Chiang Mai Journal of Science

Utilization of Chitosan/Bamboo Charcoal Composite as Reactive Dye Adsorbent

Paper Type	Contributed Paper
Title	Utilization of Chitosan/Bamboo Charcoal Composite as Reactive Dye Adsorbent
Author	Walaikorn Nitayaphat*
Email	walaikorn@swu.ac.th
Abstract:  Chitosan/bamboo charcoal composites were prepared by blending chitosan with bamboo charcoal and forming composite beads. The composites were used as reactive dye adsorbents. Adsorption equilibrium experiments were carried out as a function of contact time, bamboo charcoal concentration, pH value, and adsorbent dosage level. The equilibrium time of dye adsorption was found to be 8 h. Composite adsorbent had the highest adsorption efficiency when the weight ratio was 50/50. The maximum dye removal took place at the initial pH value of 4.0. The optimum adsorbent dosage for dye removal was 6.0 g. Under above optimal conditions the maximum dye removal was 98.4%. The adsorption isotherm of chitosan and chitosan/bamboo charcoal composite beads agreed well with the Langmuir model. The maximum adsorption capacity was 3.47 mg/g for chitosan bead and 4.32 mg/g for chitosan/bamboo charcoal composite bead, respectively. SEM micrographs confirm that after adsorption the pores were packed with Reactive Red 152.
Start & End Page	174 - 183
Received Date	2012-11-07
Revised Date
Accepted Date	2013-02-27
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Volume	Vol.41 No.1 (JANUARY 2014)
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