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Adsorption of alkylimidazolium and alkylpyridinium ionic liquids onto natural soils

Lookup NU author(s): Dr Wojciech Mrozik

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Abstract

The mechanism of ionic liquid sorption onto selected natural soils differing in their organic content, cation exchange capacity, and particle size distribution was investigated in detail. Isotherms were employed to describe sorption. In most cases, the maximum achievable surface concentrations were well above CEC values. This observation may indicate that initially sorbed solutes modify the sorbent, a process favoring further sorption. The experimental data suggest that if a multilayer process occurs, such a mechanism will be applicable to all ionic liquids; but saturation of the second layer occurred only with the longest alkyl chain compound. The shorter alkyl chain cations did not reach saturation in the concentration range investigated here. The influence of the varying pH and ionic strength of an aquifer on sorption strength was also determined.


Publication metadata

Author(s): Stepnowski P, Mrozik W, Nichthauser J

Publication type: Article

Publication status: Published

Journal: Environmental Science and Technology

Year: 2007

Volume: 41

Issue: 2

Pages: 511-516

Print publication date: 01/01/2007

ISSN (print): 0013-936X

ISSN (electronic): 1520-5851

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/es062014w

DOI: 10.1021/es062014w


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