title: Application of activated carbon derived from scrap tires for adsorption of Rhodamine B.
abstract: Activated carbon derived from solid hazardous waste scrap tires was evaluated as a potential adsorbent for cationic dye removal. The adsorption process with respect to operating parameters was investigated to evaluate the adsorption characteristics of the activated pyrolytic tire char (APTC) for Rhodamine B (RhB). Systematic research including equilibrium, kinetics and thermodynamic studies was performed. The results showed that APTC was a potential adsorbent for RhB with a higher adsorption capacity than most adsorbents. Solution pH and temperature exert significant influence while ionic strength showed little effect on the adsorption process. The adsorption equilibrium data obey Langmuir isotherm and the kinetic data were well described by the pseudo second-order kinetic model. The adsorption process followed intra-particle diffusion model with more than one process affecting the adsorption process. Thermodynamic study confirmed that the adsorption was a physisorption process with spontaneous, endothermic and random characteristics.
authors.affiliation: Institute of New Catalytic Materials Science, College of Chemistry, Nankai University, Tianjin 300071, China. lillyfeng@mail.nankai.edu.cn
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Shuangxi
authors.initials: S
authors.lastname: Liu
authors.forename: Tan
authors.initials: T
authors.lastname: Zhu
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D007700:Kinetics; D015394:Molecular Structure; D059027:Recycling; D012037:Refuse Disposal; D012235:Rhodamines / Q000737:chemistry*; D012408:Rubber / Q000737:chemistry*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D012235:Rhodamines; D014874:Water Pollutants, Chemical; D002244:Carbon; D012408:Rubber; C029773:rhodamine B