Health & Environmental Research Online (HERO)


Print Feedback Export to File
2836904 
Journal Article 
Removal of the antibiotic metronidazole by adsorption on various carbon materials from aqueous phase 
Canales-Alvarado, DH; Ocampo-Perez, R; Leyva-Ramos, R; Rivera-Utrilla, J 
2014 
Yes 
Journal of Colloid and Interface Science
ISSN: 0021-9797
EISSN: 1095-7103 
436 
276-285 
English 
25280372 
WOS:000344441700036 
The adsorption of the antibiotic metronidazole (MNZ) on activated carbon (F400), activated carbon cloth (ACF), mesoporous activated carbon (CMK-3), and carbon nanotubes (MWCNT) was investigated in this work. The effect of the adsorbent-adsorbate interactions as well as the operating conditions (ionic strength, solution pH, temperature, chemical modification of the adsorbents by HNO3 treatment, and water matrix) on the adsorption capacity were analyzed to substantiate the adsorption mechanism. The adsorption capacity markedly varied as function of the carbon material, decreasing in the following order: F400 > ACF > F400-HNO3 > CMK-3 > MWCNT > MWCNT-HNO3, and depended not only on their surface area and pore size distribution, but also on their chemical nature. The adsorption of MNZ was influenced by the solution pH, but was not significantly affected by the ionic strength and temperature. The adsorption of MNZ was enhanced when the MNZ solutions were prepared using wastewater. Therefore, the electrolytes present in the wastewater cooperated rather than competed with the MNZ molecules for the adsorption sites. Desorption equilibrium data of MNZ on all carbon materials demonstrated that the adsorption was reversible corroborating the weakness of the adsorbent-adsorbate interactions. (C) 2014 Elsevier Inc. All rights reserved. 
Adsorption; Antibiotic metronidazole; Carbon materials; Removal