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All Journal The Journal of Pure and Applied Chemistry Research Indonesian Journal of Chemistry Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Jurnal Sylva Lestari

Ilim Ilim

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, University Of Lampung

Author-ID : 5271981

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Health Professions Materials Science & Nanotechnology Medicine & Pharmacology

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Articles

Catalytic Performance of CaO/SiO2 Prepared from Local Limestone Industry and Rice Husk Silica Kamisah Delilawati Pandiangan; Wasinton Simanjuntak; Ilim Ilim; Heri Satria; Novesar Jamarun
The Journal of Pure and Applied Chemistry Research Vol 8, No 2 (2019): Edition May-August 2019
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2019.008.02.459

This research was conducted to study the performance of CaO/SiO2 prepared from local limestone and rice husk silica as catalyst for transesterification of coconut oil. A series of catalysts with CaO loads of 5, 10, 15, 20, and 25% relative to silica was prepared using sol-gel method, followed by calcination at 700 °C for six hours. The catalysts were then used to evaluate the effect of CaO loads on percent of conversion of coconut oil. Several kinetic factors associated with transesterification was also investigated. The products of transesterification were analyzed using GC-MS technique, revealing that they are composed methyl esters of fatty acid composing coconut oil. Quite significant effect of CaO loads observed, in which the higher the load, the higher the percent of conversion. However, it should be noted that the use of 25% CaO led to formation of soap due to leaching of some CaO from the catalyst. Taking this leaching into account, it was then concluded that percent of conversion of 98.3%, is the best result, which was obtained with the use of catalyst with CaO load of 20%, reaction time of 60 minutes, methanol to oil ratio of 8:1, and the catalyst amount of 5% relative to mass of the oil.

Diseminasi Teknologi Pengolahan Cangkang Biji Karet Menjadi Arang Aktif Berpotensi Industri Kamisah Delilawati Pandiangan; Wasinton Simanjuntak; Mita Rilyanti; Ilim Ilim
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 2 No. 2 (2021)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v2i2.43

Latar belakang kegiatan PKM ini adalah belum tergalinya potensi tanaman karet di lingkungan petani, khususnya pemanfaatan cangkang biji karet sebagai bahan baku pembuatan arang aktif berpotensi industri. Pembuatan arang aktif dengan teknologi pirolisis dan karakterisasi arang meliputi kadar abu, kadar air, dan daya serap terhadap metilen biru dilakukan di Jurusan Kimia Universitas Lampung. Semua kegiatan didokumentasikan dalam bentuk video tutorial dan didiseminasikan kepada aparat dan petani karet di Desa Bumiayu, Provinsi Lampung. Tim pelaksana menjelaskan tentang program PKM, tujuan, luaran dan target kegiatan yakni meningkatkan pengetahuan masyarakat mitra untuk mengolah cangkang biji karet menjadi arang aktif. Video tutorial digunakan sebagai panduan bagi petani yang tertarik untuk mengolah cangkang biji karet menjadi arang aktif dengan pendampingan dan pembinaan secara langsung oleh tim pelaksana.

Synthesis and Characterization of Oligomer 4-Vinylpyridine as A Corrosion Inhibitor for Mild Steel in CO2 Saturated Brine Solution Ilim Ilim; Alan Jefferson; Wasinton Simanjuntak; Marc Jeannin; Yana Maolana Syah; Bunbun Bundjali; Buchari Buchari
Indonesian Journal of Chemistry Vol 16, No 2 (2016)
Publisher : Universitas Gadjah Mada

In this work, the oligomer of 4-vinylpyridine designated as O(4-VP) was synthesized by hydrogen peroxide initiated chain growth polymerization and characterized in terms of molecular weight and structure by matrix assisted laser desorption ionization time of flight mass spectroscopy (MALDI-TOF MS). The oligomer was tested as corrosion inhibitor of mild steel in brine solution saturated with carbon dioxide, with the main purpose to investigate the effect of inhibitor concentrations and temperatures on the inhibition activity defined in terms of corrosion rate and percent of protection. The inhibition tests were carried out using the methods of weight loss (WL) and linear polarization (LP). Characterization using MALDI-TOF MS revealed that the oligomer has the mass (m/z) in the range 200-2400, which corresponds to chain length of 2-22 repeating units. The results of corrosion rate measurements show that the corrosion rate with the use of oligomer is significantly lower than that without inhibitor, demonstrating that the oligomer functioned as effective corrosion inhibitor, while the 4-vinyl pyridine monomer was found to promote the corrosion. It was also found that the protection by the oligomer increased with increasing temperature and it was predicted the oligomer was chemically adsorbed by the surface of the metal.

