<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The adsorption of Diphenolic acid (DPA), 2,4-Dichlorophenoxyacetic acid (2,4-D), and 2-methyl-4-chlorophenoxyacetic acid (MCPA) were examined in aqueous solution using activated carbon rice straw. The rice straw was activated by using two reagents, zinc chloride and phosphoric acid and named as RSZ, RSP, respectively. The results showed that both carbons have a relatively high adsorption capacity. Concerning the adsorption kinetic, the second-order model has better fit than the first model to experimental data. The adsorption yield of both carbons increased in the order: DPA &lt; 2,4-D &lt; MCPA. The pore volume diffusion model satisfactorily fitted the experiment on both carbons. Furthermore, solution pH has a high influence on the adsorption capacity for both carbons. The adsorption mechanism of selected pollutants onto carbon samples has been controlled by dispersion interaction π-π electrons and electrostatic interaction, moreover, the contribution of pore volume diffusion is the controlling mechanism of the overall rate of adsorption.</p></abstract>

The adsorption of Diphenolic acid (DPA), 2,4-Dichlorophenoxyacetic acid (2,4-D), and 2-methyl-4-chlorophenoxyacetic acid (MCPA) were examined in aqueous solution using activated carbon rice straw. The rice straw was activated by using two reagents, zinc chloride and phosphoric acid and named as RSZ, RSP, respectively. The results showed that both carbons have a relatively high adsorption capacity. Concerning the adsorption kinetic, the second-order model has better fit than the first model to experimental data. The adsorption yield of both carbons increased in the order: DPA < 2,4-D < MCPA. The pore volume diffusion model satisfactorily fitted the experiment on both carbons. Furthermore, solution pH has a high influence on the adsorption capacity for both carbons. The adsorption mechanism of selected pollutants onto carbon samples has been controlled by dispersion interaction π-π electrons and electrostatic interaction, moreover, the contribution of pore volume diffusion is the controlling mechanism of the overall rate of adsorption.

Adsorption mechanism and modelling of hydrocarbon contaminants onto rice straw activated carbons

Environmental Engineering Department, Faculty of Engineering

Civil Engineering Department, College of Engineering

Inorganic Chemistry Department, Faculty of Science

Physics and Engineering Mathematics, Faculty of Engineering

Microbiology Department, Faculty of Science

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The adsorption of Diphenolic acid (DPA), 2,4-Dichlorophenoxyacetic acid (2,4-D), and 2-methyl-4-chlorophenoxyacetic acid (MCPA) were examined in aqueous...

Adsorption mechanism and modelling of hydrocarbon contaminants onto rice straw activated carbons

Publié en ligne: 31 déc. 2019

Pages: 1 - 12

DOI: https://doi.org/10.2478/pjct-2019-0032

Mots clés
Activated carbon, rice straw, adsorption mechanism, adsorption modeling, pore volume surface diffusion

© 2019 Mahmoud M. Abdel daiem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Adsorption mechanism and modelling of hydrocarbon contaminants onto rice straw activated carbons

Publié en ligne: 31 déc. 2019

Pages: 1 - 12

DOI: https://doi.org/10.2478/pjct-2019-0032

Mots clésActivated carbon, rice straw, adsorption mechanism, adsorption modeling, pore volume surface diffusion

© 2019 Mahmoud M. Abdel daiem et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Activated carbon, rice straw, adsorption mechanism, adsorption modeling, pore volume surface diffusion