METHOD OF JOINT OR SELECTIVE EXTRACTION OF IONS OF HEAVY METALS FROM AQUEOUS SOLUTIONS

• Main Authors: RUBANOVSKAJA S.G, KOZYREV E.N, TSOGOEV V.B, VELICHKO L.N
• Format: Patent
• Language: English; Russian
• Published: 10.11.2005
• Edition: 7
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

FIELD: joint and selective extraction of heavy metal ions from aqueous solutions by clay minerals irlit-1 and irlit-7; non-ferrous and ferrous metallurgy; treatment of waste water. ^ SUBSTANCE: proposed method includes introducing the clay materials into starting solution followed by mixing and settling; used as clay-containing materials are hydromica clays of sea nature: irlit-1 and/or ielit-7 in the amount not exceeding 5 g/dm3; selective or joint extraction of heavy metal ions is performed at pH of starting solution equal to 3-6.5 or at adjustment of acid and basic characteristics of solution at pH=6.5-12. ^ EFFECT: enhanced efficiency; low cost of process; reduced consumption of reagents. ^ 1 tbl, 5 ex