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All Journal Jurnal Teknologi Mineral dan Batubara Adi Widya : Jurnal Pengabdian Masyarakat Indonesian Mining Journal Jurnal Entomologi Indonesia Agroteknika NURSING UPDATE JURNAL ILMIAH ILMU KEPERAWATAN Griya Widya: Journal of Sexual and Reproductive Health Jurnal Teknologi Mineral dan Batubara
Retno Wijayanti
JURUSAN ADMINISTRASI PUBLIK FAKULTAS ILMU SOSIAL DAN ILMU POLITIK UNIVERSITAS DIPONEGORO SEMARANG
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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STUDI PERBANDINGAN PROSES PELINDIAN UNTUK EKSTRAKSI SKANDIUM DARI TERAK RESIDU BAUKSIT Sariman; Rochani, Siti; Saleh, Nuryadi; Rodliyah, Isyatun; Dianawati, Erika Arum; Wijayanti, Retno
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1509

Abstract

Scandium is classified as a rare earth element. Its existences are geochemically in small amounts as associate minerals. Consequently, scandium production is minimally from processing residues of major minerals. Indonesia has large bauxite deposits, and it is processed into alumina, producing bauxite residue as a by-product. The bauxite residue contains rare earth metals, including scandium. In this study, various ways of extracting scandium from bauxite residue slag were carried out. The bauxite residue beneficiation process was done through a smelting reduction process followed by magnetic separation. Scandium extractions were carried out from the bauxite residue slag through a leaching process with concentrated sulfuric, sulfation, alkali fusion, and a 2-stage acid leaching. The best percentage of scandium extracted was obtained at 88.40%, using the 2-stage acid leaching at the acid concentration of 500 g/kg, the temperature of 90oC, and the leaching time at 3 hours for each leaching stage. In addition, the best neodymium extracted achieved  76,97%, using the alkali fusion, fused in NaOH at 700oC for 3 hours.
Serangga pengunjung bunga tumbuhan liar dan potensinya untuk mendukung penyerbukan jambu mete (Anacardium occidentale L): Flower-insect visitors on wild plants and its potential to enhance pollination on cashew (Anacardium occidentale L) Supriyadi, Supriyadi; Wijayanti, Retno; Arniputri, Retna Bandriyati; Azizin, Fakhriza Nikma
Jurnal Entomologi Indonesia Vol 20 No 3 (2023): November
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.20.3.269

Abstract

Pollination is important in cashew production, thus it is important to understand the factor determining the presence of pollination in cashew habitat. The research was carried out by field surveys in cashew farms to record the insects that exhibited nectar and pollen foraging activities on wild and cashew flowers. This study recorded the similarity between flower-insect visitors on wild plants and cashews, namely families of Apidae, Halictidae, Pieridae, and Andrenidae. Apidae were the most important flower visitors, but the honey bee, Apis sp. as an important pollinator, did not show the highest abundance. Wild flowering plants in cashew fields have the potential to play a role in the conservation of cashew pollinators.
Co-Authors . Sariman AA Sudharmawan, AA Anan Sutisna Arniputri, Retna Bandriyati Azizin, Fakhriza Nikma Dianawati, Erika Arum Eka Nurmala Sari Hakim, Shiddiq Luqman Harlina Kusuma Tuti Irianti, Ruslina Isyatun Rodliyah, Isyatun Jamhari Jamhari Josua, Dian Pertiwi M. Kamilah Himawati Muchlas Suseno Nuridayanti, Nuridayanti Nuryadi Saleh, Nuryadi Putri, Retno Bandriyati Arni Rahayu, Sayekti Kurnia Rahmania, Shokhib Rukhana, Siti SARIMAN Selang, Rustam AR Shidiqi, Moh Hasbi Ash Siti Rochani, Siti Sri Wahyuni Sukowati, Umi Supriyadi Supriyadi Supriyono Supriyono