Removal of Pollutants from Industrial Effluents Using Plastic Clay and Pyrophyllite

Abstract

Attempts were made to remove Cr(VI) from tannery effluents, PO^3–₄ from gelatin industry effluent and C₂O^2–₄ from oxalic acid manufacturing unit effluent by plastic clay and pyrophyllite adsorbent. The adsorption of Cr(VI), PO^3–₄ and C₂O^2–₄  was found to be
appreciable in both adsorbents but removal was higher in plastic
clay for Cr(VI) and C₂O^2–₄ . Removal of PO^3–₄ was higher on
pyrophyllite. The percentage removal of Cr(VI). PO^3–₄ and C₂O^2–₄ in
industrial waste waters was 43.8, 49.6 and 53.4 on plastic clay
and 21.9. 53.1. 34.3 on pyrophyllite respectively. The equilibrium
data fit well within the Langmuir and Freundlich isotherms.