☆ 4.7 Article

Evaluation of adsorption differences of DL-cysteine on sphalerite surfaces with different degrees of iron substitution: Experimental and DFT studies

MINERALS ENGINEERING (2023)

相关参考文献

注意：仅列出部分参考文献，下载原文获取全部文献信息。

Article Chemistry, Physical

Evaluation of the difference in adsorption of sodium alginate as an efficient and non-toxic arsenopyrite depressant on the surface of arsenopyrite and chalcopyrite

Hongxin Qiu et al.

Summary: In this study, sodium alginate combined with potassium permanganate was used as a selective depressant to separate chalcopyrite and arsenopyrite. The results showed that sodium alginate was more easily adsorbed on the arsenopyrite surface after potassium permanganate pretreatment. The adsorption of sodium alginate on the mineral surfaces was dominated by chemisorption.

APPLIED SURFACE SCIENCE (2023)

添加到收藏夹

Article Materials Science, Multidisciplinary

Comparison of adsorption capacity of water and hydroxide with collector reagents on geversite (PtSb2) mineral surface: A DFT-D insights

Samuel S. Mangwejane et al.

Summary: The study used DFT-D method to investigate the adsorption capacity and bonding behavior of water, hydroxide, and organic collectors on the PtSb2(100) surface. The results showed that OH- had greater ability to interact with the surface compared to H2O. Among the collectors, BDTC exhibited the strongest adsorption energy. The study also highlighted the importance of operating at low pH for the flotation of PtSb2 mineral.

COMPUTATIONAL MATERIALS SCIENCE (2023)

添加到收藏夹

Article Chemistry, Physical

Nitrobenzoate as a flotation depressant for arsenopyrite: A theoretical study of the structure-reactivity relationship

Hongxin Qiu et al.

Summary: By employing density functional theory calculations, this study investigates the structure-reactivity relationship of nitrobenzoate as a flotation depressant for arsenopyrite. The results reveal that O/N heteroatoms play a significant role in the formation of chemical bonds with the metal atoms on the mineral surface, and the reactivity follows the order of m-nitrobenzoate > p-nitrobenzoate > o-nitrobenzoate. Experimental flotation tests further confirm this order. Additionally, the reactive sites of the three nitrobenzoate isomers are examined, showing that they have the same reactive sites but interact differently with the metal atoms.

JOURNAL OF MOLECULAR LIQUIDS (2023)

添加到收藏夹

Article Engineering, Chemical

Selective depression of marmatite by sodium alginate in flotation separation of galena and marmatite

Hongxin Qiu et al.

Summary: In this study, sodium alginate (SA) is proposed as an effective green depressant for the selective separation of galena and marmatite. The results showed that the addition of SA before sodium butyl xanthate (SBX) at pH = 11 can selectively depress the flotation of marmatite. SA was found to be selectively adsorbed on the marmatite surface, hindering the subsequent adsorption of the collector and affecting its flotation. The strong adsorption of SA on the marmatite surface was due to its π-backbonding with Fe2+, the active site on the marmatite surface.

MINERALS ENGINEERING (2023)

添加到收藏夹

Article Materials Science, Multidisciplinary

Effect of NaCN:ZnSO4 Mixture Molar Ratio and Particle-Size Distribution on Pb-Zn and Fe Selective Separation by Froth Flotation

Ramon Arellano-Pina et al.

Summary: This study examines the depression of sphalerite and pyrite with a NaCN:ZnSO4 mixture in separating Pb-Zn, enriched with Ag, by flotation. The optimal conditions were a 10:1 mixture molar ratio and coarse-size-particle distribution, leading to a successful separation with a lead recovery of 83.70%. Wettability measurements and thermodynamic analysis indicated that cyanide species selectively depressed pyrite and sphalerite, favoring galena floatability.

JOM (2022)

添加到收藏夹

Article Engineering, Chemical

DFT study of the occurrence state of In and the correlation of In and Fe in sphalerite

Xi Yang et al.

