Novel Sorbents for Sorption and Recovery of Heavy Metals from WastewaterEPA 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
Project Period: September 1, 1995 through March 1, 1996
Project Amount: $65,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1996) RFA Text | Recipients Lists
Research Category: Water and Watersheds , SBIR - Water and Wastewater , Small Business Innovation Research (SBIR)
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.