Adsorption of petroleum asphaltenes from toluene on mineral surface (LECA, perlite and bentonite)

This paper presents the feasibility of removal of asphaltenes from aqueous solutions by using low cost natural adsorbents such as light expanded clay aggregate (LECA), perlite and bentonite. The structure of adsorbents was characterized by XRD, FTIR, XRF and SEM before and after the adsorption of asphaltenes. The adsorption capacities of asphaltenes onto the three different selected mineral particles shown suggest that the magnitude of adsorption capacity was in the order of bentonite > perlite > LECA. The results of SEM images clearly show the caves, pores and surfaces of adsorbents in order of bentonite> perlite> LECA. The BET surface area of LECA, perlite and bentonite was found to be 0.8, 2.6 and 41m2/g, respectively.

کلیدواژه ها:

Asphaltenes ، Adsorption ، Leca ، Perlite ، Bentonit