1. MINTEQA2/PRODEFA2, a geochemical assessment model for environmental systems: Version 3.0 user's manual;Allison;U.S. Environmental Protection Agency Report 1600/3-91/021,1991
2. Standard Methods for the Examination of Water and Wastewater;APHA, AWWA and WPCF,1985
3. Biochemical Engineering Fundamentals;Bailey,1986
4. Separation of toxic heavy metals by sulfide precipitation;Bhattacharyya;Separat. Sci. Technol.,1979
5. Precipitation of heavy metals with sodium sulfide: bench-scale and full-scale experimental results;Bhattacharyya,1981