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Muliadi Ramli
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Energy Immunology & microbiology Neuroscience Physics

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Free Fatty Acids Purification in Biodiesel with Utilizing Rice Husk Silica Muliadi Ramli; Saiful Saiful; Rahmatun Misriana
Jurnal Natural Volume 13, Number 1, March 2013
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (74.742 KB)

Abstract

Silica particles had been successfully separated and extracted from rice husk by using solution of sodium hydroxides (NaOH) as solvent and were characterized with SEM-EDX. The data SEM-EDX showed that the extracted component of the rice husk contained 79,55% (w/w) of silica as the primary component. In order to understand the adsorption capacity of silica in removing free fatty acids (FFA) which were recognized as the contaminants in biodiesel., the profile of time dependence and silica amount in the adsorption process had been investigated in this study. The results indicated that the adsorption process showed optimum condition at 30 minutes with the free fatty acids (about 90,64%) of adsorption). Moreover, the adsorption capacity of silica to those impurities contaminated in biodiesel was proportional to the amount of adsorbent used in the experiment. Finally, biodiesel with less FFA was produced, and the FFA residues remained in the biodiesel were 0,58 mg/g.
PHOTOCATALYTIC DEGRADATION OF INDIGO CARMINE BY TiO2/ACTIVATED CARBON DERIVED FROM WASTE COFFEE GROUNDS Irwan Irwan; Surya Lubis; Muliadi Ramli; Sheilatina Sheilatina
Jurnal Natural Volume 16, Number 1, March 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.285 KB) | DOI: 10.24815/jn.v16i1.4640

Abstract

TiO2/activated carbon derived from waste coffee grounds (TiO2/WCGAC) has been prepared by a sol gel method . Waste coffee ground was chemically activated using hydrochloric acid 0.1 M solution and modified with titanium tetraisopropoxide as TiO2 precursor. The structural features of the photocatalyst was investigated by X-ray diffraction (XRD), scanning electron microscope energy dispersive X-ray spectroscopy (SEM EDX),  Fourier transform infrared spectroscopy (FT-IR) and nitrogen adsorption-desorption. The XRD results showed that TiO2 is anatase and rutile phase, while FTIR spectra confirmed the presence of  Ti-O groups. The specifics surface area of TiO2/WCGAC was higher than that of activated carbon derived from waste coffee grounds. The photocatalytic activity of TiO2/WGCAC has been evaluated for degradation of indigo carmine solution under UV and solar light irradiation. It was found that degradation percentage of indigo carmine under solar light was higher than that of under UV light.
PHOTOCATALYTIC DEGRADATION OF INDIGO CARMINE BY TiO2/ACTIVATED CARBON DERIVED FROM WASTE COFFEE GROUNDS Irwan Irwan; Surya Lubis; Muliadi Ramli; Sheilatina Sheilatina
Jurnal Natural Volume 16, Number 1, March 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v16i1.4640

Abstract

TiO2/activated carbon derived from waste coffee grounds (TiO2/WCGAC) has been prepared by a sol gel method . Waste coffee ground was chemically activated using hydrochloric acid 0.1 M solution and modified with titanium tetraisopropoxide as TiO2 precursor. The structural features of the photocatalyst was investigated by X-ray diffraction (XRD), scanning electron microscope energy dispersive X-ray spectroscopy (SEM EDX),  Fourier transform infrared spectroscopy (FT-IR) and nitrogen adsorption-desorption. The XRD results showed that TiO2 is anatase and rutile phase, while FTIR spectra confirmed the presence of  Ti-O groups. The specifics surface area of TiO2/WCGAC was higher than that of activated carbon derived from waste coffee grounds. The photocatalytic activity of TiO2/WGCAC has been evaluated for degradation of indigo carmine solution under UV and solar light irradiation. It was found that degradation percentage of indigo carmine under solar light was higher than that of under UV light.
Co-Authors Irwan Irwan Rahmatun Misriana Saiful Saiful Saiful Saiful Sheilatina Sheilatina Surya Lubis