Author(s):
1. Rada Petrovic, Republic of Srpska, Bosnia and Herzegovina
2. Sanja Dobrnjac, Republic of Srpska, Bosnia and Herzegovina
3. Jelena Penavin-Škundrić, Prirodno-matematički fakultet Banja Luka, Republic of Srpska, Bosnia and Herzegovina
4. Zorica Levi, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
5. Darko Bodroža, Republic of Srpska, Bosnia and Herzegovina
6. Mirko Petković, Republic of Srpska, Bosnia and Herzegovina
7. Trivo Stanković, Republic of Srpska, Bosnia and Herzegovina

Abstract:
The adsorption of methylene blue (MP) from the aqueous environment was examined on bentonite and on a series modified bentonites (Amcol and Tonsil modifications) in the temperature interval from 278 K to 303 K. The balance isotherms applied on the system of aqueous solution MP/adsorbent are: Freundlich, Langmuir, Temkin isotherms. The calculated thermodynamic data provided an insight in the type of adsorption and spontaneity of the process itself depending on the experiment temperature. The most important textural characteristics of bentonite were determined by the adsorption of nitrogen at the temperature of liquid nitrogen. The following was established: specific surface (SPBET), total volume of pores (Vp), most common value of pore diameter (Dmax) and mean value of pore diameter (Dmed).

Key words:
adsorption, methylene blue, Freundlich isotherm, Langmuir isotherm, Temkin isotherm, Dubinin Radushkevich isotherm

Thematic field:
General and Applied Chemistry

Date of abstract submission:
30.06.2016.

Conference:
XI Savjetovanje hemičara, tehnologa i ekologa Republike Srpske

Paper for reviews Abstract Final paper