Xiaohua Peng, Xingbin Li, Chang Wei, Zhigan Deng, Minting Li, Gang Fan
{"title":"An Environmentally Friendly Method for Producing α-Fe2O3 Pigment from Low-Grade Hematite Residue","authors":"Xiaohua Peng, Xingbin Li, Chang Wei, Zhigan Deng, Minting Li, Gang Fan","doi":"10.1007/s11837-024-06901-y","DOIUrl":null,"url":null,"abstract":"<div><p>This study employed low-grade hematite acquired from zinc hydrometallurgy to synthesize α-Fe<sub>2</sub>O<sub>3</sub> pigment via high-temperature hydrothermal treatment. This study investigated the effects of hydrothermal conditions on α-Fe<sub>2</sub>O<sub>3</sub> pigment. The results indicate that hydrothermal treatment causes the internal rearrangement of Fe (oxyhydr)oxides into Fe oxides. A high-quality α-Fe<sub>2</sub>O<sub>3</sub> pigment with a Fe content > 69% and Zn and S content < 0.15% and 0.25% was successfully synthesized using the HCl-H<sub>2</sub>O medium at > 260°C. The average crystal size of α-Fe<sub>2</sub>O<sub>3</sub> pigment was found to be between 45 nm and 80 nm. The α-Fe<sub>2</sub>O<sub>3</sub> pigment consists of prismatic crystals with a smooth surface and distinct edges. The UV-VIS-NIR spectra demonstrated that the α-Fe<sub>2</sub>O<sub>3</sub> pigment strongly absorbs light in the wavelength range of 200–420 nm, and its absorption edge falls between 420 nm and 550 nm. Additionally, the α-Fe<sub>2</sub>O<sub>3</sub> pigment has chromatic values of <i>L</i>* = 37.27–38.69, <i>a</i>* = 5.07–6.26, and <i>b</i>* = 1.70–2.49. All α-Fe<sub>2</sub>O<sub>3</sub> products show similar colors. This work introduces an environmentally friendly method for synthesis of high-quality α-Fe<sub>2</sub>O<sub>3</sub> pigment using iron removal residue in zinc hydrometallurgy.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 12","pages":"7231 - 7246"},"PeriodicalIF":2.1000,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JOM","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11837-024-06901-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study employed low-grade hematite acquired from zinc hydrometallurgy to synthesize α-Fe2O3 pigment via high-temperature hydrothermal treatment. This study investigated the effects of hydrothermal conditions on α-Fe2O3 pigment. The results indicate that hydrothermal treatment causes the internal rearrangement of Fe (oxyhydr)oxides into Fe oxides. A high-quality α-Fe2O3 pigment with a Fe content > 69% and Zn and S content < 0.15% and 0.25% was successfully synthesized using the HCl-H2O medium at > 260°C. The average crystal size of α-Fe2O3 pigment was found to be between 45 nm and 80 nm. The α-Fe2O3 pigment consists of prismatic crystals with a smooth surface and distinct edges. The UV-VIS-NIR spectra demonstrated that the α-Fe2O3 pigment strongly absorbs light in the wavelength range of 200–420 nm, and its absorption edge falls between 420 nm and 550 nm. Additionally, the α-Fe2O3 pigment has chromatic values of L* = 37.27–38.69, a* = 5.07–6.26, and b* = 1.70–2.49. All α-Fe2O3 products show similar colors. This work introduces an environmentally friendly method for synthesis of high-quality α-Fe2O3 pigment using iron removal residue in zinc hydrometallurgy.
期刊介绍:
JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.