EFFICIENCY EVALUATION OF TEA WASTE FOR ADSORPTION OF DIVALENT IRON FROM INDUSTRIAL EFFLUENTKHUSHBOO BHAVSARAbstract Iron is normally found in electroplating, leather tanning, metal finishing, steel mills, foundries, chemical milling, and wire drawing operations. It is also found in ground water. Iron in water is normally found in the ferrous state. The presence of iron is probably the most common water problem faced by wastewater and water treatment professionals. The secondary maximum contaminant levels (MCL) of Iron is 0.3 mg/L. Consequently, the removal of Fe(II) is very important issue in aquatic environments and water pollution control. The ability of activated carbon produced from Tea waste to adsorb Fe (II) from chemical industrial wastewater has been investigated through batch experiments. The extent of adsorption was evaluated by varying several physico-chemical parameters like initial concentration, contact time and pH. The variation in concentration of metal ions after adsorption was analyzed spectrophotometrically. The results showed that the sorption of Fe (II) ions on AWT was gradual and the equilibrium was achieved after only 120 min. The sorption data showed that solution pH was the most important parameter in controlling Fe (II) adsorption onto AWT. The optimum adsorbent dosage, i.e. 1.3 gm of AWT resulted into 98% removal of Fe (II). Furthermore, the adsorption of Fe (II) ions increased till neutral pH with a steady decline on increase in solution pH. Adsorption isotherms i.e Langmuir and Freundlich from Fe (II) on AWT were determined. Results revealed that the adsorption of Fe (II) by AWT followed the langmuir isotherm equation with a correlation coefficient equal to 0.914. The goal of the study was achieved to develop inexpensive, highly available, effective adsorbents from AWT as alternative to existing commercial adsorbents.
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