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All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Jurnal Teknik Kimia USU Jurnal Ilmu Kebencanaan : Program Pascasarjana Unsyiah Jurnal Serambi Engineering Jurnal Nasional Komputasi dan Teknologi Informasi Aptisi Transactions on Technopreneurship (ATT) Jurnal Sains dan Teknologi Reaksi Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences REACTOR : Journal of Research On Chemistry And Engineering Jurnal Pemerintahan dan Kebijakan (JPK) Jurnal Teknologi Jurnal Pusat Inovasi Masyarakat Aceh International Journal of Science and Technology Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) JIPI (Jurnal IPA dan Pembelajaran IPA) Leuser Journal of Environmental Studies Grimsa Journal of Science Engineering and Technology Jurnal Teknik Sipil Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan IJES : Indonesian Journal of Environmental Sustainability. Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) JURNAL REKAYASA KIMIA & LINGKUNGAN
Suhendrayatna Suhendrayatna
Chemical Engineering Department, Faculty Of Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia, 23111
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Eco Enzyme Hasil Pengolahan Sampah Sayuran dan Buah-Buahan sebagai Produk Pembersih di Desa Lamgapang Febriani Febriani; Rini Safitri; Suhendrayatna Suhendrayatna; Ichwana Ichwana; Sofia Sofia; Mahidin Mahidin
Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Perguruan Tinggi Mengabdi: Berkarya dan Berinovasi Untuk Membangun Masyarakat Semakin Tangguh di Mas
Publisher : Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS)

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

Abstract

Sampah organik seperti sisa sayuran dan buah-buahan merupakan sampah rumah tangga yang hampir 60% dibuang pada Tempat Pembuangan Akhir (TPA) yang diolah dengan sistem open dumping. Kontribusi TPA dari sistem open dumping menyebabkan sebesar 3-4 % dihasilkan emisi Gas Rumah Kaca (GRK) global. Tujuan kegiatan pengabdian dilakukan untuk memberikan informasi, pelatihan dan pendampingan pembuatan produk eco enzyme dengan teknologi fermentasi sehingga dapat dimanfaatkan sebagai produk harian rumah tangga. Kegiatan ini dilaksanakan di desa Lamgapang secara bertahap di antaranya sosialisasi, pelatihan, pendampingan dalam pembuatan dan aplikasi produk eco enzyme sebagai cairan pembersih serbaguna. Hasil yang diperoleh dari kegiatan ini bertambahnya pengetahuan dan keterampilan mitra dalam mengolah sampah sayuran dan buah-buahan menjadi produk eco enzyme. Mitra telah memanfaatkan eco enzyme sebagai cairan pembersih seperti pembersihan lantai, kaca, kamar mandi, dan badan-badan air di rumah tangga sehingga dapat menekan penggunaan cairan pembersih komersial dan pengeluaran keluarga. Eco enzyme yang telah digunakan untuk membersihkan badan air (selokan) diketahui dapat memperbaiki kualitas air. Kondisi ini ditunjukkan terjadi perbaikan nilai pH, TDS, BOD, COD, DO, fosfat dan beberapa ion logam yang terdapat di badan-badan air. Hasil pengabdian menunjukkan bahwa produk eco enzyme dapat digunakan sebagai cairan pembersih multifungsi bagi masyarakat.Keyword : Eco Enzyme, Sampah organik, ramah lingkungan, pembersi multiguna
Analisis Kualitas Air Permukaan DAS Alas-Singkil Untuk Monitoring Tingkat Pencemaran Air Permukaan Zulkifli AK; Bahagia Bahagia; Suhendrayatna Suhendrayatna; Vera Viena
Jurnal Nasional Komputasi dan Teknologi Informasi (JNKTI) Vol 4, No 6 (2021): Desember 2021
Publisher : Program Studi Teknik Komputer, Fakultas Teknik. Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jnkti.v4i6.4660

