Hydrometallurgy最新文献

{"title":"Bioleaching for metals removal from mine tailings flotation fractions","authors":"Tamara A. Schueler ,&nbsp;Axel Schippers ,&nbsp;Daniel Goldmann","doi":"10.1016/j.hydromet.2024.106286","DOIUrl":"10.1016/j.hydromet.2024.106286","url":null,"abstract":"<div><p>This study investigated two bioleaching strategies for removing heavy metals from three mine tailings fractions generated by flotation processes. On the one hand, bioleaching with microbial consortia of acidophilic mesophiles and moderate thermophiles efficiently extracted Co, Cu, Zn, and As, while the leaching of Pb was facilitated through the use of organic acids produced by a heterotrophic bacterium and a fungus. Approximately 100% Co, 68% Zn, 63% As, and 31% Cu were bioleached with acidophilic mesophiles from the barite tailings (BT) sample after 14 days, whereas for the barite concentrate (BC) sample the results showed about 100% Co, 70% Zn and As, and 45% Cu removal at the same period. The sulfide concentrate (SC) sample underwent bioleaching with both consortia, acidophilic mesophiles and moderate thermophiles over 28 days. Approximately, 67% of Co, 28% of Zn, 56% of As, 28% of Cu, and 6% of Mn were extracted from the sample using mesophiles, whereas the leaching efficiency with the moderate thermophiles was about 72% of Co, 50% of Zn, 28% of As, 36% of Cu, and 5% of Mn in 20 L bioreactors. On the other hand, bioleaching of Pb was explored using the bacterium <em>Gluconobacter oxydans</em> and the fungus <em>Penicillium simplicissimum</em> for the production of gluconic acid and citric acid, respectively. Additionally, besides glucose-based media, glycerol and crystal sugar were tested as alternative and cheaper carbon sources. The metabolic activity of <em>P. simplicissimum</em> allowed a maximum Pb leaching of 39–43% from the BT sample in 28 days in glycerol-based medium, while for the BC sample, the maximum Pb extraction was around 60% in glucose-based medium. A lower extraction of Pb was achieved with <em>G. oxydans</em> for both samples. The maximum extraction of 34% and 39% of Pb was reached within 7 days when glucose was used as the carbon source. Further optimization should address both the enhancement of metals removal and – especially for the organic acid bioleaching – the reduction of costs related to media formulation and fungal biomass production on a larger scale.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304386X24000264/pdfft?md5=36bb81e12716dbefb3901913c680802f&pid=1-s2.0-S0304386X24000264-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139916379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaching of catalyst platinum from cured silicone elastomers: A preliminary study for comparing reagents","authors":"Tobias Feix,&nbsp;Aseel Ali Fadhil,&nbsp;Dennis Troegel","doi":"10.1016/j.hydromet.2024.106283","DOIUrl":"10.1016/j.hydromet.2024.106283","url":null,"abstract":"<div><p>Addition curing systems involve two-part silicones which require the mixture of a silicone polymer with a catalyst to initiate the cure. Platinum is the most commonly used metal catalyst for addition curing of silicones by hydrosilylation which involves the crosslinking by the addition reaction of silicon hydride species to unsaturated bonds, mainly C<img>C, but also C<img>O or C<img>N double bonds. After crosslinking of the polymers, the platinum catalyst cannot be recovered but remains in the silicone materials throughout the entire product life. In the end, platinum is disposed of together with the silicones and is thus lost to the value chain. The overall objective of this work was to develop a recycling process for the recovery of platinum from addition-cured silicone elastomers. In the first step, this was achieved by efficient digestion methods and by optimizing the leaching processes for exemplary commercial silicone elastomer products. Two different silicone materials were investigated, both of which were crosslinked with a platinum catalyst. The initial Pt content in the tested samples was 12.6 ± 0.2 mg/kg for a commercial silicone impression material and 6.3 ± 0.5 mg/kg for a silicone baking mold, measured by graphite furnace atomic absorption spectrometry (GF-AAS). Samples were first frozen with liquid nitrogen to improve brittleness and then crushed with a simple food processor to obtain a silicone granule. Various acid mixtures, mainly based on sulfuric acid, were investigated as digestion methods in order to extract platinum from the silicone network. These had different effects on the dissolution behavior of silicone samples and the amount of platinum extracted in each case. The amount of platinum leached from the filtrate of the digested samples in each case was measured by ICP-OES to evaluate the efficiency of different leaching mixtures. In addition, the dissolved platinum