Innovating Complexing Agents for Recovery of Heavy Metals in Municipal and Industrial Wastewater

EPA Contract Number: 68D70048
Title: Innovating Complexing Agents for Recovery of Heavy Metals in Municipal and Industrial Wastewater
Investigators: Damle, Ashok S.
Small Business: Technochem Company
EPA Contact: Manager, SBIR Program
Phase: II
Project Period: September 1, 1997 through March 1, 1999
Project Amount: $225,000
RFA: Small Business Innovation Research (SBIR) - Phase II (1997) Recipients Lists
Research Category: Water and Watersheds , SBIR - Water and Wastewater , Small Business Innovation Research (SBIR)


Efficient removal and recovery of toxic heavy metals from industrial wastewater streams is a major challenge. The increasing cost of landfilling as well as valuable metal resources make removal and recovery of heavy metals from wastewater potentially economically attractive. During the Phase I effort, the feasibility of recovering toxic metals, such as cadmium, chromium, lead, and mercury, was demonstrated using metal complexing agents with appropriate solvents in an uphill facilitated transport mode in microporous hollow fiber membrane contactors. Depending upon the complexation chemistry and wastewater composition, this approach may be tailored to a specific heavy metal or may be used for simultaneous removal/recovery of multiple metals. During the Phase II efforts, this novel concept will be demonstrated for treating wastewater streams from metal finishing industries with recovery and recycling of the metal values. The proposed approach will first be scaled up by an order of magnitude in bench-scale experiments with simulated wastewater compositions. The novel process will then be demonstrated with a pilot-scale, skid-mounted system at a metal finishing facility. If successful, this recovery system will address an urgent need in industrial wastewater treatment and will provide a cost-effective method to recover the toxic metals.

Supplemental Keywords:

RFA, Scientific Discipline, Toxics, Waste, Water, Sustainable Industry/Business, National Recommended Water Quality, Municipal, Wastewater, Environmental Chemistry, Sustainable Environment, Chemistry, Technology for Sustainable Environment, Civil/Environmental Engineering, Hazardous Waste, Civil Engineering, Engineering, Hazardous, 33/50, Environmental Engineering, Mercury, heavy metal recovery, hazardous liquid waste, heavy metals removal, wastewater treatment, industrial wastewater, waste recycling, industrial waste, cadmium & cadmium compounds, chromium & chromium compounds, metal complexing agent, metal complexes, lead & lead compounds, Chromium, lead, municipal waste, metal complexing agents, metal finishing, metal recovery, activated carbon, treatment, meal complexing agents, waste recovery, mercury & mercury compounds, extraction of metals, metals removal, cadmium, aqueous waste stream, complexing agents

Progress and Final Reports:

  • Final

  • SBIR Phase I:

    Innovative Complexing Agents for Recovery of Heavy Metals in Municipal and Industrial Wastewater