Abstract

Abstrak -  Kualitas air permukaan yang mengalir di Daerah Aliran Sungai (DAS)Alas Singkil perlu dilakukan analisis komponen/indikator lingkungannya. Pengukuran kualitas air sungai akibat adanya pencemaran. DAS Alas Singkil menaungi delapan sungai di Kota Subulussalam yang bergabung membentuk sungai. Tujuan penelitian adalah untuk menganalisis tingkat pencemaran air sungai Wilayah Sungai (WS) Alas-Singkil dengan parameter uji Total suspended Solid (TSS), pH, kandungan oksigen dan kadar logam. Hasil penelitian menunjukkan suhu daerah aliran sungai (DAS) Alas Singkil menunjukkan kisaran antara 27,4 – 29,1 °C. Suhu dapat mempengaruhi fotosintesis di sungai wilayah Alas Singkil baik secara langsung maupun tidak langsung. Hasil uji TDS menunjukkan nilai 23,9 mg/L - 97,5 mg/L yang masih berada dibawah baku mutu. Lokasi paling tinggi TDS berada pada titik Sungai Lae Kombih (AP2) dan nilai paling rendah pada lokasi Sungai Lae Soraya (AP1). Hasil uji menunjukkan bahwa  nilainya masih dibawah baku mutu yaitu 1.000 mg/L. Hasil uji TSS antara  4 -36 mg/L. Konsentrasi TSS semua lokasi tidak melebihi baku mutu yang telah ditetapkan oleh Peraturan Pemerintah RI No. 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup untuk Kelas Air II.  Hasil uji pH lebih stabil dan berada dalam kisaran yang sempit yaitu 6,82–8,86 pH karena dipengaruhi oleh kapasitas penyangga (buffer) yaitu adanya sedimentasi aliran sungai.  Hasil uji kadar logam : tembaga (CU), Timbal (Pb), Cadmium (Cd) dan Seng (Zn) pada Daerah Aliran Sungai (DAS) Alas  Singkil menunjukkan masih barada dalam ambang batas dengan hasil uji Laboratoirum dibawah baku mutu yaitu 0,0008 b , 0,0001 b , 0,0004 b dan 0,0001 b  (Tidak terdeteksi karena berada di bawah Batas Minimum Deteksi Alat Uji).  Kata kunci : Air permukaan, DAS, kualitas, pencemaran air sungai, pemantauan dan penertiban.  Abstract –  The quality of surface water flowing in the Alas Singkil Watershed (DAS) needs to be analyzed for environmental components/indicators. Measurement of river water quality due to pollution. The Alas Singkil watershed covers eight rivers in Subulussalam City which combine to form rivers. The purpose of the study was to analyze the level of water pollution of the Alas-Singkil River Basin (WS) with the test parameters of Total suspended Solid (TSS), pH, oxygen content and metal content. The results showed that the temperature of the Alas Singkil watershed showed a range between 27.4 – 29.1 °C. Temperature can affect photosynthesis in the Alas Singkil river area either directly or indirectly. The TDS test results showed a value of 23.9 mg/L - 97.5 mg/L which was still below the quality standard. The highest location for TDS is at the point of the Lae Kombih River (AP2) and the lowest value is at the location of the Lae Soraya River (AP1). The test results show that the value is still below the quality standard of 1000 mg/L. TSS test results between 4 -36 mg/L. The concentration of TSS in all locations does not exceed the quality standard set by the Government of Indonesia Regulation No. 22 of 2021 concerning the Implementation of Environmental Protection and Management for Water Class II. The pH test results are more stable and are in a narrow range of 6.82-8.86 pH because it is influenced by the buffer capacity, namely the presence of river flow sedimentation. The test results for the levels of metals: copper (CU), Lead (Pb), Cadmium (Cd) and Zinc (Zn) in the Alas Singkil Watershed (DAS) showed that they were still within the threshold with the Laboratory test results below the quality standard, namely 0, 0008 b , 0.0001 b , 0.0004 b and 0.0001 b (Not detected because it is below the Minimum Detection Limit for Test Equipment).Keywords: Surface water, watershed, quality, river water pollution, monitoring and control.
Karakterisasi Biosorben Magnetik Ampas Kopi untuk Penyisihan Ion Timbal (Pb) Irza, Tsaqif Aufa; Khadafi, Muammar; Suhendrayatna, Suhendrayatna; Syaubari, Syaubari
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5083

