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Preparation of Manganese Oxide and Its Adsorption Properties

Journal of wuhan University of Technology(Materials Science) 2024年第4期39卷 1031-1040页

作者：贺跃王海峰 YAng Pan w.ng Song CHEN xiaoliang YAng Chunyuan 王家伟 School of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Guizhou Provincial Engineering Technology Research Center of Manganese Materials for Batteries Tongren Guizhou 554300China Guizhou Provincial Key Laboratory of Metallurgical Engineering and Energy Saving Guiyang 550025China

The in-situ oxidation of manganese sulfate solution with H2O_(2),sodium hypochlorite,potassium permanganate and oxygen as oxidants was investigated by means of SEM,EDS,XRD,BET and infrared analysis,and the effects of different oxidants on the morphology,phase composition,surface properties and specific surface area of manganese oxides were *** experimental results show that the diameter of manganese oxide particles prepared with H_(2)O_(2)is the smallest,about 50 nm,and the specific surface area is the largest,63.8764 m^(2)/*** has the advantages of abundant surface hydroxyl groups,no introduction of other impurities and large adsorption *** is most suitable to be used as an oxidant for oxidizing manganese sulfate solution to prepare manganese oxide by in-situ *** manganese oxide prepard by H_(2)O_(2)in-situ oxidation method is used as adsorbent to adsorb cobalt and nickel impurities in manganese *** the reaction pH is 6,the reaction time is 30min and the amount of adsorbent is 1.0 g,the adsorption rates of cobalt and nickel impurities in 100ml manganese sulfate solution are 97.59%and 97.67%,*** residual amounts of cobalt and nickel meet the industrial process standard of first-class products(Co,Ni w/%≤0.005)of high-purity manganese sulfate(Hg/t4823-2015)for *** study plays a guiding role in the preparation and regulation of manganese oxide,and provides a new method with high efficiency,purity and adsorbent availability for the preparation of high-purity manganese sulfate solution.

关键词： manganese oxide in situ oxidation adsorbent regulation mechanism physical chemical properties

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The use of electrokinetics promises a sustainable mining future

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The Innovation 2024年第3期5卷 17-18页

作者： Gaofeng w.ng xiaoliang Liang Jianxi Zhu Hongping He CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Material Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China University of the Chinese Academy of Sciences Beijing 100049China

Moving toward a zero-carbon economy is an ambitious goal of all human *** of various metal resources plays a central role in such a *** earth elements(REEs),especially heavy REEs(HREEs),are crucial for the development of future green and zero-carbon economies due to their irreplaceable roles in many applications of renewable energy technologies;e.g.,solar panels,wind turbines,and hybrid vehicle ***-adsorption rare earth deposits(IADs)are the primary repositories for HREEs and supply more than 95%of the global HREE demand.1 However,current mining technologies using excessive ammonium salts have caused devastating harm to the local environment while exhibiting a low recovery rate of REEs,a long mining period,and landslide *** 2018,the adoption of ammonium salt-based techniques in REE mining has been prohibited,exacerbating the scarcity of REEs that could lead to disruptions of the supply ***,metals are currently almost exclusively extracted from their ores via physical excavation or chemical *** energy-intensive and environmentally damaging techniques remain among the foremost CO_(2) *** mining industry is in desperate need of a new generation of mining technology.

关键词： mining replace earth

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Novel Batch Polishing Method of Ceramic Cutting Inserts for Reducing Tool wear

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Chinese Journal of Mechanical Engineering 2024年第4期 87-96页

作者： Rui Gao Chunjin w.ng Yee Man Loh xiaoliang Liang Chen Jiang Chi Fai Cheung State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic University College of Mechanical Engineering University of Shanghai for Science and Technology

Ceramic cutting inserts are a type of cutting tool commonly used in high-speed metal cutting ***, the wear of these inserts caused by friction between the workpiece and cutting inserts limits their overall effectiveness. In order to improve the tool life and reduce wear, this study introduces an emerging method called magnetic field-assisted batch polishing(MABP) for simultaneously polishing multiple ceramic cutting inserts. Several polishing experiments were conducted under different conditions, and the wear characteristics were clarified by cutting S136H steel. The results showed that after 15 min of polishing, the surface roughness at the flank face,edge, and nose of the inserts was reduced to below 2.5 nm, 6.25 nm, and 45.8 nm, respectively. Furthermore, the nose radii of the inserts did not change significantly, and there were no significant changes in the weight percentage of elements before and after polishing. Additionally, the tool life of the batch polished inserts was found to be up to 1.75 times longer than that of unpolished inserts. These findings suggest that the MABP method is an effective way to mass polish ceramic cutting inserts, resulting in significantly reduced tool wear. Furthermore, this novel method offers new possibilities for polishing other tools.

