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

Gündoğdu, Ali; Bozbeyoglu, Pinar; İmamoğlu, Mustafa; Baltacı, Cemalettin; Duran, Celal; Bulut, Volkan Numan

doi:10.1080/00032719.2022.2098310

Cited by 4 publications

(3 citation statements)

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“…As reported in the literature, CCs-AC produced by boric acid activation was characterized by many parameters such as proximate-ultimate analysis, Boehm titration, pH-pHpzc determination, SEM images (Fig. 1), IR spectra and surface characterization analysis [19]. Fig.…”

Section: Preparation Production and Characterization Of Ccs-acmentioning

confidence: 91%

“…60 g CCs and 60 g boric acid (H3BO3) were mixed in 700 mL distilled/deionized water. The resulting mixture was converted into activated carbon by pyrolysis at 700 °C in N2 atmosphere as detailed in the literature and labeled as CCs-AC (corn cobs -activated carbon) [19].…”

Section: Preparation Production and Characterization Of Ccs-acmentioning

confidence: 99%

“…When the literature is reviewed, it is observed that activated carbons with different properties have been produced from corn cobs using many activating agents, but the use of boric acid as a chemical activating agent is found in only one study and that study belongs to our group. In that study, the adsorption mechanisms of Cd metal and methylene blue on the activated carbon were investigated [19]. In this study, the main objective was to investigate the adsorption performance of the produced activated carbon for the removal of Cr(VI) ions from aqueous media by equilibrium, kinetic and thermodynamic parameters.…”

Section: Introductionmentioning

confidence: 99%

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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: Preparation Production and Characterization Of Ccs-acmentioning

confidence: 91%

Section: Preparation Production and Characterization Of Ccs-acmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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