The preparation of activated carbon
from plant waste is very interesting from an economic point of view [1].
Humic substances (HS) are present in every type of aquatic and terrestrial
environments because of the decomposition of plant and animal
biomass. They are typical components of natural organic matter in
surface water. Humic acid (HA) is one of the major components of
humic substances and it contains both hydrophilic and hydrophobic
moieties