| dc.description.abstract | The research on the adsorption capacity of methylene blue using adsorbents
based on carboxymethyl cellulose (CMC) and guar gum has been conducted. This
study aimed to determine the equilibrium time of methylene blue adsorption, evaluate
the adsorption capacity of the adsorbent, and identify the appropriate isotherm model
for the produced adsorbent. The adsorbent was prepared by blending CMC and guar
gum, with aluminum sulfate octadecahydrate and boric acid added as cross-linking
agents. The resulting adsorbents were characterized by WAC, degree of cross-linking,
FTIR, and SEM. Dye adsorption was performed with time variations at intervals of 15
minutes, 30 minutes, 45 minutes, 60 minutes, and 75 minutes. The equilibrium time
was found to be 45 minutes. Subsequent adsorption of methylene blue was carried out
with concentration variations of 20 ppm, 40 ppm, 60 ppm, 80 ppm, and 100 ppm. The
concentration of each methylene blue variation was determined using a UV-Visible
spectrophotometer. The experimental results indicated that the CMC-GG-AL-AB
adsorbent was effective in adsorbing methylene blue dye. The adsorption capacities at
concentration variations of 20 ppm, 40 ppm, 60 ppm, 80 ppm, and 100 ppm were
3.7017 mg/g; 7.4113 mg/g; 10.9718 mg/g; 14.9653 mg/g; and 18.6531 mg/g,
respectively. The higher the concentration of methylene blue dye, the higher the
adsorption capacity of the produced adsorbents. In this study, the appropriate
adsorption isotherm model was the Langmuir isotherm with an R2 value of 0.9912 and
an obtained adsorption capacity of 158.73 mg/g. | en_US |
