Adsorption Of Methylene Blue from Aqueous Solution with Sulfuric Acid Activated Corn Cobs: Equilibrium, Kinetics, and Thermodynamics Assessment

Bozbeyoglu, Pinar; Duran, Celal; Baltacı, Cemalettin; Gündoğdu, Ali

doi:10.17350/hjse19030000193

Cited by 4 publications

(3 citation statements)

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“…The ΔH value can also help to decide whether the adsorption is chemical or physical. The enthalpy value of physical adsorption is generally not greater than 4 kJ/mol and for chemical adsorption not less than 20 kJ/mol [39,40]. The ΔH value is 12.0 kJ/mol (Table 4), which means that the adsorption of Cr(VI) ions on CCs-AC is slightly chemical rather than physical.…”

Section: Effect Of Temperature On the Adsorption Of Cr(vi) Ions Onto ...mentioning

confidence: 95%

Adsorption of hexavalent chromium from aqueous solution onto corn cobs – activated carbon

BOZBEYOGLU,

GÜNDOĞDU

2023

Turkish Journal of Analytical Chemistry

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This study evaluated the performance of a new activated carbon (CCs-AC) produced from corn cobs by boric acid activation for the effective removal of hexavalent chromium, a heavy metal with high potential to pollute the environment, from wastewater. For this purpose, with the help of parameters such as solution pH, contact time, initial Cr(VI) concentration, CCs-AC dose, desorption and temperature, the removal of Cr(VI) ions from aqueous solution by adsorption on CCs-AC was investigated from equilibrium, kinetic and thermodynamic point of view. As a result of the experiments, it was determined that the optimum solution pH was 2.0, the contact time was 4 hours, and the desorption solution was 3.0 M NaOH. From the kinetic data, it was determined that the adsorption was compatible with the pseudo-second order kinetic model and the maximum Cr(VI) adsorption capacity (123.7 mg/g) obtained from the Langmuir isotherm model showed that CCs-AC was of competitive quality with the literature. From the thermodynamic data, the positive ΔH value indicates that the adsorption is endothermic and the value of 12.00 kj/mol indicates that the adsorption is rather chemically driven. The negative ΔG value indicates that the process proceeds spontaneously with an increase in temperature, while the ΔS value indicates an increase in the amount of unused energy.

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Section: Effect Of Temperature On the Adsorption Of Cr(vi) Ions Onto ...mentioning

confidence: 95%

Adsorption of hexavalent chromium from aqueous solution onto corn cobs – activated carbon

BOZBEYOGLU,

GÜNDOĞDU

2023

Turkish Journal of Analytical Chemistry

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“…For the characterization of HS and HS-AC the effects of pH, contact time, temperature, and amount of adsorbateadsorbent as adsorption tests from aqueous solution were investigated in conjunction with equilibrium, kinetic, and thermodynamic parameters (Bozbeyoglu et al 2020).…”

Section: Equilibrium Kinetic and Thermodynamic Parametermentioning

confidence: 99%

“…Each trial was performed in at least three parallels, and the averages of the results were given. 1g with the help of the remaining adsorbate concentration (Ce) without being adsorbed in the solution (Gündoğdu 2010;Bozbeyoglu 2020).…”

Section: Adsorption Testsmentioning

confidence: 99%

Removal of Copper (II) from Mining Waste Water by Adsorption onto Activated Carbons Produced from Hazelnut Shell

BOZBEYOGLU

2023

Bulletin of Biotechnology

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Mining wastewater is one of the most important environmental problems today because of the heavy metal ions they contain. Wastewaters containing heavy metal pollution are generally acidic waters with low BOI (Biochemical oxygen demand) value. Various processes such as mineral processing waste disposal, illegal mining, domestic waste disposal, and others result in the release of heavy metals into the waters. One of the heavy metals that cause problems in terms of environmental pollution is copper. Copper metal is commonly found in metal and metal plating industry wastewater. Although metal industry wastewater is low in quantity, they are toxic waste. For this reason, industrial wastewater must be treated before being discharged into the receiving environment. In this study, the amount of Cu in wastewater of the mining operation in Gümüşhane was determined. Heavy metal pollution was eliminated with an adsorbent produced from agricultural biowaste. It has been tried to determine the amount of adsorbent, contact time, and treatment efficiency of wastewater at different pHs of activated carbon produced by chemical activation. As a result, an average of 88.7% efficiency was obtained with activated carbon activated with KOH, while 22,4% copper removal efficiencies were obtained with raw material (hazelnut shell) used without activation. It was determined that the appropriate working pH was 5,0; the amount of adsorbent was 0.05 g and Qmax 121,2. As a result, in this study, very low-cost adsorbents were produced using waste hazelnut shells, and a biotechnological approach was proposed to clean copper-containing wastewater.

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Characterization of the Adsorption Mechanism of Cadmium(II) and Methylene Blue upon Corncobs Activated Carbon

et al. 2022

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Adsorption Of Methylene Blue from Aqueous Solution with Sulfuric Acid Activated Corn Cobs: Equilibrium, Kinetics, and Thermodynamics Assessment

Cited by 4 publications

References 50 publications

Adsorption of hexavalent chromium from aqueous solution onto corn cobs – activated carbon

Adsorption of hexavalent chromium from aqueous solution onto corn cobs – activated carbon

Removal of Copper (II) from Mining Waste Water by Adsorption onto Activated Carbons Produced from Hazelnut Shell

Characterization of the Adsorption Mechanism of Cadmium(II) and Methylene Blue upon Corncobs Activated Carbon

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