Summary: This study investigates the occurrence and relationship of indium (In) and iron (Fe) in sphalerite, as well as their effects on the crystal and electronic structure of sphalerite using density functional theory (DFT) calculations. The results show that In can be incorporated into sphalerite by substituting Zn, and the presence of Fe promotes this incorporation. The presence of Fe also enhances the formation of In-S bonds in sphalerite and leads to a more stable crystal structure. The band structure calculations reveal that the impurity levels in the band gap are mainly contributed by the In 5s and Fe 3d orbitals. Spin-polarized calculations suggest that In-Fe sphalerite exhibits a half-metallic ferromagnetic property.

MINERALS ENGINEERING (2022)

添加到收藏夹

Article Engineering, Chemical

Orbital symmetry matching study on the interactions of flotation reagents with mineral surfaces

Jianhua Chen et al.

Summary: The selectivity of reagents to minerals is crucial, but the mechanism behind it is not fully understood. This study used density functional theory calculations to investigate the orbital symmetry matching between flotation reagents and metal ions on mineral surfaces. The results show that the symmetry matching plays a significant role in determining the collecting ability of the reagents.

MINERALS ENGINEERING (2022)

添加到收藏夹

Article Metallurgy & Metallurgical Engineering

Effects of copper ions on dissolution mechanism of marmatite

Xiao-yu Meng et al.

Summary: The dissolution mechanism of marmatite in the presence of Cu2+ was studied using experiments and density functional theory (DFT) calculations. The experiments showed that Cu2+ accelerated marmatite dissolution at high temperatures and reversed the trend at low temperatures. DFT calculations further verified the proposed mechanism by showing that the energy of the substitution reaction was more negative than that of the adsorption reaction at high temperatures.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2022)

添加到收藏夹

Article Engineering, Chemical

Ore mineral characteristics as rate-limiting factors in sphalerite flotation: Comparison of the mineral chemistry (iron and manganese content), grain size, and liberation

Glacialle Tiu et al.

Summary: A QEMSCAN (R) study was conducted to investigate the distribution of sphalerite grains with different iron and manganese content during a multi-stage Zn-Pb-Cu flotation process. The study aimed to understand the effect of sphalerite chemistry on grain size and liberation. The results showed that physical factors, such as grain size and liberation, had a more significant impact on sphalerite flotation than the presence of iron and manganese.

MINERALS ENGINEERING (2022)

添加到收藏夹

Article Geochemistry & Geophysics

An Investigation into the Effects of Grinding Medium on Interface Characteristics and Flotation Performance of Sphalerite in Cyanide System

Qianfei Zhao et al.

Summary: The strong contamination of the interface is the main problem leading to low flotation efficiency of sphalerite in cyanide tailings. The use of ceramic ball medium reduces the consumption of cyanide and dissolved oxygen, as well as the concentration of ions. SEM-EDS analysis shows that the ceramic ball medium prevents excessive surface oxidation caused by galvanic couple actions, and XPS analysis confirms the optimized chemical environment on the surface of sphalerite with porcelain ball medium. Grinding with ceramic ball medium exhibits excellent performance in the cyanide process, resulting in approximately 5-10% higher flotation efficiency compared to grinding with iron ball media.

MINERALS (2022)

添加到收藏夹

Article Chemistry, Physical

Interactions of xanthates of increasing chain length with pyrite surfaces: A DFT-D and microcalorimetry study

Belinda. McFadzean et al.

APPLIED SURFACE SCIENCE (2022)

添加到收藏夹

Article

Mineralogy, fluid evolution, geochemical characteristics in two types of sphalerite and genesis of the Tarz Zn–Pb deposit, Iran

Balandeh Aminzadeh

Arabian Journal of Geosciences (2021)

添加到收藏夹

Article Engineering, Chemical

Study on the depression mechanism of calcium on the flotation of high-iron sphalerite under a high-alkalinity environment

Shengdong Zhang et al.

Summary: This study investigates the effects of iron content and calcium presence on the flotation depression of iron-bearing sphalerite under high alkalinity conditions. The results show that increasing iron content or the presence of calcium leads to increased depression in flotation, reduced adsorption of copper and xanthate, and increased adsorption of metal hydroxides and calcium on the surface of iron-bearing sphalerite. TOF-SIMS results confirm the trend of calcium adsorption at the atomic level, while DFT calculations show lower adsorption energy of CaOH+ on iron-substituted sphalerite surfaces. Overall, increased adsorption of hydroxides and calcium significantly hinder the adsorption of copper and xanthate, ultimately leading to increased flotation depression of high-iron sphalerite with increasing iron content.

