JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Bin Yang,Donghui Wang,Shaohang Cao,Wanzhong Yin,Jiwei Xue,Zhanglei Zhu,Yafeng Fu,Jin Yao
This research focused on the adsorption features and depression mechanism of 1-hydroxyethylene-1,1-diphosphonic acid (HEDP) used as a novel dolomite depressant on dolomite and magnesite surfaces, to extend the application of HEDP for the selective flotation of magnesite from dolomite. The depression impacts of HEDP on the flotation behaviors of the two minerals were investigated through micro-flotation tests. The flotation results indicated that, when sodium oleate (NaOl) was used as the collector, HEDP displayed an outstanding depression effect on the dolomite flotation, whereas it had only a slight influence on the magnesite flotation. Dolomite and magnesite could be efficiently separated at approximately pH 10 with a reagent scheme of 200 mg/L HEDP and 120 mg/L NaOl. The selective depression mechanism of HEDP for dolomite was revealed using contact angle, X-ray photoelectron spectroscopy (XPS), zeta potential, and infrared spectrum (IR) analyses. The results from the contact angle tests indicated that HEDP selectively reduced the surface hydrophobicity of dolomite in the NaOl system. Besides, zeta-potential measurements and IR analyses revealed that the addition of HEDP prior to NaOl had no significant impact on the adsorption of NaOl onto magnesite; however, this addition strongly prevented NaOl from being adsorbed onto dolomite, resulting in a significant difference in the flotation performances of the two minerals. Furthermore, crystal chemistry calculations and XPS analyses confirmed that the strong adsorption of HEDP on the dolomite surface could be attributed to the interaction between the HEDP electron-rich groups and the calcium species exposed to dolomite. Thus, HEDP could be used as a high-performance depressant for the dolomite flotation to realize the decalcification of the magnesite flotation.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Chao Wang,Ting Jiang,Junwei Huang,Min Chen,Huimin Hu,Lei Peng,Lei Wu,Zeng Chaocheng,Qiwu Zhang
The remediation of high-concentration thallium (Tl + ) contaminated wastewater is a critical environmental concern. Current research emphasizes the effectiveness of adsorption and oxidation methods for Tl + treatment, yet challenges persist in enhancing their performance. This study explores the feasibility of emergency Tl + wastewater treatment and elucidates the mechanisms of Tl + incorporation into mineral structures, with a focus on the struvite mineral as a framework for Tl + integration via NH 4 + ion exchange. To assess the efficacy and mechanisms of Tl + immobilization, we utilized comprehensive analytical techniques, including X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS), Thermogravimetric Analysis (TG), and Density Functional Theory (DFT) calculations. The findings reveal that struvite adsorbs Tl + onto its surface, followed by an ion exchange process between monovalent cations (NH 4 + /K + ) within the structure and Tl + . Ultimately, Tl + is incorporated in the form of a (NH 4 ,Tl)MgPO 4 solid solution within the structure, achieving a remarkable maximum incorporation capacity of 320.56 mg/g, which significantly surpasses the capacity of typical adsorbents. The findings demonstrate significant Tl + incorporation, validating the approach for emergency wastewater treatment and suggesting the potential of mineralogy in environmental remediation. This research contributes to advancing heavy metal wastewater treatment strategies, offering a foundation for further investigation.
