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All Journal Jurnal Natur Indonesia Science and Technology Indonesia Indonesian Journal of Chemistry ALKIMIA : Jurnal Ilmu Kimia dan Terapan Jurnal Teori dan Aplikasi Fisika Indonesian Journal of Energy Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Sinar Sang Surya: Jurnal Pusat Pengabdian kepada Masyarakat Journal of Multidisciplinary Applied Natural Science Buguh: Jurnal Pengabdian Kepada Masyarakat Makara Journal of Science Bulletin of Chemical Reaction Engineering & Catalysis Analit: Analytical And Environmental Chemistry
Wasinton Simanjuntak
Universitas Lampung
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences

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The Use of Carbon Dioxide Released from Coconut Shell Combustion to Produce Na2CO3 Simanjuntak, Wasinton; Sembiring, Simon; Zakaria, Wan Abbas; Pandiangan, Kamisah D
Makara Journal of Science Vol. 18, No. 3
Publisher : UI Scholars Hub

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Abstract

In this investigation, sodium carbonate (Na2CO3) was produced by reacting the CO2 released from coconut shell combustion with NaOH solution with molar concentrations of 6.5, 7.0, 7.5, and 8.0 M. The main purpose of the study was to assess the potential of the proposed method for mitigation of the CO2 gas released into the atmosphere by the coconut shell industry. The Na2CO3 powder produced was oven-dried at 110 oC and subsequently characterized using FTIR, XRD, and SEM/EDS techniques. Thermal analysis was also carried out using DTA/TGA to investigate the thermal mechanisms of sodium carbonate formation. The experimental results show that the concentration of NaOH influences the mass of sodium carbonate produced, with the highest mass of 190.6 g obtained using 7.0 M NaOH solution. The FTIR analyses show the existence of O-H, C-O, C=O, and CO3 -2, confirming the formation of Na2CO3. The C-S functional group was also detected most likely due to the presence of the sulfur that naturally exists in the coconut shell. The formation of Na2CO3 is also supported by the presence of C, Na, and O on the EDS results and the presence of the thermonatrite (Na2CO3.H2O) phase, as seen by the XRD. The XRD analysis of the sintered sample at 450 oC indicates the transformation of thermonatrite into sodium carbonate and sodium oxide, which is in accordance with the results of DTA/TGA analysis. Based on the results obtained, it is concluded that the proposed method can be applied to mitigation of CO2 gas released by the coconut shell industry.
X-ray Diffraction Phase Analyses of Mullite Derived from Rice Husk Silica Sembiring, Simon; Simanjuntak, Wasinton
Makara Journal of Science Vol. 16, No. 2
Publisher : UI Scholars Hub

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Abstract

X-ray Diffraction Phase Analyses of Mullite Derived from Rice Husk Silica
THE USE OF THE RIETVELD METHOD TO STUDY THE PHASE COMPOSITION OF CORDIERITE (Mg2Al4Si5O18) CERAMICS PREPARED FROM RICE HUSK SILICA Simanjuntak, Wasinton; Sembiring, Simon
Makara Journal of Science Vol. 15, No. 1
Publisher : UI Scholars Hub

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This research presents the use of the Rietveld method to study the phase composition of cordierite (MG2AL4SI5O18) ceramics prepared from rice husk silica, after the samples were sintered at 1300, 1400 and 1500 °C. The formation of cordierite is temperature-dependent as indicated by the relative phase composition obtained from x-ray diffraction patterns for the cordierite and spinel increased markedly with increasing temperature, i.e, from 38.98 to 54.15 wt% and from 11.81 to 17.99 wt % following the increase in temperature from 1300-1500 °C, respectively. The above values were obtained with the aid of the Rietveld method, carried out until the goodness of fit values (GoF) reached below 2, which is considered a satisfactory value to reveal the real phase composition. Different plots produced by refinement using the Rietveld method also reveal a reasonable fit between the observed and the calculated plot, demonstrating the usefulness of the method for calculating the quantity of phase composition in the sintering process
Sodium Methoxide Catalyzed Preparation of Nitrogen Compounds from Palm Oil Methyl Esters as Corrosion Inhibitor Ilim; Hidayah, Laila; Yuliyanda, Devi; Delilawati Pandiangan, Kamisah; Simanjuntak, Wasinton
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.113-119

