ADSORPTION OF CHROMIUM (VI) IONS FROM AQUEOUS SOLUTION USING ACTIVATED RAW INORGANIC SORBENTS

Research into toxic heavy metals released into the environment has recently received a lot of attention. One reason is that these ions pollute the air, soil, and water and affect human health. Among the heavy metals that appear as the most toxic water pollutants is chromium. For the removal of Cr(VI) ions from aqueous solution, we have activated several inorganic mineral sorbents originating from the Republic of North Macedonia. We monitored the change in chromium ion concentration before and after the adsorption process with a spectrophotometer (UV/VIS Spectrophoto-meter). It was worked with solutions of Cr(VI) ions with an initial concentration of 0.5 mg/l, pH 3. The volume of all solutions was 400 ml, while the amount of sorbents was 2.5 g/l. It was worked at room temperature in a glass reactor, which was placed on a magnetic stirrer at 400 rpm. Of the three inorganic mineral adsorbents, activated diatomite showed the best results.