species present in the solutions was identified by UV/VIS as tetrachloridoplatinate(II) complex. The best platinum leaching results so far were obtained with two methods, both of which used a leaching mixture based on sulfuric acid and hexamethyldisiloxane (M₂). In the presence of hydrochloric acid, 9.6 ± 1.6 mg platinum/kg was leached from the silicone impression material and 4.2 ± 0.8 mg platinum/kg from the silicone baking mold. With the additional use of <em>aqua regia</em> instead of hydrochloric acid, 10.4 ± 2.8 mg platinum/kg was extracted from the silicone impression material and 4.8 ± 1.0 mg platinum/kg was extracted from the silicone baking mold. These methods were replicated with <em>n</em> = 3. Using statistical evaluation methods (F-test, <em>t</em>-test, and confidence interval), no significant difference was found between these two best methods. Recovery of platinum(0) from leach mixtures has not yet been achieved due to high dilution and very low platinum concentration in samples and will be part of another study.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304386X24000239/pdfft?md5=7195348b8a6d7da69b01653637d603df&pid=1-s2.0-S0304386X24000239-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139827646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rotating disc method to study the dissolution kinetics of copper metal in citric acid and hydrogen peroxide","authors":"Mahmoud Motasim ,&nbsp;Salih Aydoğan ,&nbsp;Babiker Ali ,&nbsp;Tevfik Agacayak","doi":"10.1016/j.hydromet.2024.106281","DOIUrl":"https://doi.org/10.1016/j.hydromet.2024.106281","url":null,"abstract":"<div><p>This study reports the kinetics of copper metal dissolution in citric acid-hydrogen peroxide solution using the rotating disc method. The effect of the concentration of citric acid as well as hydrogen peroxide, stirring speed, disc surface area, and temperature was investigated. The concentration of hydrogen peroxide (0.25–1.5 mol/L) has a strong effect on the dissolution rate (mg/min) of copper with a reaction order of 0.92, compared to a reaction order of 0.42 with respect to the concentration of citric acid (0.125–1.5 mol/L). The reaction rate is directly proportional to the disc area (<em>A</em>) and square root of the disc rotation speed (<em>ω</em>^<em>1/2</em>), as expected from the Levich equation. The activation energy of 33 kJ/mol, in the temperature range 30-60 °C is also comparable with the values reported in previous studies.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139732934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the use of foams for silver leaching using the thiosulfate‑copper(II)-ammonia system in the context of e-waste recycling","authors":"Cyriaque Bruez ,&nbsp;Anne Rousseau ,&nbsp;Grégory Lefèvre ,&nbsp;Cécile Monteux","doi":"10.1016/j.hydromet.2024.106279","DOIUrl":"https://doi.org/10.1016/j.hydromet.2024.106279","url":null,"abstract":"<div><p>Due to its physical properties, metallic silver is present in numerous electronic wastes. Its recycling requires selective extraction, which involves leaching of silver as the first step. This work focusses on leaching silver with Cu(II)/NH₃/S₂O₃^{2<em>−</em>} which has been widely used for gold leaching. As recently shown for the leaching of copper, using foams whose aqueous phase consists of leaching chemicals is a promising way to reduce the environmental footprint, by improving the metal oxidation caused by the fast transfer of O₂ from bubble to bubble. In this work, metallic silver samples are dissolved by foams made of Cu(II)/NH₃/S₂O₃^{2<em>−</em>} solution with bubbles composed of O₂-N₂ mixtures. The main problem of the thiosulfate route is its degradation during metal oxidation hence it requires using large quantities of this reactant. The results obtained for our leaching foams show that the quantity of silver leached per quantity of thiosulfate used is about three times greater in comparison with a solution, which would bring a new approach to this problem. Moreover, we investigate the role of the bubble size and the gas composition (dioxygen partial pressure). Besides we find that the dissolved silver is inhomogeneously distributed between the foam column and the bottom solution, with an accumulation of 90 % of silver inside the foam, hence opening an interesting perspective for an easy separation of silver upon leaching. Comparing several surfactants, we show that only non-ionic surfactant polyoxyethylene oleyl ether, Brij O10, shows satisfying results, while dodecyl trimethyl ammonium chloride most likely binds with silver complexes and triggers a quick collapse of the foams.