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Fe/N ratio 1

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Adsorption of fluoride on clay minerals and their mechanisms using X-ray photoelectron spectroscopy

Junyi DU, Daishe WU, Huayun XIAO, Ping LI

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 212-226 doi: 10.1007/s11783-010-0255-5

Abstract: This research investigates the adsorption mechanisms of fluoride (F) on four clay minerals (kaoliniteconcentrations ( = 5–1000 mg·L ), the amount of F adsorbed ( ), amount of hydroxide released by clay mineralsAt <5–100 mg·L , clay minerals adsorb H to protonate aluminum-bound surface-active hydroxyl sites inAt >100 mg·L , new minerals precipitate and the product depends on the critical Al concentration.At low (0.3–1.5 mg·L ), proton transfer occurs, and the F adsorption capabilities of the clay minerals

Keywords： clay mineral     fluoride (F)     adsorption mechanism     X-ray photoelectron spectroscopy (XPS)    

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Characteristics and Exploitation of Rare Earth,Rare Metal and Rare-Scattered Element Minerals in China

Wang Denghong, Sun Yan, Dai Hongzhang, Guo Weiming, Zhao Zhi, Zhao Ting,Li Jiankang, Wang Chenghui, Huang Fan, Yu Yang, Li Dexian

Strategic Study of CAE 2019, Volume 21, Issue 1,   Pages 119-127 doi: 10.15302/J-SSCAE-2019.01.017

Abstract: style="text-align: justify;">China is rich in rear earth, rear metal, and rare-scattered element (RRR) mineralsChina has entered a critical period where technological innovation drives social development, the RRR mineralsIn this paper, based on the data accumulated during the investigation and prospecting of the RRR mineralssince 2011, we briefly summarize the main characteristics of the RRR minerals, propose some suggestions

Keywords： rare earth     rear metal     and rare-scattered element minerals     resource characteristics     exploitation    

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Will Massive Appetite for Minerals Stall Clean Energy Transition?

Mitch Leslie

Engineering 2023, Volume 31, Issue 12,   Pages 8-10 doi: 10.1016/j.eng.2023.11.001

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High-Quality Development Strategy for the Supply Chain of Critical Minerals and Its Material Industry

Gan Yong , Peng Suping , Mao Jingwen , Pei Rongfu , Li Zhongping , Tu Hailing , Sun Chuanyao , Chen Qishen , Xie Man , Zheng Wenjiang

Strategic Study of CAE 2022, Volume 24, Issue 3,   Pages 1-9 doi: 10.15302/J-SSCAE-2022.03.001

Abstract:

Critical minerals and materials are fundamental to national economy,the material industry and analyzes the strategic needs and development status of China’s key mineralsMoreover, problems are summarized including blocked industrial chain; insufficient supply of key mineralsFurthermore, we propose suggestions for the high-quality development of China’s key minerals and

Keywords： critical minerals     materials     entire industrial chain     supply chain     high-quality development     recycling    

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Influence of Grinding Environment on Flotation of Sulfide Minerals

He Fayu,Sun Chuanyao,Song Lei

Strategic Study of CAE 2006, Volume 8, Issue 8,   Pages 92-102

Abstract: surface morphology and property, the chemical property of pulp and its flotation behavior of sulfide mineralsDuring grinding of sulfide minerals, the factors of mechanics, electrochemistry, and mechano-chemistrysurface morphology and property, the chemical property of pulp and the flotation behavior of sulfide mineralsmedium, adding reagents into the mill and so on can improve separation effect of flotation of sulfide minerals

Keywords： sulfide mineral     grinding environment     flotation    

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The performance of nitrate-reducing Fe(II) oxidation processes under variable initial Fe/N ratios: The fate of nitrogen and iron species

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1366-2

Abstract:

•Bacterially-mediated coupled N and Fe processes examined in incubation experiments.

Keywords： Denitrification     N2O emission     Fe(II) oxidation     Fe/N ratio     Fe minerals    

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Development of High-Pressure Multigrain X-Ray Diffraction for Exploring the Earth’s Interior Review

Li Zhang, Hongsheng Yuan, Yue Meng, Ho-kwang Mao

Engineering 2019, Volume 5, Issue 3,   Pages 441-447 doi: 10.1016/j.eng.2019.02.004

Abstract:

