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All Journal Journal of Degraded and Mining Lands Management Indonesian Food Science and TechnologyJournal Martabe : Jurnal Pengabdian Kepada Masyarakat Walisongo Journal of Chemistry Jurnal Kartika Kimia Journal of Community Based Environmental Engineering and Management Hydrogen: Jurnal Kependidikan Kimia Jurnal Pustaka Mitra : Pusat Akses Kajian Mengabdi Terhadap Masyarakat Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Literasi: Jurnal Pengabdian Masyarakat dan Inovasi Seminar Ilmiah Nasional Teknologi, Sains, dan Sosial Humaniora (SINTESA) Jurnal Pengabdian Masyarakat (JPM) Pinang Masak Journal of Mathematics, Computation and Statistics (JMATHCOS) Journal of Mathematics, Statistics, and Applications
Dhian Eka Wijaya
Universitas Jambi
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Library & Information Science Mathematics Physics Public Health Social Sciences Other

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Autokorelasi Pada Pembentukan Grafik Kendali Komponen Utama Rasyid, Nur Ahniyanti; Wijaya, Dhian Eka; Firmayasari, Dian; Harianto; Pratama, Muhammad Isbar
Journal of Mathematics, Computations and Statistics Vol. 5 No. 2 (2022): Volume 05 Nomor 02 (Oktober 2022)
Publisher : Jurusan Matematika FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The formation of control chart for autocorrelated data can not be done. This research aims to analyse the effect of autocorrelated data on the formation of principal component control chart. A case study was performed on simulated data with two variables and they were applied on the data of climate elements in Makassar city including air temperature, solar radiation, air humadity,and wind speed. The analysis of the effect of the autocorrelated data was conducted inthree steps, namely: (1) the establishment of the structure of variance-covariance matrix of the autocorrelated data; (2) the establishment of principal component control chart based on the largest eigen valu; and (3) In forming of simulation with two variables. The result indicate that if the data are negatively autocorrelated with avalue of -0,9-(-0,5), the controllimits will be widened, and if the value is -0,5-(-0,1), the control limits will be narrowed.
Penerapan Metode Rantai Markov dalam Memprediksi Hasil Panen Tanaman Padi di Kabupaten Bulukumba Dhian Eka Wijaya; Rasyid, Nur Ahniyanti
Journal of Mathematics, Computations and Statistics Vol. 7 No. 2 (2024): Volume 07 Nomor 02 (Oktober 2024)
Publisher : Jurusan Matematika FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/jmathcos.v7i2.4432

Abstract

Tanaman padi merupakan salah satu komoditas pangan utama yang diproduksi di Indonesia. Kabupaten Bulukumba merupakan salah satu kabupaten di Sulawesi Selatan, Indonesia yang memiliki potensi besar dalam memproduksi padi. Namun, petani di Kabupaten Bulukumba masih menghadapi tantangan terkait ketidakpastian hasil panen. Hal ini disebabkan oleh berbagai faktor yang mempengaruhi hasil panen, sehingga sulit untuk memprediksi hasil akhir panen dan mengantisipasi fluktuasi produksi padi. Dengan mempertimbangkan faktor-faktor stokastik tersebut, maka diperlukan suatu analisis yang mampu memodelkan dan meramalkan perilaku dinamis dari sistem produksi padi di Kabupaten Bulukumba. Salah satu metode analisis yang dapat diterapkan adalah Rantai Markov. Metode ini merupakan suatu proses stokastik yang menggambarkan urutan peristiwa yang mungkin, di mana probabilitas setiap kejadian hanya bergantung pada keadaan sebelumnya. Penelitian ini bertujuan untuk mengetahui hasil panen tanaman padi di Kabupaten Bulukumba pada tahun 2024-2026. Data yang digunakan pada penelitian ini adalah data hasil panen padi pada sepuluh Kecamatan di Kabupaten Bulukumba tahun 2014-2023. Hasil penelitian menunjukkan prediksi total panen padi seluruh kecamatan di Kabupaten Bulukumba adalah 278.245,30 ton pada tahun 2024; 278.306,90 ton pada tahun 2025; dan 278.319,10 ton pada tahun 2026. Nilai Mean Absolute Percentage Error (MAPE) sebesar 8,445%, dengan kondisi steady state diperkirakan terjadi pada tahun 2028.
Optimization of Nanobentonite-CuO Adsorption for Reducing 3-MCPDE, Free Fatty Acids, and Peroxide Values in Bulk Cooking Oil: A Study of Adsorption Efficacy and Isotherm Modeling Permana, Edwin; Naswir, Muhammad; Hidayat, Ali Nurdin Hidayat; Wijaya, Dhian Eka; Rahayu, Martina Astri; Wazzan, Huda
Indonesian Food Science and Technology Journal Vol. 8 No. 1 (2024): Volume 8. Number 1, December 2024 |IFSTJ|
Publisher : Department of Technology of Agricultural product (THP) Jambi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/ifstj.v8i1.36390

