pyrite transport mobile

Charge Carrier Transport in Iron Pyrite Thin Films:

The origin of p-type conductivity and the mechanism responsible for low carrier mobility were investigated in pyrite (FeS 2) thin films. Temperature-dependent resistivity measurements (10–400 K) were performed on polycrystalline and

Synthesis, Characterization, and Variable Range Hopping

2013年1月28日 Field effect transport measurements showed that these pyrite nanostructures appear to behave as a moderately p-doped semiconductor with an average resistivity of 2.19 ±

Optical and Electrical Transport Evaluations of n-Type

A systematic study of chem. vapor transport of pyrite with halogens, hydrogen halides, and ammonium halides as transporting agents shows that the transport with Cl and Br in a temp. gradient ΔT = 920-820 K yields the highest

The mechanisms of pyrite oxidation and leaching: A fundamental ...

2010年9月1日 Pyrite oxidation is economically important in mineral flotation and leaching, two industrial methodologies used to separate pyrite from other minerals of value. Oxidation can

Ferromagnetism in a Semiconductor with Mobile Carriers via Low

2021年4月8日 We show that doped cubic iron pyrite, which is a diamagnetic semiconductor, becomes ferromagnetic when p -type doped. We furthermore find that this material can exhibit

Element mobility during pyrite weathering: implications for acid

2005年10月5日 The cellular ferric oxide layer correlates with the strongest weathering phase and results from the dissolution of nubby ferric oxide by acidic porewater. Leaching coefficient

UC Berkeley - eScholarship

hopping transport in pyrite thin films can be correlated to sulfur vacancy related defect. The results provide insights on electronic properties of pyrite thin films and their implications for

Reactive transport modeling in fractured rock: A state-of-the

2005年10月1日 In this state-of-science review, the key objectives were to examine the applicability of reactive transport codes for exploring issues of redox stability to depths of

Chemical vapour transport of pyrite (FeS2) with halogen (Cl, Br, I)

1986年12月1日 A systematic study of chemical vapour transport (CVT) of pyrite with halogen, hydrogen halides and ammonium halides as transporting agents has shown that the transport

Introducing pyridyl into electron transport materials plays a key

2019年6月13日 Our results showed that introducing pyridyl changes the molecular packing mode from the herringbone packing motif in TDTP to two-dimensional π–π stacking in p

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2024年2月23日 With Hogia Transport Mobile you can communicate directly with your drivers with the information that matters, such as contact information and special load instructions. With Hogia Transport Mobile you can reach the entire fleet in a consistent way, regardless of whether the user is an employee or a contractor from another firm.

Pyrite Transport, 4258 S Highway 99, Stockton, CA 95215, US

Pyrite Transport is a transportation company based in Stockton, CA, specializing in the movement of goods and materials for businesses and individuals. With a focus on efficiency and reliability, Pyrite Transport offers a range of transportation services to meet the diverse needs of its clients in the Stockton area.

Impact of capping on pyrite oxidation ion transport in

2024年3月26日 Request PDF Impact of capping on pyrite oxidation ion transport in unsaturated mine waste pile: A hydrogeochemical modeling study The present study employs a hydrogeochemical model to ...

Pyrite and the Origins of Civilization Pyrite: A Natural History of ...

pyrite is an often-overlooked material today although it has been instrumental in enabling many aspects of our modern culture and industry. This bright, brassy mineral is the most abundant metal sulfide in the Earth’s crust and provides a marked chemical contrast to the duller silicates and oxides that constitute most rocks.

Interfacial adsorption of gold nanoparticles on arsenian pyrite:

2023年12月5日 Interfacial adsorption of gold nanoparticles on arsenian pyrite: New insights for the transport and deposition of gold ... Pyrite and arsenian pyrite are the common gold-bearing ... (DAD) at a wavelength of 215 nm and a Zorbax SB-aq (3 × 100 mm, 1.8 μm) (Agilent) C18 reverse phase column. The mobile phase was a H 3 PO 4 ...

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Hydrogeochemical modelling of pyrite oxidation ion mobility in ...

