title: A key parameter on the adsorption of diluted aniline solutions with activated carbons: The surface oxygen content.
abstract: A total of 11 different commercial activated carbons (AC) with well characterized textural properties and oxygen surface content were tested as adsorbents for the removal of aniline as a target water pollutant. The maximum adsorption capacity of aniline for the studied AC was from 138.9 to 257.9 mg g(-1) at 296.15 K and it was observed to be strongly related to the textural properties of the AC, mainly with the BET surface area and the micropore volume. It was not observed any influence of the oxygen surface content of the AC on the maximum adsorption capacity. However, it was found that at low aniline aqueous concentration, the presence of oxygen surface groups plays a dominant role during the adsorption. A high concentration of oxygen surface groups, mainly carboxylic and phenolic groups, decreases the aniline adsorption regardless of the surface area of the AC.
authors: IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017, Barcelona, Spain; Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci, 32, Milan 20133, Italy.
authors: Beatrice
authors: B
authors: Pardo
authors: IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017, Barcelona, Spain.
authors: Nabí
authors: N
authors: Ferrer
authors: IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017, Barcelona, Spain.
authors: Julià
authors: J
authors: Sempere
authors: IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017, Barcelona, Spain. Electronic address: rafael.gonzalez@iqs.url.edu.
authors: Rafael
authors: R
authors: Gonzalez-Olmos
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry* / Q000302:isolation & purification; D002606:Charcoal / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D012996:Solutions; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification; D018508:Water Purification
chemical_list: D000814:Aniline Compounds; D010636:Phenols; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D002606:Charcoal; D010100:Oxygen; C023650:aniline
keywords: Activated carbon; Adsorption; Adsorption isotherm; Aniline; Surface characterization