Laboratory test data on a newly developed adsorbent material show the material to be quite attractive for the removal of color from wastewater from a textile dying plant. The following equilibrium relation was derived from the test data. Y = 17.08 X0.48 where Y = kg coloring matter adsorbed per kg of the adsorbent, and X = kg color per kg water. (a) What per cent of the coloring matter will be removed if 100 kg of the wastewater containing 1 part coloring matter per 100 part of water is treated with 1 kg of the adsorbent in the following ways?

(i) The entire adsorbent is used in a single ideal batch. 

(ii) Half of the adsorbent is used to treat the solution in a ideal batch, the adsorbent is removed and the water is further treated with the rest of the adsorbent again. 

Calculate the quantity of adsorbent required to remove 99% of the color from 100 kg solution containing 0.8% of color by weight in (i) a single ideal batch. 

(ii) a very large number of 'ideal crosscurrent contact' in which a differential amount (infinitesimal amount) of the absorbent is added to each stage.

Answer rating: 100% (QA)

SOLUTION a i The entire adsorbent is used in a single ideal batch First we need to calculate the amount of coloring matter that will be removed in a single ideal batch From the equilibrium relation Y ... View the full answer