3.3.2. Surface modification of ACSC and coconut shell
carbon (CSC) with chitosan
The previously described method of Babel and Kurniawan
[10] for surface modification of coconut shell carbon with chitosan
was employed.
ACSC (500 g) was slowly added to dilute chitosan gel
(chitosan gel–water, v/v heated to 50 ◦C) and mixing was
carried out at 150 rpm for 24 h. The chitosan coated ACSC
(CACSC) was then washed with deionized water and dried at
102 ◦C for 2 h before use. The same process was applied to
CSC to obtain chitosan coated coconut shell carbon (CCSC).
A yield of 29% was determined for the chitosan coated
carbons.
The CACSC and CCSC were then soaked in 0.5% NaOH
solution till any residual acid was removed. These were then
rinsed extensively with deionized water and dried in an oven
(Mettler, England) at 102 ◦C for 2 h, cooled at room temperature
and stored in desiccators.