The presence of heavy metals in water systems has become a serious problem. Therefore, the development of new methods to remove heavy metal ions from contaminated water is attracting attention. One of the most efficient techniques for removing harmful heavy metal ions is adsorption technology. Metals that are harmful to humans and the environment include copper, chromium, lead, mercury, cadmium, nickel, iron, and cobalt. One of the most important contaminant metal ions is hexavalent chromium, which is found in most industrial effluents. Many conventional physical and chemical treatment methods for removing hexavalent chromium are described in the literature. However, these processes are costly, energy intensive and produce toxic and carcinogenic by-products. A recent study demonstrated the effectiveness of activated carbon from Butea monosperma bark in removing Cr(VI) from contaminated water, including the effects of pH, sorbent dosage, contact time, and initial metal ion concentration. It was examined in relation to many parameters. An optimal pH, equilibrium pH = 6.5, was required for hexavalent chromium uptake. With increasing contact time, the removal of Cr(VI) from the aqueous solution increased and reached equilibrium after 150 min. Furthermore, removal of Cr(VI) increased with increasing sorbent dosage. Maximum adsorption of Cr(VI) (96%) was studied at an adsorbent dose of 5.0 g/l. As the initial Cr(VI) concentration increases, the Cr(VI) removal rate decreases. This investigation revealed that activated carbon freshly prepared from the bark of Butea monosperma can be used as an adsorbent for the removal of hexavalent chromium from aqueous solutions. It is cheap and energy intensive.
Author(s) Details:
S. S. Hunge,
Chintamani College of Science, Pombhurna, Gondwana University, Gadchiroli (MS), India.
Please see the link here: https://stm.bookpi.org/COSTR-V6/article/view/8420
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