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Primeiro livro brasileiro para estudantes da arte da ourivesaria, profissionais atuantes e técnicos responsáveis pela produção industrial de joias em ouro e prata maciças e de joias folheadas. O livro faz uma introdução sobre conceitos e propriedades dos materiais metálicos e aborda a produção de produtos metálicos por processos de fundição, conformação mecânica e brasagem/soldagem. Na obra são apresentadas propriedades e características de fabricação de ligas de ouro, prata, latão e estanho, de forma didática e repleta de ilustrações e tabelas explicativas.

This book gives an overview of all the gold extraction processes along with their mechanistic study and environmental impact. Reviews extraction techniques previously employed as well as recently evolved technology for gold leaching, provides technical flow sheets for processing of ores with a diversity of lixiviants and offers a compulsory overview of every gold processing techniqueIt also discusses recent integrated techniques including hydro- and bio-metallurgical techniques with examples

The fascination with gold is a story which spans millennia, however scientists have recently found a new interest for gold when it is divided into miniscule grains, such as gold nanoparticles. This scientific enthusiasm started in various fields of science in the middle of the 1980s and the present book offers a panorama of the major scientific achievements obtained with gold nanoparticles.Various topics are reviewed such as: gold nanoparticle preparation methods, their plasmon resonance and thermo-optical properties, their catalytic properties, their use in biology and medicine as well as their possible toxicity and, finally, their future technological applications. The book also contains an in-depth study of the use of gold nanoparticles throughout the ages, starting from times where the concept of nanoparticles was beyond the realm of human imagination. All these topics are presented by world-class scientists within a set of self-contained chapters.This book may be used as an advanced textbook by graduate students and scientists who need an introduction to gold nanoparticles. It is also suitable for experts in the related areas of chemistry, biology, material science, optics and physics, who are interested in broadening their knowledge and who wish to have an overview of the subject. Each chapter gradually leads the reader from the basics of a topic towards some of the current scientific challenges in the area. The necessary background material to achieve a solid understanding of each topic and the scientific literature to go further in the field is provided.

The history of gold begins in antiquity. Bits of gold were found in Spanish caves that were used by Paleolithic people around 40,000 B.C. Gold is the'child of Zeus,'wrote the Greek poet Pindar. The Romans called the yellow metal aurum ('shining dawn'). Gold is the first element and first metal mentioned in the Bible, where it appears in more than 400 references. This book provides the most thorough and up-to-date information available on the extraction of gold from its ores, starting with the miner­ alogy of gold ores and ending with details of refining. Each chapter con­ cludes with a list of references including full publication information for all works cited. Sources preceded by an asterisk (•) are especially recom­ mended for more in-depth study. Nine appendices, helpful to both students and operators, complement the text. I have made every attempt to keep abreast of recent technical literature on the extraction of gold. Original publications through the spring of 1989 have been reviewed and cited where appropriate. This book is intended as a reference for operators, managers, and designers of gold mills and for professional prospectors. It is also designed as a textbook for extractive metallurgy courses. I am indebted to the Library of Engineering Societies in New York, which was the main source of the references in the book. The assistance of my son, Panos, in typing the manuscript is gratefully acknowledged.

The Chemistry of Gold Extraction is an extensively revised and comprehensively updated edition of the well-known reference first published in 1992. It provides the broad base of knowledge that is now required by all those working in the gold extraction and gold processing industries. The book bridges the gap between research and industry by emphasizing the practical applications of chemical principles and techniques. The technical reference includes in-depth discussions on: Historical DevelopmentsOre Deposits and Process MineralogyProcess SelectionPrinciples of Gold HydrometallurgyOxidative PretreatmentLeachingSolution Purification and ConcentrationRecoverySurface Chemical MethodsRefiningEffluent TreatmentIndustrial Applications