title: Studies on competitive adsorption of dyes onto carbon (XC-72) and regeneration of adsorbent.
abstract: Carbon as an adsorbent has been widely studied for wastewater treatment, but the regeneration of adsorbent has been scarcely reported. In this paper, an economical and environmental method was applied to regenerate carbon (XC-72). Results showed that both anhydrous ethanol and deionized water did not obtain optimal effect for the desorption of Acid Orange 7, Ponceau 2R and Rhodamine B, but the desorption effect was dramatically improved when anhydrous ethanol and deionized water were mixed in a certain volume ratio. In addition, the adsorption kinetics of the three dyes were investigated, which showed that the process of adsorption could be well represented by the pseudo-second-order model. For the study of competitive adsorption, this indicated that the interaction between adsorbent and adsorbate had something to do with electrostatic attraction.
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China E-mail: qhx@mail.njust.edu.cn.
authors.forename: Xiang
authors.initials: X
authors.lastname: Xing
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China E-mail: qhx@mail.njust.edu.cn.
authors.forename: Hongxia
authors.initials: H
authors.lastname: Qu
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China E-mail: qhx@mail.njust.edu.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China E-mail: qhx@mail.njust.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Chi
authors.affiliation: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
authors.forename: Huifang
authors.initials: H
authors.lastname: Xie
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D007700:Kinetics; D059027:Recycling; D012235:Rhodamines / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D002244:Carbon; D004396:Coloring Agents; D012235:Rhodamines; D062065:Wastewater; D014874:Water Pollutants, Chemical; C029773:rhodamine B; C014722:2-naphthol orange; C015476:ponceau MX