Preparation of activated carbon from a renewable bio-plant of Euphorbia rigida by H2SO4 activation and its adsorption behavior in aqueous solutions

Gerçel, Özgül; Özcan, Adnan; Gerçel, Hasan Ferdi

doi:10.1016/j.apsusc.2006.10.053

Cited by 285 publications

(112 citation statements)

References 52 publications

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“…Accordingly, the plot could be described by three linear curves with different values of rate constants, which indicated that phenol adsorption on ACs were composed of three consecutive process including film diffusion, intraparticle diffusion and surface adsorption [20]. And from values of rate constants of AC and MAC were all decreased from 11.079 to 1.620 and 16.481 to 1.822, respectively, as time progresses.…”

Section: Resultsmentioning

confidence: 99%

The Adsorption Mechanism of Modified Activated Carbon on Phenol

et al. 2016

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Abstract. Modified activated carbon was prepared by thermal treatment at high temperature under nitrogen flow. The surface properties of the activated carbon were characterized by Boehm titration, BET and point of zero charge determination. The adsorption mechanism of phenol on modified activated carbon was explained and the adsorption capacity of modified activated carbon for phenol when compared to plain activated carbon was evaluated through the analysis of adsorption isotherms, thermodynamic and kinetic properties. Results shows that after modification the surface alkaline property and pHpzc value of the activated carbon increase and the surface oxygen-containing functional groups decrease. The adsorption processes of the plain and modified carbon fit with Langmuir isotherm equation well, and the maximum adsorption capacity increase from 123. 46, 111.11, 103.09mg/g to 192.31, 178.57, 163,93mg/g under 15, 25 and 35°C after modification, respectively. Thermodynamic parameters show that the adsorption of phenol on activated carbon is a spontaneously exothermic process of entropy reduction, implying that the adsorption is a physical adsorption. The adsorption of phenol on activated carbon follows the pseudo-second-order kinetics (R2>0.99). The optimum pH of adsorption is 6~8.

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Section: Resultsmentioning

confidence: 99%

The Adsorption Mechanism of Modified Activated Carbon on Phenol

et al. 2016

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“…Table 2 shows that the correlation coefficient (R 2 ) values for intraparticle diffusion model are lower than the pseudo-second-order kinetic model. Some other results have been described in a previous study that dealt with the creation or preparation of the activated carbon from various biomasses by H 2 SO 4 activation [17,18]. Equilibrium adsorption studies Figure 9 illustrates the liquid phase adsorption isotherms onto the prepared activated carbons.…”

Section: Kinetic Studiesmentioning

confidence: 93%

“…Their final surface properties depend on the activation method, time of activation as well as oxidation process. Chemical activation of carbon feedstocks with H 3 PO 4 [3,6] KOH [5] and H 2 SO 4 [17,18] has attracted much attention because it causes strong polymerization through activation process. In this respect, it is substantial in the production of ACs to select low-cost raw materials that are rich in carbon content.…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Oxidation on the Adsorption Properties of Cationic Dye on Activated Carbons Prepared from Locally Atropa belladonna

Rashwan

El-Nabarawy²,

Aboelenin

et al. 2018

Egypt. J. Chem.

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“…The band at 3407 cm -1 corresponds to stretching vibration of OH¯. Two weak bands at 2923-2852 cm -1 and at 2921-2850 cm -1 for CCAC and CAC, respectively indicate aliphatic group stretching vibration [17]. Large peaks observed at 2360 cm -1 and 2341 cm -1 for CCAC and CAC, respectively indicate antisymmetric stretching of CO 2 [18].…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

Comparison of adsorption behaviour of coconut coir activated carbon and commercial activated carbon for textile dye

Khan

Chaudhuri

2011

WIT Transactions on Ecology and the Environment

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The objective of the study was to prepare activated carbon from coconut coir and compare its adsorption behaviour for textile dye with that of a commercial activated carbon. The coconut coir activated carbon (CCAC) and commercial activated carbon (CAC) were characterised in terms of ash content, bulk density, pH, pH ZPC , surface area, micropore area, micropore volume, average pore diameter, surface morphology and surface functional groups. Adsorption of a textile dye, Acid Red 18 (AR 18), by CCAC and CAC was examined. Batch adsorption test showed that extent of dye adsorption was dependent on dye concentration, contact time and pH. Equilibrium adsorption was attained in 240 min and maximum adsorption occurred at pH 2. Adsorption by CCAC and CAC followed pseudo-second-order kinetics and equilibrium adsorption data were described by the Freundlich and Langmuir isotherm models. CCAC showed higher adsorption capacity for the dye [25.7 (Freundlich) and 48.5 (Langmuir)] compared to that [12.0 (Freundlich) and 37.3 (Langmuir)] of CAC. CCAC is a suitable substitute for CAC in the removal of acid dyes from aqueous solution

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Preparation of activated carbon from a renewable bio-plant of Euphorbia rigida by H2SO4 activation and its adsorption behavior in aqueous solutions

Cited by 285 publications

References 52 publications

The Adsorption Mechanism of Modified Activated Carbon on Phenol

The Adsorption Mechanism of Modified Activated Carbon on Phenol

Effect of Chemical Oxidation on the Adsorption Properties of Cationic Dye on Activated Carbons Prepared from Locally Atropa belladonna

Comparison of adsorption behaviour of coconut coir activated carbon and commercial activated carbon for textile dye

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