Year 2018, Volume 5 , Issue 1, Pages 219 - 236 2017-09-01

Examination of the Effects of Activated Carbon Produced from Coal Using Single-Step H3PO4/N2+H2O Vapor Activation on the Adsorption of Bovine Serum Albumin at Different Temperatures and pH Values

Atakan Toprak [1] , Kadriye BOZGEYİK [2]


This study examined protein adsorption equilibrium and kinetics on activated carbon (AC) that we obtained from coal by single-step H3PO4 activation under N2+H2O vapor at 800 °C. Surface properties, pore size distribution, and volumes of AC were determined using volumetric method with N2 adsorption at 77 K. Also, the textural properties were characterized by SEM-EDAX and XRD. The zeta potential values were measured to elucidate the electrostatic interactions between the protein and AC. The obtained AC discrete system was also used as an adsorbent for adsorbing bovine serum albumin (BSA) from aqueous solution. The effects of pH (4.0, 5.0, and 7.4) and temperatures (20, 30 and 40 °C) on the adsorption of BSA on AC were examined. The surface area, micropore, mesopore and total pore volumes of AC were found to be 1175 m2/g, 0.477 cm3/g, 0.061 cm3/g and 0.538 cm3/g, respectively. The optimum temperature for AC in BSA adsorption was found to be 40 °C and the pH was found to be 4.0. The highest BSA adsorption was found to be 159 mg/g and pH to be 4.0. The experimental equilibrium data were compared with the Langmuir and Freundlich models and found to be compatible with both models. The adsorption process is best described by the pseudo-first-order kinetic model. As a result, it was found out that AC obtained by single step H3PO4/N2+H2O vapor activation is an effective adsorbent for the adsorption of BSA from aqueous solution.


Coal, Activated Carbon, BSA, Adsorption Isotherms, Kinetics
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Subjects Engineering, Chemical, Engineering
Published Date Winter
Journal Section Articles
Authors

Orcid: 0000-0003-0008-1456
Author: Atakan Toprak
Country: Turkey


Author: Kadriye BOZGEYİK
Country: Turkey


Dates

Application Date : October 2, 2017
Acceptance Date : December 22, 2017
Publication Date : September 1, 2017

Vancouver Toprak A , BOZGEYİK K . Examination of the Effects of Activated Carbon Produced from Coal Using Single-Step H3PO4/N2+H2O Vapor Activation on the Adsorption of Bovine Serum Albumin at Different Temperatures and pH Values. Journal of the Turkish Chemical Society Section A: Chemistry. 2017; 236-219.