Hellna Tehubijuluw

Pattimura University · Chemistry Department

Photocatalytic degradation of Methylene Blue (MB) by zinc oxide/zeolite socony mobile-5 (ZnO/ZSM-5) composites was investigated. The ZSM-5 material was synthesized from red mud by a two-step hydrothermal method to which ZnO loadings at different mass ratios were subsequently performed. Characterizations using X-ray diffraction (XRD), Fourier transf...

Red mud wastes have been converted into mesoporous zeolite socony mobile-5 (ZSM-5) followed by deposited titanium dioxide (TiO2) nanoparticles to generate synergy adsorption-photodegradation for removal of dye removal in waste water. The amount of TiO2 loading was varied to achieve optimum photocatalytic activity while maintaining the mesoporosity...

Red mud as industrial waste from bauxite was utilized as a precursor for the synthesis of mesoporous ZSM-5. A high concentration of iron oxide in red mud was successfully removed using alkali fusion treatment. Mesoporous ZSM-5 was synthesized using cetyltrimethylammonium bromide (CTABr) as a template via dual-hydrothermal method, and the effect of...

Ionic liquids are considered as emergent pollutants as these compounds possess high persistent in aqueous solution and toxicity toward aquatic organism. In this work, the adsorption equilibrium of 27 ionic liquids, with different cation head group, alkyl chain length, and anion, onto ZSM-5 were measured experimentally at several composition and at...

Telah dilakukan penelitian untuk mengaplikasikan kitosan berderajat deasetilasi tinggi sebagai adsorbent zat warna tartrazina. Kitosan yang digunakan merupakan hasil deasetilasi kitin komersil dengan menggunakan NaBH4 yang memiliki derajat deasetilasi 97,03% dan bobot molekul 4,92 x 10 6 g mol -1 . Isoterm adsorpsi yang diikuti oleh sistem adsorpsi...

The synthesis of biodiesel from the waste cooking oil was carried out using the catalyst from egg shell of purebred chiken with ethanol as a solvent. Synthesis of biodiesel was prepared in two steps, esterification and transesterification. Esterification was conducted in mol ratio of ethanol and waste cooking oil of 9:1 with H 2SO 4 as a catalyst....

Determination of lattice energy, U, is an important work for ionic compounds, due to it is the driving force in the compounds formation. The objective this work are twofold, firstly to determine lattice energy of perovskite oxide using an approximate equation and compare lattice energy from the resulted simple equation and molecular simulation resu...