TREATMENT OF CARPET EFFLUENTS BY ADSORPTION ON WOLLASTONITE

Treatment of carpet effluents containing some chrome dyes, viz. omega chrome red ME (OCR), metomega chrome orange GL(MCO) and omega chrome f ast blue B (OCB) by adsorption on wollastonite has been carried out. T he maximum removal of dyes is noted at 10 mg dm(-3) initial concentrat ion, 30 degrees temperature, pH 2.0 and 53 mu m adsorbent particle siz e. The process of uptake follows first order fate expression and obeys Langmuir's model of adsorption. The coefficients of intraparticle dif fusion and mass transfer are determined. The effect of temperature is round to be negative indicating exothermic nature of the process. Deso rption study suggests the involvement of physicosorption.