The lower mantle makes up more than a half of our planet’s volume. Mineralogical and petrological experiments on realistic bulk compositions under high pressure–temperature (P–T) conditions are essential for understanding deep mantle processes. Such high P–T experiments are commonly conducted in a laser-heated diamond anvil cell, producing a multiphase assemblage consisting of 100 nm to submicron crystallite grains. The structures of these lower mantle phases often cannot be preserved upon pressure quenching; thus, in situ characterization is needed. The X-ray diffraction (XRD) pattern of such a multiphase assemblage usually displays a mixture of diffraction spots and rings as a result of the coarse grain size relative to the small X-ray beam size (3–5 μm) available at the synchrotron facilities. Severe peak overlapping from multiple phases renders the powder XRD method inadequate for indexing new phases and minor phases. Consequently, structure determination of new phases in a high P–T multiphase assemblage has been extremely difficult using conventional XRD techniques. Our recent development of multigrain XRD in high-pressure research has enabled the indexation of hundreds of individual crystallite grains simultaneously through the determination of crystallographic orientations for these individual grains. Once indexation is achieved, each grain can be treated as a single crystal. The combined crystallographic information from individual grains can be used to determine the crystal structures of new phases and minor phases simultaneously in a multiphase system. With this new development, we have opened up a new area of crystallography under the high P–T conditions of the deep lower mantle. This paper explains key challenges in studying multiphase systems and demonstrates the unique capabilities of high-pressure multigrain XRD through successful examples of its applications.

Keywords： High pressure     Synchrotron X-ray     Multigrain     Diamond anvil cell     Minerals     Petrology     Earth’s interior    

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Scientific and Engineering Progress in CO2 Mineralization Using Industrial Waste and Natural Minerals Article

Heping Xie, Hairong Yue, Jiahua Zhu, Bin Liang, Chun Li, Yufei Wang, Lingzhi Xie, Xiangge Zhou

Engineering 2015, Volume 1, Issue 1,   Pages 150-157 doi: 10.15302/J-ENG-2015017

Abstract: The latest advances in CO2 mineralization technology involving natural minerals and industrial

Keywords： CO2 mineralization     natural mineral     industrial waste     science and engineering    

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Current Status and Development Direction of Deep-Sea Mineral Resource Exploitation Equipment

Wang Guorong , Huang Zeqi , Zhou Shouwei , Fu Qiang , Zhong Lin , Guo Xincheng , Zhu Dan , Liang Dongmei , Huang Chunhai

Strategic Study of CAE 2023, Volume 25, Issue 3,   Pages 1-12 doi: 10.15302/J-SSCAE-2023.03.001

Abstract: and upgrade of domestically produced equipment to promote the commercialized mining of deep-sea minerals

Keywords： deep-sea minerals     deep-sea resource exploration     pipeline lift mining system     subsea mining vehicles    

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Title Author Date Type Operation

Adsorption of fluoride on clay minerals and their mechanisms using X-ray photoelectron spectroscopy

Junyi DU, Daishe WU, Huayun XIAO, Ping LI

Journal Article

Characteristics and Exploitation of Rare Earth,Rare Metal and Rare-Scattered Element Minerals in China

Wang Denghong, Sun Yan, Dai Hongzhang, Guo Weiming, Zhao Zhi, Zhao Ting,Li Jiankang, Wang Chenghui, Huang Fan, Yu Yang, Li Dexian

Journal Article

Will Massive Appetite for Minerals Stall Clean Energy Transition?

Mitch Leslie

Journal Article

High-Quality Development Strategy for the Supply Chain of Critical Minerals and Its Material Industry

Gan Yong , Peng Suping , Mao Jingwen , Pei Rongfu , Li Zhongping , Tu Hailing , Sun Chuanyao , Chen Qishen , Xie Man , Zheng Wenjiang

Journal Article

Influence of Grinding Environment on Flotation of Sulfide Minerals

He Fayu,Sun Chuanyao,Song Lei

Journal Article

The performance of nitrate-reducing Fe(II) oxidation processes under variable initial Fe/N ratios: The fate of nitrogen and iron species

Journal Article

Development of High-Pressure Multigrain X-Ray Diffraction for Exploring the Earth’s Interior

Li Zhang, Hongsheng Yuan, Yue Meng, Ho-kwang Mao

Journal Article

Scientific and Engineering Progress in CO2 Mineralization Using Industrial Waste and Natural Minerals

Heping Xie, Hairong Yue, Jiahua Zhu, Bin Liang, Chun Li, Yufei Wang, Lingzhi Xie, Xiangge Zhou

Journal Article

Current Status and Development Direction of Deep-Sea Mineral Resource Exploitation Equipment

Wang Guorong , Huang Zeqi , Zhou Shouwei , Fu Qiang , Zhong Lin , Guo Xincheng , Zhu Dan , Liang Dongmei , Huang Chunhai

Journal Article