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- Title
Kinetics of Cr(VI) adsorption from aqueous medium onto bentonite.
- Authors
Petrović, Rada; Gajić, Dragana; Obrenović, Zoran; Bodroža, Darko; Popadić, Nevena; Davidović, Danka; Ćulumović, Mirjana
- Abstract
Because of its abundance and toxicity, heavy metals have become a serious environmental problem. The presence of heavy metals, such as Cr(VI), in the watercourses leads to numerous health problems in humans and animals. Cr(VI) is highly toxic, even in low concentrations. Because of its carcinogenic, mutagenic and teratogenic effects on human beings, Cr(VI) is considered one of the most critical pollutants. Due to this, it is necessary to remove Cr(VI) from wastewater prior to its discharge into the recipient. This paper studied the possibility for application of bentonite as an adsorbent for Cr(VI) from aqueous medium. The characterization of bentonite was determined with chemical composition, specific surface, XRD method and FTIR. Optimal parameters such as pH of solution, adsorbent weight, time of adsorption and temperature were examined. Values of those parameters were: initial pH value of solution pH=2, adsorbent weight 2 g, time of adsorption 60 min, temperature 308 K. Experimental data were obtained by Freundlich and Langmuir isotherm adsorption models as well as pseudo-first and pseudo-second order kinetics. Results were best described with Freundlich isotherm adsorption model and pseudo-second order kinetics.
- Publication
Gazette of Chemists, Technologists & Environmentalists of Republic of Srpska / Glasnik Hemicara, Tehnologa i Ekologa Republike Srpske, 2018, Vol 15, p9
- ISSN
1840-054X
- Publication type
Academic Journal
- DOI
10.7251/GHTE1915009P