Article Per Year (5 Year)
p-Index From 2021 - 2026
5.119
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Jurnal SOLMA Pendas : Jurnah Ilmiah Pendidikan Dasar JMM (Jurnal Masyarakat Mandiri) JURNAL PENDIDIKAN TAMBUSAI Agritechnology : Jurnal Teknologi Pertanian Patria : Jurnal Pengabdian Kepada Masyarakat Jurnal Riset Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti (JAICB) Mattawang: Jurnal Pengabdian Masyarakat Journal of Education Research Jurnal Akademika Kimia Jurnal Ilmu Pendidikan Indonesia Jurnal Akademika Kimia Jurnal Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti
Mery Napitupulu
Pendidikan Kimia FKIP Universitas Tadulako Palu Indonesi 94119
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

Published : 66 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 66 Documents
Search

 3   4   5   6   7 
Preparation of Biochar from Mango Seed Shell as a Chromium Ion Adsorbent Mery Napitupulu; Ayla Cakrawala; Daud K. Walanda; Tri Santoso
Jurnal Akademika Kimia Vol. 13 No. 2 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i2.pp57-62

Abstract

The study aims to utilize waste from manga fruit, especially seed shells, as raw material for chromium metal adsorbents in water. Utilizing this waste is one way to support the principle of zero waste for agricultural and plantation products. The biochar preparation process is carried out by pyrolysis, namely, burning in the absence of oxygen. To determine the adsorption capacity of biochar from mango seed shells for chromium ions, analysis was carried out by varying the biochar weight and chromium concentration. The results showed that at carbonisation temperatures of 350 oC, 400 oC, and 450 oC, the water content was 7.5 %, 6.4 %, and 6.2 %, respectively, while the ash content was 6.3 %, 5.9 %, and 5 %, respectively. 6 % respectively. The optimum biochar weight was determined using 20 mg, 40 mg, 60 mg, 80 mg, and 100 mg of biochar. In contrast, the optimum concentration was determined using biochar concentrations of 20 ppm, 40 ppm, 60 ppm, 80 ppm, and 100 ppm. The research results showed that the optimal weight of mango seed shell biochar at a biochar temperature of 450 °C was 100 mg, with a chromium absorption percentage of 92.96%. Meanwhile, the optimum concentration is 20 ppm across all biochars, with chromium absorption of 92.05% for the 450 °C biochar. Manga seed shells have economic value and environmental remediation applications, as they can be converted into adsorbents for chromium metal.
Nickel Extraction from Morowali Laterite Ore with Combination of Sulfuric Acid (H2SO4) and Nitric Acid (HNO3) Mujahida Mustari; Daud K. Walanda; Mery Napitupulu; Sri H. V. Pulukadang
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp113-117

Abstract

Nickel is a very important metal. The nickel reserves in Indonesia are very large, but there is no dedicated process that uses only nickel ore as a raw material. The process of separating nickel from impurities is carried out by leaching with a sulfuric acid-nitric acid solution. The research design was developed using the Taguchi Larger-the-Better method to optimize nickel extraction. In the leaching stage, nickel is extracted from the ore by dissolving it in an acid medium. The variables examined in this study were the mixture ratio, temperature, and leaching time. The extracted filtrate was analyzed using Atomic Absorption Spectrophotometry (AAS). The results of the Taguchi analysis showed that the optimal conditions for the leaching process were obtained with a mixture ratio of 2:1, a temperature of 60 °C, and a leaching time of 12 hours, yielding a concentration of 10.559 ppm and a recovery of 2.49%.
The Extraction of Nickel from Morowali Laterite Ore with Sulfuric Acid (H2SO4) Yuliani Yuliani; Daud K. Walanda; Mery Napitupulu; Sri H. V. Pulukadang; Detris Poba
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp102-107

