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Comparison of extraction abilities of deep eutectic solvents and aqueous acid solutions for extraction of rare earths and transition metals

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Journal of Rare Earths 2024年第6期42卷 1157-1164,I0006页

作者： Svetlana Drogobuzhskaya Margarita Frolova Andrey shishov Nikita Tsvetov Tananaev Institute of Chemistry-Subdivision of the Federal Research Centre《Kola Science Centre of the Russian Academy of Sciences》 18420926a AcademgorodokApatityRussia Murmansk State Technical University 183010Sportivnaja str.13MurmanskRussia Department of Analytical Chemistry Institute of ChemistrySaint Petersburg State UniversitySpbSU.1990347/9 Universitetskaya embSt.Petersburg Russia

In recent years,deep eutectic solvents have attracted increasing interest as effective extractants for the separation of both organic substances and metals from various ***-based deep eutectic solvents are most often used as extractants for the extraction of *** this work,for the first time,the extraction efficiency of transition metals and rare earth elements(Y,Zr,Nb,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Hf and Ta)from mining tailings and Na,K,Ca,Mg,Cu,Fe,Mn,Pb,Ba,Ni and Sr from biodiesel samples using acidic deep eutectic solvents and saturated aqueous solutions of the same acids(malonic,malic,tartaric and citric)is *** this,deep eutectic solvents based on acids and their aqueous saturated solutions were prepared and *** prepared mixtures were analyzed by IR spectroscopy to confirm the formation of eutectic *** such as the density and viscosity of the resulting mixtures were also investigated,as this can be of key importance for the efficiency of metal *** extraction of rare earth metals from mining tailings took a long time(up to several days),while the extraction of metals from fuel took no more than 30 *** emission spectral methods were used as an analysis *** is shown that the extraction efficiency with aqueous solutions is better than that with eutectic solvents,which casts doubt on the need for deep eutectic solvents use in this area.

关键词： Deepeutectic solvent Metal separation Elemental analysis Rare earth metals Biodiesel

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Why lowland riparian trees are difficult to use for streamflow reconstruction

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Journal of Forestry Research 2024年第3期35卷 219-230页

作者： Xiaomei Peng Shengchun Xiao Bao Yang Quanyan Tian Vladimir V.shishov Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000People's Republic of China School of Geography and Ocean Science Nanjing UniversityNanjing 210023People's Republic of China Institute of Fundamental Biology and Biotechnology Siberian Federal UniversityKrasnoyarskRussia 660041

Existing streamflow reconstructions based on tree-ring analysis mostly rely on species from upland,mainly montane areas,while lowland species(generally plain)areas are rarely *** limits the understanding of streamflow change history in the lowlands,which is an important basis for water resource *** study focused on Populus euphratica stands located along the main stream,eastern and western tributaries in the lower reaches of the Heihe River basin(HRb),in arid northwestern *** investigated how streamflow regulation interferes with ripar-ian trees in lowlands when they used for streamflow ***-ring width chronologies were developed and analyzed in conjunction with meteorological and hydrologic observation *** results show streamflow regulation leads in sharp fluctuations in the streamflow allocation between the eastern tributaries and western *** resulted in instability of the correlation between streamflow at the two tributaries and at the Zhengyixia hydrologic station,with corresponding fluctuations in radial growth of poplar trees on the banks of the two tributaries and at the *** regulation altered the natural patterns of seasonal streamflow below the station,changing the time window of poplar *** study provides useful insight into tree-ring width based streamflow reconstruction in the lowlands.

