scholarly journals Enhanced cementation of gold via galvanic interactions using activated carbon and zero-valent aluminum: A novel approach to recover gold ions from ammonium thiosulfate medium

2020 ◽  
Vol 191 ◽  
pp. 105165 ◽  
Author(s):  
Sanghee Jeon ◽  
Carlito Baltazar Tabelin ◽  
Hirotaka Takahashi ◽  
Ilhwan Park ◽  
Mayumi Ito ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ammonium Thiosulfate ◽  
Novel Approach

Temperature Dependent On Activated Carbon For Their Biological Activity And Photocatalytical Degradation of Methylene Blue: A Novel Approach To Green Synthesis

2021 ◽  
Author(s):  
Amalanathan.M ◽  
Aravind.M ◽  
Sony Michael Mary.M ◽  
Razan A. Alshgari ◽  
Asma A. Alothman ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Antibacterial Activity ◽  
Activated Carbon ◽  
Hydrothermal Carbonization ◽  
Microbial Pathogens ◽  
X Ray Diffraction ◽  
E Coli ◽  
Novel Approach ◽  
Transmission Electron ◽  
Ft Ir

Abstract In this work, jasmine flower derived activated carbon were successfully synthesized by hydrothermal carbonization process at the different annealing temperature. The Crystallinity, phase, structural, morphological and optical properties of activated carbon were investigated using X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Transmission electron microscope (TEM), and UV-visible spectroscopy analysis. The graphitic phase of carbon was obtained from the XRD pattern. Surface morphology reveals irregular-shaped nanoparticles. The photodegradation of methylene blue (MB) was carried out under the visible light irradiation technique to study its photocatalytic activity. The activated carbon obtained at 400oC, 500oC and 600oC shows a photocatalytic degradation efficiency of 86%, 90%, and 94%, respectively. Antibacterial activity of activated carbon was examined against S. Aureus (MTCC-737) and E-Coli (MTCC- 443) microbial pathogens, and their potent antibacterial activity was examined from the zone of inhibition layer.

scholarly journals A NOVEL APPROACH FOR WATER TREATMENT BY USING ACTIVATED CARBON : APRICOT KERNEL SHELL

2018 ◽  
Vol 26 (1) ◽  
pp. 1-7
Author(s):  
Sadaf ADHAMİ ◽  
Hamed GHORBANPOOR ◽  
Berat AZAK ◽  
Serkan KAPUCU ◽  
Macid Nurbas ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Apricot Kernel ◽  
Novel Approach

A novel approach for the production of chemically activated carbon fibers

2015 ◽  
Vol 260 ◽  
pp. 463-468 ◽  
Author(s):  
Noel Díez ◽  
Patricia Álvarez ◽  
Marcos Granda ◽  
Clara Blanco ◽  
Ricardo Santamaría ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Novel Approach

A novel approach towards high-performance composite photocatalyst of TiO2 deposited on activated carbon

2009 ◽  
Vol 255 (7) ◽  
pp. 3953-3958 ◽  
Author(s):  
Xiaojing Wang ◽  
Zhonghua Hu ◽  
Yujuan Chen ◽  
Guohua Zhao ◽  
Yafei Liu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Performance ◽  
Composite Photocatalyst ◽  
Novel Approach ◽  
High Performance Composite

scholarly journals The Effects of Coexisting Copper, Iron, Cobalt, Nickel, and Zinc Ions on Gold Recovery by Enhanced Cementation via Galvanic Interactions between Zero-Valent Aluminum and Activated Carbon in Ammonium Thiosulfate Systems

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1352
Author(s):  
Sanghee Jeon ◽  
Sharrydon Bright ◽  
Ilhwan Park ◽  
Carlito Baltazar Tabelin ◽  
Mayumi Ito ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Metal Ions ◽  
Base Metal ◽  
Copper Ions ◽  
Zinc Ions ◽  
Promising Technique ◽  
Iron Cobalt ◽  
Ammonium Thiosulfate ◽  
Cobalt Nickel ◽  
Ore Processing

The use of galvanic interactions between zero-valent aluminum (ZVAl) and activated carbon (AC) to recover gold (Au) ions is a promising technique to overcome the challenges due to the poor recovery in ammonium thiosulfate systems, but the applicability to practical Au ore processing remains elusive so far. The present study describes (1) the recovery of Au ions from low Au concentrations, which are typical concentrations used in Au ore processing; and (2) an investigation into the effects of various coexisting base metal ions that can be present in pregnant ore-leached solutions. The results showed that high Au recovery (i.e., over 85%) was obtained even at low Au concentrations under the following conditions: 1:1 of 0.15 g of ZVAl and AC with 10 mL of ammonium thiosulfate solution containing 5 mg/L of Au ions at 25 °C for 1 h in an anoxic atmosphere. Selected coexisting metal ions (i.e., copper, iron, cobalt, nickel, and zinc) were studied to establish their effects on Au recovery, and the results showed that the Au recovery was enhanced (about 90%) when copper ions coexist in the solution with minimal effects from other competing base metal ions.

scholarly journals A Kinetic Study on Enhanced Cementation of Gold Ions by Galvanic Interactions between Aluminum (Al) as an Electron Donor and Activated Carbon (AC) as an Electron Mediator in Ammonium Thiosulfate System

Minerals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 91
Author(s):  
Sanghee Jeon ◽  
Sharrydon Bright ◽  
Ilhwan Park ◽  
Akuru Kuze ◽  
Mayumi Ito ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electron Donor ◽  
Promising Technique ◽  
Electron Mediator ◽  
Initial Concentration ◽  
First Order ◽  
Ammonium Thiosulfate ◽  
First Order Kinetics ◽  
Galvanic Interaction ◽  
Kinetics Of

The enhanced cementation technique by galvanic interaction of aluminum (Al; electron donor) and activated carbon (AC; electron mediator) to recover gold (Au) ions from the ammonium thiosulfate solution is a promising technique to eliminate the challenges of poor recovery in the system. This study presents the kinetics of Au ion cementation in an ammonium thiosulfate lixiviant as functions of initial Au concentration, size/amount of Al and AC, temperature, and shaking speed. The recovery results basically followed first order kinetics and showed that the cementation rate increased with a higher initial concentration of Au, smaller electron donor size, greater both electron donor and mediator quantity, decrease in temperature, and higher shaking speed in the system, while size of electron mediator did not significantly affect Au recovery.

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