{"title":"A novel interaction theory for the starch adsorption onto hematite surface","authors":"","doi":"10.1016/j.apt.2024.104607","DOIUrl":null,"url":null,"abstract":"<div><p>Depressant starch (NS) was generally used in hematite flotation, while the adsorption mechanism of the macromolecular polymer onto mineral surfaces remained in question. In this study, novel detection approaches and computational chemistry methods were introduced to update the widely-accepted acid-base interaction theory. Microflotation tests confirm that the hematite flotation recovery was easily depressed by NS under the acid or alkaline conditions rather than the neutral condition. Zeta potential measurement shows that NS could change the zeta potential of hematite, while the shift amplitude ranked as alkaline > acid > neutral, indicating the most suitable pH range is the alkaline condition. XPS analysis reveals that NS could chemisorbed onto Fe atoms of hematite surface via C-O groups in the whole studied pH range. It was further verified using AFM tests, in which the NS has a stronger interaction force under the alkaline environment. MDS further indicates that the interaction energy between NS and the (0<!--> <!-->0<!--> <!-->1) hematite surface was three times greater than others under alkaline conditions. In general, the interaction force at the interface between the hematite surface and NS was a strong chemical adsorption at the alkaline conditions while there was weak chemisorption and hydrogen bonding under the neutral or acidic conditions.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921883124002838","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Depressant starch (NS) was generally used in hematite flotation, while the adsorption mechanism of the macromolecular polymer onto mineral surfaces remained in question. In this study, novel detection approaches and computational chemistry methods were introduced to update the widely-accepted acid-base interaction theory. Microflotation tests confirm that the hematite flotation recovery was easily depressed by NS under the acid or alkaline conditions rather than the neutral condition. Zeta potential measurement shows that NS could change the zeta potential of hematite, while the shift amplitude ranked as alkaline > acid > neutral, indicating the most suitable pH range is the alkaline condition. XPS analysis reveals that NS could chemisorbed onto Fe atoms of hematite surface via C-O groups in the whole studied pH range. It was further verified using AFM tests, in which the NS has a stronger interaction force under the alkaline environment. MDS further indicates that the interaction energy between NS and the (0 0 1) hematite surface was three times greater than others under alkaline conditions. In general, the interaction force at the interface between the hematite surface and NS was a strong chemical adsorption at the alkaline conditions while there was weak chemisorption and hydrogen bonding under the neutral or acidic conditions.
期刊介绍:
The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide.
The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them.
Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)