Search Documents

By Nick Bower, Richard Giffen

N/A

Jun 13, 2021

By Sebastian Sucri, Percy Townsend

INTRO PAGE

Jun 13, 2021

By Everett Litton, Ehsan Alavi

N/A

Jun 13, 2021

By Chris Lynagh, Lisa Smiley

INTRO PAGE

Jun 13, 2021

By Anton Hupfauf, Peter Raleigh

INTRO PAGE

Jun 13, 2021

By TONY CICINELLI

INTRO PAGE

Jun 13, 2021

By Renee Fippin

INTRO PAGE

Jun 13, 2021

By Andrew Bursey, Colin Lyons

INTRO PAGE

Jun 13, 2021

By Aaron McClellan, Eric Levonas

INTRO PAGE

Jun 13, 2021

By Jesse Salai, Colin Sessions

INTRO PAGE

Jun 13, 2021

By Mike Stolkin, Julio Martinez

INTRO PAGE

Jun 13, 2021

By Dillon Tew, Kush Chohan

N/A

Jun 13, 2021

By David Watson, Steve Price

INTRO PAGE

Jun 13, 2021

By Stephen Njoloma, Amitabha Mukherjee

INTRO PAGE

Jun 13, 2021

By Mohamed Younis, Keith Ward

INTRO PAGE

Jun 13, 2021

By Dave Dorfman, Ben DiFiore

INTRO PAGE

Jun 13, 2021

By Bruno Paponetti, Luigi Toro, Carlo Abbruzzese, Maria Y. Duarte, Anna Marabini

A bioleaching process has been developed to extract manganese from low grade domestic resources not amenable to conventional mineral processing operations. Between the different strains of microrganisms tested, Thiobacillus ferrooxidans has appeared poor over manganese, Aspergillus niger allowed to obtain high recovery, probably due to the metabolic production of citric and oxalic acids, showing a remarkable complexing and reducing action. The growth of microflora has been correlated to the MnO dissolution as confirmed by SEM observation.

Jan 1, 1989

By Herbert E. Allen, Andrew F. Kingery, Spyros P. Pavlou

This paper examines and compares the role that chemical speciation plays in the environmental aquatic toxicity of two metals - copper and arsenic. Copper is shown to have well-understood chemical speciation equilibria, but poorly known species toxicities. Arsenic presents the opposite case, with unpredictable speciation in aquatic systems, but is relatively easy to evaluate toxicologically. Speciation is not currently incorporated into Water Quality Standards. This can have a major impact on the cost of environmental containment and cleanup.

Jan 1, 1992

By Angelus S. C. Owili-Eger

The protection of groundwater resources is a growing issue on both the legislative front and within the private sector. At present, the legislative push is to establish within the Environmental Protection Agency a comprehensive research, development, and demonstration program relating to groundwater contamination and resources. It is evident that certain aspects of such legislation will be directed at the mining industry. Consequently, the mining industry must position itself to address the issues and concerns from a backdrop of facts and knowledge by developing an integrated hydrogeochemical model of the mining environment.

Jan 1, 1989

By Leopoldo Cortez, Fernando Durão

The dynamic control of a froth flotation section is simulated through a neural network feedback controller, trained in order to stabilize the concentrate metal grade and recovery by applying random step changes to the feed metal grade. The results of the application example show that this controller seems to be sufficiently robust and a good alternative to handle a non-linear process.

Jan 1, 1995