Coir pith was obtained as a waste product from padding
used in mattress factories in Prachuapkhirikhan province (Thailand). A commercial activated carbon based on coconut shell
was obtained from Mazuma (Thailand) Co. Ltd. Both were
dried in a hot air oven at 105
◦
C for 1 h and then crushed and
sieved to obtain an approximate particle size less than 75m
(−200 mesh, U.S standard sieve). In addition,-cellulose, xylan
from brickwood and xylan from oat spelt were obtained from
S.M. Chemical Supplies Co. Ltd