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丙烯墨水中颗粒相分散性问题研究

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中国制笔 2024年第3期 30-36页

作者：潘勤敏张胜红林韶晖钱宵亮 ng Flor a T.T. 金桂英苏州大学江苏苏州215123 苏州雄鹰笔墨新材料有限公司江苏苏州215200 滑铁卢大学加拿大安大略省滑铁卢N2L 3G1

针对丙烯墨水中普遍存在的颗粒相分散问题,在对颗粒沉降原理进行简要介绍的基础上,就丙烯酸树脂的选择和改性,颗粒相的处理技术,分散剂、稳定剂、增稠剂等的研究进行了综述。

关键词：丙烯酸树脂墨水钛白粉沉降

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基于纳米抗体-荧光素酶的黄曲霉毒素B1检测方法构建

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中国食品学报 2024年第4期24卷 349-360页

作者：陈文星王凤华谭晓亮晏石娟张军吴绍文甘肃农业大学资源与环境学院兰州730070 猪禽种业全国重点实验室广东省农作物种质资源保存和利用重点实验室广东省农业科学院农业生物基因研究中心广州510640

黄曲霉毒素B1(AFB1)是一种剧毒、致癌的食源性污染物,严重威胁食品安全和公共健康。为开发快速检测AFB1的生物发光酶联免疫分析(BLEIA)方法,系统测试了3种抗AFB1特异性纳米抗体(NB)与纳米荧光素酶(Nluc)融合蛋白(G8-Nluc、Nluc-NB26和Nl... 详细信息

黄曲霉毒素B1(AFB1)是一种剧毒、致癌的食源性污染物,严重威胁食品安全和公共健康。为开发快速检测AFB1的生物发光酶联免疫分析(BLEIA)方法,系统测试了3种抗AFB1特异性纳米抗体(NB)与纳米荧光素酶(Nluc)融合蛋白(G8-Nluc、Nluc-NB26和Nluc-NB28)的可溶性表达、纯化情况及酶催化活性。基于3种融合蛋白分别建立BLEIA检测体系,选择Nluc-NB26用于谷物样品的分析和验证。结果表明,Nluc-NB26的可溶性表达量最高,稳定性更好,Nluc-NB28的可溶性表达量次之,而G8-Nluc基本不可溶。不同表面活性剂对G8-Nluc的促溶解性研究表明,添加N-月桂酰肌氨酸钠可显著提高其溶解度,纯化得到的3种融合蛋白均具有良好的酶活性及抗原结合活性。基于融合蛋白的BLEIA检测结果显示,Nluc-NB28-BLEIA、G8-Nluc-BLEIA和Nluc-NB26-BLEIA体系检测AFB1的IC_(50)值分别为4.213,1.697,2.169 ng/mL,表明G8-Nluc-BLEIA体系的灵敏度最高,Nluc-NB26-BLEIA与前者接近,Nluc-NB28-BLEIA最低。综合考虑融合蛋白的可溶性表达量、稳定性及检测性能,对Nluc-NB26-BLEIA开展实际样品的分析和验证,结果表明:这一方法检测谷物中AFB1的平均回收率在91.1%~104.1%之间,与商业化酶联免疫吸附测定试剂盒结果相似,而检测的时间和试剂成本明显降低。研究结果为开发快速、高灵敏的AFB1检测技术提供参考。

关键词：黄曲霉毒素B1 纳米抗体纳米荧光素酶快速检测生物发光酶联免疫分析

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注射用头孢唑肟钠有关物质测定方法的建立

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中国抗生素杂志 2024年第3期49卷 348-354页

