Comparison on the Adsorption Thermodynamics of Three Typical Petroleum Hydrocarbons in the Single and Mixed Solution on Aquifer Media

Abstract

This paper researched on the adsorption kinetics and thermodynamics of the typical components of petroleum hydrocarbon-benzene, naphthalene, phenanthrene and their mixed solution on the typical media-the medium sand from the aquifer in an oil contaminated field, with a self-made rotary adsorption device. The result showed that the adsorption of the three adsorbates on the media follows the Henry adsorption model, no matter when they are separated or mixed. The adsorption capacity order of benzene, naphthalene and phenanthrene on the medium sand is phenanthrene> naphthalene>benzene, when they are separated or mixed. Comparing with the adsorption capacity when the adsorbates are single, benzene and naphthalene in the mixed solution shows stronger adsorption capacity, while phenanthrene carries on less adsorption capacity.

Organo-Vermiculites Modified by Aza-Containing Gemini Surfactants: Efficient Uptake of 2-Naphthol and Bromophenol Blue

“…Relatively stable adsorption capacities are observed for organo-Vts with increasing temperature. The related thermodynamic parameters are calculated and shown in Table 5 ; positive Δ G 0 values demonstrate that all adsorption processes are non-spontaneous [ 29 ]. Negative Δ S 0 values indicate the decreased randomness of the adsorption system.…”