| dc.description.abstract | This study aimed to determine the optimum conditions in biosorbent
production from papaya seeds used H2SO4 as activator. In this study, dried
papaya seeds were mashed to size of 60 meshes. Afterwords they were
activated used sulfuric acid at biosorbent to sulfuric acid ratio (b: v) 1: 1 (b/v)
sulfuric acid concentration of 5%, 7%, and 10% for 12 hours at temperature of
110 ºC. Papaya seeds were then separated and washed to remove acidity, and
then dried in on oven for 30 minutes, 60 minutes, 90 minutes, and 120 minutes
at 110 oC. The characteristics of biosorbent are affected by the analysis of
iodine number and surface area. Analysis of iodine number is to determine the
absorption of biosorbent to iodine solution with titration method of iodimetry.
While the determination of surface area, using the methylene blue solution.
Results show the highest iodine number at 482, 22 mg/g was reached at drying
time of 120 minutes with sulfuric acid concentrations of 10%. Results show the
highest Surface area at 33, 43556 m2
g/g was reached at drying time of 120
minutes with sulfuric acid concentrations of 10%. | en_US |
