Results 161 to 170 of about 3,405 (219)

Legacy effects of historical gold mining on floodplains of an Australian river. [PDF]

Environ Geochem Health
Colombi F, Holland A, Baldwin D, Lawrence S, Davies P, Rutherfurd I, Grove J, Turnbull J, Macklin M, Hil G, Silvester E.   +10 more
europepmc   +1 more source

Genesis of the hydrothermal gold system in the kibaran metallogenic province (D.R.Congo): A review for the Twangiza-Namoya gold belt. [PDF]

Heliyon
Heritier RN, Li H, Ibrahim MAE, Nambaje C, Luemba M.   +4 more
europepmc   +1 more source

Pollution of water bodies and related impacts on aquatic ecosystems and ecosystem services: The case of Ghana's booming 'galamsey' industry. [PDF]

Heliyon
Bedu-Addo K, Okofo LB, Ntiamoah A, Mensah H.   +3 more
europepmc   +1 more source

Biomineralized gold nanoparticles along with endophytic bacterial taxa in needles of Norway spruce (Picea abies). [PDF]

Environ Microbiome
Lehosmaa K, Wäli PR, Sutinen A, Koskimäki JJ, Middleton M, Ahonen SHK, Männistö M, Pirttilä AM, Sutinen R.   +8 more
europepmc   +1 more source

Abiotic and biotic-controlled nanomaterial formation pathways within the Earth's nanomaterial cycle. [PDF]

Commun Earth Environ
Schindler M, Xu J, Hochella MF.
europepmc   +1 more source

Arsenopyrite oxidation – A review

Applied Geochemistry, 2009
Abstract Arsenopyrite (FeAsS) is the most common As-bearing sulfide mineral. Under oxidising conditions, such as those in mine waste systems, it breaks down to release acids of As and S into the environment, resulting in acid mine drainage with high concentrations of dissolved As.
Corkhill, C. L., Vaughan, D. J.
core   +5 more sources

Mechano-chemical oxidation of arsenopyrite

Minerals Engineering, 2019
Abstract This paper presents the results from the investigation of arsenopyrite oxidation via mechano-chemical activation, using a stirred mill. Water and hydrogen peroxide were chosen as the lixiviant and oxidant, respectively, and maintained at a relatively low temperature (50 °C).
Larissa Koroznikova, Stafford McKnight, Jean-Pierre Veder, Jason Giri, Samayamutthirian Palaniandy, Gordon Williams   +5 more
openaire   +2 more sources

Electrochemical study of arsenopyrite weathering

Physical Chemistry Chemical Physics, 2002
Cyclic voltammograms and capacitance measurements are presented to characterize the mineral response at relatively moderate environmental conditions, pH 4.5 and T = 25 °C. The experiments involve examining the rates of oxidation and the surface morphology of arsenopyrite, which is oxidized abiotically.
Almeida, CMVB, Giannetti, B. F.
openaire   +3 more sources

Oxidation of arsenopyrite in bacterial ferric solutions

, 1994
In this study the oxidation of arsenopyrite in bacterial ferric solutions is examined. Leaching tests were conducted in air-stirred pachuca reactors in order to define the major factors influencing the oxidation of arsenopyrite and to underline the importance of indirect leaching of the mineral by bacterially generated acid ferric sulphate solutions ...
Constantine Komnitsas, F. D. Pooley
openaire   +2 more sources

The ferric leaching kinetics of arsenopyrite [PDF]

Hydrometallurgy, 1999
In this investigation batch, ferric leaching experiments were carried out in a 100 ml jacketed vessel maintained at 25°C. The parameters varied during the course of the experimental program included the initial redox potential, the total iron concentration, the solids concentration and the pH of the leaching solution.
R. Ruitenberg, G.S. Hansford, M.A. Reuter, A.W. Breed   +3 more
openaire   +2 more sources