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The ability of desorption of Cr (III) from roots of water hyacinth, Eichhornia crassipes has been studied
at varying pH and concentrations and in the presence of tannery effluent water in order to stimulate real
time conditions. The chrome tanning has been employed in Tamil Nadu for almost 75 years and the
chrome waste has been directed into river waters for long. Recently, chrome recovery method has been
employed and chrome salt is recovered from it. But the chrome which has been released in the water
before remains absorbed by the water hyacinth and has been remaining in it for decades. The chromium
has been found to leap on from one generation of the plant to another. The desorption of chromium, after
the intake in water hyacinth roots were measured with varying pH and sorbent concentration and kinetic
studies were conducted. A remedial measure to remove the chromium traces in the water hyacinth roots
after absorption was also tested and chrome recovery method was employed.
Keywords: Chromium (III), Chrome recovery, Desorption, Kinetic studies, Tannery effluent water, Water
hyacinth roots.