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
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Particuology
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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
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
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2020
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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
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
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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
·
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
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材料科学
✓ 已验证
产品关联
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
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2024
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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
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Jian Sun,Keke Li,Yunhan Xiong,Xiaohui Li,Xiaoyu Zhang,Rongyue Sun,Zijian Zhou
Microtubule-structured, Mn/Fe binary-doped dolomite-derived sorbents were synthesized by impregnated layer combustion synthesis method for direct solar-driven calcium looping system. The temperatures at which combustion occurs—specifically, 600, 700, 800, and 900 °C—as well as the modes used for impregnation, namely the wet and dry impregnated layer combustion synthesis methods, have a significant impact on both the CO 2 capture performance and the optical absorbance of the sorbent. Overall, the cyclic CO 2 capture performance of the microtubule-structured sorbents has been significantly enhanced, with a mere loss of 0.10 % to 0.32 % in CO 2 capture capacity after 20 cycles, attributed to the distinctive porous structure of the absorbent paper. Moreover, the combustion synthesis temperature exceeds a certain threshold, it will compromise the integrity of the hollow microstructure of the sorbent, and 800 °C is the desirable synthesis combustion temperature. The average solar absorbance of the sorbent significantly improves under various impregnation modes at 800 °C, reaching 66 % to 69 %. This enhancement is attributed to the formation of Ca 2 Fe 2 O 5 and Ca 2 MnO 4 , along with the decomposition of CaCO 3 . It’s noteworthy that the citric acid complexed microtubule-structured, dolomite-derived sorbent exhibits the highest and most consistent CO 2 capture capacity, retaining 93.5 % of its initial CO 2 capture capacity (0.243 g/g) by the 20th cycle. It alongside possesses the highest average solar absorbance of 69 %, underscoring the efficacy of citric acid complexes in achieving atomic-level uniformity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Bin Yang,Wanzhong Yin,Jin Yao,Zhanglei Zhu,Haoran Sun,Keqiang Chen,Shaohang Cao
Differential sorption behaviors of collectors at mineral/water interface play a crucial role in mineral flotation by selectively strengthening the hydrophobicity of the target minerals. To efficiently recover of magnesite from quartz, pentaethoxylated laurylamine (PEOLA) was introduced as a low-cost and high-selectivity collector to replace conventional collector laurylamine (LA). The collection performance and separation effectiveness of PEOLA were assessed by conducting flotation experiments. Furthermore, a series of surface detection experiments involving surface adsorption tests, zeta-potential characterization and FT-IR analysis, were conducted to uncover the selective collection mechanism of PEOLA toward quartz and magnesite. Flotation results indicated that compared with LA, PEOLA exhibited much better flotation selectivity for quartz against magnesite and could recover magnesite more effectively from quartz through reverse flotation. Therefore, PEOLA accomplished the efficient separation of magnesite and quartz, wherein 96.50% of magnesite was recovered and 95.50% of quartz was removed. Surface analyses demonstrated that a large quantity of PEOLA could be adsorbed onto quartz instead of magnesite, which promoted the efficient collection of quartz using PEOLA. Furthermore, the intense adsorption of PEOLA onto quartz was driven by the combination of electrostatic attraction and hydrogen bonding interactions. Thus, PEOLA can be considered as a high-performance and low-cost collector for efficiently recovering magnesite from quartz.
研究领域:
矿物加工
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Lingchao Kong,Yu Tian,Yi Wang,Ning Li,Yang Liu,Zheng Pang,Xiaohong Huang,Ming Li,Jun Zhang,Wei Zuo
Global eutrophication and phosphorus (P) crisis raise urgent demands for feasible materials for effective phosphorus removal and recovery from wastewater. In order to render efficient phosphate capture and reclamation, PER@PLDH with a peony-like hierarchical nanostructure was synthesized based on low-cost natural clays via a facile green hydrothermal method. It was the first report on periclase as a structure inducer for designing palygorskite-based nanocomposites with a three-dimensional hierarchical structure. Results of morphologic and spectroscopic analysis confirmed the identity of PER@PLDH synthesized under the periclase/palygorskite mass ratio of 2:1 as a layered double hydroxide composite. PER@PLDH and its calcined derivative PER@PLDO both demonstrated excellent phosphate capture capacities of 229.39 mg P/g and 448.58 mg P/g, respectively, up to 4 times higher than that of the unmodified sample without introducing periclase. High removal rate was also observed in mixed solutions including competing anions and humic acid, resulting in a stringent phosphate-deficient effluent to meet increasingly rigorous discharge standard. Mechanism analysis unveiled the ultrahigh P uptake by PER@PLDH was mainly attributed to the effect of anion exchange while inner-sphere surface complexation dominated the phosphate capture process of PER@PLDO. Remarkably, compared with two commercial fertilizers, the exhausted PER@PLDH after phosphate capture exhibited superior fertilization efficiency via direct use in soils without leaching of toxic metals. These encouraging results highlighted the novel approach of fabricating layered double hydroxides by using low-cost clays. Also, this study provides promising candidates for efficient phosphorus capture and recovery in practical water remediation.
研究领域:
环境科学
·
材料科学
·
水处理
·
农业科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）