Articles
<![CDATA[Removal of Pb(II) using Hydroxyapatite from Golden Snail Shell (Pomacea canaliculata L.) Modified with Silica ]]>
<![CDATA[Poedji Loekitowati Hariani]]>;
<![CDATA[Fahma Riyanti]]>;
<![CDATA[Fatma Fatma]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Aldi Herbanu]]>
<![CDATA[ Molekul Vol 15, No 2 (2020) ]]>
Publisher : <![CDATA[Universitas Jenderal Soedirman ]]>
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DOI: 10.20884/1.jm.2020.15.2.641
<![CDATA[The composites of hydroxyapatite and SiO2 were successfully synthesized. The hydroxyapatite was prepared from golden snail shells (Pomacea canaliculata L). The hydroxyapatite and hydroxyapatite-SiO2 composites were characterized using XRD, FTIR, SEM-EDS. Furthermore, hydroxyapatite and hydroxyapatite-SiO2 composites were used to remove Pb(II) from aqueous solution. Various adsorption parameters such as pH of the solution, contact time, and initial Pb(II) concentration were used to study the adsorption process. The optimum pH of the solution for removal of Pb(II) by hydroxyapatite and hydroxyapatite-SiO2 composite at pH 6 and contact time at 60 minutes. Both adsorbents follow the Langmuir isotherm. The maximum adsorption capacity of the hydroxyapatite-SiO2 composite is greater compare to hydroxyapatite, respectively 135.14 and 123.46 mg/g. The pseudo-second order kinetic model had a correlation coefficient (R2) greater than the pseudo-first order so pseudo-second order kinetic is better to describe adsorption kinetics]]>
<![CDATA[Comparison of Cr/C and Cr2O3/Z Catalysts on Hydrocracking of Bio Oil from Pyrolysis of Palm Empty Fruit Bunches ]]>
<![CDATA[Zainal Fanani]]>;
<![CDATA[Hasanuddin hasanuddin]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Muhammad Said]]>
<![CDATA[ Molekul Vol 16, No 3 (2021) ]]>
Publisher : <![CDATA[Universitas Jenderal Soedirman ]]>
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DOI: 10.20884/1.jm.2021.16.3.812
<![CDATA[Bio-oil derived from palm empty fruit bunch is not suitable for fuel purpose due to high acidity and low heating. Cr2O3/Zeolite and Cr/C catalysts was developed to upgrade bio-oil through hydrocracking. The catalyst prepared via impregnation method followed by oxidation-reduction. Ammonia and pyridine adsorption used to evaluate acidity as well as crystallinity assessment by using XRD. Hydrocracking reaction conducted in hydrogen gas flow rates 0.5-3.0 L/min, the surface area of Cr/C catalyst found out 1,497.07-1,652.58 m2/g, whilst the temperatures 450 to 700 ℃ and the catalyst weights between 0.5 to 2.5 g. Acidity calculated from ammonia and pyridine adsorption shows Cr2O3/Zeolite has higher value compare to pristine Zeolite. XRD pattern shows Cr2O3/Zeolite has high crystallinity as indicated by sharp and pointed diffraction peaks. The optimum condition of hydrocracking confirmed by lower density of liquid product. The variables obtained by a separate experiments shows that H2 gas flow rate best at 2.5 L/min, temperature of hydrocracking 500 ℃ for Cr2O3/Zeolite and 600oC for Cr/C whereas weight of Cr2O3/Zeolite catalyst is 1.5 g. The Cr/C catalyst that gave low density product possess 1,554.48 m2/g surface area. GCMS data shows increase on the number of straight chain compounds within the hydrocracking product.]]>
<![CDATA[PENGGUNAAN KATALIS PALADIUM DALAM REAKSI ARILASI n-OKTILSILAN DENGAN 2-IODIDA-5-METIL TIOFEN ]]>
<![CDATA[Aldes Lesbani]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Risfidian Mohadi]]>;
<![CDATA[Eliza Eliza]]>
<![CDATA[ Molekul Vol 9, No 1 (2014) ]]>
Publisher : <![CDATA[Universitas Jenderal Soedirman ]]>
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DOI: 10.20884/1.jm.2014.9.1.146