作者：张秉华王小亮梁亚伟席志芳牛龙青陕西省食品药品检验研究院西安710065

目的建立注射用头孢唑肟钠有关物质HPLC分析方法并对国产样品杂质情况行分析。方法采用Agilent Zorbax SB-C_(18)(250 mm×4.6 mm,5μm)色谱柱,柱温:35℃,流动相:以pH3.6乙酸铵溶液为流动相A,乙腈为流动相B,线性梯度洗脱:0→10 min,97%A... 详细信息

目的建立注射用头孢唑肟钠有关物质HPLC分析方法并对国产样品杂质情况行分析。方法采用Agilent Zorbax SB-C_(18)(250 mm×4.6 mm,5μm)色谱柱,柱温:35℃,流动相:以pH3.6乙酸铵溶液为流动相A,乙腈为流动相B,线性梯度洗脱:0→10 min,97%A→90%A;10→20 min,90%A→80%A;20→30 min,80%A;30→35 min,80%A→15%A;35→45 min,15%A;45→46 min,15%A→97%A,46→55 min,97%A;流速:0.8 mL/min,检测波长:254 nm,进样量:20μL。结果酸、碱、氧化、高温、光照强制降解试验证明方法的专属性良好;头孢唑肟及头孢唑肟诸分别在0.75~4.5μg/mL浓度范围内线性关系良好;头孢唑肟及10种已知杂质(杂质18、开环脱羧S-氧化物1、开环脱羧S-氧化物2、杂质KTO、杂质16、杂质6、杂质3、杂质13、二聚体及杂质12)的定量限分别为1.63、6.30、2.78、2.84、2.31、7.86、3.06、1.62、1.90、3.87和3.09 ng;各已知杂质平均回收率均在“96.5%~101.6%”之间;重复性RSD均符合要求。结论所建立的方法专属性、准确性及耐用性均良好,可用于注射用头孢唑肟钠有关物质的检测。

关键词：头孢唑肟钠有关物质高效液相杂质检测

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A Discussion on Two Stochastic Elliptic Modeling Strategies

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Communications in Computational Physics 2012年第3期11卷 775-796页

作者： xiaoliang wan Department of Mathematics and Center for Computation and Technology Louisiana State UniversityBaton RougeLA 70803USA

Based on the study of two commonly used stochastic elliptic models:I:−∇·(a(x,w)·∇u(x,w))=f(x)and II:−∇·(a(x,w)⋄∇u(x,w))=f(x),we constructed a new stochastic elliptic model III:−∇·(a^(−1))^(⋄(−1))⋄∇u(x,w)=f(x),in[20].The difference between models I and II is twofold:a scaling factor induced by the way of applying thewick product and the regularization induced by thewick product ***[20],we showed that model III has the same scaling factor as model *** this paper we present a detailed discussion about the difference between models I and III with respect to the two characteristic parameters of the random coefficient,i.e.,the standard deviation s and the correlation length *** results are presented for both one-and twodimensional cases.

关键词： wiener chaos stochastic PDE stochastic modeling stochastic finite element method

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Properties, Phases and Microstructure of Microwave Sintered w-20Cu Composites from Spray Pyrolysis-continuous Reduction Processed Powders

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Journal of wuhan University of Technology(Materials Science) 2012年第1期27卷 38-44页

作者： TAO Jianqin SHI xiaoliang State Key Laboratory of Advanced Technology for Materials Synthesis&Processing Wuhan University of TechnologyWuhan 430070 China School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan 430070China

The effects of microwave sintering on the properties, phases and microstructure of w-2OCu alloy, using composite powder fabricated by spray pyrolysis-continuous reduction technology, were investigated. Compared with the conventional hot-press sintering, microwave sintering to w-2OCu composites could be achieved with lower sintering temperature and shorter sintering time. Furthermore, microwave sintered w-Cu composites with high densification, homogenous microstructure and excellent properties were obtained. Microwave sintering could also result in finer microstructures. ：~

关键词： w-2OCu composite powder spray pyrolysis-continuous reduction microwave sintefing

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Improved estimation of PM_(2.5) brown carbon contributions to filter light attenuation

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Particuology 2021年第3期19卷 1-9页

