Studies on removal of chloride from soak liquor

Abstract

Rice bran is converted into activated charcoal by treating wilh conc. H₂S0₄ and is used as an adsorbent for the removal of chloride present in the tannery soak liquor upto a concentration of 35,000 mgm/litre. It was found to be effetive at the pH. Efrect of the constituents of rice bran on adsorption has also been studied. Infra-red spectra of the samples and the T. L. C. showed that the adsorption is only a physical phenomenon. The rate of adsorption of chloride over the charcoal was determined as 9.150 × 10^-3/min. The adsorption passes through triple layer formation as shown by adsorption isotherm. The charcoal removes chloride to the extent of 0.9800 m ep/gm. of the charcoal. The soluble proteins present in the soak liquor are also removed with 100% efficiency. The B. O.D, C.O.D and colour of the soak liquor Were seen to be reduced reduced after passing throuh the charcoal.