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Recovery of zinc and lead from Yahyali non-sulphide flotation tailing by sequential acidic and sodium hydroxide leaching in the presence of potassium sodium tartrate

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Transactions of Nonferrous Metals Society of China 2020年第12期30卷 3367-3378页

作者： Sait KURSUNOGLU Soner TOP Muammer kaya Department of Materials Science&Nanotechnology Engineering Abdullah Gul UniversityKayseri 38100Turkey Division of Mineral Processing Department of Mining EngineeringEskisehir Osmangazi UniversityEskisehir 26480Turkey

The recovery of zinc and lead from Yahyali non-sulphide flotation tailing using sulfuric acid followed by sodium hydroxide leaching in the presence of potassium sodium tartrate was experimentally *** the acidic leaching stage,the effects of pH,solid-to-liquid ratio and temperature on the dissolution of zinc from the tailing were explored.82.3%Zn dissolution was achieved at a pH of 2,a temperature of 40°C,a solid-to-liquid ratio of 20%and a leaching time of 2 h,whereas the iron and lead dissolutions were determined to be less than 0.5%.The sulfuric acid consumption was found to be 110.6 kg/t(dry tailing).The leaching temperature had no beneficial effect on the dissolution of zinc from the *** acidic leach solution was subjected to an electrowinning *** cathode product consisted of 99.8%Zn and 0.15%*** the alkaline leaching stage,the Pb dissolution increased slightly in the presence of potassium sodium *** than 60%of Pb was taken into the leach solution when the leaching temperature increased from 40 to 80°*** final leach residue was analyzed by XRD and *** XRD results indicated that the major peaks originated from the goethite and quartz while minor peaks stem from smithsonite and *** XRF analysis demonstrated that the residue contained 70.3%iron *** on the sequential leaching experiments,the zinc and lead were excellently depleted from the flotation tailing,leaving a considerable amount of iron in the final residue.

关键词： zinc lead flotation tailing sequential leach

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Microstrip Patch Antenna with an Inverted T-Type Notch in the Partial Ground for Breast Cancer Detections

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1301-1322页

作者： Nure Alam Chowdhury Lulu Wang Md Shazzadul Islam Linxia Gu Mehmet kaya Department of Biomedical Engineering and Science Florida Institute of TechnologyMelbourneFL 32901USA Biomedical Device Innovation Center Shenzhen Technology UniversityShenzhen518118China Department of Electrical and Computer Engineering International Islamic University MalaysiaJalan GombakSelangor53100Malaysia

This study designs a microstrip patch antenna with an inverted T-type notch in the partial ground to detect tumorcells inside the human *** size of the current antenna is small enough(18mm×21mm×1.6mm)todistribute around the breast *** operating frequency has been observed from6–14GHzwith a minimumreturn loss of−61.18 dB and themaximumgain of current proposed antenna is 5.8 dBiwhich is flexiblewith respectto the size of *** the distribution of eight antennas around the breast phantom,the return loss curveswere observed in the presence and absence of tumor cells inside the breast phantom,and these observations showa sharp difference between the presence and absence of tumor *** simulated results show that this proposedantenna is suitable for early detection of cancerous cells inside the breast.

关键词： Antenna microwave wideband cancer breast phantom tumor detection

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“绮心儿”正名

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西藏大学学报（社会科学版） 2024年第3期39卷 41-46页

作者：万么项杰青海民族大学旅游学院青海西宁810000

早在吐蕃时期,西藏本土曾涌现出了众多名为“绮心儿”的历史人物。在藏文和汉文史料里,其作为名字的前缀屡屡出现,汉文存在“绮心儿”“乞心儿”“骑心儿”以及“起律心儿”等多种不同的写法。由于“绮心儿”在汉藏民族交往交流交融,以... 详细信息

早在吐蕃时期,西藏本土曾涌现出了众多名为“绮心儿”的历史人物。在藏文和汉文史料里,其作为名字的前缀屡屡出现,汉文存在“绮心儿”“乞心儿”“骑心儿”以及“起律心儿”等多种不同的写法。由于“绮心儿”在汉藏民族交往交流交融,以及促进国家统一等方面成就斐然,故而受到了国内外学界的瞩目。迄今,已有众多前辈专门探究了“绮心儿”的姓氏、生平与事迹,为深入研究“绮心儿”筑牢了良好根基。文章依据敦煌本吐蕃历史文书“大事纪年”以及其他藏、汉文献中的相关记录,针对“绮心儿”一词的基本内涵,其在称谓里的作用和变化等问题展开探讨,旨在助推学界对该问题的进一步研讨。

关键词：绮心儿吐蕃时期爵位

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蒸发毛细弯液面热质传输特征及其稳定性分析

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西安交通大学学报 2010年第3期44卷 21-25页

作者：黄晓明 TARIK kaya 华中科技大学能源与动力工程学院武汉430074 卡尔顿大学机械与航空航天工程学院

在基于增广杨拉普拉斯方程及Wayner界面传质方程的蒸发毛细弯液面薄膜区热质传输模型的基础上,利用数值计算分析方法,讨论了系统运行参数、几何参数、工质物性参数对界面热质传输能力和稳定性的影响.结果表明:高过热度和高弯液面温度下... 详细信息

