EXTRACTION OF ALUMINUM (III) IONS FROM WASTE WATER USING AN ADSORBENT PREPARED FROM STEMS OF CASSIA OCCIDENTALIS PLANT

摘要

Bio-materials pertaining to Cassia Occidentalis plant are investigated as an adsorbent for the removal of Al3+ ions from polluted water. By controlling extraction conditions namely, pH, adsorbent dosage, time of equilibration, rpm and temperature, 100% removal of Al (III) ions is achieved. Substantial amounts of Al3+ ions can be removed even at low pH values. Even tenfold excess of common co-cations and many of anions (except Cl- and F-) do not interfere in the extraction. Thermodynamic parameters are evaluated to know the nature of adsorption. The methodology developed is applied successfully for the removal of Al3+ ions from the industrial effluents and polluted water samples.