Isothermal, kinetic and thermodynamic studies
of the adsorption of erythrosine dye onto activated carbon
from Periwinkle shell was carried out. The Periwinkle shell
were washed, dried, carbonized at 400oC, crushed, sieved,
chemically activated at 800oC, cooled, washed and dried at
110oC. Variable influencing factors, such as contact time,
temperature and concentration were studied through singlefactor experiment, while other factors are kept constant (at
30min, 30oC and 50mg/L) in each adsorption experiment.
From the adsorption isotherms, the correlation coefficient
for Redlich-Peterson is closer to unity than others used in
the adsorption. The adsorption kinetic followed pseudosecond order reaction, while the thermodynamic
parameters, (?H) = 13.49KJ/mol, (?S) = 43.48J/mol.K and
(?G) =  0.4, 0.06, -0.15, -0.27, -0.54, -7.30KJ/mol. These
results obtained show that activated carbon from
Periwinkle shell will be a good low-cost adsorbent for the
removal of erythrosine from aqueous solution.