Abstract
This research modified natural zeolite with TiO2 synthesized by the sol-gel process which was applied as a humic acid adsorbent. The purpose of this study was to coat natural zeolites with TiO2 to increase the adsorption capacity of natural zeolites as humic acid adsorbents. The natural zeolite powders were obtained from Kabupaten Solok, West Sumatra, based on X-ray Fluorescence (XRF) analysis, the ratio of silica/alumina (Si/Al) was 4.35, indicating that natural zeolite was clinoptilolite zeolite. Scanning Electron Microscopy (SEM) analysis showed natural zeolite has a rough surface with closed pores while zeolite coated with TiO2 (zeolite/TiO2) has a homogeneous, smooth surface with open pore. The results of the Energy Dispersive X-Ray Spectroscopy (EDS) analysis showed that the level of TiO2 was 7.1%, this result showed that TiO2 has been coated on the surface of the zeolite. Natural zeolite and zeolite/TiO2 were applied as humic acid adsorbents. Maximum adsorption capacity of natural zeolites and zeolites/TiO2 were 0.2787 mg/g and 1.199 mg/g, respectively.
Highlights
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This research modified natural zeolite with TiO2 synthesized by the sol-gel process
which was applied as a humic acid adsorbent
Summary
Bahan kimia Bahan-bahan yang digunakan dalam penelitian ini antara lain zeolit alam Kabupaten Solok Sumatera Barat, titanium tetraisopropoksida (TTIP), asam humat, etanol p.a (Merck), akuades, dan NaOH (Merck). Peralatan Peralatan yang digunakan antara lain peralatan gelas, lumpang dan alu, oven, timbangan analitik, hotplate stirrer, shaker, X-ray Fluorescence (XRF) (PAnalytical EPSILON-3), X-ray Difraction (XRD) (Philip Xpert Powder Type PW4030/60), Scanning Electron MicroscopyEnergi Dispersive X-Ray Spectroscopy (SEM-EDS) (JOEL tipe JSM-6390LA), Fourier Transform Infrared (FTIR) (Unican Mattson Mod 7000 FTIR), dan Spektrofotometer Visible tipe Spektronik 20
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