Electrochemical Arsenic Immobilization Tender in USA - 139611142

Procurement Summary

Country: USA

Summary: Electrochemical Arsenic Immobilization for Sustainable Cobalt Production

Deadline: 09 Jul 2026

Posting Date: 16 Apr 2026

Other Information

Notice Type: Tender

TOT Ref.No.: 139611142

Document Ref. No.: BA-1410-2

Competition: ICB

Financier: Self Financed

Purchaser Ownership: Public

Tender Value: Refer Document

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Tender Details

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 Consumptio...
Notice ID: ba-1410-2

Department/Ind. Agency: energy, department of

Sub-tier: energy, department of

Office: battelle energy alliance–doe cntr

Product Service Code: 6810 - chemicals

NAICS Code: 325180 - Other Basic Inorganic Chemical Manufacturing

Inactive Dates: jul 24, 2026

Inactive Policy: 15 days after response date

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