研究领域:
环境科学
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矿物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Particuology
·
2021
·
IF 3.067
Zhanglei Zhu,Yafeng Fu,Wanzhong Yin,Haoran Sun,Keqiang Chen,Yuan Tang,Bin Yang
Surface roughness has a significant influence on mineral flotation. The assisting effect of surface roughness on minerals flotation is extensively investigated from its physical properties (e.g., the existing form of asperity and its size), however, the associated effect on mineral flotation based on the differences in surface chemical property caused by surface roughness has been rarely touched. With such a question in mind, in this study, we investigated the flotation recoveries of two batches of magnesite particles with varying degree of surface roughness produced by two different mills, and associated the flotation performances to their surface chemical properties (amount of adsorption sites for the collector) via a series of detections, including Scanning Electron Microscope-Energy Dispersive Spectrometry (SEM-EDS) observations, X-ray photoelectron spectroscopy (XPS) analysis, adsorption capacity tests, and contact angle measurements. Finally, we concluded that rougher magnesite particles could provide more active sites (Mg 2+ ) for a larger capacity of sodium oleate (NaOL), thereby improving the hydrophobicity and floatability.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Jin Yao,Bin Yang,Keqiang Chen,Haoran Sun,Zhanglei Zhu,Wanzhong Yin,Ningbo Song,Qiuyue Sheng
Efficient separation of magnesite from dolomite remains challenging owing to the similar floatability of the two minerals. Therefore, understanding the adsorption behaviors of surfactants (depressants and collectors) on their surfaces is essential for improving separation efficiency. In this study, the ability of sodium tripolyphosphate (STPP) to separate magnesite from dolomite was evaluated in sodium oleate (NaOl) systems, with an emphasis on its effect on the depression of dolomite. The mechanisms underlying the differential adsorption and depression of STPP were investigated through surface analyses, namely Fourier transform infrared spectroscopy , zeta-potential analysis, adsorption-quantity analysis, and X-ray photoelectron spectroscopy. The flotation results indicated that STPP facilitated the removal of dolomite from magnesite in the NaOl system because it significantly depressed dolomite, whereas its effect on magnesite was negligible. Surface analyses revealed that the preferential adsorption of STPP on dolomite was due to the interaction between the –PO 4 tetrahedra of STPP and Ca sites. Furthermore, in the presence of STPP, small amounts of NaOl were adsorbed onto dolomite, inhibiting the flotation of dolomite. However, substantial amounts of NaOl were adsorbed onto magnesite, maintaining the good floatability of magnesite. Therefore, STPP can be considered as a promising depressant for separating magnesite from dolomite via direct flotation.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Yafeng Fu,Bin Yang,Yingqiang Ma,Qianyu Sun,Jin Yao,Wenbiao Fu,Wanzhong Yin
This research focused on the effect of particle size and flotation time on magnesite flotation, and the flotation performance of various size fractions were predicted by a machine learning (ML) method. Four kinetic models were used to fit the recovery of MgO and SiO 2 in various size fractions of magnesite flotation. The results demonstrated that the flotation of magnesite exhibits good agreement with the classical first-order kinetic model. Besides, the effect of various particle sizes on MgO recovery and selectivity index was predicted by ML method. It was shown that the proposed ML model could accurately reproduce the effects of particle size and flotation time on magnesite flotation performance. Furthermore, the developed model revealed that the optimal mean size range for magnesite flotation is 30 to 48 μm. Therefore, this paper is of great significance to the application of ML methods in the prediction of various magnesite size flotation performance.
研究领域:
矿物加工工程
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人工智能应用
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
·
IF 7.8
Xiaoqi Ban,Jin Yao,Wanzhong Yin,Weifan Du,Taozhong Zhang,Yu Xie,Wenju Sun,Yulian Wang
Magnesite and dolomite exhibit similar crystal structures, chemical compositions, and surface properties, which pose significant challenges to their flotation separation. In response to the growing need for efficient and environmentally sustainable decalcification of magnesite, this study introduces luteolin (LUT), a novel eco-friendly depressant. The selective depression efficiency of LUT on dolomite within the magnesite flotation system was systematically assessed. Optimal flotation conditions (pH 11.0, LUT concentration of 60 mg/L, and NaOl concentration of 120 mg/L) resulted in a concentrate with 43.05 % MgO and 4.98 % CaO, effectively achieving the separation of magnesite from dolomite. The depression mechanism of LUT was thoroughly investigated through a combination of zeta potential, contact angle, FTIR, XPS, and AFM analyses. The results indicate that LUT’s hydroxyl groups preferentially adsorb onto the calcium sites of dolomite, preventing subsequent adsorption of sodium oleate, while exhibiting minimal interaction with magnesium sites on magnesite, thus preserving its flotation behavior. This study offers a promising, environmentally friendly solution for the selective separation of magnesite from dolomite.