Pengolahan Limbah Cair Hotel Dengan Kombinasi Metode Elektrokoagulasi Dan Adsorpsi Menggunakan Karbosil Lenny Warlina; Ilim Ilim; Wasinton Simanjuntak
Jurnal Sylva Lestari Vol. 1 No. 1 (2013): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

This study was carried out to investigate treatment of hotel wastewater using a combination of electrocoagulation and adsorption using carbosil prepared from rice husk with pyrolysis method. Electrocoagulation was applied with the aim to remove natural organic matter in the sample, using aluminim as electrodes, with the particular purpose to study the effect of potentials. The treated water was then subjected to adsorption process at different contact times and the performance of the process was evaluated in term of the reduction of the absorbance at maximum wavelength. The performance of the method was defined in term of absorbance reduction at the maximum wavelength of 226 nm, which was determined by scanning the original sample at the wavelength ranging from 200 to 700 nm. According to literature, the maximum wavelength of 226 nm is commonly assigned to benzene structure, most likely from the Alkyl Benzene Sulfonate (ABS) used in detergents. The results obtained indicate that for electrocoagulation process, the highest reduction in the absorbance was achieved using potential of 10 volt. Adsorption process was found to result in the diminish of peak at 226 nm, reflecting that the organic pollutant associated with this wavelength has been completely removed from the water. Characterization of the carbosil using SEM technique revealed that the carbosil has practically homogeneous surface morphology, supporting its ability to adsorb the pollutants from the wastewater. Keywords: adsorption, carbosil, electrocoagulation, hotel wastewater

Studi Pendahuluan Pengolahan Air Payau Menjadi Air Bersih Dengan Metode Kombinasi Elektrokoagulasi Dan Adsorpsi Menggunakan Karbosil Eny Heriani R.N.; Wasinton Simanjuntak; Ilim Ilim
Jurnal Sylva Lestari Vol. 2 No. 1 (2014): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

This study was carried out to investigate treatment of brackish water using a combination of electrocoagulation and adsorption using carbosil prepared from rice husk with pyrolysis method. Electrocoagulation was applied with the aim to remove natural organic matter in the sample, using aluminim as electrodes, with the particular purpose to study the effect of potenstials. For this purpose, electrocoagulation experiments were conducted at potential of 4, 6, and 8 volt at fixed contact time of 60 minutes. The performance of the method was defined in term of absorbance reduction at the wavelengths of 254 and 285 nm, since the absorbance at these two wave lenghts was found to correlate well with the amount of organic matter in the water samples. The treated water was then subjected to adsorption process at different contac times of 5. 10, and 15 minutes, and the performance of the process was evaluated in term of electrical conductivity reduction. The results obtained indicate that for electrocoagulation process, the higest reduction of natural organic matter content was achieved using potential of 8 volt, and adsorption porcess of 15 minutes was found to result in reduction of electrical conductivity from 15.13 mS/cm to 10.10 mS/cm. Characterization of the carbosil using SEM/EDX technique revealed that the carbosil has practically homogeneous surface and able to adsorb salt and several other elements from the brackish water. Keywords: adsorption, brackish water, carbosil, electrocoagulation

Co-Authors Alan Jefferson Buchari Buchari Bunbun Bundjali Eny Heriani R.N. Heri Satria Kamisah Delilawati Pandiangan Kamisah Delilawati Pandiangan Lenny Warlina Marc Jeannin Mita Rilyanti Novesar Jamarun Wasinton Simanjuntak Wasinton Simanjuntak Wasinton Simanjuntak Wasinton Simanjuntak Yana Maolana Syah

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