Abstract

Efficient recovery of valuable minerals from waste materials requires optimizing key processing parameters to maximize extraction efficiency and resource utilization. This research was conducted to determine the optimal extraction conditions, which were influenced by sulfuric acid concentration, temperature, and leaching time. This study used the Taguchi method with 3 factors and 3 levels: the concentration of sulfuric acid (H2SO4) at 0.5 M, 1 M, and 2 M; temperatures at 30 °C, 60 °C, and 95 °C; and leaching times of 3 hours, 6 hours, and 12 hours. The optimum conditions obtained from the study were a temperature of 95 °C, a leaching time of 6 hours, and an acid concentration of 2 M, with an absorbance of 0.6820. These results indicate that the Taguchi method is an efficient and reliable approach for optimizing leaching parameters, thereby contributing to the development of sustainable mineral recovery from waste materials.  
Comparison of Maceration and Soxhlet Extraction Methods on Flavonoid Contents from Papaya (Carica papaya) Windi Anggraini; Mery Napitupulu; Daud K. Walanda; Detris Poba
Jurnal Akademika Kimia Vol. 14 No. 2 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i2.pp112-117

Abstract

The papaya plant offers numerous benefits. Each part of the papaya plant has its benefits, starting from the fruit, stem, roots, flowers, and leaves. Livestock Medicine confirmed the presence of at least 22 types of bioactive compounds. The papaya plant contains active compounds that act as antioxidants, including flavonoids. This research aims to compare maceration and Soxhlet extraction methods on the flavonoid content of papaya (Carica papaya) leaf extract as measured using a UV-Vis spectrophotometer. The methods used to separate flavonoid levels are maceration and Soxhlet extraction. Based on the research that has been carried out, it was found that two treatments were carried out in the maceration method: the first treatment was with 70 % ethanol solvent, namely 36.6 mg / 100g or 3.66 %, for 96 % ethanol solvent, namely 77.6 mg / 100g or 7.76 %. Two treatments are also carried out in the Soxhlet method: 70% ethanol (33.6 mg/100g, 3.36%) and 96% ethanol (92.6 mg/100g, 9.26%). These results indicate that Soxhlet extraction is the most effective method for producing flavonoids in papaya leaf extract, as the levels obtained are higher than those obtained by maceration.
PELATIHAN MANAJEMEN REFERENSI BERBASIS MENDELEY DAN ZOTERO UNTUK MENDUKUNG PENYUSUNAN ARTIKEL ILMIAH DOSEN AKADEMI BINA FARMASI PALU Mery Napitupulu; Daud Karel Walanda; Alam Anshary; Nurasyah Dewi Napitupulu; Marungkil Pasaribu; Detris Poba; Reny Reny
Jurnal Abdimas Ilmiah Citra Bakti Vol. 7 No. 1 (2026)
Publisher : STKIP Citra Bakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38048/jailcb.v7i1.6279

Abstract

Permasalahan utama yang dihadapi dosen Akademi Bina Farmasi Palu adalah keterbatasan pemahaman dan keterampilan dalam mengelola referensi ilmiah secara sistematis menggunakan perangkat lunak manajemen referensi. Kondisi ini menyebabkan proses penulisan artikel ilmiah menjadi kurang efisien, terutama dalam pengelolaan sitasi dan penyusunan daftar pustaka sesuai standar penulisan ilmiah. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kompetensi dosen dalam memanfaatkan perangkat lunak manajemen referensi guna mendukung penyusunan artikel ilmiah yang berkualitas. Mitra kegiatan adalah dosen Akademi Bina Farmasi Palu. Kegiatan dilaksanakan dalam bentuk pelatihan dan bimbingan teknis yang dilaksanakan secara langsung melalui presentasi materi dan praktik penggunaan aplikasi manajemen referensi seperti Mendeley dan Zotero. Materi pelatihan meliputi pengenalan perangkat lunak manajemen referensi, teknik pelacakan sumber literatur dari basis data ilmiah, pengelolaan sitasi otomatis, serta integrasi perangkat lunak manajemen referensi dengan perangkat pengolah kata. Kegiatan juga dilengkapi dengan sesi pendampingan teknis untuk membantu peserta mengatasi kendala dalam penggunaan aplikasi. Hasil kegiatan menunjukkan adanya peningkatan pemahaman dan keterampilan peserta dalam mengelola pustaka digital, melakukan sitasi secara otomatis, serta menyusun daftar pustaka sesuai gaya penulisan ilmiah. Peserta juga menunjukkan kemampuan yang lebih baik dalam memanfaatkan aplikasi manajemen referensi untuk mendukung proses penulisan artikel ilmiah. Dengan demikian, kegiatan pelatihan ini berkontribusi dalam meningkatkan kualitas penulisan ilmiah dosen serta mendukung penguatan budaya publikasi akademik di Akademi Bina Farmasi Palu.
THE EFFECT OF TUMPEK WARIGA-BASED PROJECT-BASED LEARNING ON ELEMENTARY SCHOOL STUDENTS’ CRITICAL THINKING AND COLLABORATION SKILLS IN INTEGRATED SCIENCE AND SOCIAL STUDIES LEARNING Ni Gusti Ayu Putu Eka Sri Wahyuni; Marungkil Pasaribu; Paulus Abram Hengky; Kasmudin Mustapa; Mery Napitupulu
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 Nomor 02, Juni 2026 Published
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.51509

