Separations
·
2024
·Vol. 11
·期 4
·95
·
IF 2.5
Chenyang Yao,Yachao Li,Peng Li,Xiaokui Che,Guosheng Li,Fanfan Zhang,Weijun Peng,Bozeng Wu,Guixia Fan
This paper presents the development of an environmentally friendly, small molecular depressant citrus pectin for improving the recovery of cassiterite resources. Citrus pectin extracted from citrus peel was utilized as the depressant, and it demonstrated significant potential in separating calcite from cassiterite in micro-flotation tests. The molecular weight of the citrus pectin extracted in this paper decreased from 11,485,412 Da to 32,959 Da compared to commercial pectin, resulting in the depressant efficiency of the reagent. The results of a zeta potential and adsorption test indicated that citrus pectin had less and weaker adsorption on the cassiterite surface and could be replaced with NaOL. The chemical adsorption process of citrus pectin on the surface of calcite was determined through FTIR spectroscopy analysis. XPS analysis results indicated that the interaction between the carboxyl groups of citrus pectin and calcium atoms enables adsorption to occur. The AFM revealed that citrus pectin displayed a uniform and dense pattern of point-like adsorption on the surface of calcite. Micro-flotation experiments showed that cassiterite recovery of 80% can be obtained at a citrus pectin dosage of 10 mg/L. Citrus pectin has the advantages of being low-cost, highly selective, and environmentally suitable, making it a promising alternative to conventional reagents.
研究领域:
矿物加工工程
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环境科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Chen Cheng,Jingjie Wu,Zhiqiang Huang
In this study, a novel collector, N 1 ,N 10 -dihydroxydecanediamide (DHH) was synthesized in our lab and introduced in flotation of malachite ore. The separation performance and action mechanism of DHH were explored and compared with octyl hydroxamic acid (OHA). The results of single mineral flotation tests indicated that DHH exhibited a stronger collecting ability to malachite and better selectivity against quartz and calcite than OHA, and floated out 94 % malachite, 8.5 % quartz and 17 % calcite at pH = 10 with a collector concentration of 60 mg/L. The FTIR spectra, zeta-potential tests and XPS tests proved that DHH could absorb onto malachite surface though a chemical mode. DFT calculation results showed that DHH anion owned a stronger affinity to malachite than DHH molecular and OHA anion/molecular, and its bis-minerophilic groups could form C(=O)NHO-Cu bond with surface Cu atom. It exhibited that DHH was an excellent candidate and capable for high efficiency flotation of malachite ore.
研究领域:
矿物加工工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Siyu Chen,Qiushi Tian,Lin Wang,Zheng Wang,Junfeng Gu,Yidi Li,Hao Xie,Weimin Wang,Hao Wang,Hang Ping,Zhengyi Fu
Biological mineralized tissues exhibit exceptional mechanical robustness by incorporating nanoscale inclusions, which enhance toughness by inducing crack deflection through either reversible deformation or local compressive stress. Inspired by these design principles, high-performance calcite ceramics are fabricated by cold sintering of SiO 2 nanoparticles-encapsulated CaCO 3 microspheres. The microspheres are assembled through particle attachment of radially oriented vaterite nanoparticles, enabling efficient encapsulation of SiO 2 nanoparticles within the microspherical architecture. Assisted by cold sintering process (CSP) at 250 °C and 700 MPa, the densified CaCO 3 ceramic containing 2 wt% SiO 2 achieves optimal mechanical properties: a Vickers hardness of 3.0 GPa and a flexural strength of 105.5 MPa, 1.7 and 1.5 times improvements over the control groups, respectively. It demonstrates that the strong interfacial interactions between SiO 2 nanoparticles and calcium carbonate matrices induce a 0.49 % contraction in the (104) interplanar spacing of calcite, generating compressive stress that impedes crack propagation and improves deformation resistance. Furthermore, the prestressed ceramics exhibit a 20 % increase of fracture toughness, and a 38 % enhancement of dynamic impact resistance relative to the control group. Learning from the biomineralization process could effectively guide the development of prestress-reinforced artificial ceramics under low-temperature and low-energy conditions.
