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All Journal Indonesian Journal of Chemical Science Competitive Jurnal Akuntansi dan Keuangan
Astuti, Indri Puji
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Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance

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Leaching Time and Nitric Acid Concentration Effect on the Separation of Lanthanum and Neodymium Elements from Neodymium Concentrates Astuti, Indri Puji; Mahatmanti, F. Widhi; Setyadji, Moch.; Sudibyo, Raden
Indonesian Journal of Chemical Science Vol 10 No 1 (2021)
Publisher : Universitas Negeri Semarang

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Abstract

The process of separating the elements of lanthanum (La) and neodymium (Nd) from neodymium concentrate (Nd(OH)3) by calcination and leaching processes to determine the effect of leaching time and HNO3 concentration. The separation process begins with calcination of the Nd(OH)3 concentrate, which functions to decompose the neodymium oxide concentrate into neodymium oxide concentrate. The process was continued with leaching with variations in leaching time (5, 10, 15 and 20 minutes) using 1 M HNO3. The results of the separation of La and Nd with the optimum time were used for leaching with variations in the concentration of HNO3 (0.5, 1, 1.5 and 2 M). During the leaching process the factor that was kept constant was the ratio of sample solids to 1: 5 HNO3 solution, using room temperature and a stirring speed of 150 rpm. The La and Nd elements separated the best at a leaching time of 10 minutes and a concentration of 1 M HNO3 with the magnitude of the leaching efficiency was 63.140% and 56.238%.
Leaching Time and Nitric Acid Concentration Effect on the Separation of Lanthanum and Neodymium Elements from Neodymium Concentrates Astuti, Indri Puji; Mahatmanti, F. Widhi; Setyadji, Moch.; Sudibyo, Raden
Indonesian Journal of Chemical Science Vol 10 No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The process of separating the elements of lanthanum (La) and neodymium (Nd) from neodymium concentrate (Nd(OH)3) by calcination and leaching processes to determine the effect of leaching time and HNO3 concentration. The separation process begins with calcination of the Nd(OH)3 concentrate, which functions to decompose the neodymium oxide concentrate into neodymium oxide concentrate. The process was continued with leaching with variations in leaching time (5, 10, 15 and 20 minutes) using 1 M HNO3. The results of the separation of La and Nd with the optimum time were used for leaching with variations in the concentration of HNO3 (0.5, 1, 1.5 and 2 M). During the leaching process the factor that was kept constant was the ratio of sample solids to 1: 5 HNO3 solution, using room temperature and a stirring speed of 150 rpm. The La and Nd elements separated the best at a leaching time of 10 minutes and a concentration of 1 M HNO3 with the magnitude of the leaching efficiency was 63.140% and 56.238%.
PERAN KEBIJAKAN DIVIDEN MEMEDIASI LEVERAGE DAN EARNING PER SHARE TERHADAP RETURN SAHAM Astuti, Indri Puji; Faizah, Erna Nur; Lailiyah, Elliv Hidayatul
COMPETITIVE Vol 8, No 1 (2024): Competitive Jurnal Akuntansi dan Keuangan
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/competitive.v8i1.11979

Abstract

This study aims to determine the dividend policy mediates leverage and earnings per share on stock returns in the LQ-45 Index Company for the 2016-2022 Period. This type of research is quantitative research using secondary data. The population in this study were LQ-45 Index Companies for the 2016-2022 Period. The sampling technique used purposive sampling so that 12 companies were obtained as samples. This study uses path analysis and sobel test with tools in the form of SPSS (Statistical Package for Social Science) computer software. The results of this study indicate that leverage has a negative effect on dividend policy, earning per share has no effect on dividend policy, leverage and earning per share have no effect on stock returns, dividend policy has no effect on stock returns, while dividend policy does not mediate leverage and earning per share on stock returns.
Co-Authors Elliv Hidayatul Lailiyah F Widhi Mahatmanti Faizah, Erna Nur Moch. Setyadji Sudibyo, Raden