Heavy metal pollution has risen from various sectors of industries like electroplating, fertilizer, leather. paint, pesticide, pharmaceuticals, pulp and paper, mining, oil refinery etc. The removal of heavy metals is of special concern due to their recalcitrance and persistence of existence in the environment. Utilizing agricultural by products as low-cost biosorbents is more attractive because of their biodegradablility in nature, highly economical, reduction of cost in agricultural waste management and having major contribution in the protection of the environment. In general the chemical modifications of agricultural by products bring out enhanced adsorption capacities than in the unmodified forms.