<![CDATA[Telah dilakukan proses arilasi n-oktilsilan dengan 2-iodida-5-metil tiofen mengunakan katalis palladium dengan teknik reaksi kopling untuk mendapatkan variasi senyawa hasil arilasi. Produk hasil arilasi yang terbentuk dimurnikan dengan metode kromatografi kolom silika dengan eluen etil asetat dan dikarakterisasi menggunakan spektroskopi massa, spektroskopi 1H NMR, 13C NMR, dan DEPT-135. Hasil penelitian menunjukkan bahwa senyawa yang terbentuk dari hasil arilasi yakni tris(5-metil-2-tiofen)oktilsilan yang berupa cairan tak berwarna dengan nilaim/z sebesar 432. Hasil pengukuran menggunakan spektroskopi 1H NMR menghasilkan tujuh proton ekivalen. Pengukuran menggunakan spektroskopi 13C NMR menghasilkan tiga belas karbon ekivalen yang kemudian dikonfirmasi dengan DEPT-135. Hasil karakterisasi menggunakan spektroskopi massa dan spektroskopi NMR (H dan C) menunjukkan senyawa hasil sintesis adalah tris(5-metil-2-tiofen)oktilsilan.]]>
<![CDATA[Produksi Tablet Kosmetika Herbal Buah Tembesu Untuk Perawatan Kulit dan Wajah ]]>
<![CDATA[Addy Rachmat]]>;
<![CDATA[Julinar Julinar]]>;
<![CDATA[Desnelli Desnelli]]>;
<![CDATA[Dasril Basir]]>
<![CDATA[ JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) VOL. 4 NOMOR 2 SEPTEMBER 2020 JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) ]]>
Publisher : <![CDATA[Lembaga Publikasi Ilmiah dan Penerbitan (LPIP) ]]>
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DOI: 10.30595/jppm.v4i2.6018
<![CDATA[Buah Tembesu (Fragraea fragrans) memiliki metabolit sekunder asam ursolat, asam oleanolat, dan alkaloid gentianin. Senyawa metabolit sekunder ini telah diteliti dan dapat dimanfaatkan sebagai antiinflamasi, antikanker, antibakterial, antiaging, antifungal, antiviral, antialergik. Senyawa flavonoid juga teridentifikasi pada buah ini yang dapat digunakan sebagai antioksidan dan peredam radikal bebas penahan ageing; dan tanin trimer sebagai antikerut (antiwrinkle). Produk kosmetika herbal dari buah Tembesu telah diuji dan memberikan manfaat bagi peningkatan kesehatan kulit dan wajah. Warga di Desa Limbang Jaya II memiliki pemukiman yang kaya akan pohon Tembesu. Kegiatan pengabdian berupa penyuluhan dan pelatihan pembuatan kosmetika alam akan memberikan nilai lebih bagi hasil alam di desa tersebut. Produk kosmetika ini lebih disukai oleh remaja milenial saat ini karena tidak saja halal tetapi juga berkhasiat untuk perawatan tanpa ada efek samping karena hanya mengandung bahan alami.]]>
<![CDATA[Modification of Fishbone-Based Hydroxyapatite with MnFe2O4 for Efficient Adsorption of Cd(II) and Ni(II) from Aqueous Solution ]]>
<![CDATA[Poedji Loekitowati Hariani]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Muhammad Said]]>;
<![CDATA[Salni Salni]]>
<![CDATA[ Indonesian Journal of Chemistry Vol 21, No 6 (2021) ]]>
Publisher : <![CDATA[Universitas Gadjah Mada ]]>
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DOI: 10.22146/ijc.66888
<![CDATA[Due to their toxicity, Cd(II) and Ni(II) ions in the environment are severe. The hydroxyapatite composite was improved with magnetic MnFe2O4 to remove Cd(II) and Ni(II) ions from an aqueous solution. Hydroxyapatite was extracted from Snakehead (Channa striata) fish bones via alkaline-heat treatment. The hydroxyapatite/MnFe2O4 composite performance was analyzed through XRD, FTIR, SEM-EDS, BET analysis, and VSM, and the results reveal that the hydroxyapatite/MnFe2O4 composite shows good magnetic properties of 21.95 emu/g. The kinetics evaluation confirmed that the pseudo-second-order kinetics model was more suitable to describe the adsorption of Cd(II) and Ni(II) ions by hydroxyapatite/MnFe2O4 composite from the solution. The Langmuir isotherm model was suitable to describe the adsorption process of the Cd(II) and Ni(II) ions, where the adsorption capacities for Cd(II) and Ni(II) are 54.3 and 47.4 mg/g, respectively. Desorption of Cd(II) and Ni(II) ions from hydroxyapatite/MnFe2O4 composite using NaCl as the eluent was more effective than EDTA. The findings of this study indicate that hydroxyapatite/MnFe2O4 can reduce Cd(II) and Ni(II) ions in wastewater so that it can recover natural resources.]]>
