Adsorption of Methylen Blue with Activated Carbon (AC) And In-activated Carbon (CTA) form Salacca Seed

• Main Author: Desi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41325
• Institution: Institut Teknologi Bandung

Methylene Blue (MB) is one of thiazine dye. Commonly, the dye is used in the textile industry especially in the dyeing process. The improper treatment of the waste by the industry would lead to negative impact to the environment, especially wáter environment. A lot of methods have been developed to reduce the methylene blue in the environment such as by adsorption. In this research, the adsorption of methylene blue is using two adsorbent, activated carbon (CTA) and activated carbon (AC) from salacca seed. The adsorbents are characterized by analysis Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX). In addition, the adsorption of these carbons were optimized by varying the parameters, such as contact-time, initial, concentration of methylene blue, pH, mass of adsorbent, and salt effect. The results showed that the adsorbent of AC had a greater adsorption percentage than adsorbent of CTA. The maximum capacity of adsorption for adsorbent of AC was 128.53 mg/g, while the adsorbent of CTA was 30.14 mg/g. The optimum of contact time that was required by AC adsorbents to adsorb solution of MB was 60 minutes with the adsorption capacity (q) of 39.37 mg/g while CTA adsorbents was 15 minutes with the adsorption capacity of 25.41 mg/g. The capacity value adsorption of CTA decreased with increasing of concentration of the salt (MgCl2 and NaCl), but adsorption capacity increased with increasing the pH from 2 to 10 and became constant at pH >6. While the adsorption capacity of the AC adsorbent was relatively constant at pH > 3 and was not affected by increasing salt concentration. From the results of kinetic studies, it was found that the two adsorbents were following the model of the kinetics of pseudo-second-order and the adsorption isotherm was following Langmuir isotherm for AC and CTA.