Results 241 to 250 of about 87,639 (320)

Photon-induced redox chemistry on pyrite promotes photoaging of polystyrene microplastics.

Science of the Total Environment, 2022
The mineral particles in sediment could affect polystyrene microplastics (PS-MPs) prosperity through physical and chemical interactions. Pyrite with semiconducting properties is the most abundant metal sulfide mineral in the sediments of lake and river ...
Xue Bai, Weishi Ma, Qian Zhang, Li-Shan Zhang, Shan Zhong, Xiaohua Shu   +5 more
semanticscholar   +1 more source

Sulphur vacancy derived anaerobic hydroxyl radical generation at the pyrite-water interface: Pollutants removal and pyrite self-oxidation behavior

, 2021
We demonstrate that FeS2 possessing sulfur vacancies (SVs), under anaerobic water environment, can stabilize the H2O adsorption with a strong exothermic effect to compensate the apparent energy barrier of H2O oxidation on pyrite surface.
Cancan Ling, Xiufan Liu, Mei-Qi Li, Xiaobing Wang, Yanbiao Shi, Jing Qi, Jin-Cai Zhao, Lizhi Zhang   +7 more
semanticscholar   +1 more source

The metamorphism of pyrite and pyritic ores: an overview

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
James R. Craig, Frank M. Vokes
openaire   +1 more source

Deep abiotic weathering of pyrite

Science, 2020
Getting rid of fool's gold Pyrite, also called fool's gold, is an iron sulfide mineral that is very commonly found in rock but is almost nonexistent in sediments today.
Xin Gu, P. Heaney, F. A. A. Aarão Reis, S. Brantley   +3 more
semanticscholar   +1 more source

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.
Ya-Fei Wu, K. Evans, Si-Yu Hu, D. Fougerouse, Mei-Fu Zhou, L. Fisher, P. Guagliardo, Jian-Wei Li   +7 more
semanticscholar   +1 more source

Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments.

Environmental Science and Technology
Pharmaceutical residues in sediments are concerning as ubiquitous emerging contaminants. Pyrite is the most abundant sulfide minerals in the estuarine and coastal sediments, making it a major sink for pharmaceutical pollutants such as sulfamethoxazole ...
Lijun Zhu, Huan Wang, Jian Sun, Lu Lu, Shaofeng Li   +4 more
semanticscholar   +1 more source

Natural pyrite to enhance simultaneous long-term nitrogen and phosphorus removal in constructed wetland: Three years of pilot study.

Water Research, 2019
The searches for suitable substrates with high capacity for phosphorus (P) removal and promoting denitrification for enhancing nitrogen (N) removal have been a key work in constructed wetlands (CWs) research in the past several decades.
Zhibin Ge, Dong-Yang Wei, Jing Zhang, Junsong Hu, Zhuo Liu, Ruihua Li   +5 more
semanticscholar   +1 more source

Pyrogallic acid as depressant for flotation separation of pyrite from chalcopyrite under low-alkalinity conditions

Separation and Purification Technology, 2021
Effective and low-cost flotation separation of chalcopyrite and pyrite has always been a challenge in the minerals processing industry. Traditional depressants in a Cu–Fe sulfide flotation system, such as lime, tend to require a high dosage and have low ...
Guang Han, S. Wen, Han Wang, Qi-Cheng Feng, Xu Bai   +4 more
semanticscholar   +1 more source

LA-ICP-MS trace element analysis of pyrite from the Dafang gold deposit, South China: Implications for ore genesis

Ore Geology Reviews, 2021
The Dafang is a hydrothermal gold deposit (6 t Au with an average grade of 1.8 g/t) in periphery of the Sn-Cu metallogenic system in Nanling Range in south China.
Kexin Wang, D. Zhai, Jia-Jun Liu, Hang Wu   +3 more
semanticscholar   +1 more source

A green solar photo-Fenton process for the degradation of carbamazepine using natural pyrite and organic acid with in-situ generated H2O2.

Science of the Total Environment, 2021
Pyrite is widely used in Fenton reaction for degradation of pollutants and exhibits great potential for environmental remediation, however, its efficiency is greatly compromised by extra H2O2 and pH adjustment.
Qian Guo, Wen-Jie Zhu, Dao-Li Yang, Xi Wang, Yinghao Li, Chao Gong, Jia-Li Yan, Jinli Zhai, Xiao-Ya Gao, Yong-Ming Luo   +9 more
semanticscholar   +1 more source