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All Journal CHEMISTRY PROGRESS Jurnal Natur Indonesia Jurnal Sains dan Teknologi JURNAL PIJAR Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Biologi Tropis Asian Journal of Agriculture Jurnal Pijar MIPA Makara Journal of Science Jurnal Pepadu Jurnal Pengabdian Inovasi Masyarakat Indonesia Molekul: Jurnal Ilmiah Kimia
Erin Ryantin Gunawan
Chemistry Department FMIPA Universitas Mataram, Jl. Majapahit No. 62 Mataram 83125
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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BIOSORBEN RUMPUT LAUT Sargassum sp. TERAKTIVASI UNTUK REMEDIASI TEMBAGA DARI LIMBAH PENAMBANGAN EMAS TRADISIONAL ., Suriadi; Gunawan, Erin Ryantin; Purwoko, Agus Abhi
CHEMISTRY PROGRESS Vol 5, No 1 (2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.5.1.2012.649

Abstract

Suriadi dkk., 2012. Biosorben rumput laut Sargassum sp. teraktivasi untuk remediasi tembaga dari limbahpenambangan emas tradisional. Penelitian ini bertujuan untuk mengkaji pemanfaatan rumput laut Sargassum sp. teraktivasi asam sulfat(biosorben) untuk remediasi tembaga dari limbah penambangan emas tradisional. Biosorben yangdigunakan diperoleh dengan cara merendam Sargasum sp. dalam larutan 0,05 M asam sulfat selama 20 menit.Sampel air limbah diambil dari tiga lokasi penggelondongan yang terdapat di kecamatan Gerung, LombokBarat. Aspek yang dikaji meliputi (1) kandungan spesi temaga, (2) derajat keasaman (pH) air limbah, dan (3)pengaruh variasi pH limbah dan waktu kontak terhadap kemampuan biosorben. Hasil penelitian inimenunjukkan bahwa pH dan kandungan tembaga air limbah dari lokasi 1 adalah pH = 6,99 dan 25,1 ppm;lokasi 2 pH = 7,01 dan 32,8 ppm; lokasi 3 pH = 7,01 dan 26,7 ppm. Sedangkan pada uji kemampuan biosorbenuntuk remediasi Cu pada limbah diperoleh kondisi optimum pada pH = 5 dengan waktu kontak 90 menit.Kata kunci : biosorben teraktivasi asam, remediasi tembagaSuriadi et al., 2012. Seaweed biosorbent Sargassum sp. activated for copper remediation from traditional goldmining waste. This study is aimed to investigate the potential capacity of acid activated seaweed, Sargassum sp., onbiosorption of Cu from traditional gold mining tailings. The biosorbent was developed by activation ofSargassum sp. with 0.05 M of sulfuric acid for 20 minutes. Aspects investigated include concentration of copperspecies, acidity of the tailing and influence of pH and contact time toward capability of the biosorbent. Thewaste samples were obtained from three locations of traditional mining in Gerung District, West Lombok. Theresults show that the wastes contain copper species in average of 28,2 ppm and acidity in the range of 6,99 –7,01. Meanwhile the optimum conditions for remediation of Cu in the wastes were obtained in pH = 5 and 90minutes of contact time.Keywords : acid activated biosorbent, Cu remediation
Sintesis Senyawa-Senyawa Epoksi dari Asam Lemak Minyak Nyamplung (Calophyllum inophyllum L.) Murniati, Murniati; Gunawan, Erin Ryantin; Suhendra, Dedy; Asnawati, Dina -; Qurba, Pujana
Jurnal Riset Kimia Vol 13, No 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.447

Abstract

Epoxidation is a reaction of a carbon double bond with active oxygen, which results in the addition of an oxygen atom, converting the original double bond into a three-membered epoxide (oxirane) ring. Generally, the raw material for making epoxy comes from petroleum. Nyamplung kernel oil is a non-edible oil that can be used as an alternative raw material for making epoxy derivatives. The purpose of this study was to determine the optimum conditions and characterization of epoxy materials. The fatty acids of Nyamplung kernel oil were reacted formic acid and hydrogen peroxide with sulfuric acid as a catalyst. The optimum condition of the following parameters on the study of this process was investigated: the epoxidation time, temperature, and the mole ratio of formic acid and hydrogen peroxide. The results showed that the optimum reaction conditions with the temperature was 65 oC, the mole ratio of formic acid and hydrogen peroxide was 1:6, and the reaction time was 75 minutes. The results of the characterization under optimum conditions showed the oxirane value of 1.69, the iodine number of 9.63 mg iod/100 g, and the epoxy conversion of 67.6 %. The results of FTIR characterization showed absorption at a wavenumber of 820.03 cm-1 which is a specific absorption from the oxirane ring of the epoxy compound.
PEMBUATAN ARANG AKTIF DARI BATANG JAGUNG MENGGUNAKAN AKTIVATOR ASAM SULFAT DAN PENGGUNAANNYA PADA PENJERAPAN ION TEMBAGA (II) Suhendra, Dedy; Gunawan, Erin Ryantin
Makara Journal of Science Vol. 14, No. 1
Publisher : UI Scholars Hub