Abstract

Industrial waste often contains heavy metals which are dangerous for human health and the environment, so effective and environmentally friendly waste processing is very necessary. This research aims to optimize the use of synthetic magnetic bioadsorbent from coffee grounds to remove the heavy metal lead (Pb) from industrial waste. Magnetic bioadsorbent was synthesized from coffee grounds by carbonizing the coffee grounds at a temperature of 600℃ for 3 hours and activated using 100 mL of 1 M HCl. The adsorption time and adsorbate concentration were tested at values of 30, 60, and 90, as well as 0.661, 1.494, 2.29, and 3 (mg/L) adsorbate, and adsorption temperatures of 30 ℃, 40 ℃, and 50 ℃. Meanwhile, carbonization temperature, coffee grounds weight, and activator concentration were used as fixed variables. In this research, the independent variables are adsorption time, adsorbate concentration, and adsorption temperature. while the fixed variables are carbonization temperature, coffee grounds weight, and activator concentration. The results of this research show that it was successful in linking the magnetite compound to the adsorbent and it can be seen from the results of FTIR analysis that there are FeO groups at a wave of 560 cm-1 and in the XRD characterization test, Fe groups are found at a wave of 35o, and based on the characterization using SEM there is a change in area surface before and after synthesis due to the presence of magnetite particles that stick to the surface, causing the pores to become smaller.
Urban Air Quality Classification Using Machine Learning Approach to Enhance Environmental Monitoring Idroes, Ghazi Mauer; Noviandy, Teuku Rizky; Maulana, Aga; Zahriah, Zahriah; Suhendrayatna, Suhendrayatna; Suhartono, Eko; Khairan, Khairan; Kusumo, Fitranto; Helwani, Zuchra; Abd Rahman, Sunarti
Leuser Journal of Environmental Studies Vol. 1 No. 2 (2023): November 2023
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v1i2.99

Abstract

Urban areas worldwide grapple with environmental challenges, notably air pollution. DKI Jakarta, Indonesia's capital city, is emblematic of this struggle, where rapid urbanization contributes to increased pollutants. This study employed the CatBoost machine learning algorithm, known for its resistance to overfitting and capability to handle missing data, to predict urban air quality based on pollutant levels from 2010 to 2021. The dataset, sourced from Jakarta's air quality monitoring stations, includes pollutants such as PM10, SO2, CO, O3, and NO2. After preprocessing, we used 80% of the data for training and 20% for testing. The model displayed high accuracy (0.9781), precision (0.9722), and recall (0.9728). The feature importance chart revealed O3 (Ozone) as the top influencer of air quality predictions, followed by PM10. Our findings highlight the dominant pollutants affecting urban air quality in Jakarta, Indonesia and emphasizing the need for targeted strategies to reduce their concentrations and ensure a cleaner and healthier urban environment.
Ensuring Accuracy: Critical Validation Techniques in Geochemical Analysis for Sustainable Geothermal Energy Development Idroes, Ghazi Mauer; Suhendrayatna, Suhendrayatna; Khairan, Khairan; Suhartono, Eko; Prasetio, Rasi; Riza, Medyan
Leuser Journal of Environmental Studies Vol. 2 No. 1 (2024): April 2024
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v2i1.176

