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Information Circular
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Precious Metals Recovery from Low-grade Resources
This information circular describes research the Bureau of Mines has conducted to improve technology for recovering precious metals from low-grade resources. Many of the reported findings are recent, and some of te work described is ongoing. Topics discussed include cyanidation of carbonaceous gold ores to enhance gold recovery, a new method for precipitating mercury during cyanide leaching of gold ores, a staged heap leaching process to generate suitable solutions for direct electrowinning of gold, the use of anion-exchange resins to recover gold from cyanide solutions, and precious metals recovery from electronic scrap.
Minerals Today
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The Biological Standard of Living in Comparative Perspective
Inhalt: Part I: The Americas, Asia and Australia: Mit Beitr�gen von: Stephen L. Morgan; Stephen Nicholas / Robert Gregory / Sue Kimberley; Henk-Jan Brinkman / J.W. Drukker; Ricardo Salvatore / J�rg Baten; Ricardo D. Salvatore; Insong Gill; Richard H. Steckel / Paul W. Sciulli / Jerome C. Rose; Michael R. Haines; Philip R. P. Coelho / Robert A. McGuire; Lee A. Craig / Thomas Weiss; Timothy Cuff; John Komlos; Brian A'Hearn; Barry Bogin / Ryan Keep; Markus Heintel; W. Peter Ward Part II: Europe: Mit Beitr�gen von: Edwin Horlings / Jan-Pieter Smits; Jos� M. Martinez Carri�n / Juan J. Perez Castej�n; Gloria Quiroga Valle; Sebasti�n Coll; Lydia Sapounaki-Dracaki; Bernard Harris; Markus Heintel / Lars G. Sandberg / Richard H. Steckel; Joaquim da Costa Leite; Jesper L. Boldsen / Jes S�gaard; Holle Greil; Sally Horrocks / David Smith; Philip T. Hoffman - Joerg Baten / John Komlos: Conclusion "Die mit umfangreichen Literaturverweisen bereicherten Beitr�ge bieten ueberraschend konkrete Einblicke in die Sozialstruktur der verschiedensten Bev�lkerungsgruppen und ihre Lebensbedingungen." Das Historisch-Politische Buch .