关键词： Tree-ring width-Dendrochronology Populus euphratica The Ejina Oasis Streamflow

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超导ECR离子源DECRIS-SC2(英文)

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Chinese Physics C 2007年第S1期31卷 23-26页

作者： V.V.Bekhterev S.L.Bogomolov V.I.Datskov V.M.Drobin S.N.Dmitriev A.A.Efremov V.N.Loginov A.N.Lebedev H.Malinowski V.V.Seleznev a.shishov G.P.Tsvineva N.YU.Yazvitsky B.I.Yakovlev JINR FLNRDubna141980Russia JINR LHEDubna141980Russia Electrotechnical Institute WarsawPoland

A new compact version of the"liquid He-free"superconducting Electron Cyclotron Resonance Ion Source,to be used as an injector for the U-400M cyclotron,is presently under construction at the FLNR in collaboration with LHE(JINR).The axial magnetic field of the source is created by the superconducting magnet,and the NdFeB hexapole is used for the radial plasma *** microwave frequency of 14GHz will be used for ECR plasma *** DECRIS-SC2 superconducting magnet is designed for the induction of a magnetic field on the axis of the source of up to 1.4T(extraction side)and 1.9T(injection side) at nominal current of *** of the coils is carried out by CM cryocooler with cooling power of 1W at the temperature *** basic design features of the superconducting magnet and of the ion source are *** main parts of the source are in *** first beam test of the source is expected in the beginning of 2007.

关键词： ECR superconducting

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Gold Determination by Electrothermal Atomic Absorption Spectrometry After Preconcentration Using Natural Deep Eutectic Solvent Based on Menthol and Camphor

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Journal of Analysis and Testing 2023年第4期7卷 435-443页

作者： Valeriia Maksimova Varvara Lapina Leonid Martynov Andrey shishov Olga Mokhodoeva Vernadsky Institute of Geochemistry and Analytical Chemistry Russian Academy of SciencesMoscow 119991Russian Federation Lomonosov Institute of Fine Chemical Technologies MIREA-Russian Technological UniversityMoscow 119454Russian Federation Department of Analytical Chemistry Institute of ChemistrySaint-Petersburg State UniversitySt.Petersburg 199034Russian Federation

A novel analytical procedure for the determination of gold by electrothermal atomic absorption spectrometry combined with selective liquid-liquid extraction by natural deep eutectic solvents(NADESs)is *** extraction ability of the NADESs prepared using menthol,thymol and camphor toward gold in hydrochloric acid solutions was *** extraction efficiency was improved by optimizing the parameters including the composition of the NADES s,the volume ratio of organic and aqueous phases,kinetics,and acidity of the *** determination of gold was carried out by electrothermal atomic absorption spectrometry directly in the NADES s phase dissolved in isopropyl *** extraction recovery of gold from 1 mol/L HCl with the NADESs based on menthol and camphor mixed in a molar ratio 1:1 was 99.7%at an enrichment factor of *** limits of detection and quantification of the proposed procedure were 1μg/L and 3.3μg/L,respectively,with a relative standard deviation of less than 5%.The developed procedure was applied for determination of gold in the certified reference material of ore,environmental and waste waters.

关键词： Gold Liquid-liquid extraction Menthol/camphor Natural deep eutectic solvents(NADESs) Electrothermal atomic absorption spectrometry(ETAAS)

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The forecast of seasonal precipitation trend at the north Helan Mountain and Baiyinaobao regions, Inner Mongolia for the next 20 years

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Chinese Science Bulletin 2004年第4期49卷 410-415页

作者： LIU Yu V. shishov SHI Jiangfeng E. Vaganov SUN Junyan CAI Qiufang I. Djanseitov AN Zhisheng State Key Laboratory of Loess and Quaternary Geology The Institute of Earth Environment Chinese Academy of Sciences Xi'an 710075China Sukachev Institute of Forest Russian Academy of Sciences Kras-noyarsk 660036 Russia

By using Caterpillar-SSA analysis method, through the process of embedding, singular value decompo-sition, grouping and diagonal averaging, the seasonal pre-cipitation trend at north Helan Mountain and Baiyinaobo regions, Inner Mongolia for the next 20 years is forecasted. The results show an increasing precipitation trend from 1992 to 2004. In the subsequent decade the precipitation should reduce quickly, and it will reach a minimum near 2012 to 2014 in both regions. The drought caused by the decrease of the precipitation from May to July in the north Helan Mountain area during the period of 2013—2014 is probably quite similar to that around 1929. Further, the period of pre-cipitation gradual increase follows in the researched regions.