Abstract

Geochemical analysis is a critical tool in geothermal exploration, providing valuable insights into reservoir characteristics. However, obtaining accurate and reliable geochemical data requires rigorous validation techniques. This review examines key factors affecting the accuracy of geochemical data and discusses best practices for ensuring quality. Proper sampling methods, including selection of representative locations, use of appropriate equipment, and adherence to robust protocols for sample collection, filtration, preservation, and storage, are essential for maintaining integrity. Analytical techniques must be carefully selected, with regular calibration and standardization of instruments using certified reference materials. Implementing comprehensive quality assurance and quality control procedures, such as analyzing blanks, duplicates, and spike samples, helps monitor precision and accuracy. Data interpretation should consider the complexities of the geological and hydrological settings, integrating multiple lines of evidence. By following established guidelines and continuously updating methods based on emerging technologies and inter-laboratory comparisons, geothermal teams can optimize the reliability of their geochemical data. Accurate and precise geochemical information, when combined with geological, geophysical, and hydrological data, enables informed decision-making and enhances the success of geothermal projects. As geothermal energy gains importance in the transition to sustainable resources, ensuring the accuracy of geochemical analysis will be crucial for effective exploration and development.
Karakterisasi Performa Adsorben Cangkang Telur Pada Proses Penyerapan Logam Merkuri (Hg) Miftahurrahmah, Miftahurrahmah; Ellysa, Ellysa; Suhendrayatna, Suhendrayatna
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 1 (2024): Published in June 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i1.125

Abstract

Mercury (Hg) is a highly toxic heavy metal with no biological benefits, posing significant environmental and health risks upon exposure. This study investigates the adsorption characteristics of chicken eggshell-derived adsorbents for the removal of Hg from aqueous solutions. The adsorbent preparation involved washing, drying, calcination, and KOH activation. Results indicated that the 170-mesh size adsorbent exhibited the highest adsorption efficiency, achieving a 99.70% removal rate of Hg. adsorption capacity tests revealed values ranging from 79,90 to 88,90 mg/g, conforming to the Indonesian National Standard (SNI) for activated carbon. Functional group analysis using Fourier-Transform Infrared Spectroscopy (FT-IR) identified a significant increase in aldehyde and ketone groups post-activation. The adsorption process reached equilibrium within 90 minutes, with optimal removal efficiency observed at an initial Hg concentration of 3,0 mg/L. These findings suggest that chicken eggshell-based adsorbents are a cost-effective and efficient solution for mitigating Hg contamination in wastewater, offering a sustainable alternative to conventional methods.
Morphometric Analysis and Growth Patterns of Blood Cockle (Tegillarca granosa) in Langsa Mangrove Ecosystems, Indonesia Mawardi, Mawardi; Sarong, M. Ali; Suhendrayatna, Suhendrayatna; Irham, Muhammad
Grimsa Journal of Science Engineering and Technology Vol. 2 No. 2 (2024): October 2024
Publisher : Graha Primera Saintifika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61975/gjset.v2i2.55

Abstract

The mangrove area is a nutrient-rich zone that serves as a food source for various aquatic organisms and as a spawning and nursery ground for species such as fish, crabs, and clams. The aim of this study is to investigate the morphometrics and growth pattern of blood cockle (Tegillarca granosa) in the mangrove area of Langsa City. Data collection for T. granosa was conducted using purposive sampling at three designated research locations with varying environmental conditions. Transects were established from the shoreline towards the mangrove vegetation at each research location. Within each transect, 1 meter x 1 meter plots were established for T. granosa sampling. The blood cockles found at the research sites were measured for shell length, shell width, and total weight. The research collected 98 individuals of T. granosa at the study location, with morphological variations including length, width, total weight, and sex. The size of the blood cockles ranged from 3 cm to 6.76 cm, the shell width ranged from T. granosa 2.50 cm to 5.52 cm, while the total weight of T. granosa ranged from 12 grams to 122 grams. Based on morphometric analysis, the growth pattern of T. granosa in the mangrove area of Langsa City is characterized by b = 2.5085, falling into the negative allometric category. This growth pattern indicates that the length of T. granosa grows faster compared to its total weight. Location 1 (Lhok Banie) showed the best growth pattern for T. granosa, the least favorable growth was found at Location 3 (Kuala Langsa). In conclusion, the morphometrics of T. granosa at the study site showed significant variation in length, width, and total weight. Morphometric analysis indicates that T. granosa exhibits a negative allometric growth pattern.
Adsorption of Phosphate from Aqueous Solution by Calcination of Silicified Coal: Kinetic and Isotherm Studies Fandana, Lisa; Abdullah, Faisal; Muslim*, Abrar; Suhendrayatna, Suhendrayatna; Meilina, Hesti
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.31967

