- Country: USA
- Summary: Electrochemical Arsenic Immobilization for Sustainable Cobalt Production
- UST Ref No: 120602191
- Deadline: 09 Jul 2025
- Financier: Self Financed
- Purchaser Ownership: Government
- Tender Value: Refer Document
- Notice Type: Tender
- Document Ref. No.: BA-1410-2
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- Description:
- Description
Technology Summary
This technology introduces an electrochemical method for extracting cobalt from sulfoarsenide minerals, such as cobaltite (CoAsS), while simultaneously immobilizing arsenic as scorodite (FeAsO₄·2H₂O), a stable and low-solubility mineral form. The process enables cobalt production from arsenic-rich domestic sources by addressing both metal recovery and arsenic stabilization in a single system. The method operates at moderate temperatures (up to 70°C) and under ambient pressure conditions, without the need for chemical oxidants or high-pressure equipment.
Challenge
Domestic sources of cobalt remain largely untapped due to the presence of arsenic, which complicates extraction and disposal. Existing approaches to arsenic immobilization are energy-intensive, require high-pressure systems, and often depend on hazardous oxidants such as hydrogen peroxide. These limitations present cost, safety, and environmental challenges to scaling up cobalt production from arsenide-rich ores.
Solution
The system consists of a two-compartment electrochemical cell separated by an anion exchange or bipolar membrane. In the anode compartment, a sulfuric acid electrolyte (pH Fe(II) is oxidized to Fe(III) at the anode via applied current. Fe(III) reacts with the mineral (e.g., CoAsS), releasing cobalt and dissolving arsenic. As(III) is oxidized to As(V) chemically or electrochemically. Fe(III) and As(V) combine to form scorodite, which precipitates from solution.This process allows for the selective extraction of cobalt while co-precipitating arsenic in a stable, low-mobility form.
Key Advantages
Integrated Processing: Combines metal extraction and arsenic immobilization in one step. Lower Input Requirements: Operates without external oxidants (e.g., H₂O₂) and under ambient pressure. Improved Environmental Management: Produces scorodite, which meets criteria for long-term arsenic stabilization. Reduced Energy Consumption: Elimina... - Documents:
Electrochemical-leaching-of-cobalt-from-cobaltite.pdf
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CLICK HERE TO LOGINElectrochemical Arsenic Immobilization for Sustainable Cobalt Production - USA Tender
The ENERGY, DEPARTMENT OF, a Government sector organization in USA, has announced a new tender for Electrochemical Arsenic Immobilization for Sustainable Cobalt Production. This tender is published on USARFP under UST Ref No: 120602191 and is categorized as a Tender. Interested and eligible suppliers are invited to participate by reviewing the tender documents and submitting their bids before the deadline on 2025-07-09.
The estimated tender value is Refer Document, and full details, including technical specifications and submission requirements, are provided in the official tender documents. Ensure all submissions meet the criteria outlined to be considered for evaluation.