Abstract

Indonesia is the largest palm oil producing country in the world. A factor that affects the quality of cooking oil is the presence of diglycerides and free fatty acids. Diglycerides in palm oil serve as precursors for the carcinogenic chemical 3-Monochloropropane-1,2-diol ester (3-MCPDE), whilst elevated concentrations of free fatty acids (ALB) might compromise oil stability. Numerous investigations indicate that the cooking oil present in the population includes the 3-MCPDE molecule at levels ranging from 8,150 to 58,140 ug/kg. The maximum permissible amount is 2 ug of 3-MCPDE per kilogram of body weight per day. The pillarization process involves the amalgamation of Cu(NO3)2 and NaOH inside an activated bentonite solution. The adsorption analysis of 3-MCPDE employing nanobentonite-CuO was performed using Gas Chromatography Mass Spectrometry (GC-MS) in accordance with the AOCE Cd 29a-2013 method, while free fatty acid and peroxide values were evaluated by a titration method that accounted for temporal variations. The peak efficacy of Nanobentonite-CuO in adsorbing the 3-MCPDE molecule was seen at 15 minutes, with an adsorption efficiency of 52.4%. Peroxide numbers achieved ideal performance at 45, 60, and 75 minutes, with an adsorption efficiency of 80%, whilst free fatty acids reached top performance at 75 minutes with an adsorption efficiency of 76.69%. The adsorption of 3-MCPDE compounds, free fatty acids, and peroxide content by Nanobentonite-CuO, as indicated by Adsorption Isotherm modeling, conforms to the Freundlich Isotherm, implying a physical adsorption mechanism.
Development of Particle Board Biocomposite From Coffee Skin and Tofu Dregs With Polyethylene Plastic Adhesive As Furniture Interior Hidayat, Ali Nurdin; Permana, Edwin; Wijaya, Dhian Eka; Pratama, Yoga; Zufri, Fauzi
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13802

Abstract

The need for particle board interiors is still in great demand to be used as wood-sourced interiors. In line with this, currently the problem of waste is still a fairly complex problem, both organic and inorganic waste. Coffee rinds and tofu pulp are organic wastes that have not been optimally utilized. Therefore, research was conducted on the manufacture of particleboard from coffee rinds and tofu pulp with PP plastic adhesive which aims to reduce the rate of deforestation due to tree felling as raw material for interior manufacturing and to control the environment by utilizing waste in the community into functional products. This study aims to determine the best formulation of particleboard made from Polyethylene plastic, coffee bean hulls and tofu pulp. Tofu dregs need to be preserved by soaking the dregs for 48 hours in a 5% glycerol solution and 15% NaCl solution in a 50:50 ratio. Then soaked for 48 hours. soaking 15.121%. To determine a good particleboard formulation, a physical evaluation of the particleboard was carried out including particleboard density test, water absorption test, moisture content test, thickness development test and instrumentation testing using SEM to see the surface structure of the particleboard.  Based on the results of physical testing, the best formulation of particleboard biocomposites was obtained, namely the ratio of 70:30 (% w/b) (70% of tofu pulp and coffee bean skin and 30% of PET plastic) which is in accordance with SNI 03-2105-2006 standards. Biocomposite particleboard formulation 70:30 (% w/b) has a density of 0.60186 gr/cm3, water absorption of 95.395%, moisture content of 2.248% and an increase in thickness after soaking of 15.121%.
PENGUATAN KOMPETENSI GURU IPA SMA NEGERI 11 KOTA JAMBI PADA PENGGUNAAN APLIKASI CHEMDRAW Riski Gusti, Diah; Lestari, Intan; Marlinda, Lenny; Rahmi, Rahmi; Eka Wijaya, Dhian
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 8, No 2 (2025): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v8i2.777-782

