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All Journal Indonesian Journal of Geography Jurnal Pengajaran MIPA Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Jurnal technoscientia JURNAL PIJAR Teknosains: Media Informasi Sains dan Teknologi Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Prosiding Pendidikan Sains Jurnal Zeolit Indonesia CHEMPUBLISH JOURNAL IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Indonesian Journal of Chemistry Jurnal Mineral, Energi dan Lingkungan Chemistry Indonesian Journal of Chemical Research Jurnal Jejaring Matematika dan Sains Molluca Journal of Chemistry Education (MJoCE) Jurnal Mineral, Energi dan Lingkungan JURNAL TEKNOLOGI TECHNOSCIENTIA International Journal of Renewable Energy Development
Sri Juari Santosa
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics

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Journal : Jurnal Bahan Alam Terbarukan

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Application of Humic Acid Isolated From Kalimatan Peat Soil Modifying Magnetite for Recovery of Gold Rahmayanti, Maya; Abdillah, Guliston; Santosa, Sri Juari; Sutarno, Sutarno
Jurnal Bahan Alam Terbarukan Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v8i2.20392

Abstract

Humic acid modifying magnetite particles (Mag-HA) were developed for recovery of gold from chloride solution (HAuCl4). The Mag-HA particles were prepared by co-precipitation procedure with Fe(III) and Fe(II) chloride salts, sodium hydroxide, and humic acid. FTIR characterization for Mag-HA after modification indicated the presence of the specific absorption for functional groups of humic acid and Fe-O bonds, though with lower intensity. The Mag-HA particles exhibited a typical superparamagnetic characteristic with a saturation magnetization of 66.99 emu/g. The Mag-HA particles were applied for AuCl4- adsorption and results showed that the optimum adsorption of [AuCl4]- onto Mag-HA was found at pH 3. The adsorption kinetics can be described by a pseudo-second order equation and the adsorption isotherm of the Mag-HA particles agreed well with Langmuir adsorption equation. The maximum adsorbed amount of [AuCl4]- was 0.62 mmol/g and the XRD analysis confirms that the adsorption of Au(III) by Mag-HA was accompanied by the formation of elemental gold.
Modified Humic Acid from Peat Soils with Magnetite (Ha-Fe3O4) by Using Sonochemical Technology for Gold Recovery Rahmayanti, Maya; Santosa, Sri Juari; Sutarno, Sutarno
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.26131

Abstract

Sonochemical technology is a technology that involves ultrasonic waves in chemical reactions. In this study, humic acid isolated from peat soil has been successfully modified with magnetite (HA-Fe3O4) using sonochemical technology. Characterization of the physical and chemical properties of HA-Fe3O4 was carried out using FTIR, XRD, SEM and VSM. HA-Fe3O4 was used for recovery of gold from simulated gold waste (HAuCl4). FTIR characterization showed that the interaction between HA and Fe3O4 was through hydrogen bonds. The crystal size of HA-Fe3O4 using the Debye-Scherrer equation based on the XRD diffractogram was 12.4 nm. The saturation magnetization value of HA-Fe3O4 obtained was 52.80 emu/g. Adsorption studies at various pH showed that HA-Fe3O4 has been successful in recovering of gold from simulated gold waste. The % recovery of gold was 99%. Gold recovery occurs through the adsorption process followed by reduction of Au (III) to Au(0).
Co-Authors - Jumaeri Abdillah, Guliston Agung Abadi Kiswandono Ahmad Nasir Pulungan Akhmad Syoufian Andung Bayu Sekaranom Bambang Rusdiarso Christina Tefa, Yoan Nikita Dewi Agustiningsih, Dewi Dian Hudawan Santoso Dwi Siswanta Dwi Siswanta Eddy Heraldy Eko Sri Kunarti Fitri Khoerunnisa Girsang, Ermi Hasnowo, Lutfi Aditya Hatmanto, Adhi Dwi Herdiansyah Herdiansyah Hilmi Hamidi Indriana Kartini Jumina Jumina Juniva Laila Sihombing, Juniva Laila Karna Wijaya Kustomo, Kustomo La Harimu Lingga Binagara Maya Rahmayanti Mudasir Mudasir Mustofa Mustofa Nurul Hidayat Aprilita Nurul Ismillayli Nuryono Nuryono Pambudi, Fajar Inggit Paweni, Astuti Pusaka, Semerdanta Puspitaningrum, Indah Rahmat Basuki Rahmayanti, Maya Sabirin Matsjeh Santoso, M.Sc, Dian Hudawan Sehol, Muhamad Sri Sunarsih Susy Yunita Prabawati Sutarno Sutarno Sutarno Sutarno Takashi Hayashita Uripto Trisno Santoso