研究领域:
矿物加工工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiaoqi Ban,Jin Yao,Wanzhong Yin,Yu Xie,Weifan Du,Taozhong Zhang,Yulian Wang
This study introduces N-[3-(Isodecyloxy)propyl]propane-1,3-diamine (IOPDA), a novel cationic surfactant, as a collector in the reverse flotation desilication of magnesite. It systematically evaluates IOPDA’s selective collecting performance in the flotation separation of magnesite from quartz. Single-mineral and artificial mixed mineral flotation experiments were conducted at pH 6.0 and an IOPDA concentration of 80 mg/L, where results showed significant improvements in flotation separation efficiency. The final concentrate achieved an MgO grade of 46.55 %, SiO2 grade of 1.97 %, and a quartz removal rate of 92.51 %. Compared to the conventional Dodecylamine (DDA), the flotation Selectivity Index (SI) and Separation Efficiency (SE) under IOPDA conditions were notably superior, demonstrating its enhanced selective collecting ability. To elucidate the selective adsorption mechanism of IOPDA, advanced techniques—such as contact angle measurements, Zeta potential testing, FTIR, XPS, AFM, and TOF-SIMS—were employed to analyze adsorption on magnesite and quartz surfaces. The study found that IOPDA preferentially adsorbs on the oxygen sites of quartz through electrostatic interactions and hydrogen bonding, while its adsorption on magnesite is weaker. This selective adsorption enhances the wettability difference between the minerals, facilitating highly efficient flotation separation.
研究领域:
矿物加工工程
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材料化学
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界面化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinhui Zhang,Linlin Chang,Xinfeng Zhu,Jia Yao,Aoxuan Bai,Junning Wang,Rongfu Peng,Guofeng Li,Libin Jiang,Kai Wang,Xueping Liu,Shiqiang Yin,Chaohai Wang
Large quantities of MgO materials have been obtained by roasting waste magnesite. Compared with the traditional MgO synthesis method, the preparation method in this paper is simple, inexpensive, environmentally friendly, and can be produced on a large scale. XRD and XPS results show that the main component of the magnesite roasted product is MgO. The SEM results show that after hydration treatment and secondary roasting, the morphology of MgO changed from granular to flower-like. XRD and XPS before and after the reaction showed that a hydration reaction (Mg(OH) 2 ) could take place when MgO activates PMS. The activity results showed that MgO was able to remove 96 % of the doxycycline within 30 min, which was significantly higher than that of the conventional MOF materials and comparable to the ZIF-67 activity of the cobalt-based MOF materials. In addition, MgO has superior catalytic activity for Congo red (90.59 %), methyl orange (40.04 %), and tetracycline (98.85 %). Quenching experiments revealed 1 O 2 as the main active species. The material has good potential for practical applications as shown by anion interference experiments, pH and cycling experiments. The optimum reaction condition is when the MgO content is 0.6 g/L and the PMS content is 0.6 g/L.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2021
·
IF 4.765
Haoran Sun,Wanzhong Yin,Bin Yang,Keqiang Chen,Qiuyue Sheng
The flotation performances of magnesite and quartz were investigated in this work using N-hexadecyltrimethylammonium chloride (HTAC) as a collector. Micro-flotation tests were performed in a pilot study, and the results demonstrated that HTAC had high selective collection ability to quartz. Further, batch flotation results showed that HTAC could effectively remove quartz from magnesium-bearing carbonate ores. The adsorption behaviors of HTAC onto the surfaces of two minerals were analyzed through zeta-potential measurements and X-ray photoelectron spectroscopy (XPS) detection, which revealed that HTAC was mainly adsorbed on quartz rather than magnesite. Thus, HTAC could be used as a high-selectivity collector to efficiently separate magnesite from quartz.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2018
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IF 4.513
Wenbao Liu,Wengang Liu,Shujuan Dai,Ting Yang,Zhen Li,Ping Fang
Magnesite ore powder is the primary raw material used to prepare refractory magnesia. With the depletion of high-grade magnesite, methods to reduce the impurities and improve the quality of magnesite ore powder are urgently required. In this study, an ethanolamine-based surfactant, bis (2-hydroxyethyl) dodecylamine (BHDA), was first introduced into the flotation of magnesite ore as a novel collector, and the possibility of improving the purity of the ore was investigated by experiment and theory. Flotation tests, X-ray photoelectron spectroscopy, Fourier-transform-IR spectroscopy, and zeta potential measurements were carried out to study the behaviors and mechanisms by which the collector enhances the purity of magnesite ore powder. The flotation results revealed the noticeable difference in the floatability of quartz, magnesite, and dolomite when combined with the collector over a wide range of pulp pH values (4.18–9.17). The analytical results obtained from FTIR spectra, XPS, and zeta potential measurements indicate that BHDA was readily adsorbed on the surface of quartz, mainly by electrostatic and hydrogen bonding interactions, whereas it was adsorbed on the surfaces of magnesite and dolomite by weak electrostatic interactions. By introducing a hydroxyethyl group to the tertiary amine collector, more hydrogen bonds can form with the surface of quartz, strengthening the adsorption stability. Thus, compared to the traditional collector, dodecylamine, BHDA showed better desilication and purification performance for magnesite ore powder. Meanwhile, our results show that the simpler reagent system and process flow makes BHDA promising for the industrial purification of magnesite ore powder.
