SYNTHESIS OF Fe3O4 NANOPARTICLES FOR PRINTING INK ADSORPTION AS ELEMENTAL CHEMISTRY LEARNING

• Main Author: RAUDHATIL JANNAH (NIM:90516001), NANDA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29532
• Institution: Institut Teknologi Bandung

Fe3O4 nanoparticles can be used as an adsorbent for dyes removal of printing ink <br /> <br /> from wastewater. Printing inks contribute to pollution in water because of its use <br /> <br /> in the printing industry, offices and households. Fe3O4 nanoparticles able to use <br /> <br /> for methylene blue and methyl violet dyes adsorption, however no report on the <br /> <br /> use of this material for printing inks adsorption. Fe3O4 was synthesized by <br /> <br /> coprecipitation method using precursors FeCl3.6H2O and (NH4)2Fe(SO4)2.6H2O <br /> <br /> (mol ratio Fe3+: Fe2+ = 2:1) dissolved in distilled water. NaOH solution was added <br /> <br /> slowly into the iron solution with continuous stirring for 60 minutes in Argon gas <br /> <br /> atmosphere. The black precipitate obtained was filtered, washed and dried at 100 <br /> <br /> oC. Diffractogram of Fe3O4 nanoparticle was matched with ICSD database with <br /> <br /> particle size calculated by using Debye-Scherrer equation about 9-26 nm. <br /> <br /> Distribution of Fe3O4 particle was analyzed by using PSA and the most particle <br /> <br /> size distribution about 34 nm. Fe3O4 nanoparticles (0.1 g) used for red, blue and <br /> <br /> yellow ink adsorption and get the adsorption percentage about 94%, 97% and <br /> <br /> 62% respectively, with concentration of printing ink solution is 0.03% v/v, 40 <br /> <br /> minutes contact time and 100 rpm of stirring speed. For printing ink concentration <br /> <br /> 0.06% v/v, the adsorption of red, blue and yellow inks were 80%, 94% and 48% <br /> <br /> respectively. Using as much as 0.4 g of Fe3O4 nanoparticle can increase the <br /> <br /> adsorption percentage of yellow ink up to 80%. <br /> <br /> Fe3O4 nanoparticle can be <br /> <br /> separated from the printing ink solution by an external magnetic field. The result <br /> <br /> of this research have been applied as a practical examination on National <br /> <br /> Chemistry Competition 2018. In this case, Fe3O4 that had a larger particle size <br /> <br /> about 340 nm, used as an adsorbent for red ink solution. As many as 21% of 84 <br /> <br /> students had completed the experiments precisely.