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139694756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boron extraction by aliphatic mono- and di-hydroxy alcohols from a representative continental brine","authors":"Abdoul Fattah Kiemde ,&nbsp;Jérôme Marin ,&nbsp;Victoria Flexer ,&nbsp;Alexandre Chagnes","doi":"10.1016/j.hydromet.2024.106280","DOIUrl":"10.1016/j.hydromet.2024.106280","url":null,"abstract":"<div><p>The extraction properties of mono-hydroxy alcohols (2-butyl-1-octanol, 2-ethyl-1-hexanol, 1-octanol) and di-hydroxy alcohols (2-ethyl-1,3-hexanediol, 2-butyl-2-ethyl-1,3-propanediol, 2-methyl-2,4-pentanediol) towards boron, potassium, lithium, sodium, calcium and magnesium ions were investigated as a function of pH and phase volume ratio (O/A) by considering an aqueous phase with a composition mimicking the brine from the Salar de Hombre Muerto in Argentina, in the Lithium Triangle. The mono-hydroxy alcohols are soluble in kerosene and sulfonated kerosene whereas the di-hydroxy alcohols are only soluble in mixtures of kerosene and toluene or <em>m</em>-xylene. No significant effect of the diluent on the extraction properties is observed. All alcohols exhibit high selectivity for boron over potassium, lithium, sodium, calcium and magnesium at acidic pH (pH = 1–5.5). A significant decrease of the extraction efficiency of boron by the mono-hydroxy alcohols is observed at pH &gt;5.5 while no significant decrease of the extraction efficiency occurs with di-hydroxy alcohols. Finally, the best conditions to selectively extract boron from the synthetic brine with 1 mol L⁻¹ mono-hydroxy alcohols or di-hydroxy alcohols at 35 °C are pH = 5.5 and O/A = 4 when the diluent is kerosene and O/A = 2 when the diluent is a mixture of kerosene and toluene.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304386X24000203/pdfft?md5=4e773a80595d25eb138bcca5f044df28&pid=1-s2.0-S0304386X24000203-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139700739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extraction of lithium and phosphorus from amblygonite using calcium sulfate roasting and water leaching","authors":"Qingfeng Zhou,&nbsp;Xiangdong Ma,&nbsp;Xunhui Xiong","doi":"10.1016/j.hydromet.2024.106282","DOIUrl":"10.1016/j.hydromet.2024.106282","url":null,"abstract":"<div><p>This work proposes the roasting of amblygonite with calcium sulfate followed by water leaching to extract lithium and phosphorus. Various roasting parameters including roasting temperature, the mass ratio CaSO₄/ore, roasting time as well as leaching parameters, such as the liquid/solid ratio, temperature and time, have been carefully investigated. The lithium extraction efficiency can be as high as 99.8% with a mass ratio of CaSO₄/ore of 0.85 after roasting at 775 °C for 1 h and water leaching at a liquid/solid ratio of 3 mL/g at 100 °C for 2 h. The XRD analysis demonstrates that the fluoride in the amblygonite can be converted into Ca₅(PO₄)₃F and CaF₂. Lithium in the leach liquor can be recovered as Li₂CO₃. Meanwhile, the phosphorus in the water leach residue can be recovered as FePO₄ with a high recovery of 96.6% after acid dissolution and precipitation, which can be further treated to produce LiFePO₄.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139677109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extraction of magnesium from mine tailings for carbon dioxide mineralization: A preliminary study of the effect of ammonium sulfate to tailings ratio on products and yield","authors":"Marjut Mälkki,&nbsp;Sampo Mäkikouri","doi":"10.1016/j.hydromet.2024.106268","DOIUrl":"https://doi.org/10.1016/j.hydromet.2024.106268","url":null,"abstract":"<div><p>Carbon capture and storage is needed to achieve deep cuts in industrial carbon dioxide (CO₂) emissions. One option for storing carbon dioxide is its mineralization, which is especially useful in regions with available mine tailings but no nearby geological formations suitable for carbon dioxide storage. A multi-step mineralization route has been developed at Åbo Akademi University. In this study the first step, thermal extraction of magnesium, was further improved for two magnesium-rich Finnish mine tailings as raw materials. In the experiments, the maximum yield of extracted magnesium was similar (57–65%) to that of previous studies for both tailings with a ratio of 1:3 of mine tailings to ammonium sulfate ((NH₄)₂SO₄), but only slightly better than with a ratio of 1:2 (55–58%). It was also found that increasing the average temperature from 410 to 460 °C slightly decreased the yield. Moreover, increasing the amount of the extracting agent, ammonium sulfate, can increase the possibility of obtaining efremovite ((NH₄)₂Mg₂(SO₄)₃) instead of magnesium sulfate (MgSO₄). This new knowledge of the effect of the reagent ratios on the formation of extraction products like efremovite could be exploited in further studies to minimize water consumption and thus energy use in ammonium sulfate recycling.