MINERALS ENGINEERING (2021)

添加到收藏夹

Article Engineering, Environmental

Mineralogical phase transformation of Fe containing sphalerite at acidic environments in the presence of Cu2+

Yisheng Zhang et al.

Summary: The study found a possible phase transition from sphalerite to chalcopyrite in acidic cupric ions solution, where the cupric ions can selectively replace zinc in marmatite lattices and diffuse into the matrix, forming a strong correlation with pH value variations. This clarifies the action mechanism of cupric ions on sphalerite dissolution in acidic environments.

JOURNAL OF HAZARDOUS MATERIALS (2021)

添加到收藏夹

Article Chemistry, Analytical

Simultaneous determination of DL-cysteine, DL-homocysteine, and glutathione in saliva and urine by UHPLC-Q-Orbitrap HRMS: Application to studies of oxidative stress

Qingkun Ma et al.

Summary: A high-sensitivity and -selectivity mass spectrometry derivatization reagent, NCS-OTPP, was developed for enantiomeric separation of chiral thiol compounds. Complete separation of GSH, DL-Cys, and DL-Hcy was achieved, with good linear relationships, precision, and recoveries. The thiol compounds were quantitatively related to oxidative stress state changes in saliva and urine.

JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS (2021)

添加到收藏夹

Article Engineering, Chemical

Steric hindrance effect on adsorption of xanthate on sphalerite surface: A DFT study

Ye Chen et al.

Summary: The study investigated the influence of steric hindrance effect on xanthate adsorption on sphalerite surface using DFT, revealing that the spatial hindrance caused by sulfur atoms leads to steric hindrance effect. The replacement of surface zinc atoms with copper atoms was found to decrease the energy barrier caused by steric hindrance, facilitating xanthate adsorption.

MINERALS ENGINEERING (2021)

添加到收藏夹

Article Chemistry, Physical

Adsorption of DTC-CTS on sphalerite (110) and Cu-activated sphalerite (110) surfaces: A DFT study

Wenchao Dong et al.

Summary: Density functional theory was utilized to study the adsorption of DTC-CTS on different surfaces, revealing that adsorption on Cu-activated sphalerite surface is easier and more stable.

APPLIED SURFACE SCIENCE (2021)

添加到收藏夹

Article Engineering, Chemical

The interaction of flotation reagents with metal ions in mineral surfaces: A perspective from coordination chemistry

Jianhua Chen

Summary: This paper proposes a perspective from coordination chemistry to clarify the interaction mechanism of reagents with mineral surfaces, introducing the 7C-backbonding model and emphasizing the crucial role of unoccupied orbitals in the selectivity of depressants.

MINERALS ENGINEERING (2021)

添加到收藏夹

Article Geology

Trace-element systematics and isotopic characteristics of sphalerite-pyrite from volcanogenic massive sulfide deposits of Betul belt, central Indian Tectonic Zone: Insight of ore genesis to exploration

Bishnu Prasad Mishra et al.

Summary: The study focuses on the volcanogenic massive sulfide deposits in the Betul belt of central India, known for their low-grade zinc-copper-lead mineralization. Analysis of trace elements in sphalerite and pyrite from drill core samples provides insights into ore-forming temperature, ore genesis, and exploration prospects. The research highlights the geochemical variations and processes involved in the formation of Zn-Cu and Zn-Cu-Pb mineralization in the region.

ORE GEOLOGY REVIEWS (2021)

添加到收藏夹

Article Metallurgy & Metallurgical Engineering

Selective depression of copper-activated sphalerite by polyaspartic acid during chalcopyrite flotation

Qian Wei et al.

