Adsorption of halogenated hydrocarbons from aqueous solutions by wetted and nonwetted hydrophobic and hydrophilic sorbents: Equilibria
Single-solute adsorption equilibria of 1,1,1-trichloroethane, 1,1,2-trichloroethane, trichloroethene, trans-1,2-dichloroethene, chloroform, 2,4-dichlorophenol, and dichloromethane dissolved in water have been measured, using both wetted and nonwetted hydrophobic Amberlite XAD-4 resin at 20 C. The results could be described by means of Freundlich isotherms indicating the heterogeneity of the Amberlite XAD-4 surface. Wetted and nonwetted Amberlite XAD-4 showed identical adsorption capacities. The influence of the ionic strength on the adsorption capacity of Amberlite XAD-4 for 1,1,1-trichloroethane has been measured by adding KCI to the aqueous solution. The apparent adsorption capacity was found to increase with salt concentration due to the salting-out effect. Adsorption equilibria of dichloromethane, which is generally regarded as a key component with regard to water treatment demands, have also been measured using several other synthetic resins, as well as activated carbon. The order of increasing adsorption capacity was found to be Amberlite XAD-7 {le} Amberlite XAD-4 {approximately} Dowex XUS 43493.00 {le} Norit ROW 0.8 SUPRA {le} Ambersorb XE-572 {le} Ambersorb XE-563.
- Research Organization:
- Twente Univ. of Technology, AE Enschede (NL)
- OSTI ID:
- 20003899
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. 44, Issue 6; Other Information: PBD: Nov-Dec 1999; ISSN 0021-9568
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of granular activated carbon and macroreticular synthetic adsorbents for groundwater remediation
Response threshold levels of selected organic compounds for rainbow trout (Oncorhynchus mykiss)