关键词：贺兰山内蒙古季降水量预测气候变化

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Reconstruction of May——July precipitation in the north Helan Mountain, Inner Mongolia since A.D. 1726 from tree-ring late-wood widths

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Chinese Science Bulletin 2004年第4期49卷 405-409页

作者： LIU Yu SHI Jiangfeng V. shishov E. Vaganov YANG Yinke CAI Qiufang SUN Junyan WANG Lei I. Djanseitov State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi' an 710075China Sukachev Institute of Forest Russian Academy of Sciences Kras-noyarsk 660036 Russia

By analyzing statistical characteristics of five tree-ring standard chronologies, early-wood ring width (EWW), late-wood ring width (LWW), total ring width (TRW), minimum early-wood density (MinD), maximum late-wood density (MaxD) and, their climatic response re-spectively, we reconstructed the May to July precipitation using late-wood ring width (LWW) over the north Helan Mountain since A.D. 1726. The explained variance is 42% (R2adj = 41%, F = 31.46, p < 0.000001). After 11-a moving average, the explained variance reaches 82% (F = 156.9, p < 0.05). On the decadal scale, the rainfall reconstruction of the northern Helan Mountain displays a quite similar variation pattern with that of the April to early July precipitation in Baiyinaobao, east of Inner Mongolia for the last 150 years. It may reflect the intensity variation of the East Asia Summer Monsoon front to a certain extent. Spectrum analysis shows 11-a and 22-a periodicities in the May to July precipitation reconstruction at the north Helan Mountain.

关键词：内蒙古年代学贺兰山树木气候学降水量统计

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贺兰山油松生长的气候响应机制初步探讨

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第四纪研究 2005年第2期25卷 245-251页

作者：史江峰刘禹 E.Vaganov 蔡秋芳 V.shishov 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室中国科学院研究生院北京100039 西安交通大学能源与动力工程学院环境工程系西安710049 Sukachev Institute of Forest Russian Academy of Sciences Krasnoyarsk660036 Russia

应用Vaganov-Shashkin模型对贺兰山油松的生长变化作了拟合, 发现4～8月的降水量大小决定了该年树木生长的宽度变化, 另外, 除5月外的1～8月份温度和树木生长的负相关是因为较高的温度不利于土壤中水分的保持, 间接地导致树木生长的减慢... 详细信息

应用Vaganov-Shashkin模型对贺兰山油松的生长变化作了拟合, 发现4～8月的降水量大小决定了该年树木生长的宽度变化, 另外, 除5月外的1～8月份温度和树木生长的负相关是因为较高的温度不利于土壤中水分的保持, 间接地导致树木生长的减慢. VS模型在贺兰山地区取得了良好的拟合效果, 更为符合树木生长的生理学意义. 通过拟合序列和3个采样点树轮宽度序列的对比发现, 拟合序列代表着一个较大范围树轮宽窄的变化. 坡向对树木生长的影响较大, 甚至超过了海拔高度和距离的影响, 故建议树木年轮气候学采样应沿着同一坡向采样.

关键词：贺兰山油松气候响应

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DETECTOR BASED APPROACH IN HIGH BRIGHTNESS LED MEASUREMENTS

DETECTOR BASED APPROACH IN HIGH BRIGHTNESS LED MEASUREMENTS

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26th Session of the CIE

作者： Aliev Eugeny Anikin Peter Azyzyan Henry shishov Alexander Stakharny Sergey Stolyarevskaya Raisa ACOL TECHNOLOGIES S.A.

