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All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Matematika & Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Jurnal SOLMA Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) JURNAL PENDIDIKAN MIPA Jurnal Ilmiah Kanderang Tingang Journal of Educational Chemistry (JEC) Patria : Jurnal Pengabdian Kepada Masyarakat Jurnal Riset Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti (JAICB) Mattawang: Jurnal Pengabdian Masyarakat Journal of Education Research JSEP (Journal of Science Education and Practice) Jurnal Akademika Kimia Jurnal Ilmu Pendidikan Indonesia JIPI (Jurnal IPA dan Pembelajaran IPA) Mitra Sains Jurnal Akademika Kimia Jurnal Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti
Daud Karel Walanda
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 Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Nickel Extraction From Morowali Laterite Ore With a Mixture of Hydrochloric Acid (HCl) and Sulfuric Acid (H2SO4) Fitriani Fitriani; Daud K. Walanda; Mery Napitupulu; Vanny M. A. Tiwow; Detris Poba
Jurnal Akademika Kimia Vol. 13 No. 3 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i3.pp72-77

Abstract

The study aims to determine the effects of temperature, leaching time, and the acid chloride-acid sulphate mixture ratio on nickel extraction and to identify the optimal extraction conditions for nickel laterite using the Taguchi method. Samples of laterite used come from the local District of Bahodopi, District of Morowali, Province of Central Sulawesi. Quantitative analysis using Atomic Absorption Spectrophotometry (AAS) with the variables under study included temperature with a condition level of 30 oC, 60 oC, and 90 oC, a leaching time of 3 hours, 6 hours, and 12 hours, and a mixture ratio of 0.5 M and H2SO4 0.5 M 1: 1, 1: 2, and 2: 1. Results of the study showed the condition of optimum is obtained which is at a temperature of 90 oC, while leaching ratio of 6 hours and mixture of acid 1: 2 with average absorbance optimum obtained are 0.736, the average concentration optimum of 8.085 ppm and the recovery value of 2.32 %.
Adsorption of Iron Ions by Biocharcoal from Areca Nut Shells and Fruit Clusters Hesti Rebo; Daud K. Walanda; Mery Napitupulu; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 13 No. 3 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i3.pp88-92

Abstract

This study aims to identify the adsorption of iron ions by biochar produced from palm nut shells and palm fruit bunches. The method used in this study was a laboratory experiment employing palm nut shell biochar and palm fruit bunch biochar as adsorbents for Fe ions. The results showed that the optimum contact time for palm nut shell biochar was 150 minutes, with an iron ion adsorption percentage of 99.87%. In contrast, for palm fruit cluster biochar, the optimum contact time was 120 minutes, with an iron ion adsorption percentage of 99.83%. The optimal adsorption of iron ions by areca nut shell biochar occurred at a dose of 20 mg, with an adsorption percentage of 99.70%. In contrast, for areca fruit bunch biochar, it occurred at a dose of 40 mg, with an adsorption percentage of 99.80%. The optimal concentration obtained for both biochar types was the same, namely 60 ppm, with an iron ion adsorption percentage of 99.5% for areca nut shells and 98.85% for areca fruit bunches. The maximum adsorption capacity of areca nut shell biochar was 121.9512 mg/g, and that of areca fruit cluster biochar was 58.1395 mg/g, calculated using the Langmuir isotherm equation. Meanwhile, the maximum adsorption capacity of palm shell biochar was 123.0915 mg/g, and that of palm fruit bunches was 62.1871 mg/g using the Freundlich isotherm equation.
Effect of Solvent Differences on Flavonoid Levels and Antioxidant Activity of Hass Avocado Peel (Persea Americana Hass) Mery Napitupulu; Nurhikma Nurhikma; Daud K. Walanda; Detris Poba
Jurnal Akademika Kimia Vol. 14 No. 1 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i1.pp51-57

