REMOVAL OF DYES FROM AQUEOUS SOLUTIONS BY
CELLULOSIC WASTE ORANGE PEEL
The adsorption of dyes such as congo red, procion
orange and rhodamine-B by waste orange peel was
examined at different concentrations of dyes, adsorbent
dosage, agitation time and pH. The adsorption obeyed
both the Langmuir and Freundlich isotherms and the
process of uptake followed first-order rate kinetics.
Acidic pH was favourable for adsorption for all three
dyes. Desorption studies showed that alkaline pH was
efficient for desorption of all the dyes. Copyright ©
1996 Elsevier Science Ltd.