Agricultural by products
have proved to be promising raw materials for the production
of activated carbons because of their availability at a low price. They can
be used for the production of activated carbon with a high adsorption
ation.
In the physical activation, there are two steps: carbonization
step and activation step. The raw material is first carbonized under
inert atmosphere and then resulting char is activated at high temperature
by steam or carbon dioxide. In the chemical activation, raw material
is impregnated with an activation reagent and heated in an inert atmosphere.
Although many papers have been published in recent years on the
preparation of activated carbon from various cheaper and alternative
agricultural wastes and by products with chemical activation, only one
study concerning the production of activated carbon from grape stalk
activated chemically with H3PO4 has been made by Deiana et al., 2009