Results 41 to 50 of about 145,458 (298)

THE EVOLVING PARADIGM OF COMMUNITY MINING SCHEMES IN GHANA: PROSPECTS AND LESSONS FOR OTHER MINING JURISDICTIONS IN AFRICA

African Journal on Land Policy and Geospatial Sciences
Context and background: Globally, Ghana is one of the major mining jurisdictions that has rolled out community mining schemes in response to curbing illegal small-scale mining.
Simon Victory Quarcson Hamenoo, Theresa Y. Baah-Ennumh , Rudith S. King   +2 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Self‐Sintering Ionogel Binder for Flexible, Recyclable, and Healable Printed Giant Magnetoresistive Sensors

Advanced Functional Materials, EarlyView.
ABSTRACT Electronic waste has emerged as a major environmental challenge, driven by the massive consumption and a limited lifetime of modern electronic devices, stimulating the development of sustainable electronics. Here, an all‐biomaterial gelatin‐choline‐citric acid ([Ch][CA]) ionogel is developed as an active binder to realize self‐sintered ...
Lin Guo, Xiaotao Wang, Guannan Mu, Proloy Taran Das, Igor Veremchuk, Conrad Schubert, Aaron D. Cross, Yevhen Zabila, Xuan Peng, Larysa Baraban, Denys Makarov   +10 more
wiley   +1 more source

Artisanal and Small-Scale Gold Mining

, 2021
Artisanal gold mining occurs informally and therefore relies on low technologies and extraction methods lacking pollution controls. As a result, despite the fact that artisanal gold mining produces only twenty percent of the world’s gold, it releases more mercury than any other sector and represents the largest source of mercury emissions.
openaire   +3 more sources

International Interdisciplinary Collaboration: Artisanal and Small Scale Gold Mining and Mercury Contamination in Colombia [PDF]

, 2019
This paper describes key aspects of our experience with international interdisciplinary collaboration. Two Colombian engineers and an American interdisciplinary researcher comprised our team.
Cristian A. Flórez, Oscar Jaime Restrepo Baena, Mateo S. Pimentel   +2 more
core  

Coexistence between conventional and small-scale gold mining in Colombia [PDF]

, 2021
IlustracionesEste trabajo contribuye al debate sobre el análisis del conflicto entre la minería de pequeña escala y la minería convencional por los derechos de extraer oro en Colombia.
Tarra Almario, Jorge Armando
core   +1 more source

Polymer Interface Enables Reversible Quasi‐Solid Sulfur Conversion in Sodium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
The polymer interface enables a stable quasi‐solid sulfur conversion pathway in room‐temperature Na─S batteries. The coating regulates Na+ transport, stabilizes the cathode–electrolyte interphase, and accommodates mechanical stress, suppressing electrolyte decomposition and sulfur migration, thereby improving reaction uniformity, reducing polarization,
Reza Andaveh, Ying Zhao, Enzhong Jin, Zixin Zhang, Vinicius Martins, Parham Pirayesh, Yi Gan, Yi Yuan, Yijia Wang, Frederick Benjamin Holness, Changhong Cao, Jun Song, Yang Zhao   +12 more
wiley   +1 more source

Assessment of workers’ knowledge and views of occupational health hazards of gold mining in Obuasi Municipality, Ghana

International Journal of Occupational Safety and Health, 2020
Background: Small-scale mining in Ghana has been a major community and national concern due to its contribution to the destruction of farmlands and bodies of water, and to the loss of human life.
Michael Atakora, Berndt Stenberg
doaj   +3 more sources

Methodology to Determine the Associative Potential of Small-Scale Mining Communities

Mining
This study presents a methodology developed in collaboration with the Colombian National Mining Agency, aimed at enhancing the economic and productive activity of small-scale miners in Colombia through the promotion of associativity.
Oscar Jaime Restrepo-Baena, Sara Pérez-Zapata, María Margarita Gamarra, Jorge Iván Tobón, Gustavo Viana   +4 more
doaj   +1 more source

Partnership on Reducing Mercury in Artisanal and Small-Scale Gold Mining (ASGM)

E3S Web of Conferences, 2013
The Artisanal and Small Scale Gold Mining Partnership area is an initiative to reduce global mercury pollution through coordinated voluntary actions. This partnership area, co-led by Natural Resources Defense Council and the United Nations Industrial ...
Bernaudat L., Keane S.
doaj   +1 more source