Results 51 to 60 of about 31,485 (279)

Peroxodisulfate‐Enhanced Leaching of Deep‐Sea Manganese Crusts and Sulfides

Chemie Ingenieur Technik, EarlyView.
Ammonium peroxodisulfate enables efficient leaching of deep‐sea manganese crusts and massive sulfides while offering electrolytic recycling. High leaching yields for V, Mn, Co, Mo, Sn, and W, along with complete leaching of As and Sb, highlight its potential as a powerful and sustainable oxidant for marine resource processing.
Bastian Hansel, Lucas Thumeyer, Ebbe H. Hartz, Håvard Hallås Stubseid, Peter Fröhlich, Martin Bertau   +5 more
wiley   +1 more source

Study on Water Wettability Mechanism of Pyrite and Coal Surfaces Based on Density Functional Theory

Kuangchan zonghe liyong, 2022
Flotation is based on the difference of wettability of mineral surfaces. In order to study the water wettability mechanism of pyrite and coal surfaces, pyrite and perfect coal surface models were constructed. The adsorptions of water and oxygen molecules
Chengyong Wang, Peng Chen, Jinlong Tan, Yongcheng Fang   +3 more
doaj   +1 more source

Obtenção dos parâmetros cinéticos da reação da decomposição e oxidação térmica da pirita [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2013.O carvão é uma das maiores fontes de energia não renovável do pais.
Concer, Paula Hahn
core  

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Estudo da atividade catalítica da pirita no processo de liquefação direta do carvão [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-graduação em Engenharia Química, Florianópolis, 2013Este trabalho descreve o estudo da liquefação direta do carvão catarinense, empregando sulfeto ...
Santos, Felipe Gomes
core  

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

Coupled biogeochemical dynamics of nitrogen and sulfur in a sandy aquifer and implications for groundwater quality [PDF]

, 2012
Groundwater is an essential resource for humans and its quality is often threatened by leaching of contaminants from surface soils. In agricultural areas, nitrate from fertilizer or manure is one of the most common pollutants.
Denetrification coupled with pyrite oxidation in groundwater systems, Geochemistry, Zhang, Y.-C.   +2 more
core  

Re-Os pyrite geochronology of Zn-Pb mineralization in the giant Caixiashan deposit, NW China [PDF]

, 2016
The newly discovered Caixiashan Irish-type Zn-Pb deposit (similar to 131 Mt at 3.95 % Zn + Pb), located in the Eastern Tianshan of Xinjiang, is one of the largest Zn-Pb deposits in NW China.
Fang, Jing, Lu, Wanjian, Zhang, Li, Li, Jie, Mi, Mei, Hollings, Pete, Wang, Chengming, Li, Dengfeng, Chen, Huayong   +8 more
core   +1 more source

Uniaxial compressive strength prediction and ratio parameter optimization of titanium tailings composite backfill materials using intelligent hybrid models

Deep Underground Science and Engineering, EarlyView.
Based on the 90 datasets, ERT and four optimization algorithms were used to build four hybrid models to predict the UCS of the backfill body. The SMA‐ERT model was the most effective model, and it can reliably guide the design of the backfill ratio parameters. Abstract This study analyzed the feasibility of using titanium (Ti) tailings as a backfilling
Weijun Liu, Zida Liu, Zhixiang Liu
wiley   +1 more source

The effect of adsorbed lipid on pyrite oxidation under biotic conditions

Geochemical Transactions, 2006
The chemolithoautotrophic bacterium, Acidithiobacillus ferrooxidans, commonly occurs in acid mine drainage (AMD) environments where it is responsible for catalyzing the oxidation of pyrite and concomitant development of acidic conditions.
Strongin Daniel R, Lim Eelin, Cleveland Curtis, Hao Jun, Schoonen Martin AA   +4 more
doaj   +1 more source