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Analysis Study Research Paper | Engineering Science | Libya | Volume 12 Issue 9, September 2023

Comparison of Removal of Chromium by using Natural and Chemical Adsorbents

Dr. Ali Taherabdollah | Dr. Mustafa Abdullah

Abstract: Chromium represents one of the most toxic contaminants. The Chromium is present only in two valences, Chromium (+III) and Chromium (+VI). Both of them are pollutant and have been proved to be harmful to fauna; flora, human beings and waters containing Chromium are extremely hazardous. Natural and chemical adsorbents were used in two separated studies for removal of Chromium from ten collected drinking water samples. The natural absorbents are clay minerals such as Kaolinite, Montmorillonite, Illite, Chlorite, and Vermiculite whereas four different chemical compounds were used such as aluminum Oxide, silicon oxide, mercaptans and carboxylic group. Two special methods were performed: A. S. T. M, which is a UV visible Spectrohotometric procedure and Atomic absorption method. Different approaches for the separation of water in low concentration Chromium have been investigated. Parameters such as, effect of pH, effective contact time and effect of mass were investigated and determined. The results of both studies allow us to compare between the different used approaches. Both natural and chemical compound absorbents display a very good result of removing chromium from the investigated drink water samples, but the natural adsorbents have a higher sorption potential, which ranges from 37 to 68%. The maximum amount of Chromium adsorbed was at 1g weight and pH 2. Chemical compound adsorbents show a less sorption potential for the hexavalent Chromium at pH 2 and the mass was in 1gram of adsorbent. The quantity of adsorbed Chromuim ranges from 0.5 to 55%. Based on our results in both studies, we prefer the natural adsorbents because they are efficient, safe, nonflammable, odorless, non - soluble, non - corrosive materials and as low cost adsorbent materials.

Keywords: Adsorption, Clay mineral, Chromium, Natural adsorbents, Chemical compounds

Edition: Volume 12 Issue 9, September 2023,

Pages: 642 - 645