Characterization of Modified Lampung Natural Zeolite with Cetyl Trimethyl Ammonium Bromide (CTAB) for Adsorption Industrial Tapioca Wastewater

Abstract

This research was observed on the CTAB modified Lampung Natural Zeolite (ZMS). The aim is to improve the adsorption capacity of tapioca wastewater. This zeolite modification process has several steps, starts with Lampung Natural Zeolite (ZAL or LNZ) pretreatment, LNZ activation by NH4Cl, and ends up with adding CTAB in four different of concentrations; 0.5 mM, 1 mM, 10 mM, and 100 mM. Resulting of ZMS was characterized by FTIR, XRD, SEM, and BET. FTIR results showed that the modification of ZAL with CTAB was successfully carried out on all variations of concentration. All of the ZMS formed has asymmetric and symmetric vibrations-CH2 which show the presence of CTAB crystals and methylene scissoring. According to the figures shown by XRD results, CTAB modified zeolite for all concentration variations showed several peaks with 2θ diffraction angles that were identical to the peak identities of clinoptilolite and albite. The SEM results showed that ZMS has an identical morphological structure consists of crystals and slightly amorphous. Based on the material performance in adsorbing tapioca wastewater, the highest percentage of COD reduction was found in ZMS 4 adsorption with a pore average size of 74.9755 Å, surface area of 10.893 m 2 /g is 48.8%.