Author(s): Sumita Nair, Piyush K. Pandey
This work has studied the adsorption isotherm of arsenic on ferric chloride with a coagulant of plant origin. The adsorption of arsenic by iron oxides is a very important natural process that is largely responsible for preventing widespread arsenic toxicity problems in nature. The ANOVA results are in good agreement with the addition of CPO to ferric chloride for arsenic removal. The amount of adsorption is described by the adsorption isotherm. The removal or transport of arsenic is closely related to the adsorption isotherm. The results of adsorption isotherm study shows that the adsorption of arsenic follows both the Freundlich and Langmuir adsorption isotherm and the addition of CPO plays a supportive action. The use of CPO extract with ferric chloride increased the non-linearity of both the isotherm which is indicated by the decrease in the R2 value in case of arsenite adsorption isotherm using ferric chloride with CPO this increased non linearity favours the multi-layered adsorption process.