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Abstract

Preparation of Activated Carbon from Maize Stems by Sulfuric Acids Activation and Their Application in Copper (II) Ion Sorption. Activated carbons were prepared from maize (Zea mays L.) stems by sulfuric acids activation or chemical methods. The dry maize stems are usually used as low-value energy resources in many countries, burned in the field, or discarded, which are unfavorable to environment. This motivates the investigation of producing value-added products from the dry maize stems, such as activated carbons, as well as solving some environmental problems. The preparation process consisted of sulfuric acid impregnation at different impregnation ratio followed by carbonization at 250–400 o C for 1–4 h. The results show that the impregnation ratio was 1.25, the optimum activation temperature was 300 o C and the activation time was 1 h. The sorption capacity of the activated carbon was 25.1 mg/g.
Biochemical Characterization of Ketapang Lipase: Its Preference to Short-Chain Fatty Acids despite the Long-Chain Fatty Acids Dominant Content Faradis, Taritsu Hazal; Pomeistia, Meilynda; Basri, Nurul Hasan; 'Ardhuha, Jannatin; Gunawan, Erin Ryantin; Savalas, Lalu Rudyat Telly
Molekul Vol 18 No 2 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.2.8302

Abstract

Lipases are versatile enzymes with high specificity toward lipid substrate. They have many industrial applications, such as in food, pharmacy, and green fuel. So far, most explored lipases are from microbial and animal sources, whereas those from plants are less studied. The present study aims to characterize ketapang (Terminalia catappa Linn) lipase. The lipase was isolated from germinating ketapang seeds. The activity was determined by hydrolysis of virgin coconut oil (VCO). Biochemical characterization of ketapang lipase includes the optimum temperature, pH, kinetics, metal ions addition, and analysis of substrate specificity. It was shown that ketapang lipase has an optimum temperature of 45 oC, pH 7.5. Ca2+ increases the lipase activity, whereas Na+, K+, Mg2+, Zn2+, Fe2+, and Cu2+ inhibit ketapang lipase to various extents. A comparison of SDS-PAGE and native-PAGE analysis showed that ketapang lipase consists of several protein subunits. A further test by in-gel assay revealed that the 54 kDa, 35 kDa, two bands at ~16 kDa, and 12 kDa proteins showed lipolytic activity against a-naphthyl palmitate substrate. When tested on various chromogenic fatty acid substrates, ketapang lipase showed the highest specificity against short-chain fatty acids (C4 and C8), despite the fact that ketapang oil seed composes mainly of long fatty acid (C18). Since lipases that have high lipolytic activity toward short fatty acids are considered esterases, the esterase activity of ketapang lipase is yet to be determined.
EDUKASI ANTIOKSIDAN ALAMI DALAM MINYAK NABATI NON PANGAN DI KELOMPOK WANITA PKK DESA BAGIK POLAK LABUAPI LOMBOK BARAT Handayani, Sri Seno; Suhendra, Dedy; Gunawan, Erin Ryantin; Murniati, Murniati; Arlia, Erma
Jurnal Pepadu Vol 5 No 4 (2024): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v5i4.5916

