ADSORPTION OF ANTHRACENE AND PHENANTHRENE USING MERCAPTOPROPYL TRIMETHOXYSILANE (MPTMS)-MODIFIED MORDENITE

• Main Author: Phianissha, Cessoria
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/65314
• Institution: Institut Teknologi Bandung

Pollution of organic pollutans in aquatic environments are caused by natural processes or human activities. Pollutants with low molecular mass, such as anthracene and phenanthrene, are able to enter living organisms and have high toxicity. The levels of anthracene and phenanthrene in bodies of water such as river and lake, are ranged from 1.0 – 256,000 ng/L and 2.9 – 1,138,000 ng/L. To reduce these levels of PAHs in the aquatic environment, a separation method, with good process, price and high also simple compound binding adsorption method, is needed. Zeolite is an alternative adsorbent that has high level of hydration and stable crystal structure. Mordenite is a type of natural zeolite that has stable composition of silica properties, hydrophobicity, but its crystallinity and PAH adsorption capabilities are needed to be improved. In this study, mercaptopropyl trimethoxysilane (MPTMS) is used as a modified compound for mordenite because it has high hydrophobicity to absorb PAH. This study aims to modify natural mordenite with MPTMS, characterize natural mordenite and MPTMS modified mordenite using FTIR, XRD, BET and contact angle. The effect of contact time, initial concentration on adsorption of anthracene and phenanthrene with MPTMS modified mordenite are also evaluated alongside with its kinetics, isotherm and thermodynamics adsorption properties. where the results of the two PAH molecules are analyzed using GC/MS. Mordenite is successfully modified using mercaptopropyl trimethoxysilane (MPTMS) with the peak absorption spectrum of the FTIR spectrum at a wave number of 2939 cm-1, which indicated the presence of C-H from the MPTMS propyl group. In addition, the decrease in surface area of the modified mordenite from BET is 13%. XRD results show that there are differences in intensity between natural mordenite and modified MPTMS. The contact time needed to reach equilibrium state is 10 minutes for adsorption of anthracene and 5 minutes phenanthrene with MPTMS modified mordenite. The adsorption capacity will increase along with the increase of analyte’s concentration. Based on the adsorption study, the adsorption of anthracene and phenanthrene fitted to the Pseudo-second-order and Freundlich isotherm adsorption. The adsorption is spontaneous and endothermic.