Arsenic-safe sponge media for in-situ selenium attenuation in groundwater
A retrievable reactive sponge platform designed for passive treatment of selenium-impacted groundwater, utilizing a permeable cellulose scaffold with iron and manganese-oxide interfaces to attenuate selenium while minimizing arsenic mobilization. This technology offers regeneration and redeployment capabilities, reducing secondary waste and enhancing sustainability.
Overview
The arsenic-safe sponge media is an innovative solution for the in-situ attenuation of selenium in groundwater, designed to address selenium contamination while ensuring arsenic stability. This technology utilizes a retrievable reactive sponge platform that passively treats selenium-impacted groundwater. It extends the recover–regenerate–reuse remediation platform with a permeable cellulose scaffold supporting iron- and manganese-oxide reactive interfaces. The integration of iron oxides provides adsorption sites for selenium oxyanions, while manganese oxides maintain redox conditions that stabilize arsenic and prevent its mobilization. This design not only attenuates dissolved selenium but also minimizes secondary waste through regeneration and redeployment.
Technical specifications
Key features:
- Reactive Interfaces: Combines iron- and manganese-oxide surfaces for dual-functionality—selenium adsorption and redox control.
- Regeneration Capability: The retrievable design allows for easy regeneration and redeployment, enhancing sustainability and reducing waste.
- Versatile Conditions: Evaluates selenium oxyanions under various groundwater conditions, including competing oxyanions and mixed redox environments.
Applications:
- Designed for groundwater treatment, particularly in selenium-impacted regions.
- Suitable for sites where arsenic mobilization is a concern, providing a balanced approach to contaminant management.
Technology readiness level
Currently at Technology Readiness Level 3, this solution has been advanced from laboratory development to patented technologies with commercial deployment. Ongoing validation includes optimizing sponge formulation, quantifying arsenic immobilization, and establishing design criteria for pilot-scale evaluation. This phase includes testing under representative groundwater conditions to refine operational stability and treatment capacities.
About Northwestern University
Northwestern University is a comprehensive private research university with campuses in Evanston and downtown Chicago and a collaborative, cross‑disciplinary culture. Integration with a major hospital system enables clinical research, diverse patient access, and rapid translation from bench to bedside. Shared research cores, prototyping facilities, a campus incubator, and dedicated corporate engagement teams make it straightforward to scope projects, structure agreements, and place talent. Research is supported by competitive federal funding from agencies such as NIH, NSF, DOE, and DoD, complemented by foundation and industry partnerships. A dedicated technology transfer office advances IP strategy, licensing, and startup formation.
delivered to your inbox.