研究领域:
矿物加工工程
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材料科学与工程
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化学工程与技术
✓ 已验证
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2024
·
IF 1.4
Zhonghua Xue,Yali Feng,Haoran Li,Jun Yang,Mengyao Liu,Yufeng Cui
The accumulation of magnesite tailings (MT) poses challenges such as resource wastage, land occupation, dust generation, and environmental pollution, thereby jeopardizing both physical and mental health. Urgent attention is required for the proper treatment of this solid waste material. An in-depth investigation into enhancing the flotation processes of MT is essential. A comprehensive comprehension of the surface properties of MT and its principal gangue minerals assumes paramount importance in facilitating the desilication and decalcification of MT via flotation. In this investigation, a first-principles study grounded in density functional theory was employed to scrutinize the surface properties, as well as the similarities and differences in flotability, of four minerals-quartz, magnesite, dolomite, and calcite. The findings reveal that quartz's primary cleavage plane is (1 0 1), whereas that of magnesite, dolomite, and calcite is (1 0 4). The surfaces of magnesite, dolomite, and calcite exhibit chemical similarities, with Ca atoms demonstrating higher reactivity than Mg atoms. The hydrogen bonding between dodecylamine and quartz emerges as the most robust, while adsorption energies with the three carbonate minerals exhibit minimal disparity. The ongoing focus lies on the selection and optimization tests of decalcification reagents. A moderate quantity of dodecylamine manifests a certain desilication effect. However, excessive dosage compromises selectivity. The first-principles approach offers guiding significance for elucidating the surface properties of MT and its primary vein minerals, along with investigating the adsorption mechanisms of flotation regents.
研究领域:
矿物学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Zhanglei Zhu,Donghui Wang,Bin Yang,Wanzhong Yin,Morteza S. Ardakani,Jin Yao,Jaroslaw W. Drelich
Roughness of mineral particles affects bubble-particle interactions and particle flotation separation. In this study, magnesite was ground in stainless-steel disc and ceramic ball mills to produce flotation feed material of different surface nano-roughness, which was quantified using atomic force microscopy (AFM). The effect of surface roughness on the floatability of magnesite particles was carried out by a micro-flotation kinetic test using an XFG flotation machine. The flotation results demonstrated both higher flotation recovery and larger flotation rate constant for particles having larger nano-asperities of rough particle surface. Additionally, the difference in cumulative flotation recovery between magnesite particles with different nano-roughness characteristics systematically decreased with increasing collector (sodium oleate) concentration from 25 to 150 mg/L. Contrarily, a difference in the value of flotation kinetics constant for particles with larger and smaller asperities remained at a level of 0.2–0.3 min −1 for the entire range of collector concentration. The interaction energy between bubbles and rough magnesite particles with different nano-roughness was estimated using an extended DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. The theoretical interaction energy points to lowering energy barrier when the magnesite particles are covered with 12 nm asperities as compared to 2 nm asperities. It is therefore hypothesized that the energy barrier is a primary cause for differences in flotation performance of particles decorated with nano-asperities of different dimensions.
研究领域:
矿物加工工程
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）