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All Journal Sinergitas Multidisiplin Ilmu Pengetahuan dan Teknologi (SMIPT) Cassowary
Rantang, Cornelia Kesia
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science

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Karakterisasi Viskositas Dan Kadar Air Bioadhesive Berbasis Pati Jagung Termodifikasi Asam Sitrat Untuk Pembuatan Papan Partikel Useng, Mardayanti Rari; Rantang, Cornelia Kesia; Sarungallo, Rosalia Sira; Djonny, Maxie
Prosiding Seminar Nasional Sinergitas Multidisiplin Ilmu Pengetahuan dan Teknologi Vol 6 (2023): Prosiding Seminar Nasional Sinergitas Multidisiplin Ilmu Pengetahuan dan Teknologi Joi
Publisher : Yayasan Pendidikan dan Research Indonesia (YAPRI)

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Abstract

Abstrak Pati merupakan substrat yang ideal sebagai perekat untuk pembuatan komposit berbahan dasar kayu karena merupakan bahan yang murah, mudah diperoleh dan diproses, serta mengandung ikatan glikosidik reaktif dan gugus hidroksil. Tujuan dari penelitian ini adalah karakterisasi bioadhesive dari pati jagung dan asam sitrat, meliputi viskositas, dan kadar air. Metode yang digunakan dalam penelitian ini meliputi persiapan bahan baku, pembuatan perekat, dan karakterisasi perekat. Hasil penelitian pada perekat menunjukkan bahwa karakterisasi perekat pada pengujian viskositas belum memenuhi standar SNI 06-4565-1998 sebagai perekat untuk papan partikel, sementara kadar air penambahan asam sitrat pada perekat mempengaruhi kadar air, dengan kadar air yang berbeda pada setiap penambahan asam sitrat. Abstract Starch possesses desirable attributes such as cost-effectiveness, availability, ease of processing, and the presence of reactive glycosidic bonds and hydroxyl groups, making it an excellent substrate for wood-based composite adhesives. This research aimed to assess the bioadhesive properties of corn starch and citric acid, specifically focusing on viscosity and moisture content. The methodology encompassed the preparation of raw materials, formulation of the adhesive, and characterization of the adhesive. The findings of the adhesive analysis revealed that the viscosity measurements did not meet the requirements outlined in SNI 06-4565-1998 for adhesives used in wood particle boards. Moreover, the moisture content of the adhesive was influenced by the incorporation of citric acid, leading to varying moisture levels with each citric acid addition.
Optimasi flotasi bijih nikel laterit menggunakan depresan pati singkong karet (Manihot glaziovii) dengan variasi konsentrasi pati dan pH terhadap recovery nikel Rantang, Cornelia Kesia; Almi Lestari, Mirna; Yoretno Y, Putri; Caludia Rony, Putri; Imanuel Tikupadang, Ruberto; Sira Sarungallo, Rosalia
Cassowary Vol 8 No 4 (2025): Oktober
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v8.i4.503

Abstract

ABSTRACT: This research aims to characterize the chemical composition of laterite nickel ore and analyze the effect of variations in the mass of cassava rubber starch depressant (Manihot glaziovii) and the pH of the flotation solution on nickel recovery and the content of gangue minerals (Fe2O3 and SiO2) in the flotation process. The laterite nickel ore used was obtained from Southeast Sulawesi. The research was conducted experimentally in the laboratory with pH variations of 5, 7, and 9 and starch depressant masses of 0, 0.1, 0.3, and 0.5 g. The collector used was sodium oleate, and pine oil was used as a frother. The results showed that the laterite nickel ore used as raw material has typical characteristics of laterite ore with a low Ni content and high gangue content. Variations in the mass of cassava rubber starch depressant and pH affected nickel recovery and the selectivity of separation toward gangue minerals. Under acidic conditions (pH 5), increasing the starch mass up to 0.3 g decreased nickel recovery from 58.26% to 36.75%. At neutral pH (pH 7), a recovery of 69.62% was obtained, while at basic pH (pH 9) and a starch mass of 0.5 g, the highest nickel recovery of 76.61% was achieved. However, the use of cassava rubber starch has not yet shown optimal selectivity in reducing Fe2O3 and SiO2 contents. Research using cassava rubber starch has potential as a natural, economical, and environmentally friendly depressant to improve nickel recovery in the flotation process of laterite nickel ore, although further optimization is still needed to improve selectivity toward gangue minerals.
Co-Authors Almi Lestari, Mirna Caludia Rony, Putri Djonny, Maxie Imanuel Tikupadang, Ruberto Sarungallo, Rosalia Sira Sira Sarungallo, Rosalia Useng, Mardayanti Rari Yoretno Y, Putri