STUDY OF AERIAL OXIDATION OF SULFIDE CONTENTS IN TANNERY WASTES

Waste effluents from leather tanning industry contain a large quantiti es of sulphide salts which cause pollution in land and water channels and when come in contact with some acidic media, release a highly toxi c gas hydrogen sulphide into air. Hence to protect the environment, it is desirable that sulphide content from tannery wastes should either be removed or converted to some harmless compound before leafing the w aste into some water channel. In this work aerial oxidation of sulphid e has been studied by designing model experiments in laboratory. Basic ally oxidation was carried out by bubbling air through sulphide soluti on and a number of concerned parameters like the role of catalyst, tem perature and time have been studied. Real sulphide samples from tanner ies were also successfully oxidized by employing optimum conditions.