Removal Of Methylene Blue Dye By Polyvinyl Alcohol/Multi-Walled Carbon Nanotubes Adsorbents

• Main Author: Zamri, Nurul Najihah
• Format: Monograph
• Language: English
• Published: Universiti Sains Malaysia 2021
• Subjects: T Technology; TP Chemical Technology
• Online Access: http://eprints.usm.my/55039/1/Removal%20Of%20Methylene%20Blue%20Dye%20By%20Polyvinyl%20AlcoholMulti-Walled%20Carbon%20Nanotubes%20Adsorbents_Nurul%20Najihah%20Zamri_K4_2021_ESAR.pdf; http://eprints.usm.my/55039/

Nowadays, water pollution becomes a serious issue in most of the country due to the development industry around the world. Textile industries is a popular sector that uses dyes that cause lots of water removed are contaminated. In this study, PVA and PVA/MWCNTs adsorbent were synthesized by using the phase inversion method to be used as an adsorbent to remove the methylene blue (MB) dye. Several parameters such as initial concentration, contact time and, the adsorbent dosage were studied to evaluate the performance of adsorbents. Based on the results, PVA/MWCNTs adsorbents was able to remove 46.58% of MB while the PVA adsorbents was able to eliminate 44.71% of MB at equilibrium state with an initial concentration is 2 mg/L. Hence, PVA/MWCNTs adsorbent was found to be the more efficient to remove the MB compare to the PVA adsorbent. From the equilibrium data, the two models were used to illustrate the adsorption isotherm, which is Langmuir, and Freundlich isotherm. In this experiment, it was found that the Langmuir models were suitable to explain the adsorption of MB dye in this process that shown a single layer adsorption was formed on the adsorbents. While the kinetic studies showed that the pseudo-second-order kinetic models were involved that describes that the chemisorption process has taken place in this adsorption process. In addition, it can be proven with the adsorption capacity obtained by using this model more closely to the experimental result.