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Xueming Yin,Jin Yao,Xiufeng Gong,Wanzhong Yin,Jianwei Yu,Yulian Wang
The synchronous flotation separation of limonite from its associated gangue minerals, calcite, and quartz, has long posed a significant challenge in mineral processing. Given that previous studies have focused more on the separation of limonite from single vein minerals or a certain type of vein mineral, as well as the common use of reverse flotation processes. This study innovatively investigated the synchronous positive flotation separation of guar gum (GG) from limonite, silicon containing vein quartz, and calcium containing vein calcite in the sodium dodecyl sulfonate (SDS) system. Flotation test results showed that GG significantly reduced the flotation recovery of calcite and slightly reduced the recovery of limonite and quartz, resulting in a significant flotation difference between limonite and calcite/quartz. Fourier-transform infrared spectroscopy and adsorption quantity tests revealed that in the presence of GG, SDS had weak adsorption ability on the surfaces of quartz and calcite, but strong adsorption on limonite surface. X-ray photoelectron spectroscopy analysis further indicated that GG slightly reduced SDS adsorption at Fe sites on limonite surfaces while substantially hindering SDS adsorption at Ca sites on calcite. Notably, GG showed negligible interference with the weak SDS adsorption at Si sites on quartz surfaces. Extended Derjaguin-Landau-Verwey-Overbeek theory calculations confirmed that the introduction of GG into the SDS system led to mutual attraction between limonite particles and bubbles while inducing mutual repulsion between quartz and calcite particles and bubbles. Therefore, GG significantly improved the separation efficiency of limonite and gangue minerals, and 98.55 % quartz and 84.77 % calcite were removed to achieve synchronous separation of limonite from quartz and calcite.
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
ADVANCED POWDER TECHNOLOGY
·
2025
·
IF 4.2
Yonghong Xu,Lingyun Huang,Mei Zhang,Jianhan Zhou,Bo Hu,Louyan Shen,Jian Liu,Dandan Wu,Siyuan Yang
The challenging separation of cassiterite from calcite by flotation stems from their similar floatability, requiring innovative combined collectors to improve process efficiency and selectivity. Here, a novel PTPA/FeCl 3 collector was developed by synthesizing p- tert -butylphenylhydroxamic acid (PTPA) with FeCl 3 . Microflotation tests showed that using PTPA alone yielded 81.80% SnO 2 and 45.87% CaO recoveries, whereas PTPA/FeCl 3 increased SnO 2 recovery to 89.51% while reducing CaO to 27.02%, demonstrating superior separation efficiency. Contact angle measurements confirmed enhanced cassiterite hydrophobicity from the mixed collector. SEM-EDS and XPS analyses revealed effective chemisorption of PTPA/FeCl 3 on cassiterite, where PTPA and FeCl 3 formed a stably adsorbed chelate complex. In contrast, calcite exhibited weak and unstable adsorption. The mixed collector thus combines strong collecting capability with high selectivity for cassiterite over calcite.
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
MINERALS ENGINEERING
·
2019
·
IF 3.315
Cheng Liu,Wencai Zhang,Hongqiang Li
In this study, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) was introduced as a depressant for the flotation separation of apatite from calcite. The micro-flotation test results showed that good floatability of both apatite and calcite were obtained at around pH 8.5 when using sodium oleate (NaOl) as collector. Mixed minerals flotation test results showed that an efficient separation of apatite from calcite was achieved using PBTCA as depressant, which presented a selective depression for the calcite. Zeta potential measurements indicated that the addition of PBTCA prior to NaOl did not interfere the interaction between NaOl and apatite while it decreased NaOl adsorption on calcite surface.