Abstract

Antioksidan merupakan zat kimia yang membantu menangkal radikal bebas. Antioksidan alami dalam ditemukan didalam tanaman tertentu dan telah terbukti melindungi sel manusia dari kerusakan oksidatif. Tanaman yang mengandung antioksidan alami dan belum termanfaatkan secara maksimal antara lain adalah kelor, nyamplung dan ketapang. Kegiatan pengabdian ini dilakukan dengan memberikan edukasi kepada ibu-ibu PKK desa Bagik Polak Lombok Barat untuk meningkatkan pengetahuan akan bahaya antioksidan sintetik yang terkandung dalam berbagai sediaan kosmetik. Sumber antioksidan alami dapat diperoleh dari tanaman pangan non komersil. Salah satu tanaman yang dimanfaatkan aktivitasnya sebagai antioksidan yaitu tanaman kelor (Moringa oleifera Lam). Ekstrak daun kelor mempunyai aktivitas antioksidan karena mengandung senyawa flavonoid dan beta karoten. Sedangkan minyak biji kelor mengandung asam-asam lemak yang memiliki aktivitas antioksidan yang baik. Kegiatan pengabdian ini dilaksanakan dalam beberapa tahap, yaitu: (1) Sosialisasi pengetahuan tentang antioksidan, sumber antioksidan dan bahaya dari antioksidan sintetik (2) Pelatihan pembuatan bahan pangan menggunakan sumber antioksidan alami (3) evaluasi hasil kegiatan pengabdian. Ibu-ibu kelompok Wanita PKK sangat antusias dan semangat selama mengikuti kegiatan pengabdian. Kegiatan ini telah memberikan tambahan pengetahuan tentang antioksidan alami dalam minyak nabati non pangan yang berasal dari tumbuhan dan tanaman yang tidak termanfaatkan dengan baik.
Kajian Pengaruh Suhu Pemanasan Awal Dan Waktu Sokletasi Terhadap Perolehan Minyak Biji Kelor (Moringa Oleifera Lam.) Handayani, Sri Seno; Gunawan, Erin Ryantin; Suhendra, Dedy; Murniati, Murniati
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 4 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i4.754

Abstract

Sound healing, or commonly referred to as music therapy using Acoustic Sound for Wellbeing (ASW) Moringa seed oil (Moringa oleifera Lam.) has significant potential for use in various industrial sectors, including food, pharmaceuticals, and cosmetics. One of the critical factors influencing oil extraction efficiency is preheating treatment and extraction process duration. This study aims to evaluate the effect of varying preheating temperatures and Soxhlet extraction times on the yield of Moringa seed oil, as well as to determine the most optimal extraction conditions. The extraction process was conducted using the Soxhlet method with n-hexane as the solvent. Preheating temperatures used in this study ranged from room temperature to 50°C, 60°C, and 70°C, with extraction times of 2, 4, and 6 hours. The results showed that preheating treatment on moringa seeds and extraction duration had a significant impact on oil yield. The optimal conditions were achieved at a preheating temperature of 70°C with an extraction time of 6 hours, yielding the highest oil recovery of 41.74%.
Effect of Acid Catalyst on Epoxydation Reaction of Nyamplung Seed Oil Saputri, Dita Ayu; Suhendra, Dedy; Gunawan, Erin Ryantin; Murniati, Murniati
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i1.6338

Abstract

Epoxy is a cyclic ether compound that contains an oxirane group and has been widely applied as a stabilizer, plasticizer in polyvinyl chloride (PVC), surfactant, pesticide raw material, and as a polymer resin coating. The raw materials in epoxy synthesis come from petroleum derivatives, which are non-renewable natural resources. Therefore, there is a need for alternative raw materials that can be renewed, such as vegetable oil. In this study, nyamplung seed oil was used. Epoxy synthesis is usually carried out using carboxylic acid epoxidation with the help of an acid catalyst. This research aims to determine the effect of the type of acid catalyst and its concentration on the epoxidation reaction of nyamplung seed oil and the characterization of the epoxy produced. The research results show that using an acid catalyst can increase the formation of oxirane groups at a certain concentration, where the highest oxirane number value was obtained when using the H2SO4 catalyst, namely 3.15%. The resulting epoxy is pale yellow, has a typical absorption area (COC) at a wave number of 825 cm-1, an iodine value of 13.96 g iod/100 g, a viscosity of 20.80 cP, and a relative per cent conversion to oxirane of 73.4 %
Extraction and Characterization of Moringa Seed Oil Results from Soxhletation and Screw Pressing Handayani, Sri Seno; Gunawan, Erin Ryantin; Suhendra, Dedy; Murniati, Murniati; Bali, Rizka Dhia Khalilah; Sari, Gita Sagita
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i1.8245

Abstract

Moringa seed oil is a vegetable oil that has many benefits for health and the pharmaceutical industry. Moringa seed oil can be extracted either chemically or mechanically. This research aims to characterize moringa seed oil’s physicochemical properties and fatty acid composition using soxhletation chemical extraction and screw-pressing mechanical extraction with various pretreatment temperatures of 50, 60, and 70°C. The research showed that the highest yield of moringa seed oil, 41.74%, was obtained at an initial treatment temperature of 70°C using the soxhletation method for 6 hours. The acid value of moringa seed oil from soxhletation is 2.01 mg KOH/g, and screw pressing is 4.37 mg KOH/g. The iodine number from soxhletation was 66.62 mg iod/100g, and screw pressing was 60.27 mg iod/100g. The density of the oil from soxhletation and screw pressing is 0.922 mg/mL and 0.934 mg/mL, respectively, with an oil viscosity of 3.298 cP and 3.424 cP. The results of GC-MS analysis show that moringa seed oil from soxhletation has an oleic acid composition of 40.92%, while the screw pressing has an oleic acid composition of 22.50%. This finding demonstrates the influence of extraction methods on the fatty acid profile, particularly the concentration of oleic acid, a key component of moringa seed oil. These results contribute to understanding how specific extraction techniques can optimize the quality of moringa seed oil.
Optimasi Sintesis Biodiesel dari Minyak Biji Nyamplung (Calophyllum inophyllum) Melalui Reaksi Transesterifikasi Menggunakan Katalis TiO2 Arlia, Erma; Gunawan, Erin Ryantin; Murniati, Murniati; Handayani, Sri Seno; Suhendra, Dedy
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.759