Abstract

Pendidikan merupakan bagian penting dari pembangunan suatu negara karena membantu generasi muda memperoleh pengetahuan dan keterampilan yang diperlukan untuk menghadapi tantangan yang akan datang. . Dalam pendidikan Indonesia, guru di bidang ilmu pengetahuan alam harus memiliki pemahaman yang mendalam tentang konsep kimia, biologi, dan fisika. Tujuan kegiatan pengabdian ini adalah dalam rangka mengoptimalkan potensi teknologi dalam meningkatkan kualitas pembelajaran IPA di SMA Negeri 11 Kota Jambi. Penguatan kompetensi guru dalam penggunaan aplikasi ChemDraw menjadi suatu kebutuhan yang mendesak. Melalui peningkatan kompetensi ini, diharapkan para guru dapat lebih mandiri dalam merancang dan melaksanakan pembelajaran yang inovatif dan menarik, sehingga dapat meningkatkan ketertarikan dan pemahaman siswa terhadap materi pelajaran IPA. Dengan adanya pelatihan dan pendampingan penggunaan aplikasi ChemDraw, guru-guru IPA telah mengetahui dan penerapan penggunaan aplikasi ChemDraw.
Optimization of Bentonite Thermal Activation for Reducing Fe Metal and Organic Substance in Peat Water Hidayat, Ali Nurdin; Permana , Edwin; Wijaya , Dhian Eka
Journal of Community Based Environmental Engineering and Management Vol. 9 No. 1 (2025): March 2025
Publisher : Department of Environmental Engineering - Universitas Pasundan - Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jcbeem.v9i1.22962

Abstract

Peat water is water produced from decaying trees and plants that contain Fe metal with a high content of organic substances. Therefore, effective and efficient peat water treatment is needed to make it suitable for consumption. Bentonite is a natural source of adsorbent but has a fairly low adsorption activity, so bentonite needs to be activated to increase its adsorption ability. Thermal activation was chosen due to its environmentally friendly process and can increase the surface area and adsorption ability of bentonite. This study was conducted to see the effect of bentonite thermal activation with temperatures of 200, 300, 400 and 500˚C in reducing Fe metal content, organic matter, TDS and pH of peat water. The results show that thermal activation of bentonite can reduce the content of these compounds. Thermal activation of bentonite at 500˚C reduced Fe metal content with 66% efficiency and 0.08 mg/g adsorption capacity, 89.6% organic matter with 24,60 mg/g adsorption capacity and TDS 27 mg/l.
Aplikasi Algoritma Semut Pada Penentuan Rute Terpendek Sistem Pengangkutan Sampah Kota Makassar Nur Ahniyanti Rasyid; Dhian Eka Wijaya
Journal of Mathematics, Statistics and Applications Vol. 1 No. 01 (2024): November
Publisher : PT. Lontara Digitech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61220/jmsa.v1i1.20241.58

Abstract

Waste management is one of the problems faced by the City of Makassar, so an effective and efficient system is needed for more regular waste transportation at each TPA. This study aims to optimize the waste transportation system in Makassar City by determining the shortest route. The research method was carried out by taking 8 TPA points and determining the optimal shortest route using the ant algorithm. The ant algorithm is an algorithm adopted from the behavior of ant colonies. The application of the ant algorithm shows the result in the form of the optimal shortest route with a route length of 40.2 km with the route V5→V1→V4→V7→V6→V2→V8→V5. The calculation is based on the use of one starting point, where the starting point is the center of route determination to various landfills.
Green Extraction of Bioactive Compounds from Peronema canescens Jack. Using Sodium Acetate/Glycerol-Based Natural Deep Eutectic Solvents as a Source of Natural Antioxidants Tarigan, Indra Lasmana; Sinurat, Julius Alvin Novensius; Ramadhan, Iham Ifandi; Wijaya, Dhian Eka; Puspitasari, Ratih Dyah; Sowe, Momodou Salieu
Jurnal Kartika Kimia Vol 8 No 1 (2025): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i1.864

