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Iron sand as the source of many important minerals is one of natural resources in Southeast Sulawesi. The iron sand minerals that contain TiO 2 has economic value and a number of application i.e. environmental protection, paint industries, sensor and photovoltaic. The extraction of TiO 2 has been done from pseudorutile (Fe 2 Ti 3 O 9 ) using dissolution of HCl 20% and the addition of Fe 0 reductor to optimize the microwave and conventional process. The result showed the optimized yield value of TiO 2 and Fe 2 O 3 are 74.49% and 80.35%, respectively. The power used effect of microwave-assisted to the extraction process was obtained decreasing of 81%, and the extraction time could be efficiency from 6 to 2 hours. The microwave extraction process can increase a yield of TiO 2 and significant decreasing the yield of Fe 2 O 3 in a shorter time if compared to the conventional process.

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Preparation of ilmenite (FeTiO3) composite for antimicrobial under UV-visible lights irradiation was carried out to appropriate as a new antimicrobial material. The preparation of FeTiO3 by using sol-gel method was conducted by the titanium tetra-isopropoxide (TTIP) as precursor titania and added Fe(NO3)3 as Fe source. Subsequently, the antimicrobial test (Escherichia coli, Staphylococcus aureus and Candida albicans) was carried out under photocatalysis system. The FeTiO3 was formed on 2θ of 20°, 24°, 36°, 48°, 53° and 62° having crystal size 53.75 nm. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) was investigated that the particle sized was under 100 nm and Fe element peak was on 6.398 keV. The antimicrobial test showedthat the efficiency of 15 % FeTiO3 was active under visible light irradiation to inhibit of E. coli, S. aureus and C. albicans with diameter zone were 18.778, 19.889 and 20.22 mm, respectively.