Results 201 to 210 of about 50,853 (257)

Study on Pyrite (Part 2) : On the Electrical Properties of Pyrite

The Journal of the Geological Society of Japan, 1952
Ryohei Otsuka, Kitaro Hayase
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Novel microorganism for selective separation of coal from ash and pyrite; First quarterly technical progress report, September 1, 1993--November 30, 1993

, 1993
M. Misra, Ross Smith, Ashok M. Raichur
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High-Performance Self-Cascade Pyrite Nanozymes for Apoptosis-Ferroptosis Synergistic Tumor Therapy.

ACS Nano, 2021
As next-generation artificial enzymes, nanozymes have shown great promise for tumor catalytic therapy. In particular, their peroxidase-like activity has been employed to catalyze hydrogen peroxide (H2O2) to produce highly toxic hydroxyl radicals (•OH) to
Xiangqin Meng, Dandan Li, Lei Chen, H. He, Qian Wang, Chaoyi Hong, Jiuyang He, Xingfa Gao, Yili Yang, B. Jiang, Guohui Nie, Xiyun Yan, Lizeng Gao, Kelong Fan   +13 more
semanticscholar   +1 more source

Corncob-pyrite bioretention system for enhanced dissolved nutrient treatment: Carbon source release and mixotrophic denitrification.

Chemosphere, 2022
Solid biomass waste amendment and substrates modification in bioretention systems have been increasingly used to achieve effective dissolved nutrients pollution control in stormwater runoff.
Zhongshuai Weng, Haiyuan Ma, Jingchen Ma, Zheng-hong Kong, Zhiyu Shao, Yunsong Yuan, Yanhong Xu, Qichang Ni, H. Chai   +8 more
semanticscholar   +1 more source

Redox Behavior of Secondary Solid Iron Species and the Corresponding Effects on Hydroxyl Radical Generation during the Pyrite Oxidation Process.

Environmental Science and Technology, 2022
During the pyrite oxidation process, aqueous ferrous/ferric ions (Fe2+/Fe3+), as well as surface-adsorbed Fe2+/Fe3+, have been widely recognized to dominate hydroxyl radical (•OH) generation, while this study reveals that the secondary solid iron species
Zhenyu Zhao, Shuai Peng, Canming Ma, Chao Yu, Deli Wu   +4 more
semanticscholar   +1 more source

The metamorphism of pyrite and pyritic ores: an overview [PDF]

Mineralogical Magazine, 1993
AbstractPyrite, the most widespread and abundant of sulphide minerals in the Earth's surficial rocks, commonly constitutes the primary opaque phase in ore deposits. Consequently, an understanding of the behaviour of pyrite and its relationships with coexisting phases during the metamorphism of pyritebearing rocks is vital to the interpretation of their
Frank M. Vokes, James R. Craig
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Decoupling of Au and As during rapid pyrite crystallization

Geology, 2021
Gold (Au) is largely hosted by pyrite in a variety of hydrothermal systems, but the incorporation of Au into pyrite under disequilibrium conditions remains poorly understood.
Yafei Wu, K. Evans, Si-Yu Hu, D. Fougerouse, Mei‐Fu Zhou, L. Fisher, P. Guagliardo, Jian-wei Li   +7 more
semanticscholar   +1 more source

Anaerobic Neutrophilic Pyrite Oxidation by a Chemolithoautotrophic Nitrate-Reducing Iron(II)-Oxidizing Culture Enriched from a Fractured Aquifer.

Environmental Science and Technology, 2021
Neutrophilic microbial pyrite (FeS2) oxidation coupled to denitrification is thought to be an important natural nitrate attenuation pathway in nitrate-contaminated aquifers.
N. Jakus, A. Mellage, C. Höschen, M. Maisch, J. Byrne, C. Mueller, P. Grathwohl, A. Kappler   +7 more
semanticscholar   +1 more source

Pyrite geochemistry and its implications on Au-Cu skarn metallogeny: An example from the Jiguanzui deposit, Eastern China

American Mineralogist, 2021
Trace element geochemistry of pyrite is widely used to monitor ore-forming processes of various types of deposits, but its application to skarn mineral systems is not well constrained due to the multi-stage nature and complex associated mineral ...
Yu Zhang, Huayong Chen, Jiamin Cheng, Jingquan Tian, Lejun Zhang, P. Olin   +5 more
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EVOLUTION OF INVISIBLE Au IN ARSENIAN PYRITE IN CARLIN-TYPE Au DEPOSITS

, 2021
A significant characteristic distinguishing Carlin-type Au deposits from other Au deposits is the abundance of invisible Au in arsenian pyrite. Gold occurs primarily as ionic Au1+ in arsenian pyrite and is unstable during subsequent thermal events.
Q. Liang, Zhuojun Xie, Xie‐Yan Song, R. Wirth, Yong Xia, J. Cline   +5 more
semanticscholar   +1 more source