在基于增广杨拉普拉斯方程及Wayner界面传质方程的蒸发毛细弯液面薄膜区热质传输模型的基础上,利用数值计算分析方法,讨论了系统运行参数、几何参数、工质物性参数对界面热质传输能力和稳定性的影响.结果表明:高过热度和高弯液面温度下,弯液面具有较强的热传输能力,但稳定性下降;毛细通道几何参数对界面热质传输的影响较小,而选择不同的工质其界面热质传输特征会有较大差异.相对而言,高热质传输能力对应了较低的界面稳定性,故在毛细抽吸两相回路的设计中需综合考虑二者的关系.

关键词：毛细抽吸两相装置蒸发弯液面传热传质

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Crack Detection by Optical Voice Recorder Based on Digital Holography

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Photonic Sensors 2019年第4期9卷 327-336页

作者： Gülhan USTABAŞkaya Zehra SARAÇ Zonguldak Bülent Ecevit University Faculty of EngineeringDepartment of Electrical and Electronics EngineeringIncivezZonguldak 67100Turkey

The detection of crack on materials is an important issue in *** the contrary to conventional methods,such as manual inspection,sensor detection,and image processing techniques,a new simple method to detect the crack is proposed with optical voice recorder based on digital holography in this *** obtained with sound waves passing through the materials are recorded by using the digital holography *** behavior of the sound wave passing through the material,which is obtained from these holograms,gives image of *** this article,cracks in various materials are determined by the proposed new method,and crack images obtained with this new system are presented.

关键词： Crack detection sound wave digital holography material surface

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Raman lasing and Fano lineshapes in a packaged fiber-coupled whispering-gallery-mode microresonator

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Science Bulletin 2017年第12期62卷 875-878页

作者： Guangming Zhao Sahin kaya Ozdemir Tao Wang Linhua Xu Eshan King Gui-Lu Long Lan Yang Department of Electrical and Systems Engineering Washington University in St.LouisMO 63130USA State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China

We report Raman lasing and the optical analog of electromagnetically-induced-transparency(EIT) in a whispering-gallery-mode(WGM) microtoroid resonator embedded in a low refractive index polymer matrix together with a tapered fiber coupler. The microtoroid resonator supports both single mode and multimode Raman lasing with low power thresholds. Observations of Fano and EIT-like phenomena in a packaged microresonator will enable high resolution sensors and can be used in networks where slow-light effect is needed. These results will open up new possibilities for portable, robust, and stable WGM microlasers and resonator-based sensors for applications in various environments.

关键词： MicrocavitiesOptical resonatorsPackagingRaman lasingFano resonanceEIT

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Importance of Plant Biodiversity and Long-Term Conservation of Plant Genetic Resources via Biotechnological Strategies

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Journal of Biosciences and Medicines 2024年第11期12卷 584-591页

作者： Ergun kaya Molecular Biology and Genetics Department Faculty of Science Mugla Sitki Kocman University Mugla Türkiye

Although climate changes are predicted to be an increasingly dominant threat to plant biodiversity, the degradation of ecosystems witnessed to date has been largely driven by factors such as human-induced habitat loss and fragmentation, overexploitation, pollution and the introduction of invasive species. Given the evidence that climate changes and anthropogenic pressures have greatly increased the extinction of natural populations of species, we can recognize that human-induced land use and climate changes are perhaps the greatest threats to terrestrial biodiversity. In this context, effective prioritization of conservation efforts is critical for the sustainability of biodiversity, as current environmental changes are likely to continue in the future. Countries with limited financial resources for conservation projects may be at greater risk from habitat loss, direct harvesting and invasive species, and may also lead to unsustainable exploitation of resources, further accelerating species loss through direct harvesting and causing rapid loss of biodiversity. In this context, the protection of biodiversity is an important issue that concerns the entire world population. Causes such as anthropogenic pressures, great fires, introduction of new species from different regions, invasion of cultivars and dominant species cause a dramatic impact on plant biodiversity as well as an increase in the number of threatened species. Plant biodiversity constitutes the natural source of products used in the food and pharmaceutical industries and also provides basic different raw materials. On the other hand, plant biodiversity is important in the development of species and more productive species that are more resistant to biological and environmental stresses, and in providing new genetic information for feeding programs. Advances in plant biotechnology, particularly in vitro cultures and molecular biology, have been a powerful tool in the control and conservation of plant biodiv

关键词： Biodiversity Biotechnology Cryopreservation In Vitro Conservation

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Dissolution of lateritic nickel ore using ascorbic acid as synergistic reagent in sulphuric acid solution

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Transactions of Nonferrous Metals Society of China 2018年第8期28卷 1652-1659页