<![CDATA[Pembuatan dan Penyuluhan Virgin Coconut Oil di Desa Tanjung Seteko Indralaya dan Manfaatnya Untuk Kesehatan ]]>
<![CDATA[Nurlisa Hidayati]]>;
<![CDATA[Hermansyah Hermansyah]]>;
<![CDATA[Ferlinahayati Ferlinahayati]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Ahmad Fatoni]]>
<![CDATA[ Jurnal Kreativitas Pengabdian Kepada Masyarakat (PKM) Vol 5, No 7 (2022): Volume 5 No 7 Juli 2022 ]]>
Publisher : <![CDATA[Universitas Malahayati Lampung ]]>
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DOI: 10.33024/jkpm.v5i7.6192
<![CDATA[ ABSTRAK Telah dilaksanakan kegiatan pengabdian kepada masyarakat Desa Tanjung Seteko Indralaya. Tujuan kegiatan ini adalah untuk memberikan informasi kepada masyarakat tentang: pengolahan buah kelapa menjadi virgin coconut oil (VCO) dan demonstrasi pembuatan dan pemanfaatan VCO. Kegiatan Pengabdian kepada Masyarakat ini diikuti 20 orang ibu rumah tangga dan remaja putri yang berasal dari desa Tanjung Seteko. Kegiatan yang dilaksanakan adalah memperkenalkan teknologi pembuatan VCO. Selain itu dilakukan juga diskusi dan demonstrasi penggunaan VCO sebagai ramuan yang berguna bagi kesehatan. Penyuluhan yang dilakukan mendapat tanggapan yang positif dari masyarakat. Kegiatan diskusi dan tanya jawab juga mendapat perhatian yang tinggi dari masyarakat. Masyarakat merasa senang karena mendapatkan pengetahuan dan keterampilan tentang teknologi pembuatan VCO. Dengan diberikannya penyuluhan masyarakat juga menjadi faham cara membuat ramuan berbahan dasar VCO. Masyarakat juga berharap kegiatan pengabdian dapat berlangsung secara berkelanjutan, sehingga wawasan mereka akan terus bertambah baik. Kata Kunci: Pembuatan, Penyuluhan, VCO ABSTRACT Community service activities in Tanjung Seteko village Indralaya have been carried out. The purpose of this activity is to provide information to the public about: processing coconuts into virgin coconut oil (VCO) and demonstrations of making and using VCO. This community service activity was attended by 20 housewives and young women from Tanjung Seteko village. The activity carried out to introduce the technology of making Virgin Coconut Oil. In addition, discussions and demonstrations on the use of VCO as an ingredient that is useful for health were also held. The counseling carried out received a positive response from the community. Discussion and question and answer activities also received high attention from the community. People are happy because they get knowledge and skills about VCO manufacturing technology. By providing public education, they also understand how to make VCO-based ingredients. The community also hopes that service activities can take place in a sustainable manner, so that their knowledge will continue to improve. Keywords: Making, Counseling, VCO]]>
<![CDATA[ISOTERM ADSORPSI-DESORPSI DAN POROSITAS KATALIS Ag-TiO 2 /ZEOLIT ]]>
<![CDATA[Hasanudin Hasanudin]]>;
<![CDATA[Addy Rachmat]]>
<![CDATA[ Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 7 No. 2 (2010): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam ]]>
Publisher : <![CDATA[Universitas PGRI Palembang ]]>
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DOI: 10.31851/sainmatika.v7i2.10