研究领域:
矿物加工
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浮选分离
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表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
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IF 4.233
Chenhu Zhang,Sun Wei,Yuehua Hu,Honghu Tang,Jiande Gao,Zhigang Yin,Qingjun Guan
Selective adsorption of tannic acid (TA) on calcite surfaces and the implications of this process for the separation of fluorite ore were studied by microflotation tests, surface adsorption experiments, zeta potential measurements, UV–vis analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The microflotation tests indicated that TA, when added before sodium oleate (NaOl), could selectively depress calcite from fluorite at pH 7. Surface adsorption experiments revealed that TA hinders the interaction of NaOl with calcite. The zeta potential of calcite became more negative with TA than with NaOl. However, the characteristic features of TA adsorption were not observed on fluorite, suggesting that the dominant adsorption sites are dissimilar on the fluorite and calcite surfaces in the pulp. UV–vis spectroscopy, XPS, and solution chemistry analysis were utilized to obtain a better understanding of the mechanism for selective adsorption of TA as well as the key factors determined by the Ca 2+ and Ca(OH) + components on the mineral surfaces. A possible adsorption mechanism along with an adsorption mode is proposed for the surface interaction between TA and calcite.
研究领域:
矿物加工工程
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表面化学
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胶体与界面科学
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资源利用
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浮选化学
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Xianchen Wang,Qin Zhang
The surface wettability and flotation dynamic characteristics of calcite are of great significance for separating it from other coexisting minerals, and the surface roughness plays an important role in the wettability and floatability of calcite particles. In this paper, the effect of roughness on the wettability, surface energy, and flotation kinetics of calcite were investigated. Results indicated that roughness increased the wettability of the hydrophilic calcite surface, while enhanced the hydrophobicity of the hydrophobic surface . There was a good correlation between the wettability and surface energy of various roughness surfaces. The roughness (λ) of rod milled particles of the same size fraction was about 5% higher than that of ball-milled particles, and that of coarse particles was generally greater than fine. The relationship between particles roughness and flotation rate (k) can be quantitatively characterized well by k = 0.0039λ 2 –0.0589λ + 2.6097 for ball mill, and k = 0.1251λ + 0.8184 for rod mill.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2024
·
IF 4.2
Jiali Chen,Peng Gao,Jie Liu,Yimin Zhu
Scheelite and calcite was firstly separated by new depressant Poly(sodium 4-styrenesulfonate) (PSS) with NaOL system. The recovery of scheelite was 87.18 % and the recovery of calcite was 5.57 % in single flotation experiments, the recovery and grade of WO 3 was 70.53 % and 61.08 % respectively in artificial mixed ore flotation under the optimal conditions of 10 mg/L NaOL, 10 mg/L PSS and pH of 8. Contact angle measurements, atomic force microscope (AFM) analysis, zeta potential analysis, fourier transforming infrared spectra (FT-IR) analysis and X-ray photoelectron spectroscopy (XPS) analysis were performed to uncover the reaction mechanism. The results showed that PSS could not adsorbed on scheelite by chemical reaction, and PSS had no impact on the further adsorption of NaOL onto the scheelite surface. Therefore, scheelite could still keep a high recovery with PSS. However, PSS could be strongly adsorbed on calcite by chemisorption between the Ca site of calcite and O site of PSS, which increased the hydrophilia of calcite and imped the further adsorption of NaOL. Therefore, it could selectively depress the flotation of calcite.