Abstract

Peronema canescens Jack (commonly known as sungkai) is an endemic medicinal plant native to Sumatra and Kalimantan, known for its broad spectrum of pharmacological activities, including antioxidant, antibacterial, antidiabetic, antihyperuricemic, and anti-inflammatory effects. These properties are largely attributed to its high content of bioactive phenolic and flavonoid compounds. Conventional extraction techniques typically utilize organic solvents such as ethanol or methanol, which raise concerns regarding toxicity, cost, and environmental sustainability. This study explores a green extraction strategy employing Natural Deep Eutectic Solvents (NADES), formulated from sodium acetate and glycerol at varying molar ratios, to optimize the recovery of antioxidant compounds from sungkai leaves. The extraction process involved maceration for 2 × 24 hours. FTIR analysis identified key functional group absorptions (O–H, C–H, C=C), with distinct spectral shifts and intensity variations, indicating interactions between NADES components and bioactive molecules. Among the four tested formulations, NADES 4 (sodium acetate:glycerol, 1:3) yielded the highest total phenolic and flavonoid contents, and exhibited the strongest antioxidant activity, with an IC50 value of 32.30 ppm—classified as very strong and comparable to ascorbic acid. These results demonstrate that the compositional adjustment of NADES significantly influences solvent polarity and extraction efficiency, underscoring their promise as sustainable alternatives for the extraction of natural antioxidants.
Application of bentonite-chitosan nanocomposites for the adsorptive removal of iron and natural organic matter in peat water Permana, Edwin; Naswir, M.; Wijaya, Dhian Eka; Hidayat, Ali Nurdin; Nurjamil, Dimas Setya; Prayogi, Andrian Setyarestu
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8107

Abstract

Peat water, commonly found in peatland regions, often poses a challenge as a water source due to its high content of iron and natural organic matter (NOM). This research investigated the development and application of bentonite–chitosan nanocomposites as an effective adsorbent for reducing iron metal and NOM concentrations in peat water. Chitosan was synthesized from tilapia fish scales through demineralization, deproteinization, and deacetylation processes, then characterized for moisture content (7.4%), ash content (5.4%), and functional groups using FTIR spectroscopy. Bentonite was thermally and chemically activated with sulfuric acid to increase its adsorption capacity. Nanocomposites were prepared with varied bentonite-to-chitosan ratios (90:10, 70:30, 50:50) using sodium tripolyphosphate (STPP) as a crosslinker. FTIR and XRD analyses confirmed the formation of nanocomposites and revealed structural changes post-adsorption, including reduced crystallinity and increased particle size. Adsorption studies showed that the 90%Bt-10%Ch3 formulation achieved the highest iron removal efficiency (68.6%) with an adsorption capacity of 0.084 mg/g. Meanwhile, the 50%Bt-50%Ch3 formulation demonstrated the highest NOM removal efficiency (36.8%) with a capacity of 36.80 mg/g. The results indicate that bentonite is more effective for iron adsorption, while chitosan plays a key role in removing NOM due to its amine and hydroxyl functional groups. This study highlights the potential of utilizing fishery waste and natural minerals to produce low-cost, eco-friendly nanocomposites for improving water quality in peatland environments.
Co-Authors Adelia, Ayu Afrimanisa, Afrimanisa Al Faruqi, Fiqri Ali Nurdin Hidayat Ali Nurdin Hidayat Aminuyati Ardian Salsa Rusmana Arif, M. Ridwan Arsa, Daniel Denny Prabawa, Aditya Diah Riski Gusti Dian Firmayasari Edwin Permana Edwin Permana Faizar Farid Firmayasari, Dian Harianto Harianto Harianto Hariestya Viareco Hidayat, Ali Nurdin Hidayat, Ali Nurdin Hidayat Hidayat, Dara Shalsa Billah Indra Lasmana Tarigan Indrian, Okta Intan Lestari Juita, Febri Khairul Alim Lenny Marlinda Lince Muis Maharani Maharani, Maharani Martina Asti Rahayu Muhammad Damris Muhammad Isbar Pratama Munifilia Ekasari Nabawi, Moh Naswir, M. Naswir, Muhammad Nelson Nelson Nur Ahniyanti Rasyid Nur Hikmah Nurjamil, Dimas Setya Permana , Edwin Prayogi, Andrian Setyarestu Puspitasari, Ratih Dyah Rahayu, Martina Astri Rahmi Rahmi Ramadhan, Iham Ifandi Ramdhan, Furkon Sinurat, Julius Alvin Novensius Sowe, Momodou Salieu Utami, Andita Wazzan, Huda Yunita Chaya, Helen Zufri, Fauzi