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All Journal Prosiding Seminar Nasional MIPA KOVALEN: Jurnal Riset Kimia Indonesia Chimica Acta Jurnal Biologi Tropis Jurnal Ilmu Alam dan Lingkungan Chemistry Indonesian Journal of Chemical Research INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY
Syahruddin Kasim
Department Of Chemistry, Faculty Mathematics And Natural Science, University Of Hasanuddin Jln. Perintis Kemerdekaan Km.10 Makassar 90245 - Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Education Energy Engineering Environmental Science Immunology & microbiology Veterinary

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Synthesis of Gold (Au) Nanoparticles by using Bioreductor of Cocoa (Theobroma cacao L.) Rind Extract and It's Antibacterial Activity Test Sabir, Fabriani; Arif, Abdur Rahman; Kasim, Syahruddin
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 17, No 2: December 2024
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/ica.v17i2.33204

Abstract

Research on the Synthesis of Gold (Au) Nanoparticles by using Bioreductor of Cocoa (Theobroma cacao L.) Rind Extract and Its Antibacterial Activity Test has been done. This Green Synthesis method uses methanol as a solvent to extract organic compounds in the cocoa rind that function as bioreductants. The results of the synthesis were continued by testing its activity as an antibacterial. The form of gold nanoparticles can be confirmed after 30 minutes of stirring. The characterization of gold nanoparticles was carried out using a UV-Vis spectrophotometer, Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD), and Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). Based on the analysis of UV-Vis spectrophotometer, the maximum wavelength was at 553 nm with an absorbance value of 0.164. The FTIR results indicate the presence of a hydroxyl group that acts as a metal ion reducing agent so that it is not charged, while the results of the XRD analysis confirm that the gold nanoparticle crystals are Face Centered Cubic (FCC) and based on the Scherrer approach the particle size distribution has an average diameter of 6.303 nm. The SEM-EDX results showed that the gold nanoparticles had a spherical shape and were located in the M electron shell. The gold nanoparticles had an inhibitory zone of 8.9 mm in Pseudomonas aeruginosa and 7.6 mm in Bacillus subtilis bacteria.
SUSTAINABLE NICKEL RECOVERY FROM NICKEL SLAG WASTE USING DIETHYLAMINE DITHIOCARBAMATE: ENHANCING RESOURCE EFFICIENCY AND MINIMIZING ENVIRONMENTAL IMPACT Fadliah, Fadliah; Burhannudinnur, Muhammad; Taba, Paulina; Wahid Wahab, Abdul; Kasim, Syahruddin; Karim, Abdul; Hasri, Hasri; Subandrio; Widayati Putri, Tri; Nur, Arfiani; Yasmaniar, Ghanima; Husla, Ridha; Jarre, Sulistiani; Zahra, Audrey; Abdalrazaq, Eid; Kollur, Shivaa Prasad; Raya, Indah
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.22589

Abstract

Slag waste from the metal refining industry, if left to accumulate for a long time, can become a source of environmental pollution due to the content of heavy metals that can dissolve and spread to the surrounding environment. However, slag can also be an alternative source for obtaining valuable metals. Aim: This study aims to examine the ability of diethylaminedithiocarbamate ligands to recover nickel metal from slag waste through the mechanism of complex compound formation. Methodology and results: The extraction process was carried out at the optimal pH for each ligand to maximize the selectivity and efficiency of metal recovery. Characterization of the complex compounds from the reaction was carried out using various analytical techniques, including Fourier Transform Infrared Spectroscopy (FTIR), UV-visible spectroscopy (UV-Vis), X-Ray Diffraction (XRD), Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), and melting point tests to determine the thermal stability of the compound. The study results indicate that diethylaminedithiocarbamate ligands can selectively form complex compounds with nickel metal in slag and are effective in recovering metals from slag waste with a recovery value of 94.88%. Conclusion, significance, and impact study: The results of this study indicate that using diethylaminedithiocarbamate ligands can be an environmentally friendly approach to using slag waste as a secondary source of metals.
Co-Authors . Fahruddin Abdalrazaq, Eid Abdul Karim Abdur Rahman Arif, Abdur Rahman Alprianto Lullung Arfiani Nur Eka Ummi Rahayu Fadliah, Fadliah Ghanima Yasmaniar Hanapi Usman Hanapi Usman Hasri Hasri Husla, Ridha Indah Raya Indah Raya Indrawati Patabang Kollur, Shivaa Prasad M Sjahrul Muhammad Burhannudinnur Parmitha, Nadya Yuli Paulina Taba Romi Anto Ruslan Ruslan Sabir, Fabriani Sri Rahayu, Lulu Subandrio Sulistiani Jarre Syarifuddin Liong Wahid Wahab, Abdul Widayati Putri, Tri Yusafir Hala Zahra, Audrey