Summary: The study demonstrates the potential selective depressant role of PAPA in the flotation separation of chalcopyrite and Cu-activated sphalerite, revealing its depression mechanism through contact angle, Zeta potential, FT-IR, and ICP measurements. PAPA selectively depresses Cu-activated sphalerite while remaining floatable chalcopyrite, with excellent complexing ability with Cu2+ and prevention of further sodium diethyl dithiocarbamate (DDTC) adsorption on the sphalerite surface, leading to selective depression and high recovery in flotation tests of artificially mixed minerals.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2021)

添加到收藏夹

Article Engineering, Chemical

Effect of surface oxidation on the depression of sphalerite by locust bean gum

Bo Feng et al.

MINERALS ENGINEERING (2020)

添加到收藏夹

Article Engineering, Chemical

Influences of electronic spin structures on the magnetic properties of Fe, Co and Ni ions and the adsorption of collectors

Jianhua Chen et al.

MINERALS ENGINEERING (2020)

添加到收藏夹

Article Chemistry, Physical

Selective depression of talc in chalcopyrite flotation by xanthan gum: Flotation response and adsorption mechanism

Guangjiu Pan et al.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2020)

添加到收藏夹

Article Engineering, Chemical

Adding cationic guar gum after collector: A novel investigation in flotation separation of galena from sphalerite

Xin Tan et al.

MINERALS ENGINEERING (2020)

添加到收藏夹

Article Metallurgy & Metallurgical Engineering

Synergistic depression mechanism of zinc sulfate and sodium dimethyl dithiocarbamate on sphalerite in Pb-Zn flotation system

Yan-fang CUI et al.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2020)

添加到收藏夹

Article Horticulture

Inhibition of postharvest senescence of green leafy vegetables by exogenous D-cysteine and L-cysteine as precursors of hydrogen sulphide

H. M. S. Al Ubeed et al.

JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY (2019)

添加到收藏夹

Article Chemistry, Analytical

Enantioseparation of N-acetyl-DL-cysteine as o-phtaldialdehyde derivatives obtained with various primary aliphatic amine additives on polysaccharide-based chiral stationary phases

Michal Dousa

JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS (2019)

添加到收藏夹

Article Chemistry, Physical

The effect of whey protein on the surface property of the copper-activated marmatite in xanthate flotation system

Xianzhong Bu et al.

APPLIED SURFACE SCIENCE (2019)

添加到收藏夹

Article Engineering, Chemical

Effect of iron concentration on the crystallization and electronic structure of sphalerite/marmatite: A DFT study

Jiushuai Deng et al.

MINERALS ENGINEERING (2019)

添加到收藏夹

Article Environmental Sciences

The role of cupric ions in the oxidative dissolution process of marmatite: A dependence on Cu2+ concentration

Xiaoyu Meng et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2019)

添加到收藏夹

Article Environmental Sciences

DL-cysteine and L-cystine formation and their enhancement effects during sulfur autotrophic denitrification

Wen Hao et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2019)

添加到收藏夹

Article Chemistry, Physical

DFT study of SDD and BX adsorption on sphalerite (110) surface in the absence and presence of water molecules

Jian Liu et al.

APPLIED SURFACE SCIENCE (2018)

添加到收藏夹

Article Physics, Condensed Matter

Ab initio calculations of the electronic structure and specific optical features of β-LiNH4SO4 single crystals

M. Ya. Rudysh et al.

PHYSICA B-CONDENSED MATTER (2018)

添加到收藏夹

Article Chemistry, Multidisciplinary

Ionicity and birefringence of α-LiNH4SO4 crystals: ab initio DFT study, X-ray spectroscopy measurements

M. Ya. Rudysh et al.

RSC ADVANCES (2017)

添加到收藏夹

Article Chemistry, Physical

Modulating electronic, magnetic and chemical properties of MoS2 monolayer sheets by substitutional doping with transition metals

Dongwei Ma et al.

APPLIED SURFACE SCIENCE (2016)

添加到收藏夹

Article Chemistry, Physical

A Computational and Experimental Study on the Binding of Dithio Ligands to Sperrylite, Pentlandite, and Platinum

Calum N. Waterson et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2016)

添加到收藏夹

Article Chemistry, Physical

Effects of sodium salt of N,N-dimethyldi-thiocarbamate on floatability of chalcopyrite, sphalerite, marmatite and its adsorption properties

Wenqing Qin et al.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2013)

添加到收藏夹

Article Engineering, Chemical

Selective depression of sphalerite by chitosan in differential Pb-Zn flotation

Peng Huang et al.