Being one of the focal points of light and engineering research of the 21century,LED measurements is a very relevant subject *** performance measurements and lack of unified standards continue to represent a challenge for the LED *** an in-house LED and Chip Research & Diagnostic Laboratory,company is able to ensure the compliance of the developed products with the international standards in the field of photometry and radiometry and conducts an independent research of its own focusing on the major industry LED measurement challenges,selective results of which are shared in this presentation based on the findings of the research conducted by ACOL Technologies LED and Chip Research & Diagnostic Laboratory and tackles a number of questions related to the methods of measurements,instruments and their calibration,results of measurements of LED applications on the basis of absolute detector-based photometry and radiometry and relative spectrum measurements.

关键词： Photometric head spectral responsivity spectral distribution of irradiance colour correction factor lumen-equivalent

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应用跌倒生物力学分析老年人髋部骨折风险:一项长期护理中视频捕捉跌倒的队列研究(摘译)

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伤害医学（电子版） 2022年第3期11卷 60-64页

作者：何卓谚(摘译) 杨怿健李丽萍(审校) Yijian Yang Vicki Komisar Nataliya.shishov Bryan Lo Alexandra MB Korall Fabio Feldman Stephen N Robinovitch 香港中文大学体育运动科学系中国香港999077 汕头大学公共卫生学院汕头51504 不详

跌倒导致了95%以上的老年人髋部骨折。几乎25%髋部骨折患者会在发生骨折1年内死亡,50%患者的自理能力大幅下降。跌倒和髋部骨折的发生率在长期护理(long-term care,LTC)的老年人中尤其高。由于长期接受护理的老年人普遍存在肢体和认知障... 详细信息

跌倒导致了95%以上的老年人髋部骨折。几乎25%髋部骨折患者会在发生骨折1年内死亡,50%患者的自理能力大幅下降。跌倒和髋部骨折的发生率在长期护理(long-term care,LTC)的老年人中尤其高。由于长期接受护理的老年人普遍存在肢体和认知障碍,在社区居住的老年人中能有效预防跌倒的策略(如:运动)在LTC设施中并不成功。因此,有必要了解跌倒的影响因素,改进现有的预防策略,并采取新的预防方法。

关键词：髋部骨折长期护理自理能力预防跌倒队列研究视频捕捉生物力学分析认知障碍

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以树轮晚材宽度重建公元1726年以来贺兰山北部5～7月降水量

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科学通报 2004年第3期49卷 265-269页

作者：刘禹史江峰 V.shishov E.Vaganov 杨银科蔡秋芳孙军艳王雷 I.Djanseitov 中国科学院地球环境研究所 Sukachev Institute of Forest Russian Academy of SciencesKrasnoyarsk660036Russia

通过分析早材宽度(EWW)、晚材宽度(LWW)、整轮宽度(TRW)、最小密度(Dmin)和最大密度(Dmax)共计5个树轮标准年表的统计特征及其各自气候响应,最终以晚材宽度对贺兰山北部公元1726年以来5-7月的降水进行了重建,方差解释量42％(Radj2=0.41,... 详细信息

通过分析早材宽度(EWW)、晚材宽度(LWW)、整轮宽度(TRW)、最小密度(Dmin)和最大密度(Dmax)共计5个树轮标准年表的统计特征及其各自气候响应,最终以晚材宽度对贺兰山北部公元1726年以来5-7月的降水进行了重建,方差解释量42％(Radj2=0.41,F=31.46,P<0.000001).11年滑动平均后,方差解释量达82％(F=156.9,P<0.05).重建降水序列在10年际尺度上与内蒙古东部白音敖包地区4-7月上旬降水具有相当好的一致性,在一定程度上反映了东亚夏季风锋面强弱的变化.谱分析检测出贺兰山北部5-7月降水序列主要存在11和22年的波动周期.

关键词：树轮晚材宽度 1726年贺兰山降水量油松降水序列树轮气候学

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