研究领域:
矿物加工工程
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表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Ziyang Chu,Zhengyan Han,Haibo Liu,Tianhu Chen,Xuehua Zou,Hanlin Wang,Fuwei Sun,Hao Wang,Dong Chen
The simultaneous removal of heavy metal complexes (HMCs) and heavy metal ions presents a significant challenge in treating wastewater. To address this, we propose a Calcite/Peroxymonosulfate (Calcite/PMS) system aimed at simultaneously decomplexing Cu-EDTA and removing Cu ions . Calcite/PMS system could achieve 99.5 % Cu-EDTA decomplexation and 61.9 % Cu ions removal within 60 min under initial conditions of Cu-EDTA (10 mg/L), Calcite (3 g/L), and PMS (2 mM). Singlet oxygen ( 1 O 2 ) emerged as the predominant reactive species responsible for Cu-EDTA decomplexation, which selectively targeted the N-C bonds in the Cu-EDTA structure to produce intermediates with lower biotoxicity than EDTA. Interestingly, solid phase Cu(III) (≡Cu(III)) promoted the generation of superoxide radicals (O 2 •− ) with a contribution of up to 72.8 %. Subsequently, nascent ≡Cu(III) and O 2 •− accelerated the degradation of intermediates. Besides, coexisting organic substances inhibited Cu-EDTA decomplexation, whereas inorganic ions had a weak impact. After five cycles of use, the Calcite/PMS system retained 99.3 % efficiency in decomplexing Cu-EDTA. This investigation provides valuable insights into using calcite to remove HMCs and enhances our comprehension of the decomplexation intermediates accelerating HMCs degradation.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chen Cheng,Guangsheng Zeng,Zhiqiang Huang
3-Ethyl-4-pyridylamidoxime (EPA) and 3-methyl-5- tert -butyl-4-pyridylamidoxime (MBPA) were introduced as the collectors in the flotation and enrichment of malachite from calcite and quartz. Compared with MBPA and the traditional collector benzohydroxamic acid (BHA), EPA exhibited a better flotation performance. Its collecting ability to malachite was stronger than BHA, and its selectivity toward calcite and quartz was better than MBPA. In the absence of Pb 2 + ions, 2.0 × 10 −4 mol/L EPA at pH 8.0 could recover about 86 % malachite, 20 % calcite and 22 % quartz. Under the same conditions, BHA floated out around 58 % malachite, 27 % calcite and 10 % quartz. The contact angle and SEM proved that EPA could enhance the surface hydrophobicity of malachite via corrosion to produce more active sites for its heavy adsorption. FTIR and XPS revealed that EPA would chelate with the surface Cu atom to form -O-Cu and -N-Cu bonds. EPA owned stronger electron-donating ability and worse electron-accepting ability than BHA, which brought a stronger chemical reactivity. Moreover, its isomer could further enhance the adsorption ability onto malachite. The novel amidoxime collector EPA was able to efficiently lead-free enrich malachite and enhance the industrial capacity to treat copper oxide ores.
研究领域:
矿物加工工程
·
化学工程与技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2023
·Vol. 58
·期 11
·2300113
·
IF 1.5
Qiaoli Lu,Meng Li,Lin Zhang,Chunfang Gan
Replicating the key structural feature of calcium carbonate (CaCO 3 ) by biomolecules provides unique inspiration for synthesis of CaCO 3 suitable for industry application. The biomolecule-based morphological strategies generally contain the strong interaction between crystal and functional groups, such as carboxyl group and alcohol hydroxyl group. Here, a comparative study of low-molecular-weight organic acids (OAs) with structural similarity on calcite crystallization is presented. The morphological evolution of calcite from rhombohedron to ellipsoid is observed, needle-like or dumbbell-like in the presence of monohydroxy OAs of lactic acid, malic acid, or citric acid, suggesting carboxyl group shows more remarkable effect on the morphologies of calcite than that of Li + . The strong adsorption behavior of carboxyl group on calcite can decrease the crystallinity with increased number of carboxyl groups. In contrast, the dicarboxylic OA of tartaric acid showed stronger effects on the phase transition process from vaterite to calcite than that of succinic acid and monohydroxy OAs. These findings will aid in synthesizing CaCO 3 with specific morphology and polymorph by biochemical methods and are of great significance to the industrial application of CaCO 3 .
研究领域:
材料科学
·
生物矿化
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）