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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Deriving Value from Challenging Waste Streams: Recycling and Sustainability Joint Session
Presentation Title B-7: Bacterial Degradation of Free Cyanide in Alkaline Medium Using Bacillus Licheniformis Strain
Author(s) Amzy Tania Vallenas Arévalo, Carlos Gonzalo Alvarez Rosario, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenório
On-Site Speaker (Planned) Amzy Tania Vallenas Arévalo
Abstract Scope Cyanide is a toxic chemical used in mining industry to recover gold and silver in leaching process. Effluents containing cyanide can be treated by bioremediation instead of physical and chemical processes which are often more expensive and less efficient. This study evaluated the capacity for free cyanide degradation of a Bacillus licheniformis strain previously isolated from an abandoned gold mine. First, bacterial growth in LB medium through OD600 was studied. Then, bacteria was adapted to grow on alkaline medium using CAPS buffer to keep pH10. Finally, cyanide degradation assays were performed using a 500mgL-1 KCN pH10 50mM CAPS solution. Free cyanide was measured using a polarographic method. Temperature influence was evaluated at 27, 32 and 37°C. Results showed that B. licheniformis was able to degrade 99% of free cyanide after 5 days of incubation and works better at 32°C showing the strain potential for cyanide biotreatment in mining industry.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Sustainable Methodology for Recycling Electric Arc Furnace Dust
An Eco-friendly Extraction Method for Recovery of Valuable Metals from Spent Ni-W/Al2O3-SiO2 Catalysts
An Electrochemical Procedure for Copper Removal from Regenerated Pickling Solutions of Steel Plants
B-10: Evaluation of the Occurrence of Fouling and Scaling on the Membrane HDX 200 for the Treatment of the Effluent of Brass Electrodeposition with EDTA as Complexing Agent
B-11: High Temperature Crystallization Kinetics of MgSO4.H2O
B-12: Incorporation of Rubber Waste Powder from Scrap Tires into Heavy Clay Ceramics
B-14: Preparation of Glass-ceramic from Titanium-bearing Blast Furnace Slag by “Petrurgic” Method
B-16: Recovery of Copper from Nickel Laterite Leach Waste by Chemical Reduction Using Sodium Dithionite
B-17: Recovery of Nickel and Cobalt from a Waste Zone of Nickel Laterite Ore Using a Mixture of Extractants in Solvent Extraction Technique
B-18: Rural Water Pollution and its Strategies in China
B-19: Study on the Passivation Effect of Cr6+ in the Waste Water of the Blood Meal
B-20: Mechanical Behavior of White Ordinary Portland Cement Paste with Iron Oxide Powders Containing Arsenic
B-7: Bacterial Degradation of Free Cyanide in Alkaline Medium Using Bacillus Licheniformis Strain
B-8: Determination of Limiting Current Density of a Solution with Copper, Zinc and EDTA from the Effluent of Brass Electrodeposition
B-9: Effect of the pH on the Recovery of Al3+, Co2+, Cr3+, Cu2+, Fe3+, Mg2+, Mn2+, Ni2+ and Zn2+ by Purolite S950
Behavior of Co, Ni and Precious Metals in Copper Converting Process: Experimental Study
Comminution and Separation of Photovoltaic Panel Materials for Recycling
Complete Recycling of Waste Diamond Cutting Tools by an Electrochemical Method
Different Methods for the Characterization of Ash Compositions in Co-firing Boilers
Effect of Ferrosilicon on Reduction of Cr2O3 in Steelmaking Slags
Engineering, Scientific, and Policy Inputs for Developing a Levelized Cost of Energy Storage Model
Kinetic Investigations on the Recovery of Residues from the Stainless Steel Industry
Mechanisms for Advancing Recovery of Resources from Small Sized End-of-life (EoL) Equipment
Novel Technologies for Technospheric and Urban Mining of Rare Earth Elements from Phosphogypsum, Red Mud, Hybrid Car Batteries, and Wind Turbine Magnets
Rapid Removal of Pb(II) from Acid Wastewater Using Vanadium Titanium-bearing Magnetite Particles Coated by Humic Acid
Recovery of Copper from Industrial Waste Water by Electrowinning
Recovery of Gallium and Arsenic from Gallium Arsenide Semiconductor Scraps
Recovery of REE from the Ferrous Fraction of Processed WEEE
Recycling of EAF Dust through Source Separation
Study of the Synthesis of MgAl2O4 Spinel Refractory from Waste Chromium Slag of a Chrome Plant in China
Tannic Acid as a Flame Retardant - Deriving Value from Leather Tanning Waste
Thermal Separation and Leaching of Valuable Elements from Waste-derived Ashes
Towards Commercialization of Indium Recovery from Waste Liquid Crystal Display Screens
Upgrading the Copper Value in a Waste Copper Smelter Dust with the Falcon Gravity Concentrator
Urban Mining for a Circular Economy: Activities at SINTEF
Utilization CFA-derived Tobermorite Fiber as Crystallization Revulsive in Autoclaved Concrete Block Production

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