<![CDATA[ABSTRAKPenelitian tentang Isoterm Adsorpsi-Desorpsi dan Porositas Katalis Ag –TiO 2 /Zeolit telah dilakukan. Katalis ini dibuat dengan penambahan oksida logam TiO 2 dan impregnasi logam Ag dengan variasi jumlah logam Ag yaitu 1%, 10%, 20%. Karakterisasi katalis meliputi pola topografi dengan Scanning Electron Microscope (SEM) dan analisis isoterm adsorpsi dengan menggunakan Gas Sorption Analyzer.Tipe isoterm adsorpsi yang terbentuk berdasarkan klasifikasi BDDT adalah tipe II dan isoterm desorpsi yang terbentuk berdasarkan klasifikasi BET adalah tipe C. Hasil penelitian menunjukkan bahwa adanya pori yang membesar akibat penambahan logam TiO 2 sehingga meningkatkan luas permukaan spesifik, total volume pori, dan jari-jari pori rata-rata katalis. Pengaruh impregnasi logam Ag pada katalis mampu menurunkan luas permukaan katalis senilai 129,94% dan menurunkan total volume pori senilai 34,81% namun dapat meningkatkan jari-jari pori rata-rata senilai 70,56%.Kata kunci: Zeolit, porositas, katalis]]>
<![CDATA[Penyuluhan dan Demonstrasi Pemanfaatan Produk Berbasis Virgin Coconut Oil sebagai Produk Perawatan Kulit di Masyarakat Desa Tanjung Seteko Indralaya Ogan Ilir Sumatera Selatan ]]>
<![CDATA[Ahmad Fatoni]]>;
<![CDATA[Nurlisa Hidayati]]>;
<![CDATA[Fatma Fatma]]>;
<![CDATA[Nirwan Syarif]]>;
<![CDATA[Addy Rachmat]]>
<![CDATA[ Jurnal Kreativitas Pengabdian Kepada Masyarakat (PKM) Vol 6, No 4 (2023): Volume 6 No 4 April 2023 ]]>
Publisher : <![CDATA[Universitas Malahayati Lampung ]]>
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DOI: 10.33024/jkpm.v6i4.9137
<![CDATA[ABSTRAK Telah dilaksanakan kegiatan pengabdian kepada masyarakat di desa Tanjung Seteko Indralaya dengan tema pembuatan produk perawatan kulit berbasis Virgin Coconut Oil. Tujuan kegiatan ini adalah untuk memberikan informasi kepada masyarakat tentang pembuatan dan pemanfaatan VCO menjadi produk yang berguna untuk perawatan kulit. Metode pembuatan VCO adalah dengan metode basah dan pemanfaatannya sebagai perawatan kulit berbasis VCO dengan menambahan ekstrak buah cengkeh ke dalam produk VCO. Kegiatan Pengabdian kepada Masyarakat (PKM) ini telah diikuti 25 orang ibu rumah tangga dan remaja putri yang berasal dari Desa Tanjung Seteko. Dalam penyuluhan dan demonstrasi ini terjadi kegiatan diskusi dan tanya jawab antara tim PKM dengan para peserta. Hal ini menunjukan proses penyuluhan dan demonstrasi yang telah dilakukan mendapat respon yang baik dari para peserta. Kegiatan PKM ini telah meningkatkan pengetahuan peserta tentang cara pembuatan dan pemanfaatan VCO sebagai produk perawatan kulit. Kata Kunci: Pembuatan, Pemanfaatan, VCO, Ekstrak Buah Cengkeh ABSTRACT Community service activities have been carried out in the village of Tanjung Seteko Indralaya with the theme making of skin care product based on Virgin Coconut Oil. The purpose of this activity is to provide information to the public about the making and utilization of VCO into useful products for skin care. The method of making VCO is the wet method and its use as a VCO-based skin care by adding clove fruit extract into VCO products. This Community Service activity was attended by 25 housewives and young women from Tanjung Seteko Village. The resulting VCO product is supplemented by clove fruit water extract as a VCO-based skin care product. In this discussion and demonstration, there was an activity question and answer between the Community Service Team and the participants. This showed that the process of extension and demonstrations that have been carried out have received a good response from the participants. The Community Service has increased knowledge of the participants how to make and use VCO as a skin care product. Keywords: Making, Utilization, VCO, Clove Fruit Extract]]>
<![CDATA[The Electrochemical Conversion of CO2 into Methanol with KHCO3 Electrolyte Using Membrane Electrode Assembly (MEA) ]]>
<![CDATA[Dedi Rohendi]]>;
<![CDATA[Nyimas Febrika Sya’baniah]]>;
<![CDATA[Edy Herianto Majlan]]>;
<![CDATA[Nirwan Syarif]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Dwi Hawa Yulianti]]>;
<![CDATA[Icha Amelia]]>;
<![CDATA[Dimas Ardiyanta]]>;
<![CDATA[Isya Mahendra]]>;
<![CDATA[Rr. Whiny Hardiyati Erliana]]>
