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Removal Of Hexavalent Chromium From Tannery Industry By Adsorption Using Chitosan

Volume 5 - Issue 5, May 2022 Edition
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Author(s)
Nibret Mekonen Ayele
Keywords
Adsorbent, hexavalent chromium, and chitosan
Abstract
Chromium (Cr) is one of the most toxic heavy metals to living organisms, with different adverse health effects on humans, animals, plants, and microorganisms, and it must be reduced or removed from the body of water. The objective of this study was to remove hexavalent chromium from the tannery industry using chitosan. The batch adsorption experiments were conducted using a UV-Vis spectrophotometer. Equilibrium adsorption isotherms and the kinetic behavior of the process were also studied. The optimum conditions of the study were 120 min of contact time, 0.5 g adsorbent dose, and a solution pH of 3.0, which resulted in maximum Cr (VI) uptake. The maximum removal percentage of Cr (VI) was 86.00. The experimental data better fitted the Langmuir isotherm with a monolayer adsorption capacity of 20.82. The kinetic analysis revealed that the pseudo-second-order model fitted well to the acquired experimental data.
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