INTERNATIONAL JOURNAL OF MINERAL PROCESSING (2013)

添加到收藏夹

Article Chemistry, Multidisciplinary

Multiwfn: A multifunctional wavefunction analyzer

Tian Lu et al.

JOURNAL OF COMPUTATIONAL CHEMISTRY (2012)

添加到收藏夹

Article Engineering, Chemical

Evaluation of the replacement of NaCN with Acidithiobacillus ferrooxidans in the flotation of high-pyrite, low-grade lead-zinc ore

J. V. Mehrabani et al.

SEPARATION AND PURIFICATION TECHNOLOGY (2011)

添加到收藏夹

Article Metallurgy & Metallurgical Engineering

Pyrite depression in marmatite flotation by sodium glycerine-xanthate

He Ming-fei et al.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2011)

添加到收藏夹

Article Chemistry, Physical

A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu

Stefan Grimme et al.

JOURNAL OF CHEMICAL PHYSICS (2010)

添加到收藏夹

Article Chemistry, Physical

Halogen Bonding: A Study based on the Electronic Charge Density

Nancy J. Martinez Amezaga et al.

JOURNAL OF PHYSICAL CHEMISTRY A (2010)

添加到收藏夹

Article Engineering, Chemical

The first-principle study of the effect of lattice impurity on adsorption of CN on sphalerite surface

Ye Chen et al.

MINERALS ENGINEERING (2010)

添加到收藏夹

Article Engineering, Chemical

A DFT study on the effect of lattice impurities on the electronic structures and floatability of sphalerite

Ye Chen et al.

MINERALS ENGINEERING (2010)

添加到收藏夹

Review Geology

Geological and geochemical characteristics and ore genesis of the Keketale VMS Pb-Zn deposit, Southern Altai Metallogenic Belt, NW China

Bo Wan et al.

ORE GEOLOGY REVIEWS (2010)

添加到收藏夹

Article Engineering, Chemical

Process optimization and modelling of sphalerite flotation from a low-grade Zn-Pb ore using response surface methodology

J. V. Mehrabani et al.

SEPARATION AND PURIFICATION TECHNOLOGY (2010)

添加到收藏夹

Article Metallurgy & Metallurgical Engineering

Molecular structures and activity of organic depressants for marmatite, jamesonite and pyrite flotation

Chen Jian-hua et al.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2010)

添加到收藏夹

Article Chemistry, Physical

Surface structure of sphalerite studied by medium energy ion scattering and XPS

S. L. Harmer et al.

SURFACE SCIENCE (2007)

添加到收藏夹

Article Engineering, Chemical

Effect of iron content in sphalerite on flotation

A Boulton et al.

MINERALS ENGINEERING (2005)

添加到收藏夹

Article Computer Science, Interdisciplinary Applications

QUICKSTEP: Fast and accurate density functional calculations using a mixed Gaussian and plane waves approach

J VandeVondele et al.

COMPUTER PHYSICS COMMUNICATIONS (2005)

添加到收藏夹

Article Engineering, Chemical

Reagents in igneous phosphate ores flotation

RC Guimaraes et al.

MINERALS ENGINEERING (2005)

添加到收藏夹

Article Chemistry, Physical

From weak to strong interactions:: A comprehensive analysis of the topological and energetic properties of the electron density distribution involving X-H•••F-Y systems

E Espinosa et al.

JOURNAL OF CHEMICAL PHYSICS (2002)

添加到收藏夹

Article Chemistry, Inorganic & Nuclear

The Mayer bond order as a tool in inorganic chemistry

AJ Bridgeman et al.

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS (2001)

添加到收藏夹

Article Thermodynamics

Oxidation of marmatite

RI Dimitrov et al.

THERMOCHIMICA ACTA (2000)

添加到收藏夹

Article Chemistry, Physical

The chemical character of the intermolecular bonds of seven phases of ice as revealed by ab initio calculation of electron densities

S Jenkins et al.

CHEMICAL PHYSICS LETTERS (2000)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.