Abstract

This research was conducted to study preparation of nitrogen compounds by reacting palm oil derived methyl esters and diethanolamine using sodium methoxide as a catalyst. The chemical composition of the product was analyzed using the gas chromatography-mass spectrometry (GC-MS) method. The product was then applied as a corrosion inhibitor for mild steel in CO2 saturated 3% NaCl solution. Experimental results indicate that the reaction product contains six nitrogen compounds with a relative percentage of 63.7%, and the rest 36.7% are a mixture of unreacted diethanolamine and unreacted methyl esters. The results of the corrosion experiments show that the product obtained exhibited appreciably high performance as reflected by a percentage of protection (%P) of 96.85%. The performance of the product as a corrosion inhibitor is also supported by the SEM image of the mild steel sample, which shows that the surface of the sample is well protected. The results of this work demonstrate that nitrogen compounds obtained have promising potential as corrosion inhibitors, particularly to prevent corrosion by CO2 gas.
Transformation of Lampung Natural Zeolite into Zeolite-A by Aluminium Addition and Application as Catalyst for Biomass Pyrolysis Aulia, Syayyidati; Simanjuntak, Wasinton; Pandiangan, Kamisah Delilawati; Rilyanti, Mita
Indonesian Journal of Energy Vol. 7 No. 2 (2024): Indonesian Journal of Energy
Publisher : Purnomo Yusgiantoro Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33116/ije.v7i2.199

Abstract

In this study, the transformed zeolite from Lampung natural zeolite (LNZ) was used as a catalyst for the pyrolysis of a mixture of cassava tubers and rubber seed oil to produce bio crude oil (BCO). Transformation of Lampung natural zeolite into zeolite-A was attempted by adjusting the Si/Al ratios to 1.0, 1.5, and 2.0 transformed with and without aluminum addition and hydrothermal method with variation Si/Al ratio of 1.0; 1.5 and 2.0. The resulting products were specified as Zeo-C, Zeo-R1, Zeo-R1.5 and Zeo-R2.0. XRD analysis results show that Zeo-C and Zeo-R2 were transformed into zeolite-P, while zeolite-A, as targeted, was found in Zeo-R1 and Zeo-R1.5. SEM analysis results were also in accordance with XRD analysis results that showed the bipyramid crystal of zeolite-P in Zeo-C and Zeo-R2, while the cubic crystal of zeolite-A in Zeo-R1 and Zeo-R1.5. The BCO produced by using Zeo-C and Zeo-R1.5 as catalysts has the highest hydrocarbon content of 81% and 98%, respectively. Compared to previous studies, our study introduces an innovative approach by utilizing LNZ, a resource that has not been extensively explored, and combining cassava and rubber seed oil to produce bio-crude oil with a high hydrocarbon content. Our study contributes by promoting the use of underutilized biomass resources, potentially providing an environmentally friendly and economically viable alternative for BCO production.
Lampung Natural Zeolite Dopped with of ZnO-TiO2 Metal Oxide as Catalyst for Biodiesel Production Al Muttaqii, Muhammad; Marbun, Maja Pranata; Priyanto, Sugeng; Sibuea, Andreas; Simanjuntak, Wasinton; Syafaat AM, Fuad; Silalahi Raja, Havier Samuel Huttur; Alviany, Riza; Maryani, Tri; Sulistyaningsih, Triastuti; Prasetyo, Erik; Sudibyo, Sudibyo; Yati, Indri
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 1 Year 2024 (April 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20038

Abstract

Research has been carried out on making biodiesel from palm oil using natural zeolite catalysts impregnated with metal oxides such as zinc oxide and titanium oxide. This research aims to produce biodiesel using natural zeolite and ZnO-TiO2/NZ catalysts. The catalysts were analyzed using X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), Scanning Electron Microscope (SEM), and Brunauer-Emmet-Teller (BET). The catalyst was tested in the transesterification reaction to produce biodiesel. The mole oil and methanol ratio varied from 1:15, 1:18, and 1:20. In addition, the biodiesel product was analyzed using Gas Chromatography-Mass Spectroscopy (GC-MS). The results showed the optimum condition for converting triglycerides to 1:18 variation of oil:methanol was 60.53%using a ZnO-TiO2/NZ catalyst. The ZnO-TiO2/NZ catalyst is very promising for use as a catalyst for converting palm oils into biodiesel.
The Effect of MgO Loads on Catalytic Activity of MgO/SiO2 in Coconut Oil Transesterification Pandiangan, Kamisah Delilawati; Simanjuntak, Wasinton; Ilim, Ilim; Alista, Diska Indah; Noviana, Erika
Journal of Multidisciplinary Applied Natural Science Vol. 5 No. 2 (2025): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.257

