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Novel Sorbents for Sorption and Recovery of Heavy Metals from Wastewater

EPA Contract Number: 68D50080
Title: Novel Sorbents for Sorption and Recovery of Heavy Metals from Wastewater
Investigators: Sarangapani, Shantha
Small Business: ICET Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1995 through March 1, 1996
Project Amount: $65,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1995)
Research Category: Water and Watersheds , SBIR - Water

Description:

An efficient method for directly removing chromate and metals such as nickel, zinc, cadmium, mercury, cobalt, chromium(III), lead in two separate stages is proposed. The highly capacity sorbents could be regenerated, recovering the chromate and other metals separately. The regeneration is expected to be efficient and is simply based on changing the pH from one extreme to another.

Bench scale characterizations of chromate specific sorbents and the ones for other metals will be carries out for their sorption capacity, adsorption isotherms, desorption conditions, cycle life and efficiency. The metals from the sorbents, except for chromate, will be recovered by electrowinning after concentration. The chromate will be concentrated, recrystallized and recycled.

Using the best set of sorbents, an environmental engineering company will conduct bench scale testing for a continuous process to assess the merits of the proposed sorbents and will present a detailed report.

Supplemental Keywords:

small business, SBIR, wastewater treatment, engineering, chemistry. , Toxics, Water, Scientific Discipline, Wastewater, Chemical Engineering, Analytical Chemistry, Mercury, Chemistry, Environmental Engineering, Environmental Chemistry, National Recommended Water Quality, 33/50, heavy metals, nickel, treatment, isotherms, chromium & chromium compounds, wastewater remediation, regeneration, cadmium & cadmium compounds, control technologies, cadmium, Chromium, metal recovery, bench scale characterisitcs, mercury & mercury compounds, Zinc, nickel & nickel compounds, water treatment, municipal wastewater, sorbents, electrowinning, chemical contaminants, alternative technology

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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.

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