REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION USING GRANULARACTIVATED CHARCOAL PREPARED FROM CORDIA MACLEODII TREEBARK AND SURFACE MODIFIED GRANULAR ACTIVATED CHARCOAL: ACOMPARATIVE STUDY VIA SPECTROSCOPIC CHARACTERIZATIONS
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 5, Issue 10
Abstract
Granular Activated Charcoal (GAC) was prepared by using Cordia macleodii tree bark and was tested for theremoval of Chromium (VI). All the experiments were carried out in batch process. To enhance its metal ionsadsorption capacity, activated carbons were impregnated with the chelating agents like sodium dodecyl sulfate(SDS), sodium dodecyl benzeneulfonate (SDBS) and Dioctyl sulfosuccinate sodium salt (DOSS) and were testedfor the removal of Chromium (VI). Adsorption isotherms of Chromium ions in aqueous solution have beenexperimentally measured on both modified and unmodified charcoal. Effects of adsorbent dose, pH, contact time,initial concentration and temperature were investigated on removal of Chromium (VI). Adsorption was confirmedby SEM-EDAX and FTIR morphological analysis. The adsorption data were fitted well by Langmuir adsorptionisotherm. Approximately 96.54% of hexavalent Chromium was removed at pH 2 within 3 hr. It was found thatchemically modified GAC with chelating agents demonstrated better Chromium (VI) removal capabilities ascompared to pure adsorbents in terms of their adsorption rate. On the basis of present studies, it can be concludedthat granular activated charcoal impregnated with chelating agents has a higher Chromium (VI) adsorptioncapacity.
Authors and Affiliations
Atul K. Wanjari
Keywords
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