Abstract

This research aims to obtain biodiesel by transesterification of coconut oil with MgO/SiO2 as a catalyst, with the objective to examine the effect of MgO loads on the performance of the catalysts expressed in terms of oil conversion. The MgO/SiO2 composites with different mass ratios of 1:1, 1:2, 1:3, 1:5, and 1:10 were synthesized from Mg(NO3)·6H2O and SiO2 extracted from rice husk silica using sol-gel method and followed by calcination at 800 °C for 6 h. The produced catalysts were then tested in the transesterification of coconut oil to investigate the effect of catalyst composition, oil to methanol ratios, and reaction times. The experiments were carried out using a fixed catalyst load of 10% oil (w/v) and at 70 °C. The catalyst with the highest performance was then characterized by using X-ray diffraction (XRD) and scanning electron microscopy (SEM) to confirm the formation of crystalline MgO/SiO2. The highest conversion of the transesterification product was analyzed using gas chromatography-mass spectrometry (GC-MS) technique to confirm the biodiesel production. The XRD diffractogram of the synthesized sample is characterized by the presence of sharp peaks confirming the existence of the sample as crystalline material attributed to the pyroxene-ideal (MgO3Si) phase. The existence of the sample as crystalline material is also supported by the absence of a broad diffraction peak attributed to amorphous rice husk silica, and SEM image of the sample which is characterized by the visible existence of crystalline structure in the forms of platelet prismatic, and tetrahedral shaped structures. The results demonstrated that the highest conversion (98%) was achieved with the use of MgO/SiO2 (1:5) as a catalyst, a ratio of oil to methanol of 1:6, and a reaction time of 4 h. The formation of methyl esters was confirmed by the results of GC-MS analysis.
Enhancing Electrical Characteristics in a High-Power Seawater Battery: Solutions with Acid Zinc Anolyte and Alumina-Carbon-Cement Separator Pauzi, Gurum Ahmad; Surtono, Arif; Suciyati, Sri Wahyu; Syafriadi, Syafriadi; Samosir, Ahmad Saudi; Sulistiyanti, Sri Ratna; Simanjuntak, Wasinton
Journal of Multidisciplinary Applied Natural Science Vol. 5 No. 2 (2025): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.267

Abstract

The potential of seawater as a source of galvanic cell energy has not been fully realized due to significant challenges, particularly anode degradation in single-compartment high-power seawater batteries. This study addresses these limitations by introducing a novel two-compartment system, utilizing an acid zinc anolyte and an alumina-carbon-cement separator designed to enhance both the electrical performance and longevity of the battery. Experimental results demonstrate a remarkable increase in current output (97.81 times) and a substantial boost in power (5.25 times) compared to conventional single-compartment cells. Furthermore, the internal resistance of the system is reduced by 95.7%, indicating improved energy transfer efficiency. The use of the alumina-carbon-cement separator effectively mitigates anode corrosion, a common issue that limits the operational lifespan and reliability of seawater batteries. These findings suggest that the proposed two-compartment configuration not only overcomes critical technical barriers but also offers a promising and sustainable alternative for renewable energy generation from seawater. The enhanced performance and durability of this system highlight its potential for practical applications in marine and coastal energy harvesting, contributing to the advancement of clean energy technologies.
PENDAMPINGAN KELOMPOK DASAWISMA RT 003/ RW 001 DUSUN BATARANILA HAJIMENA LAMPUNG SELATAN DALAM PENGOLAHAN SAMPAH RUMAH TANGGA MENJADI PRODUK BERNILAI EKONOMIS Pratama, Dian Septiani; Ilim, Ilim; Pandiangan, Kamisah Delilawati; Simanjuntak, Wasinton
BUGUH: JURNAL PENGABDIAN KEPADA MASYARAKAT Vol. 5 No. 1 (2025): Maret 2025
Publisher : Badan Pelaksana Kuliah Kerja Nyata Universitas Lampung

