US5009868-A  "Company Gets the Lead Out-And More", by G. Robert Hartup, Pollution Engineering, Dec., 1987, p. 66.;  "Iron (III) Removal from Base-Metal Electrolyte Solutions by Solvent Extraction," G. P. Demopoulos, Hydrometallurgy 12 (1981), pp. 299-315.;  "New Low-cost Wastewater Recovery Process" by Marge Boynton, Pollution Engineering, Feb. 1988, pp. 32, 34.;  "Separation of Antimony and Arsenic by Extraction with Di-2-Ethylhexyldithiosphosphoric Acid", Yukhim et al., vol. 45, No. 9, Zavodskaya Laboratories, pp. 798-800, Sep. 1979.;  Article: "A New Process Cuts Waste-Sludge Volume from Ore Leaching by About 80%," Chemical Engineering (Aug. 1989).;  Article: Meliere, Gartside, McRae and Seamans, "Description and Operation of the Webster/Ionics SO()2 Removal and Recovery Pilot Plant at the Wisconsin Electric Power Company," EPA Flue Gas Desulfurization Symposium (1974).;  Daramic 2005L , W. R. Grace & Co.;  Dished Electrode Membrane Cell, High Efficiency Electrolysis for Chemical SynthesisL , Electrocatalytic, Inc. 11/88.;  Ionac Ion Exchange MembranesL , Sybron Chemicals Inc.;  Masterton et al., Chemical PrinciplesL , WB Saunders Co., 1977, p. 529.WO9109810-A  "Description and Operation of the Stone & Webster Ionics SO2 Removal and Recovery Plant", 07 November 1984 MELIERE et al., see entire article.;  HARTUP, "Company Gets the Lead Out-and More", December 1979, see entire article.;  Hydrometallurgy, Vol. 12 (1981), DEMOPOULOS et al., "Iron(III) Removal from Base-Metal Electrolyte Solution by Solvent Extraction", PP. 299-315, see entire article.;  Industrial Labs, Vol. 45, No. 9, US, A, September 1979 YUKHIM et al. "Separation of Antimony and Arsenic by Extraxtion with DI-2-Ethylhoxyldithio-Phospheric Acid", PP. 979-981, see entire article.;  MASTERSON et al., "Chemical Principles 4th Edition, published 1977 by W.B. Saunders Company (Philadelphia), see P. 529.;  Pollution Engineering, February 1988, BOYNTON "New Low Cost Wastewater Recovery Process" page 34.;  See also references of EP 0506741A1;  See also references of EPA 0506741;  "Description and Operation of the Stone&Webster Ionics SO2 Removal and Recovery Plant", 07 November 1984 MELIERE et al., see entire article.EP506741-A1  See also references of WOA 9109810;  INDUSTRIAL LABS, vol. 45, no. 9, September 1979, US; YUKHIM et al., pp. 979-981;  See also references of WO 9109810A1EP506741-B1  DESCRIPTION & OPERATION OF THE STONE & WEBSTER IONICS SO2 REMOVAL AND RECOVERY PLANT, 07 November 1984, Environmental Protection Agency, Atlanta, GA (US); K.A. MELIERE et al.;  G.R. HARTUP, "Company Gets the Lead Out-and More", December 1979;  HYDROMETALLURGY, vol. 12, 1981; DEMOPOULOS et al., pp. 299-315;  INDUSTRIAL LABS, vol. 45, no. 9, September 1979, US; YUKHIM et al., pp. 979-981;  MASTERSON et al., "Chemical Principles 4th Edition, published 1977 by W.B. Saunders Company, Philadelphia, PA (US); p. 529;  POLLUTION ENGINEERING, February 1988; BOYNTON, p. 34