Current methods of technogenic gold placer deposit mining with small size gold extraction technology

Treatment of small scale gold mining wastewater using pilot-scale sedimentation and Cocopeat filter bed system

The use of amalgamation process to recover gold from mined ores by the small-scale gold miners in the Philippines and other developing countries produces and dispose of untreated wastewater to the receiving water bodies. In this study, a field-scale filter bed system was constructed to treat heavy metal metal-laden wastewater collected from small-scale gold mining site in Paracale, Camarines No...

Quicksilver & Gold: Mercury Pollution from Artisanal and Small-Scale Gold Mining

Mining for Digital Gold: Technology Due Diligence for CIOs

How do CIOs decide which technologies to acquire and deploy? This paper presents a set of criteria used by CIOs to vet technology decisions and spread their technology bets. There is insight to be gained by defining, understanding, and applying these criteria. In fact, the more we understand the technology due diligence process the better our understanding of technology leverage becomes. Ultima...

Size-dependent binding energies of methane to small gold clusters.

The reactions of small gold cluster cations Au(x)(+) (x=2-6) with CH(4) were studied by joint gas-phase kinetics and first-principles density functional theory calculations. The experimentally obtained temperature-dependent low pressure rate constants were analyzed by employing the Lindemann energy transfer model for association reactions in conjunction with statistical RRKM theory. In this way...

Management challenges on small-scale gold mining activities in Brazil.

This article presents a focused study of environmental management in small-scale gold mining, called garimpo, at the Tapajós River in the Amazon basin (Brazil). Environmental management is necessary in this very important area not only for Brazil but for the general world welfare. The fact that this is a very dispersed area, with a very low economic and education level, complicates the issues. ...