Abstract

Dependence on solar power needs can be overcome by switching to renewable energy, namely biodiesel. Biodiesel can be synthesized from non-food vegetable oil, namely nyamplung seed oil, with the help of a catalyst. The aim of this research is to optimize the synthesis of biodiesel from nyamplung seed oil through a transesterification reaction using a TiO2 catalyst. Variations in reaction conditions include the mole ratio of oil: methanol, catalyst mass, reaction time and reaction temperature. The optimum conditions for biodiesel synthesis were obtained at mole ratio of oil: methanol  1:8; catalyst 0.15 g; reaction time 150 minutes and reaction temperature 60℃ with an average yield of 76.54%. The characteristics of the biodiesel obtained include  0.877 g/mL of density, 3.65 cSt of viscosity,   234.217 mg KOH/g of saponification value, and 2.1 mg NaOH/g of acid value. The chemical composition of biodiesel resulting from GC-MS is methyl palmitate, methyl oleate and methyl stearate.
Pengenalan dan Demonstrasi Berbagai Teknik Pemisahan untuk Meningkatkan Pemahaman Siswa SMA Negeri 1 Batukliang Lombok Tengah Pada Mata Pelajaran Kimia Kelas XI Gunawan, Erin Ryantin; Suhendra, Dedy; Handayani, Sri Seno; Aini, Diah Miftahul; Adiguna, Sya’ban Putra; Yanti, Sepia Dwi; Usiana, Shilan; Rischia, Amida
Jurnal Pengabdian Inovasi Masyarakat Indonesia Vol. 4 No. 2 (2025): Edisi Agustus
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpimi.v4i2.7903

Abstract

This Community Service activity was conducted at SMA Negeri 1 Batukliang, Central Lombok, a senior high school offering a science (IPA) program and supported by the availability of a chemistry laboratory. The school faces several challenges, including a curriculum that has yet to incorporate real-life applications of chemistry, limited student understanding of chemical separation techniques, and inadequate laboratory facilities and infrastructure. This community service program aimed to introduce and demonstrate various separation techniques including extraction, distillation, and chromatography through interactive lectures, educational videos, and simple hands-on experiments, including processes like extraction, Soxhletation, and distillation. Through this activity, students not only gained theoretical knowledge but also practical experience in applying separation techniques and observing the products generated from these processes. This initiative aligns with the Sustainable Development Goals (SDGs), particularly in supporting quality education. The program is expected to enhance students’ scientific literacy and serve as an initial step toward raising awareness of the importance of chemistry in everyday life.
Co-Authors 'Ardhuha, Jannatin A. Wahab Jufri A.A. Ketut Agung Cahyawan W Adiguna, Sya’ban Putra Agus Abhi Purwoko Ali Djamhuri Anggi Solehah Arlia, Erma Azumi, Baiq Miftah Balafif, Ragaya Abd. R Bali, Rizka Dhia Khalilah Basri, Nurul Hasan Dedy Suhendra Diah Miftahul Aini Dina Asnawati Emmy Yuanita Erin Ryantin Gunawan Faradis, Taritsu Hazal Farida Ariani Gunawan Gunawan Izzati, Assifa Joni Rokhmat Lalu Haris Budiarto, Lalu Haris LALU RUDYAT TELLY SAVALAS Lely Kurniawati Lilik Mariana Listantia, Nora Mahiran Basri Murniati Murniati . Murniati Murniati Nurhidayanti . Pomeistia, Meilynda Qurba, Pujana Ragaya Abd. R. Balafif Rahmiati Rahmiati Ramdani, Nanila Rischia, Amida Rozitawati, Mona Saputri, Dita Ayu Sari, Gita Sagita Siska Ayu Wulandari, Siska Ayu Sri Seno Handayani Sri Seno Handayani Sukarso, A. A. Sukiman Sukiman Suriadi . Suriadi Suriadi Usiana, Shilan Yanti, Sepia Dwi Yayuk Andayani Zaer, Ziana