Abstract

Silicified coal (SC) consisting of SiO2 is a promising raw material for adsorbent. The present study aimed to utilize silicified coal bottom ash (SCBA) adsorbent by calcination of the SC at temperatures of 600, 800, and 1000 oC for 1 hour. The FTIR result showed that the SCBA_600, SCBA_800, and SCBA_1000 had chemical functional groups such as the asymmetric Si-O-Si, the symmetric Si-O-Si and Si-O-Si bond rocking for adsorption of phosphate (PO4 3) with the lowest percentage of transmittance of SCBA-1000. The adsorption test showed that rapid adsorption occurred in the first 10 minutes of contact time, and it did not change significantly for the rest of contact time until reaching an equilibrium time of 30 min. The PO4 3 adsorption efficiency and capacity fluctuated over the initial PO4 3 in solution in the 60.02480.29 mg/L range. The highest PO4 3 adsorption efficiency and capacity were at 480.29 mg/L, 95.49 %, and 45.86 mg/g, respectively, using the SCBA-1000. The adsorption kinetic fitted better to the pseudo-second-order kinetics model (average R2 = 0.999) with the adsorption capacity of 45.454, 45.662, and 45.872 for the SCBA_600, SCBA_800, and SCBA_1000, respectively, and the PO4 3 adsorption rate was 0.0007, 0.0008 and 0.001 g/mg.min, respectively. The adsorption isotherm followed Langmuir model (average R2 = 0.873), with the adsorption capacity being 2.357, 1.198, and 8.196 mg/g, respectively, and the pore volume being 0.0316, 0.0364 and 0.2103 L/mg, respectively.
Resilience and Adaptation: Plant Ecology in Indonesia’s Geothermal Environments Idroes, Ghazi Mauer; Khairan, Khairan; Suhartono, Eko; Prasetio, Rasi; Idroes, Ghalieb Mutig; Suhendrayatna, Suhendrayatna
Leuser Journal of Environmental Studies Vol. 3 No. 1 (2025): April 2025
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v3i1.294

Abstract

Geothermal ecosystems are defined by extreme environmental conditions, such as elevated temperatures, high concentrations of toxic chemicals, and fluctuations in abiotic stressors, which shape plant survival and adaptation. These unique ecosystems, found across various geothermal regions globally, support specialized plant communities that have developed distinctive morphological, physiological, and ecological adaptations. Indonesia, located on the Pacific Ring of Fire, is one of the world’s richest geothermal nations, offering an important yet underexplored context for studying vegetation in geothermal zones. This review examines the environmental conditions of geothermal ecosystems, the adaptive strategies of vegetation, and patterns of plant diversity within Indonesian geothermal fields. It also explores ecological succession, community dynamics, and the potential use of geothermal vegetation as environmental indicators for biomonitoring. Despite growing interest, significant research gaps remain, particularly in long-term monitoring and the integration of molecular-level studies. Addressing these gaps is essential for enhancing scientific understanding and informing conservation and sustainable geothermal energy development in tropical regions. This review highlights the ecological significance of geothermal vegetation and underscores the need for interdisciplinary research to support both biodiversity preservation and responsible energy exploitation.
Biosorbent Prepared from Calotropis Gigantean Stems for Adsorption of Cu(II) Ions from Aqueous Solution Husna, Asmaul; Abdullah, Faisal; Muslim, Abrar; Suhendrayatna, Suhendrayatna; Meilina, Hesti
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 1 (2021): Jurnal Rekayasa Kimia & Lingkungan (June, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.18677

