Adsorption of phenolic compound by aged-refuse.
The adsorption of phenol, 2-chlorophenol, 4-chlorophenol and 2,4-dichlorophenol by aged-refuse has been studied. Adsorption isotherms have been determined for phenol, 2-chlorophenol, 4-chlorophenol and 2,4-dichlorophenol and the data fits well to the Freundlich equation. The chlorinated phenols are absorbed more strongly than the phenol and the adsorption capacity has an oblivious relationship with the numbers and the position of chlorine subsistent. The experiment data suggests that both the partition function and the chemical adsorption involve in the adsorption process. Pseudo-first-order and pseudo-second-order model were applied to investigate the kinetics of the adsorption and the results show that it fit the pseudo-second-order model. More than one step involves in the adsorption process and the overall rate of the adsorption process appears to be controlled by the chemical reaction. The thermodynamic analysis indicates that the adsorption is spontaneous and endothermic.
The State Key Laboratory of Pollution Control and Resource Reuse, School of Enviromental Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China. xlchai@mail.tongji.edu.cn
Chai
C
Xiaoli
Zhao
Z
Youcai
D000327:Adsorption; D002733:Chlorophenols; D004058:Diffusion; D005735:Garbage; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D008956:Models, Chemical; D010636:Phenols / Q000737:chemistry*; D012037:Refuse Disposal / Q000295:instrumentation* / Q000379:methods*; D013816:Thermodynamics; D013997:Time Factors; D014874:Water Pollutants, Chemical; D014877:Water Pollution, Chemical; D018508:Water Purification
D002733:Chlorophenols; D007220:Industrial Waste; D010636:Phenols; D014874:Water Pollutants, Chemical