Introduction
Basic dyes are widely used in acrylic nylon and wool
dyeing. The dye structures generally embody aromatic with
various functional groups. The complex molecular struc-
ture often renders them recalcitrant. Some dyes have been
reported to cause allergy, irritation, cancer, and even muta-
tion in humans (
Bhattacharyya and Sharma, 2004
), and
therefore the removal of dyes from waste streams before
discharge to public water sources is of primary concern.
Sorption is generally regarded as an effective technique
for the treatment of dye-containing wastewater. One of
the most widely used sorbents is activated carbon which
has relatively high sorption capacity for a wide variety of
dyes (
Choy et al., 1999; Robinson et al., 2001
). Due to eco