Abstract

The Hass avocado fruit (Persea Americana Hass) comes from Australia. The color of the Hass avocado skin when it is still raw is green, and when it is ripe, it is black. This study aims to see the effect of different solvents in determining the levels of flavonoids and the antioxidant activity of Hass avocado peel extract. Determination of flavonoid levels using UV-Vis spectrophotometry and for antioxidant activity using 2,2-diphenyl-1-pikrihydrazyl (DPPH) as a source of free radicals, and vitamin C as a positive control, and UV-Vis spectrophotometry to measure the absorbance of Hass avocado peel extract. The results showed that the flavonoid content in the ethanol extract of avocado peel was 2.078 mg/100 mg extract, and for the methanol extract of Hass avocado peel was 1.995 mg/100 mg extract. For the antioxidant activity test, the IC50 value of the ethanol extract of avocado peel was 134.181 mg/L, while the IC50 value of vitamin C was 19.815 mg/L. For the methanol extract of Hass avocado rind, the IC50 value was 149.611 mg/L, while for vitamin C, the IC50 value was 37.093 mg/L. Ethanol extract and methanol extract of Hass avocado peel (Persea Americana hass) are classified as moderately strong antioxidants based on IC50 values.
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.
Co-Authors AA Sudharmawan, AA Afadil Agustin Tiwow Alam Anshary Alep, Boni Alizah, Nur Almahdali, Khafifah Amalia, Maryam Anang Wahid M.Diah Anggraini Anggraini Arini Ramadani Arwansyah Arwansyah Ayla Cakrawala Baharuddin Hamzah Baloga, Hendra Bau Ratu Berlin, I Dewa Gede Darsikin Darsikin Delviana Melego Detris Poba Dewi, Evie Kurnia Maya Dewijayanti, Putu W. Djahir, Ahmad Rifaldi Djulia Onggo Eka Dewi Ellak I. von Nagy-Felsobuki Emi Sulmeni Enar, Rohmala Finta Amalinda Finta Amalinda Fitriani Fitriani Fitriani, Eva Geoffrey A. Lawrance Griffiths, Zoe Hasmawati Hasmawati Hesti Rebo I Ketut Suada I Komang Jati Purnawan I Komang werdhiana I W. A. Wirawan Irwan Said Ismail Ismail Kasmudin Mustapa Kusuma, I Gede Yoga Nata Leonardo Leonardo Marungkil Pasaribu Mery Napitupulu Mery Napitupulu Mery Napitupulu Miryam B. Kalase Mohammad Jamhari Muhammad Agus Muljanto Mujahida Mustari Mustakim, Sartika Mustamin Idris Nakazawa, Koyomi Napitupulu*, Mery Napitupulu, Nurasyah D Ni Luh Cicik Fitriani Novianti Patiung Nur A. O. Buhang Nurasyah Dewi Napitupulu Nurasyah Dewi Napitupulu Nurdin Rahman Nurhikma Nurhikma Poba, Detris Podala, Katherina Pongenda, Rudy Christiyanto Purnama Ningsih Rahma, Sri Ratman Ratman Reny Reny Richard Albert Walanda Rimah Juwita Rita Lefrida Robert C. Burns Robert Tolly Rukmawati Rukmawati Ryka Marina Walanda Sarintan Nurcahyati Kaharu Setiawan, I Ketut Ardi Siang Tandi Gonggo Siang Tandi Gonggo Siti Nuryanti Sitti Aminah Sitti Rahmawati Solfarina, Solfarina Sri H. V. Pulukadang Sri Hastuti Virgianti Pulukadang Sri Mulyani Sabang Suciati, Indah Suhartini Musa Supriadi Supriadi Susilawati, Niluh Eka Syamsiar, Syamsiar Tahril Taslima Tiara Maharani, Tiara Tiwow, Vanny M A Tri Santoso Trisnawati Trisnawati Tudjuka, Mora Delfita Uswatun Hasanah Wagiman, Saumadin Walanda, Ryka M Walanda, Ryka M. Windi Anggraini Yeyet Sri Rahmi Yuli Nurmayanti Yuliani Yuliani Yulianti, Iluh Devi