作者： Judith C.Chow L.-w.Antony Chen xiaoliang w.ng Mark C.Green John G.watson Division of Atmospheric Sciences Desert Research InstituteRenoNVUSA State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’anChina Graduate Faculty Department of Atmospheric SciencesUniversity of NevadaReno NevadaUSA Department of Environmental and Occupational Health School of Public HealthUniversity of NevadaLas VegasNVUSA

Multiwavelength light attenuation measurements have been acquired as part of thermal/optical carbon analysis in the *** Speciation Network(CSN)and the Interagency Monitoring of PROtected Visual Environments(IMPROVE)network beginning in *** are used to estimate PM_(2.5)brown carbon(BrC)contributions to light absorption at various wavelengths,a useful method for separating biomass burning contributions from other *** of light transmitted through the filter deviates from Beers Law as the mass of light absorbing materials *** study estimates the effects of these deviations with empirical adjustment factors applied to samples for CSN from 2016 to 2017 and for IMPROVE from 2016 to *** for the filter loading effect results in an annual average increase of∼6-7%BrC contribution to light attenuation:from 3.6%to 10.7%for the urban,more heavily loaded CSN samples;and from 23.7%to 29.5%for the non-urban IMPROVE *** alternative method is examined for BrC and black carbon(BC)adjustments by calculating the AbsorptionÅngström Exponent(AAE)for BC(i.e.,AAE_(BC))based on the ratios of 635 nm/780 nm light attenuation rather than assuming AAE_(BC)of *** paired-wavelength calculations result in a median AAE_(BC)of 0.76 for CSN and 0.8 for IMPROVE,with the majority of samples(i.e.,91%of CSN and 70%of IMPROVE)show.ng AAE_(BC)ng negligible contributions from BrC to AAE at longer wavelengths,the amount of light attenuation at shorter wavelengths(e.g.,405 nm)where BrC is dominant can be *** paired-wavelength method applied to the filter loading adjusted data has a greater effect on urban(fresh)than on non-urban(aged)aerosols,resulting in a factor of two increase in annual averaged BrC light attenuation(from 10.7%to 21.6%)for CSN and by a factor of 1.11(from 29.5%to 32.7%)for IMPROVE *** result demonstrates the importance of particle loading and AAE correction on quantifying BrC light attenuatio

关键词： Organic carbon Brown carbon Elemental carbon Black carbon AbsorptionÅngström Exponent

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声波激励下w型火焰锅炉燃烧特性的试验研究

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动力工程学报 2024年第8期44卷 1163-1172页

作者：杨延锋梁建国韩峰薛晓亮杨洋李新卓长沙理工大学能源与动力工程学院长沙410114 阳城国际发电有限责任公司山西晋城048100 山东戈尔环境科技有限公司济南250000

为探究声波助燃技术在w型火焰锅炉中的应用潜力,试验研究了实时负荷为315 Mw的w型火焰锅炉在声波激励作用下的燃烧特性。在锅炉主燃区、燃尽区分别交错布置12台和4台声波激励装置,每3台1组循环投运,驱动声波激励装置工作的电机频率为35 ... 详细信息

为探究声波助燃技术在w型火焰锅炉中的应用潜力,试验研究了实时负荷为315 Mw的w型火焰锅炉在声波激励作用下的燃烧特性。在锅炉主燃区、燃尽区分别交错布置12台和4台声波激励装置,每3台1组循环投运,驱动声波激励装置工作的电机频率为35 Hz,相应进气压力维持在0.35~0.47 MPa。试验中,通过电厂集控室集散控制系统(DCS)监测记录了脱硝塔A/B侧进口NO_(x)质量浓度、脱硫装置进口SO_(x)质量浓度和机组煤耗的变化。结果表明:投入声波激励装置后,脱硝塔A/B侧进口NO_(x)质量浓度分别下降了6.08%、5.47%,SO_(x)质量浓度下降了1.24%,机组平均煤耗下降了1.5 g/(kw·h);对省煤器和空气预热器出口的灰分采样分析发现,与无声波激励的情况相比,飞灰含碳质量分数分别下降了1.64%和1.70%,声波助燃技术能有效提高w型火焰锅炉的热效率和降低污染物排放。

关键词：声波助燃 w型火焰锅炉煤耗机组负荷飞灰含碳量

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