2024年2月9日 The present study is aimed to formulate a numerical model to simulate hydrogeochemical reactions controlling pyrite oxidation in unsaturated aquifers under non-uniform flow conditions. A coupled flow and multi-component transport model is solved using a finite difference scheme to simulate the concentration distribution of oxygen (O2), ferrous

(PDF) Charge Carrier Transport in Iron Pyrite Thin Films: Disorder ...

2021年6月15日 Charge Carrier Transport in Iron Pyrite Thin Films: Disorder Induced Variable Range . Hopping . Sudhanshu Shukla, Sinu Mathews, Hwan Sung Choe, Manjusha Chugh, Thomas D. Kühne,

RESEARCH ARTICLE Cadmium and lead distribution in pyrite ores ...

RESEARCH ARTICLE Cadmium and lead distribution in pyrite ores: Environmental concerns over geochemically mobile fractions Jielong Cao1, Shixing Ren1, Chunlin Wang1, Jingye She1,Yanjun Jiang1,Yanyi ...

p‐type conduction in pyrite single crystals prepared by chemical ...

1993年4月26日 Pyrite (FeS2) single crystals have been prepared by chemical vapor transport from the elements, using additional phosphorus as a possible dopant source. Hall as well as thermoprobe measurements clearly indicated p‐type conduction. Carrier concentrations of between 1 and 8×1018 cm−3 and Hall mobilities of 0.42–0.76 cm2/V s were deduced.

Optical and Electrical Transport Evaluations of n

Iron pyrite [cubic FeS2 (cFeS2)] is considered as an earth-abundant and low-cost thin-film photovoltaic material. However, the conversion efficiency of cFeS2-based solar cells remains below 3%. To elucidate this limitation, we evaluate

Deep abiotic weathering of pyrite Science

2020年10月23日 In addition, several researchers have documented cases where pyrite oxidizes to a depth of meters in pyrite-rich black shales (31–34), pyrite-poor shales (30, 35–38), and crystalline rocks . Although pyrite has

A statistical model to relate pyrite oxidation and oxygen transport ...

2013年10月18日 This paper presents a statistical model for predicting pyrite fraction remaining in a coal waste pile at the Alborz Sharghi coal mine located at northeast of Iran. This model calculates the fraction of pyrite remaining using mole fraction of oxygen diffused into the pore spaces of the pile and the pile depth. Comparison of the statistical outputs revealed that a

A hydrogeochemical transport model for an oxidation experiment

1998年3月1日 The oxidation of pyrite triggers dissolution of calcite, cation and proton exchange, and CO 2 sorption. The composition of the column effluent was modeled with PHREEQC, a hydrogeochemical transport model. The model was extended with a formal ID transport module which includes dispersion and diffusion.

Synthesis, Characterization, and Variable Range Hopping Transport

2013年1月28日 Field effect transport measurements showed that these pyrite nanostructures appear to behave as a moderately p-doped semiconductor with an average resistivity of 2.19 ± 1.21 Ωcm, an improved hole mobility of 0.2 cm2 V–1 s–1, and a lower carrier concentration on the order of 1018–1019 cm–3 compared with previous reported pyrite nanowires.

Pyrite: A Natural History of Fool's Gold - Oxford Academic

In this chapter I show how pyrite was at the heart of our early understanding of the composition of substances and ... Mobile Enter search term. Subject. Arts and Humanities. Browse content in Arts and Humanities; Archaeology. Browse content in Archaeology; Anglo-Saxon and ... Transport Technology and Trades. Environmental ...

Stability, Structure, and Electronic Properties of the Pyrite ...

2017年3月22日 Pyrite is the most common sulfide in the Earth. In the presence of arsenopyrite its oxidation is delayed, and instead, the arsenopyrite increases its oxidation rate, releasing As(III) and As(V) species in the medium. DFT/plane waves calculations were performed on pyrite/arsenopyrite interface models to understand the stability, structure, and electronic

Development of a Fully Coupled Biogeochemical Reactive Transport

2018年10月29日 Key processes in our reactive transport model include (i) growth and decay of microorganisms; (ii) attachment and detachment of microorganisms to the soil surface, having a mobile (suspended in the water phase) and immobile (attached to the soil) pool of microorganisms; (iii) both heterotrophic (oxidation of sedimentary organic carbon (SOC)) and

TRL THE FUTURE OF TRANSPORT

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