Article 2023 · 1 citations

INVESTIGATION OF LEAD REMOVAL FROM AQUEOUS SOLUTIONS USING MODIFIED NATURAL CLAY: KINETICS AND THERMODYNAMICS APPROACHES

Torun, Fatma Ekmekyapar, Kisacikoglu, Raziye

Abstract

In this study, the natural clay was modified and removal of Pb2+ ions synthetically prepared aqueous solutions using this modified clay was investigated. The parameters affecting the adsorption efficiency were examined in the study. In the result of studies, the suitability of the adsorption data to classic adsorption models, and adsorption kinetics were determined. In the experiments, it has been determined that pH 5 provides optimum removal conditions of adsorption and adsorption reached equilibrium in approximately 15 min. The highest removal efficiency was found to be 82.13% with the addition of 3 g L-1 adsorbent at a stirring speed of 200 rpm. As the lead concentration of the wastewater increases, the amount of lead retained per dry unit weight of the modified natural clay also increases. Experimental data showed that Pb2+ removal was consistent with Temkin adsorption model. Calculated thermodynamic constants showed that adsorption is exothermic and physical.

Keywords

Adsorption Isotherm Lead removal Natural clay Thermodynamic constants HEAVY-METALS METHYLENE-BLUE CATIONIC DYES ADSORPTION EQUILIBRIUM MECHANISM GASES ACID

WoS Categories

Chemistry, Multidisciplinary

Sustainable Development Goals

Clean Water and Sanitation

Citation

Journal: BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
Year: 2023
Volume: 37
Issue: 1
Pages: 231-244
ISSN: 1011-3924
eISSN: 1726-801X
DOI: 10.4314/bcse.v37i1.18
WoS UID: WOS:000878690900018

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