作者： Sait KURSUNOGLU Zela Tanlega ICHLAS Muammer kaya Department of Materials Science & nanotechnology Engineering Abdullah Gul University Kayseri 38100 Turkey Department of Metallurgical Engineering Faculty of Mining and petroleum Engineering Institut teknologi Bandung Bandung 40132 Indonesia Division of Mineral processing Department of Mining Engineering eskisehir Osmangazi University Eskisetfir 26480 Turkey

The dissolution of nickel and cobalt from Caldag lateritic nickel ore using the combination of sulphuric and ascorbic acids was investigated. The use of other organic acids, namely citric, maleic and stearic acids, as synergistic reagents was studied for comparison. The results revealed that the use of ascorbic and citric acids markedly improved the dissolution of cobalt compared to the other two organic acids that only showed slight synergistic effect on the leaching rate. In terms of nickel dissolution, ascorbic acid is the most effective synergist, followed by citric, maleic and stearic acids in descending order. Under the most optimized conditions found in this study, i.e., using 1 mol/L of sulphuric acid with the presence of 4 g/L of ascorbic acid at 80 ℃and solid-to-liquid ratio of 1/10, more than 99% and 98% leaching rates of cobalt and nickel, respectively, can be achieved within 4 h of leaching. In addition, the leaching performance is relatively insensitive to the change of ascorbic acid concentration from 2 to 4 g/L which is highly desirable from operational perspective.

关键词： laterite ore Caldag lateritic nickel ore synergistic reagent ascorbic acid nickel cobalt

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Experimental determination of interfacial energies for Ag_2Al solid solution in the CuAl_2-Ag_2Al system

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Chinese Physics B 2009年第9期18卷 3952-3959页

作者： Ocak Y Akbulut S Keslioglu K Marasl1 N ad1rl1 E kaya H Department of Physics Faculty of Arts and SciencesErciyes University Department of Physics Institute of Science and TechnologyErciyes University Department of Physics Faculty of Arts and SciencesNigde University Department of Science Education Education FacultyErciyes University

The equilibrated grain boundary groove shapes of solid solution Ag2Al in equilibrium with an AI-Cu-Ag liquid were observed from a quenched sample with a radial heat flow apparatus. The Gibbs Thomson coefficient, solid liquid interfacial energy and grain boundary energy of the solid solution Ag2Al have been determined from the observed grain boundary groove shapes. The thermal conductivity of the solid phase and the thermal conductivity ratio of the liquid phase to solid phase for Ag2Al-28.3 at the %CuAl2 alloy at the melting temperature have also been measured with a radial heat flow apparatus and Bridgman type growth apparatus, separately.

关键词： solid-liquid interfaces metals and alloys surface energy thermal conductivity

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Constraints on unconsolidated pyroclastic flow sediments related REE enrichments originated from potassic-alkaline Gölcük stratovolcano: Darıdere-Direkli-Yakaören (DDY) table 4deposits, southwestern Anatolia of Turkey

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Acta Geochimica 2021年第6期40卷 926-944页

作者： Murat Budakoglu Ali Tugcan Unluer Zeynep Doner Huseyin Kocaturk Mustafa kaya Mustafa Kumral M.Sezai Kirikoglu Department of Geological Engineering Faculty of MinesIstanbul Technical UniversityIstanbulTurkey

In the last five decades,Rare Earth Elements(REE)are mostly produced from carbonatite complexes and alkaline magmatic *** this respect,pyroclastic flows produced by the potassic-alkaline Gölcük volcanism in the Isparta(SW,Turkey)angle stand out as an important target area where REE enrichments can be *** study focuses on the REE potential,geochemical and mineralogical characteristics of REE-bearing minerals as well as formation modeling of unconsolidated pyroclastic flows in Darıdere-Direkli-Yakaören(DDY)deposits in ***-bearing minerals of DDY deposits which contain abundant trachytic-trachyandesitic rock fragments were determined as fluorapatite,britholite,and chevkinite by using XRD and SEM–EDX *** to the geochemical analysis,the vast majority of RREE(up to 996 ppm)content is LREE such as La,Ce and ***ıdere is the most REE enriched region followed by Yakaören and Direkli regions in terms of LREE(574.9 ppm),relative to MREE(38.5 ppm)and HREE(5.28 ppm)*** results are also on par with subduction-related Italian extrusive carbonatites such as Polino,Cupaello and San *** DDY deposits can also be comparable with intraplate extrusive REE deposits in terms of LREE enrichments,however,HREE,Nb,Th and Zr values are generally *** RREE concentrations tend to rise with the increasing contents of alkaline elements(Na and K),HFSE(such as Nb and U),as well as LILE(Ba,Sr and Rb)and are negatively affected by sedimentary carbonate *** economic value of the DDY deposits can gain importance due to the increasing global demand for LREE’s.

关键词： Pyroclastic flows Rare Earth Elements(REE) Apatite Britholite Chevkinite Alkaline-Ultrapotasic magmatism

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