<![CDATA[ Science and Technology Indonesia Vol. 8 No. 4 (2023): October ]]>
Publisher : <![CDATA[Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya ]]>
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DOI: 10.26554/sti.2023.8.4.632-639
<![CDATA[The electrochemical conversion process of CO2 into methanol using Membrane Electrode Assembly (MEA) has been done. The MEA consists of a Pt/C catalyst in the cathode and a Cu2O ZnO/C catalyst in the anode. The electrodes were made using the spraying method and then characterized using Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) methods to determine the ECSA (Electrochemical Surface Area) and electrical conductivity values. Besides that, also X-Ray Diffraction (XRD) and Scanning Electrode Microscopy – Energy Dispersive X-Ray (SEM-EDX) analysis was to determine the crystal and morphological structure. The voltammogram from CV analysis indicated that the ECSA value on the Pt/C electrode was 7.2 m2/g and the Cu2O-ZnO/C electrodes as 0.69 m2/g. The electrode’s electrical conductivity value with Pt/C catalyst was 1.15 x 10−3 S/cm, and the electrode with Cu2O-ZnO/C catalyst was 0.80 x 10−3 S/cm. The results of the XRD analysis confirmed the presence of Cu2O and ZnO on the Cu2O-ZnO/C electrode and Pt on the Pt/C electrode. Meanwhile, the results of the SEM-EDX analysis showed that the Pt/C catalyst was spread more evenly with a larger percentage than Cu2O and ZnO. The result of the conversion of CO2 to methanol was measured using a methanol analyzer with variations in KHCO3 electrolyte concentration, variation of temperature operation, and variation of time operation. The best methanol concentrations after distillation process were 79.06 w/v %, with 1 M KHCO3, at room temperature and 2 hours operation.]]>
<![CDATA[CuAl LDH/Rice Husk Biochar Composite for Enhanced Adsorptive Removal of Cationic Dye from Aqueous Solution ]]>
<![CDATA[Neza Rahayu Palapa]]>;
<![CDATA[Tarmizi Taher]]>;
<![CDATA[Bakri Rio Rahayu]]>;
<![CDATA[Risfidian Mohadi]]>;
<![CDATA[Addy Rachmat]]>;
<![CDATA[Aldes Lesbani]]>
<![CDATA[ Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 2 Year 2020 (August 2020) ]]>
Publisher : <![CDATA[Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS) ]]>
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DOI: 10.9767/bcrec.15.2.7828.525-537
<![CDATA[The preparation of CuAl LDH and biochar (BC) composite derived from rice husk and its application as a low-cost adsorbent for enhanced adsorptive removal of malachite green has been studied. The composite was prepared by a one-step coprecipitation method and characterized by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Brunauer-Emmett-Teller (BET), and Scanning Electron Microscopy - Energy Dispersive X-ray (SEM−EDX). The result indicated that CuAl LDH was successfully incorporated with the biochar that evidenced by the broadening of XRD peak at 2θ = 24° and the appearance of a new peak at 1095 cm−1 on the FTIR spectra. The BET surface area analysis revealed that CuAl/BC composite exhibited a larger surface area (200.9 m2/g) that the original CuAl LDH (46.2 m2/g). Surface morphological changes also confirmed by SEM image, which showed more aggregated particles. The result of the adsorption study indicated the composite material was efficient in removing malachite green with Langmuir maximum adsorption capacity of CuAl/BC reaching 470.96 mg/g, which is higher than the original CuAl LDH 59.523 mg/g. The thermodynamic analysis suggested that the adsorption of malachite green occurs spontaneously (ΔG < 0 at all tested temperature) and endothermic nature. Moreover, the CuAl/BC composite showed strong potential as a low-cost adsorbent for cationic dye removal since it showed not only a high adsorption capacity but also good reusability. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ]]>