Abstract

Calotropis gigantea stems (CGS) has the potential to use as biosorbent for adsorption of Cu(II) ions. In this study, the CGS biosorbent (CGSB) was prepared by drying and grounding. The effect of independent variables on adsorption capacity were investigated. As the result, the maximum adsorption capacity of 53.457 mg/g was obtained the optimal condition which was initial Cu(II) ions concentration of 567.47 mg/L, CGSB size of less than 230 mesh, CGSB mass of 1 g, temperature of 27 oC, pH 5, and contact time of 60 min. The CGSB surface morphology was analysed using SEM. The adsorption of Cu(II) ions fitted well with pseudo first-order adsorption kinetic (PFO-AK) model (R2=0.99), and the PFO-AK adsorption capacity and rate constant obtained were 70.194 mg/g and 0.0877 g/mg.min, respectively. The adsorption isotherm of Cu(II) ions was in accordance with Freundlich model (R2=0.99), and the intensity and volume constants attained were 0.876 and 1.017 L/mg, respectively. This result showed that physical adsorption occurred dominantly than chemical adsorption. The application of CGSB on the wastewater of initial Cu(II) ions concentration of 389.31 mg/L from ex-mine pool of acid mine drainage (AMD) in Jantang village, Lhoong District, Aceh Besar, Aceh Province resulted in adsorption capacity of 37.52 mg/g with adsorption efficiency of 66.13%.
Co-Authors . Bahagia . Elvitriana . Marwan A.A. Ketut Agung Cahyawan W Abd Rahman, Sunarti Abdul Gani ABDUL GANI Abdurahman Abdurrahman Abrar Muslim Abrar Muslim Abrar Muslim Ade T Afifuddin, Muhammad Al Harist, Al Harist Ali Sarong Aman Yaman Asmaul Husna Asmaul Husna Aulia, Muhammad Bahagia Bahagia Bahagia Bahagia Bahagia Bahagia Darusman Darusman Dedi Sofriadi Donny Avrilan Edi Munawar Edi Munawar Eko Suhartono Eldina Fatimah Ellysa Ellysa Elviani Elviani Erika L Faisal Abdullah Faisal Abdullah Fandana, Lisa Febriani Febriani Fredinan Yulianda Ghazi Mauer Idroes H Murni Halik Halimah Halimah Henny Marlina Heri Afriadi Aka Hesti Meilina Hesti Meilina Hesti Meilina Husni Husni Ichwana Ichwana Idroes, Ghalieb Mutig Indra Indra Iqbalul Hadi Irhamni Irhamni Irma Yurni Irza, Tsaqif Aufa Jayawarsa, A.A. Ketut Kasturi Kasturi Khairan Khairan Kiman Siregar* Kusumo, Fitranto L, Erika Laksono Trisnantoro M. Nasir Mahidin Mahidin Marwan Abu Bakar Marwan Marwan Marwan Marwan Maulana, Aga Medyan Riza Miftahurrahmah Miftahurrahmah, Miftahurrahmah Monita Olivia Muammar Khadafi Muhammad Afifuddin Muhammad Ikhsan Sulaiman Muhammad Irham Muhammad Syukri Muhammad Zaki Muhammad Zaki Muhammad Zaki Muhammad Zaki, Muhammad Zaki Mulyadi Mulyadi Muslim*, Abrar Nizariah, Nizariah Novia Novia Novia Novia Nurlaili Nurlaili Pardede Pardede Pardede, Pardede Prasetio, Rasi Putri Nurmala Rahmawati, Sri Rini Ermiana* Rini Safitri Rini Safitri RITA ANDINI Rita Andini Sabrina Hayatun Nufus Saiful Saiful Sofia Sofia Sri Adelila Sari Sugianto Sulastri Sulastri Syafrizal Syafrizal Syaiful Huzni Syaubari Syaubari T, Ade Teuku Rizky Noviandy Thaharah Ramadhani Vera Viena Wilda Khairuna Yundari, Yundari Zahriah, Zahriah Zainal Abidin Muchlisin Ziana Ziana Zuchra Helwani, Zuchra Zuhri, Sarika Zulkifli AK Zulkifli Ak