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Abstract

Sampah rumah tangga yang diproduksi setiap hari dapat menyebabkan permasalahan penumpukan sampah dan bau. Pengolahan sampah di Tingkat rumah tangga dapat menjadi solusi efektif dalam menanggulangi permasalahan tersebut. Sosialisasi dan pelatihan tentang pengolahan sampah rumah tangga pada masyarakat Dasawisma RT 03 RW 01 Dusun Bataranila, Desa Hajimena, Kecamatan Natar, Kabupaten Lampung Selatan menjadi salah satu solusi untuk meningkatkan pemahaman dan keterampilan Masyarakat dalam pengolahan sampah rumah tangga. Kegiatan pengabdian meliputi pemaparan materi dan pelatihan pemilahan sampah, pemanfaatan sampah organik dan non organik menjadi bernilai ekonomis melalui pembuatan eco-enzim, kompos, eco-brick dan pablostik.
Electrocoagulation for Cattle Slaughterhouse Wastewater Management: A Review of Technologies and Treatment Parameters Sugiharta, Iip; Kiswandono, Agung Abadi; Pandiangan, Kamisah Delilawati; Simanjuntak, Wasinton
Indonesian Journal of Chemistry Vol 25, No 3 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.102193

Abstract

The management of slaughterhouse wastewater presents significant environmental challenges due to its high organic load, fat, oil, and persistent pollutants. Electrocoagulation (EC) is an effective treatment method that utilizes electric currents to generate in situ coagulants for pollutant removal. This review examines key operational parameters of EC, including current density, pH, electrode type, and contact time, while comparing its performance with electro-oxidation (EO) and coagulation-flocculation (CF). The findings indicate that EC effectively reduces Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), and turbidity with relatively low operational costs. Integrating EC with CF and EO improves treatment efficiency by addressing complex wastewater characteristics. Optimization of parameters, energy consumption reduction, and electrode durability enhancements are recommended for improving EC performance. Bibliometric analysis using VOSviewer highlights the increasing research focus on energy efficiency, electrode materials, and process optimization. A graphical abstract is provided to illustrate EC’s role in wastewater treatment, highlighting its effectiveness, optimization strategies, and integration potential. Future research should focus on scaling up industrial applications and integrating predictive models to enhance efficiency and sustainability in slaughterhouse wastewater management.
Co-Authors Afra Nabila Saputri Agung Abadi Kiswandono Ahmad Pauzi, Gurum Ahmad Saudi Samosir Al Muttaqii, Muhammad Alista, Diska Indah Amrulloh, Hanif Anjarwati, Arie Atika Nisrina Aulia, Syayyidati Damayanti, Putri Delilawati Pandiangan, Kamisah Diki Hidayat Emantis Rosa Eniya Listiani Dewi Erik Prasetyo Fajriyati, Nurul Faranida, Qori Hikmah Gom, Frangky Gom Hidayah, Laila Iip Sugiharta Ilim Ilim Ilim Ilim, Ilim Irwan Ginting Suka Kamisah D Pandiangan Kamisah Delilawati Pandiangan Luthfia, Hanna Marbun, Maja Pranata MARIA BINTANG Maryani, Tri Mita Rilyanti Mita Rilyanti Ninid Widya Sari Lubis Nisa, Mia Abi Noviana, Erika Nurhasanah Husin Nurhasanah Nurhasanah Oktivianty, Shella Windi Pandiangan, Kamisah D Pandiangan, Kamisah Delilawati Pauzi, Gurum Ahmad Pratama, Dian Septiani Pulung Karo-Karo Rinawati Rinawati Riyanti, Faulia Riza Alviany Sabil, Muhammad Sibuea, Andreas Silalahi Raja, Havier Samuel Huttur Simon Sembiring Simon Sembiring Simon Sembiring Situmeang, Rudy T M Sri Ratna Sulistiyanti Sri Wahyu Suciyati Sugeng Priyanto, Sugeng Supriyanto Supriyanto Surtono, Arif Sutopo Hadi Syafaat AM, Fuad Syafriadi Syafriadi Tasyadinia, Tasyadinia Tati Suhartati Triastuti Sulistyaningsih Visiamah, Fenti Wan Abbas Zakaria Wan Abbas Zakaria Yandri Yandri yati, indri Yuliyanda, Devi Zipora Sembiring