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0304386X24000082/pdfft?md5=40ccdb0d7cd8da0b4421c49e6dd22c4f&pid=1-s2.0-S0304386X24000082-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139674450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaching of catalyst platinum from cured silicone elastomers: A preliminary study for comparing reagents","authors":"Tobias Feix, A. Fadhil, Dennis Troegel","doi":"10.1016/j.hydromet.2024.106283","DOIUrl":"https://doi.org/10.1016/j.hydromet.2024.106283","url":null,"abstract":"","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139887550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alkaline in-situ leaching of uranium in low-permeability sandstone: An experimental study using online low field nuclear magnetic resonance (LF-NMR) spectroscopy on multiphase response","authors":"Tong Zhang ,&nbsp;Haitao Zhang ,&nbsp;Xin Yang ,&nbsp;Junlin Mao ,&nbsp;Xuebin Su ,&nbsp;Yang Liu ,&nbsp;Guoliang Zhou ,&nbsp;Zhizheng Xie","doi":"10.1016/j.hydromet.2024.106269","DOIUrl":"10.1016/j.hydromet.2024.106269","url":null,"abstract":"<div><p><span>Uranium leaching was influenced by multiphase flow<span><span> and geological structure during in-situ recovery of uranium (ISRU). In this study, the characteristics of multiphase flow and pore structure responding to the alkaline ISRU was investigated, using a real-time triaxial coupling nuclear </span>magnetic resonance experiment system. The component of leaching solute, flow regime and pore structure evolution was monitored online through the T</span></span>₂<span><span> spectrum and magnetic resonance imaging (MRI), and corresponding coupling correlation of uranium recovery and pore conductivity was analyzed. The result demonstrates that the uranium sandstone was composed of micropore (1–10 ms), mesopore (10–100 ms), and </span>macropore (&gt;100 ms) corresponding to different relaxation times (ms). The uranium migration was mainly dominated by mesopore, and mineral dissolution and precipitation were influenced by micropore and macropore. Uranium recovery based on colloidal tetravalent and hexavalent uranium particles was exponentially correlated with the volume of leaching solution passed through the solute (solid phase/pores) and slightly contributed by the seal pore and matrix-bearing uranium. The physical migration, mineral dissolution, carbonate precipitation, and alternation by reactive transport occurred and was influenced by the hydrodynamic pressure. The dissolution of U, Ca, and Si experienced a dynamic period (0–5 PV), buffer period (5–37 PV), transition period (37–200 PV), and stable period (200–319 PV); peak concentration of U occurred at 5 PV, and 73.4% of uranium was recovered in the scope of 0–37 PV. Here, 1 PV represents the sample pore volume of 3.95 cm</span>³. The porosity and permeability were enlarged under the influence of the chemical dissolution and physical migration, but decreased with the precipitation of CaCO₃ and SiO₂ colloids. Permeability and porosity exhibited a positive correlation with the volume of solution passed through in the range of 0–100 PV, but a negative correlation was observed in the range of 100–319 PV. The findings provide significant insight into ISRU engineering practice.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139565804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sulfur dioxide as a thiourea stabilizer in the Carbon-in-Leach (CIL) process using a hydrodynamic cavitation-reactor for gold recovery from dump tailings","authors":"I.R. Boboev ,&nbsp;F.S. Tabarov ,&nbsp;S. Vorotilo","doi":"10.1016/j.hydromet.2024.106261","DOIUrl":"10.1016/j.hydromet.2024.106261","url":null,"abstract":"<div><p><span>This research improves the gold recovery from dump tailings employing the Carbon in Leach (CIL) process and using thiourea<span> as a gold lixiviant. The integration of sulfur dioxide in the CIL process, utilizing a Hydrodynamic Cavitation (HC) reactor, was explored to mitigate the pronounced consumption of thiourea. The HC reactor was found to catalyze the generation of OH</span></span>^•<span><span> radicals via hydrodynamic cavitation, acting as a robust oxidizing agent. A comprehensive examination revealed the impact of the </span>inlet pressure of pulp in the HC reactor, temperature, and iron(III) sulfate concentration on the oxidoreduction potential (ORP) within the CIL process with supplied SO</span>₂. We have found that under specific parameters -including the initial concentration of H₂SO₄, thiourea loading, coal loading, SO₂ supply, inlet pressure of pulp supply to the HC reactor, and the CIL processing time - a substantial degree of gold recovery is achievable. Particularly, with a thiourea consumption of 0.57 kg/t and sulfur dioxide at 8 kg/t, gold recovery peaked at 93.5%.</p></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139494831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}