Fundamental issues on the influence of starch in amine adsorption by quartz

Shrimali, Kaustubh; Yin, Xihui; Wang, Xuming

doi:10.1016/j.colsurfa.2017.03.031

Cited by 39 publications

(5 citation statements)

References 45 publications

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“…Because classical MD cannot model chemical interactions, X-ray photoelectron spectroscopy (XPS) has validated this last mechanism. A clathrate-type interaction between DDA and starch was simulated by MD in a vacuum and aqueous solution using the generic Universal force field . This rationalized the observed decrease in the contact angle with water on the quartz surface by concealing the hydrophobic tail of DDA (Figure ).…”

Section: Applications Of Molecular Modeling To Froth Flotationmentioning

confidence: 99%

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Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

et al. 2023

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Froth flotation is the most versatile process in mineral beneficiation, extensively used to concentrate a wide range of minerals. This process comprises mixtures of more or less liberated minerals, water, air, and various chemical reagents, involving a series of intermingled multiphase physical and chemical phenomena in the aqueous environment. Today’s main challenge facing the froth flotation process is to gain atomic-level insights into the properties of its inherent phenomena governing the process performance. While it is often challenging to determine these phenomena via trial-and-error experimentations, molecular modeling approaches not only elicit a deeper understanding of froth flotation but can also assist experimental studies in saving time and budget. Thanks to the rapid development of computer science and advances in high-performance computing (HPC) infrastructures, theoretical/computational chemistry has now matured enough to successfully and gainfully apply to tackle the challenges of complex systems. In mineral processing, however, advanced applications of computational chemistry are increasingly gaining ground and demonstrating merit in addressing these challenges. Accordingly, this contribution aims to encourage mineral scientists, especially those interested in rational reagent design, to become familiarized with the necessary concepts of molecular modeling and to apply similar strategies when studying and tailoring properties at the molecular level. This review also strives to deliver the state-of-the-art integration and application of molecular modeling in froth flotation studies to assist either active researchers in this field to disclose new directions for future research or newcomers to the field to initiate innovative works.

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Section: Applications Of Molecular Modeling To Froth Flotationmentioning

confidence: 99%

“…Snapshot of a six glucose ring starch molecule and DDA before and after clathrate interaction, resulting in masking the DDA hydrophobic tail. Adapted with permission from ref . Copyright 2017 Elsevier.…”

Section: Applications Of Molecular Modeling To Froth Flotationmentioning

confidence: 99%

Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

et al. 2023

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“…The association of alkyl diamine and sulfonate is most preferred. And only when the amount of alkyl diamine dominates (larger than 50%), good collector adsorption with more ordered structures occurs at the feldspar surface (Vidyadhar and Rao, 2007;Shrimali et al, 2017;Tian et al, 2017;Xu et al, 2016aXu et al, , 2017a.…”

Section: Interaction Mechanism On the Feldspar Surfaces With Mixed Collectorsmentioning

confidence: 99%

Application of mixed collectors on quartz-feldspar by fluorine-free flotation separation and their interaction mechanism: A review

Li¹,

Ren²,

Xie³

et al. 2021

Physicochem. Probl. Miner. Process.

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Quartz and feldspar are usually exist in symbiosis in nature, and they are difficult to be separated effectively by conventional physical methods owing to their similarities in crystal structures and surface characteristics. Flotation is the most resultful method, and especially, flotation with hydrofluoric acid (HF) is the most efficient way. Because HF may cause serious environmental and health problems, the effective and environmentally friendly separation of quartz and feldspar remains a formidable challenge. The crystal structure, surface broken bonds, surface energy, and solid-liquid interface properties of quartz and feldspar are investigated in this paper. In particular, some types of mixed cationic/anion collectors and their interaction mechanism on the quartz and feldspar surfaces with acidic, alkaline, and neutral media in the absence of fluorine are discussed, and the grade and scheme of quartz and feldspar for the practical application are illustrated. This review proposes concrete research approaches and provides perspectives for the advanced processing of quartz and feldspar in an environmentally friendly and economical way.

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“…To describe froth flotation, models have been developed to describe how mineral particle properties should depend on variables such as surfactant surface coverage and particle size, but few studies have considered the structure and organization of the adsorbed surfactants themselves. − Such information is critical for understanding the stability of mineral–aqueous interfaces as well as mineral wetting and hydration. Given the increasing importance of surfactant–mineral interactions in both technological and environmental applications, efforts to identifyand even design from computational predictionssurfactants that bind mineral surfaces efficiently are expected to intensify.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Adsorption to Gypsum Surfaces and the Effects on Solubility in Aqueous Solutions

2022

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Vibrational sum frequency generation (VSFG) spectroscopy, conductometric titration measurements, and EDX elemental mapping were used to examine surfactant adsorption to the gypsum (010) surface and assess the effects of surfactant adsorption on gypsum solubility in aqueous solutions. Sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium chloride (DTAC) were used as anionic and cationic surfactants, respectively. Gypsum/SDS interactions result in an ordered precipitate layer on the gypsum surface after water evaporation; gypsum/DTAC interaction did not show a similar effect, despite exposure of gypsum to equivalent amounts of surfactant. VSFG spectra showed that SDS molecules adsorb with their chains parallel to the gypsum surface; spectra from gypsum surfaces treated with DTAC, however, showed no measurable response, implying that these surfactants form disorganized aggregates with no polar ordering. Vibrational data were supported by independent EDX measurements that show a uniform distribution of SDS across the gypsum surface. In contrast, element-specific EDX images showed that DTAC clustered in tightly localized patches that left most of the gypsum surface exposed. The uniform adsorption of SDS on the gypsum surface suppresses long-term dissolution up to 40% when compared to samples exposed to DTAC. Gypsum samples in DTAC-containing solutions lose approximately the same amount of material to dissolution as samples immersed in pure water.

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Fundamental issues on the influence of starch in amine adsorption by quartz

Cited by 39 publications

References 45 publications

Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review

Application of mixed collectors on quartz-feldspar by fluorine-free flotation separation and their interaction mechanism: A review

Surfactant Adsorption to Gypsum Surfaces and the Effects on Solubility in Aqueous Solutions

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