Abstract

This study aimed to examine the effect of the Tumpek Wariga-based Project-Based Learning (PjBL) model on students’ critical thinking and collaboration skills in science and social studies (IPAS) learning at SD Negeri Sumbersari. The study employed a quasi-experimental method using two research designs: a Pretest–Posttest Control Group Design for the critical thinking skills variable and a Static Group Comparison Design for the collaboration skills variable. The participants consisted of 17 students in the experimental group and 16 students in the control group. Critical thinking data were collected through a six-item essay test, while collaboration skills data were obtained through structured observations consisting of 12 indicators across five aspects. Data were analyzed using normality and homogeneity tests, paired samples t-test, Mann–Whitney U test, independent samples t-test, N-Gain analysis, and Cohen’s d effect size. The results revealed that the Tumpek Wariga-based PjBL model had a positive effect on students’ critical thinking skills, as indicated by an N-Gain score of 0.35 (moderate category) and an effect size of 0.38 (small category). The model also demonstrated a highly significant effect on collaboration skills, with the experimental group achieving an average score of 83.58% (very high category), significantly higher than that of the control group (51.56%), and an effect size of 5.402 (very large category). These findings suggest that the integration of local wisdom through the Tumpek Wariga-based PjBL model is effective in fostering elementary school students’ critical thinking and collaboration skills.
Co-Authors Afadil Agustin Tiwow Alam Anshary Almahdali, Khafifah Anang Wahid M.Diah Areeya Milehman Arini Ramadani Arwansyah Arwansyah Ayla Cakrawala Budi Rahayu, Budi Cresna, Cresna Daud Karel Walanda Delviana Melego Detris Poba Dwijogo, Wasis D Enar, Rohmala Ersa W. Lakukua Fitriani Fitriani Galib, Stefhanny Ginting, Dewi Gleryl F. Novemly Hajerina Hajerina Hesti Rebo Hutagaol, Jhon I Komang Jati Purnawan I Nengah Kundera I W. A. Wirawan Ijirana Iriani, Fitri Jamaludin M Sakung Kasmudin Mustapa Kesumasari, Ni Made Kusuma, I Gede Yoga Nata Leonardo Leonardo Lis K. Djaledje Lumbantobing, Ria M., Erni Madjid, Nurhidayah Abd. Marungkil Pasaribu Masriana Masriana, Masriana Mesakh, Eka Putra Minarni Rama Jura Minarni Rama Jura Miryam B. Kalase Muhammad Agus Muljanto MUHAMMAD ALI Mujahida Mustari Munsyir, Muh Ibnu Napitupulu, Nurasyah D Ni Gusti Ayu Putu Eka Sri Wahyuni Nur Fahmi Nurasyah Dewi Napitupulu Nurdin Rahman Nurhikma Nurhikma Nuriadi, Nuriadi Nyoman Lina Finasti Parwati, Ni Kadek Fina Paulus Abram Hengky Poba, Detris Podala, Katherina Pongenda, Rudy Christiyanto Punaji Setyosari Purnama Ningsih Ratman Ratman Ratman Ratman Ratman Reny Reny Ria Lumbantobing Rita Lefrida Robert Tolly Ryka Marina Walanda Setiawan, I Ketut Ardi Siang Tandi Gonggo Siti Fathonah Septianingsih Siti Nuryanti Sitti Rahmawati Situngkir, Risma U Solika, Nafikatus Sri H. V. Pulukadang Sri Hastuti Virgianti Pulukadang Sri Mulyani Sabang Susilawati, Niluh Eka Tahril Taslima Tiara Maharani, Tiara Tri Santoso Walanda, Richard Albert Walanda, Ryka M Walanda, Ryka M. Widi Astuti Suleman Windi Anggraini Yuli Nurmayanti Yuliani Yuliani Zarnila, Zarnila Zita L. Sarungallo