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All Journal Eksergi: Chemical Engineering Journal Indonesia Chimica Acta JMM (Jurnal Masyarakat Mandiri) Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya COVIT Jutek JAGO Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences KOLONI Jurnal Pengabdian Masyarakat dan Riset Pendidikan Hayyan Journal
Yunus, Muhammad Arham
Politeknik Negeri Ujung Pandang
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Studi Kandungan Hara Organik dan Anorganik pada Pupuk Organik Berbasis Fermentasi Bakteri dan Biokonversi oleh Cacing Tanah (Vermikompos) Nurfiansyah, Nurfiansyah; Muhammad Anshar; Ahmad Nurul Muttaqin; Ahmad Zubair Sultan; Mahirullah Mahirullah; Muhammad Arham Yunus
Venn: Journal of Sustainable Innovation on Education, Mathematics and Natural Sciences Vol. 5 No. 2 (2026): Biology, Physics, Chemistry, and other Basic Sciences
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/venn.v5i2.429

Abstract

The increasing accumulation of household organic waste, particularly leaf waste, poses environmental challenges due to limited optimal management and low added value utilization. Leaf waste have potential to be converted into organic fertilizer; however, natural decomposition is slow and often produces compost with inconsistent chemical quality. This study aims to evaluate the organic and inorganic compound content of solid organic fertilizer produced through an integrated approach combining mechanical shredding, bacterial fermentation, and vermicomposting. The research method involved shredding leaf waste using a rotary cutter shredder, followed by bacterial fermentation using activated effective microorganism and subsequent vermicomposting employing Pheretima posthuma. Compost quality was assessed based on physical parameters (temperature, odor, and color) and chemical parameters in accordance with SNI 19-7030-2004. The results showed that the compost reached a relatively mature condition, indicated by stable temperature, earthy odor, and dark brown color at the end of the process. Most chemical parameters met the SNI requirements, particularly phosphorus (P₂O₅) and potassium (K₂O), while heavy metal contents such as Pb and As were not detected and other metals remained well below permissible limits, suggesting the role of earthworm activity in reducing metal bioavailability. However, C-organic content and C/N ratio were slightly below and above the standard range, respectively. Overall, the integrated fermentation–vermicomposting approach demonstrates strong potential as sustainable technology for converting leaf waste into environmentally friendly organic fertilizer. However, further process optimization is required to improve the chemical quality of the product and to enhance the worm separation system for more efficient processing.
Extraction of Carrageenan from Seaweed Eucheuma cottonii Using Sonication Method Yunus, Muhammad Arham; Alya Patrisya, A. Miftah; Nur Artanti, Athiyah; Pagayang, Indriantika; Aswa, Nur Ainun; Maulana Aras, Fiqry
Hayyan Journal Vol. 2 No. 2 (2025): June
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v2i2.4834

Abstract

This study aimed to extract carrageenan from the red seaweed Eucheuma cottonii using potassium hydroxide (KOH) as solvent with the sonication method. Extraction was performed at 80°C for 60 minutes with a seaweed-to-solvent ratio of 1:30 (w/v) at an ultrasonic frequency of 40 kHz. The optimized extraction conditions yielded a carrageenan yield of 21.08%. Quality parameters evaluated included moisture content, ash content, viscosity, and gel strength. Moisture content (0.07%), ash content (0.37%), and viscosity (34.2 cP) all met FCC and FAO standards. However, the gel strength of 14.361 g/cm² did not meet the commercial standard.
Pengaruh Suhu dan Ion Logam Terhadap Potensi Senyawa Kompleks Ditiokarbamat Sebagai Zat Aditif Pada Pelumas Dian Ranggina; Zakiyah Darajat; Muhammad Arham Yunus; Nurfiansyah Nurfiansyah
KOLONI Vol. 1 No. 4 (2022): DESEMBER 2022
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/koloni.v1i4.94

Abstract

The ideal quality of lubricant can be obtained by adding additives. One of the functions of additives in lubricants is to maintain viscosity against temperature changes. Dithiocarbamate complexes with heavy metals have very low solubility in water so that dithiocarbamate compounds have great potential as additives in lubricants. This research was conducted in an effort to determine the effect of temperature (40 oC and 100 oC) on the viscosity of the lubricant and metal ions (Mn2+, Fe3+, Co2+) in the synthesis of dithiocarbamate complex compounds on their potential as additives in lubricants. This compound was synthesized by in situ method and to measure and compare the viscosity of the lubricant before and after the addition of the complex compound as an additive.The results showed that complex compounds from N-ethylisopropylditiocarbamate ligands could be synthesized with metal ions Mn(II), Fe(III) and Co(II). Where is the synthesis of complex compounds obtained yields Mn(II)-N-ethylisopropylditiocarbamate amounted to 49.59%, Fe(III)-N-Ethylisopropyldithiocarbamate of 41.81%,and Co(II)-N-Etilisopropil ditiocarbamate by64.12%.From the results of the characterization of the viscosity test, it can be seen that temperature and metal ions in complex compounds affect their potential effectiveness as additives in lubricants. Of the three complex compounds it is more effective at 100 oC than 40 oC, where metal ions Mn (II) are more effective than Fe(III) and Co (II). Keywords: Lubricants, additives, metal ions, temperature, dithiocarbamate.
Co-Authors . Sulfikar A Mufhida Rezky Amalia Azzahra Hayat Afrianti S, Lamuru Afriyanti S. Lamuru Ahmad Nurul Muttaqin Ahmad Zubair Sultan Alya Patrisya, A. Miftah Anggun Pratiwi Ansar, Nur Iklil Aflah Aswa, Nur Ainun Dian Ranggina Fadhil Dwi Syahputra Gunarya Muhammad Rachman Harun Pampang Hasan, Fausiah Hayat, A Mufidha Rezky Amalia Azzahra Indah , Raya Indah, Raya irma yunita Lestari, Sry Ayu M. Nur Fahresya Ananda S Madina, Nur Mahirullah Mahirullah Maria Assumpta Nogo Ole Maulana Aras, Fiqry Mimin , Septiani Mufli, Muh Fadil Muh Fadil Mufli Muhammad Anshar Nawir, Yuyun Natasya Nur Artanti, Athiyah Nurfiansyah Nurfiansyah Nurfiansyah Nurfiansyah, Nurfiansyah Pagayang, Indriantika Rachman, Gunarya Muhammad Sahira, Fadhia Zahra Septiani, Mimin Suci Rahmadani Syahputra, Fadhil Dwi Zakiyah Darajat Zakiyah Darajat Zuhrotul Fikri Ilma