[Adsorption of acid orange II from aqueous solution onto modified peat-resin particles].
The adsorption of acid orange II onto modified peat-resin particles was examined in aqueous solution in a batch system. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. The pseudo-first-order, pseudo-second-order kinetic and the intraparticle diffusion models were used to describe the kinetic data. The results showed that both Langmuir and Freundlich adsorption models could be used to describe the adsorption of acid orange II onto modified peat-resin particles. The maximum adsorption capacity was 71.43 mg x g(-1). The data analysis indicated that the intraparticle diffusion model could fit the results of kinetic experiment well. The adsorption rate of acid orange II onto modified peat-resin particles is affected by the initial dye concentrations, sizes and doses of modified peat-resin particles and agitation rates. The surface of modified peat-resin particle is the major adsorption area.
Sun
Qing-Ye
QY
Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. sunqingye1964@yahoo.com.cn
Yang
Lin-Zhang
LZ
D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D009281:Naphthalenes / Q000737:chemistry*; D010316:Particle Size; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
C456587:Acid Orange II; D000180:Acrylic Resins; D001391:Azo Compounds; D004396:Coloring Agents; D009281:Naphthalenes; D014874:Water Pollutants, Chemical