueous solutions (1–100 mg/L) is ineffective and inefficient. Therefore, a batch biosorption reactor using a local freshwater microalga (originating from an urban lake, namely, Situ Rawa Kalong-Depok) as dried biosorbent was tested. Biosorbent made from three kinds of cyanobacterium Aphanothece sp. cultivars (A0, A8, and A15) were used to eliminate cadmium (Cd2+) ions in aqueous solution (1–7 mg/L). The biosorbents were harvested from a photobioreactor system enriched with carbon dioxide gas of 0.04% (atmospheric), 8%, and 15% under continuous light illumination of about 5700–6000 lux for 14 d of cultivation. Produced dried biosorbents had Brunauer–Emmet–Teller (BET) surface area ranges of 0.571–1.846 m2/g. Biosorption of Cd2+ was pH and concentration dependent. Sorption was spontaneous (ΔG = −8.39 to −10.88 kJ/mol), exothermic (ΔH = −41.85 to −49.16 kJ/mol), and decreased randomness (ΔS = −0.102 to −0.126 kJ/mol. K) on the interface between solid and liquid phases when the process was completed. The kinetic sorption data fitted best to the pseudo-second-order model (k2 = 2.79 × 10−2, 3.96 × 10−2, and 4.54 × 10−2 g/mg.min). The dried biosorbents of A0, A8, and A15, after modeling with the Langmuir and Dubinin–Radushkevich isotherm models, indicated that cadmium binding occurred through chemisorption (qmax, D-R = 9.74 × 10−4, 4.79 × 10−3, and 9.12 × 10−3 mol/g and mean free energy of 8.45, 11.18, and 11.18 kJ/mol) on the monolayer and homogenous surface (qmax, Langmuir of 12.24, 36.90, and 60.24 mg/g). In addition, the results of SEM, EDX, and FTIR showed that there were at least nine functional groups that interacted with Cd2+ (led to bond formation) after biosorption through cation exchange mechanisms, and morphologically the surfaces changed after biosorption. Biosorbent A15 indicated the best resilient features over three cycles of sorption–desorption using 1 M HCl as the desorbing eluent. These biosorbents can be a potent and eco-friendly material for treating aqueous wastewater.

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“…This phenomenon is observed in the results presented in this study, as well as in others when using various biomasses such as bamboo stems (Akinyeye et al, 2020), microalgae Parachlorella sp. (Dirbaz & Roosta, 2018), and Aphanothece sp. (Satya et al, 2020) for the Cd +2 removal.…”

Section: Removal Of CD 2+mentioning

confidence: 98%

Elimination of Cadmium (II) in aqueaous solution using corn cob (Zea mays) in batch system: adsorption kinetics and equilibrium

Tejada-Tovar

Villabona-Ortíz

Ortega‐Toro

et al. 2021

RMIQ

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Adsorption, kinetic and thermodynamic studies for the biosorption of cadmium onto microalgae Parachlorella sp.

Cited by 84 publications

References 43 publications

Efficiency of H2O2-treated eucalyptus biochar on the removal of Cu(II), Cd(II) and Ni(II) from aqueous solution

Efficiency of H2O2-treated eucalyptus biochar on the removal of Cu(II), Cd(II) and Ni(II) from aqueous solution

Batch Study of Cadmium Biosorption by Carbon Dioxide Enriched Aphanothece sp. Dried Biomass

Elimination of Cadmium (II) in aqueaous solution using corn cob (Zea mays) in batch system: adsorption kinetics and equilibrium

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