Minerals and Mineral Materials最新文献_第3页

Selective recovery of Pb(II) from a waste electrolyte via ion flotation with iminodiacetic acid-functionalized graphene oxide as a nanocollector 亚氨基二乙酸功能化氧化石墨烯纳米捕收剂离子浮选法从废电解质中选择性回收铅(II

Minerals and Mineral Materials Pub Date : 1900-01-01 DOI: 10.20517/mmm.2022.03

Luping Chang, W. Peng, Yijun Cao, Yihe Miao, Guixia Fan, Yukun Huang, Xiangyu Song, Xianggen Chen

{"title":"Selective recovery of Pb(II) from a waste electrolyte via ion flotation with iminodiacetic acid-functionalized graphene oxide as a nanocollector","authors":"Luping Chang, W. Peng, Yijun Cao, Yihe Miao, Guixia Fan, Yukun Huang, Xiangyu Song, Xianggen Chen","doi":"10.20517/mmm.2022.03","DOIUrl":"https://doi.org/10.20517/mmm.2022.03","url":null,"abstract":"In this work, iminodiacetic acid-functionalized graphene oxide (IDA@GO) is prepared and used as a nanocollector for enhancing and selectively recovering Pb(II) from a strongly acidic waste electrolyte via ion flotation. IDA@GO is characterized by Fourier transform infrared spectroscopy, zeta potential measurements and atomic force microscopy. The effects of pH, reaction time, cetyl trimethyl ammonium bromide (CTAB) dosage and aeration rate on the Pb(II) concentration and turbidity of the residual solution are examined systematically. The experimental results show that the adsorption capacity of Pb(II) on IDA@GO can reach 91.21 mg/g at pH 2. After froth flotation, the turbidity of the treated solution decreased to 0.55 NTU under the optimal CTAB dosage and aeration rate. In addition, as compared with GO, the relative selectivity coefficients of IDA@GO are up to 1.304, 1.471, 1.807 and 1.509 for Co(II), Ni(II), Zn(II) and Cd(II), respectively, thereby exhibiting better selectivity performance. Moreover, IDA@GO can be reused as a nanocollector in ion flotation and exhibits ideal regeneration performance. In addition, the recovery mechanism is found to proceed through Pb(II) adsorbing on IDA@GO by electrostatic attraction, ion exchange and surface complexation, with the addition of CTAB improving the hydrophobicity of Pb(II)-loaded IDA@GO flocs, thus achieving the recovery of Pb(II) via froth flotation.","PeriodicalId":319570,"journal":{"name":"Minerals and Mineral Materials","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123466591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Nitrogen sulfur dual-doped porous biochar fibers for high performance lithium-sulfur battery 高性能锂硫电池用氮硫双掺杂多孔生物炭纤维

Minerals and Mineral Materials Pub Date : 1900-01-01 DOI: 10.20517/mmm.2023.06

Xuefeng Li, Kaige Sun

引用次数: 0

Molecular simulation in surface hydration of clay minerals: a review of theory and applications 黏土矿物表面水化的分子模拟:理论与应用综述

Minerals and Mineral Materials Pub Date : 1900-01-01 DOI: 10.20517/mmm.2022.01

F. Min, Lu-Zhuang Wang, Jun Chen, Chunfu Liu, Bao Ren, Lianfeng Zhang, Yi-Sheng Zhu

{"title":"Molecular simulation in surface hydration of clay minerals: a review of theory and applications","authors":"F. Min, Lu-Zhuang Wang, Jun Chen, Chunfu Liu, Bao Ren, Lianfeng Zhang, Yi-Sheng Zhu","doi":"10.20517/mmm.2022.01","DOIUrl":"https://doi.org/10.20517/mmm.2022.01","url":null,"abstract":"Clay minerals, which are prevalent gangue minerals, are found in tailings and beneficiation effluent after the extraction of valuable minerals. The surface of clay mineral particles is easy to hydrate, which makes it the main factor restricting tailings separation and wastewater treatment. However, the microscopic mechanism of clay mineral particle surface hydration is not yet systematic. In recent years, with the development of molecular simulation theory and the improvement of computational efficiency, density functional theory (DFT) and molecular dynamics (MD) have gradually become a powerful tool for studying the surface hydration of clay mineral particles, which provides new insight into the interaction between the crystal structures of clay minerals and the interfacial interaction in surface hydration of clay mineral particles at the molecular or atomic levels. This article first reviews the basic theory of DFT and MD, then reviews the research progress on clay mineral surface hydration. From the perspective of molecular simulation, a comprehensive discussion of the clay mineral phase structure, the establishment of the supercell surface model, the clay-water interface interaction and the limitations of molecular simulation was conducted. Water molecules can adsorb with different mineral surfaces in slime water through hydrogen bond, which is the basis of surface hydration mechanism. The hydration layer is composed of three water layers with different densities, with a thickness of about 8-10 Å. Water and ions form hydrate cations, which are adsorbed on the surface of clay minerals, change the structure of water layer on the surface of minerals. This article ends with a brief discussion of conclusions and perspectives.","PeriodicalId":319570,"journal":{"name":"Minerals and Mineral Materials","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116429455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Research subjects suggested to young scientists in mineral processing to tackle future challenges of mining and minerals processing 向矿物加工领域的青年科学家建议的研究课题，以应对采矿和矿物加工的未来挑战

Minerals and Mineral Materials Pub Date : 1900-01-01 DOI: 10.20517/mmm.2022.08

Shaoxian Song

引用次数: 0

Alkali pretreatment effects on acid leaching recovery of rare earth elements from coal waste of the Western Kentucky No. 13 and Fire Clay seams 碱预处理对西肯塔基13号和火粘土煤层废煤中稀土元素酸浸回收的影响

Minerals and Mineral Materials Pub Date : 1900-01-01 DOI: 10.20517/mmm.2022.05

Qi Li, Bin Ji, Zhong Xiao, Wencai Zhang

{"title":"Alkali pretreatment effects on acid leaching recovery of rare earth elements from coal waste of the Western Kentucky No. 13 and Fire Clay seams","authors":"Qi Li, Bin Ji, Zhong Xiao, Wencai Zhang","doi":"10.20517/mmm.2022.05","DOIUrl":"https://doi.org/10.20517/mmm.2022.05","url":null,"abstract":"The recovery of rare earth elements (REEs) from the Western Kentucky No. 13 and Fire Clay coal wastes was enhanced by alkali pretreatment with concentrated NaOH solutions. The enhancements in the recovery of light REEs (LREEs) are more significant than those of heavy REEs (HREEs). For example, after treating with 5 M NaOH at 90 °C, the recovery of LREEs from the Western Kentucky No. 13 coal waste increased from 26% to 71%, while the recovery of HREEs only increased from 29% to 41%. Based on mineralogical studies through scanning electron microscopy-energy dispersive X-ray spectroscopy and X-ray diffraction analyses, two mechanisms were proposed to explain the positive effect of alkali pretreatment: (1) decomposition of rare earth minerals (primarily crandallite-group minerals) during the alkali pretreatment, and (2) liberation of encapsulated REE-bearing particles due to the enhanced dissolution of clay minerals. The more significant enhancements in the recovery of LREEs were explained by the fact that the REEs comprised in the crandallite-group minerals were mainly LREEs. Compared with zircon, monazite, and xenotime, alkali pretreatment with 5 M NaOH led to a more significant decomposition of crandallite-group minerals. In order to further increase the recovery of REEs, particularly HREEs, harsher alkali treatment conditions are required.","PeriodicalId":319570,"journal":{"name":"Minerals and Mineral Materials","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125955576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6