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Isothermal Adsorption Characteristics and Kinetics of Cr Ions onto Ettringite

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Journal of Wuhan University of Technology(Materials Science) 2019年第3期34卷 587-595页

作者： WANG Xin CUI Suping School of Materials Science and Engineering Beijing University of TechnologyBeijing100124China China Building Materials Academy State Key Laboratory of Green Building MaterialsBeijing100024China

The isothermal absorption properties and kinetic model of Cr(VI) and Cr(III) onto ettringite were investigated using the batch adsorption method. IR analysis was used to study the difference and mechanism of the adsorption of chromium ions with different valence states. The results show that the adsorption of Cr(III) onto ettringite at 20 ℃ agrees with Langmuir’s isothermal model. The ion binding stability was significantly greater than that of Cr(VI). While the adsorption of Cr(VI) onto ettringite agrees with Freundlich’s isothermal model, the D-R model fits the adsorption isotherms of two types of valence Cr(R2>0.994). It can be concluded that the adsorption of Cr(III) onto ettringite is mainly by chemical adsorption and that the adsorption of Cr(VI) onto ettringite is mainly by physical adsorption. Dynamic model fitting and model parameter analyses show that the adsorption of Cr(III) onto ettringite agrees with the pseudo second order kinetics model given by Lagergren. The formation of chemical bonds is the main factor causing the fast adsorption. Cr(VI) adsorption is mainly dominated by liquid film diffusion, and the adsorption rate is much slower than that of Cr(III) adsorption.

关键词： ettringite Cr adsorption kinetics mechanism

Graphene Aerogel Composites with Self‑Organized Nanowires‑Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 533-547页

作者： Xiao You Huiying Ouyang Ruixiang Deng Qiuqi zhang Zhenzhong Xing Xiaowu Chen Qingliang Shan jinshan Yang Shaoming Dong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory of Inorganic Coating Materials CAS Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Structural Ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China University of Chinese Academy of Sciences Beijing 100039People’s Republic of China

With vigorous developments in nanotechnology,the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave ***,a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss *** macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires(SiC_(nws))grown in situ,while boron nitride(BN)interfacial structure is introduced on graphene *** unique composite structure forces multiple scattering of incident EMWs,ensuring the combined effects of interfacial polarization,conduction networks,and magnetic-dielectric ***,the as-prepared composites present a minimum reflection loss value of−37.8 dB and a wide effective absorption bandwidth(EAB)of 9.2 GHz(from 8.8 to 18.0 GHz)at 2.5 ***,relying on the intrinsic high-temperature resistance of SiC_(nws) and BN,the EAB also remains above 5.0 GHz after annealing in air environment at 600℃ for 10 h.

关键词： Hierarchical porous structure Interface High-temperature resistance Graphene aerogel composites Electromagnetic wave absorption

Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd_(3)P_(2)(S_(1−x)Se_(x))_(8)

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Chinese Physics Letters 2022年第6期39卷 18-23页

作者： Shuo Li Shuo Han Shaohua Yan Yi Cui Le Wang Shanmin Wang Shanshan Chen Hechang Lei Feng Yuan jinshan zhang Weiqiang Yu Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China Department of Physics Southern University of Science&TechnologyShenzhen 518055China College of Physics Qingdao UniversityQingdao 266071China

We performed high-pressure transport studies on the flat-band Kagome compounds,Pd_(3)P_(2)(S_(1−x)Se_(x))_(8)(x=0,0.25),with a diamond anvil *** both compounds,the resistivity exhibits an insulating behavior with pressure up to *** pressure above 20GPa,a metallic behavior is observed at high temperatures in Pd_(3)P_(2)S_(8),and superconductivity emerges at low *** onset temperature of superconducting transition T_(C) rises monotonically from 2K to 4.8K and does not saturate with pressure up to *** the Se-doped compound Pd_(3)P_(2)(S_(0.75)Se_(0.25))_(8),the T_(C) is about 1.5K higher than that of the undoped one over the whole pressure range,and reaches 6.4K at *** upper critical field with field applied along the c axis at typical pressures is about 50%of the Pauli limit,suggesting a 3D *** Hall coefficient in the metallic phase is low and exhibits a peaked behavior at about 30 K,which suggests either a multi-band electronic structure or an electron correlation effect in the system.

关键词： behavior metallic resistivity

NMR Evidence of Antiferromagnetic Spin Fluctuations in Nd_(0.85)Sr_(0.15)NiO_(2)

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Chinese Physics Letters 2021年第6期38卷 61-66页

作者： Yi Cui Cong Li Qing Li Xiyu Zhu Ze Hu Yi-feng Yang jinshan zhang Rong Yu Hai-Hu Wen Weiqiang Yu Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China National Laboratory of Solid State Microstructures and Department of Physics Center for Superconducting Physics and MaterialsCollaborative Innovation Center for Advanced MicrostructuresNanjing UniversityNanjing 210093China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China

Despite the recent discovery of superconductivity in Nd_(1-x)Sr_(x)NiO_(2) thin films,the absence of superconductivity and antiferromagnetism in their bulk materials remains a *** we report the 1H NMR measurements on powdered Nd0.85Sr0.15NiO2 samples by taking advantage of the enriched proton concentration after hydrogen *** find a large full width at half maximum of the spectrum,which keeps increasing with decreasing the temperature T and exhibits an upturn behavior at low *** spin-lattice relaxation rate ^(1)T_(1)^(-1) is strongly enhanced when lowering the temperature,developing a broad peak at about 40 K,then decreases following a spin-wave-like behavior ^(1)T_(1)^(-1)∝T^(2) at lower *** results evidence a short-range glassy antiferromagnetic ordering of magnetic moments below 40 K and dominant antiferromagnetic fluctuations extending to much higher *** findings reveal the strong electron correlations in bulk Nd_(0.85)Sr_(0.15)NiO_(2),and shed light on the mechanism of superconductivity observed in films of nickelates.

关键词： behavior ferromagnetic superconductivity

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当代日本的民族保守主义:生成、概念和释疑

日本学刊 2007年第3期 5-21页

作者：张进山中国社会科学院日本研究所

冷战后国际政治格局的重组和日本国内政治生态的变化,是日本“民族保守主义”生成的主要背景。这一概念的提出,源于当今日本政治自身变化的客观存在和对其理论研究的现实需要。作为一种“主义”,它已成为今天日本主流派政治家的政治理... 详细信息

冷战后国际政治格局的重组和日本国内政治生态的变化,是日本“民族保守主义”生成的主要背景。这一概念的提出,源于当今日本政治自身变化的客观存在和对其理论研究的现实需要。作为一种“主义”,它已成为今天日本主流派政治家的政治理念和保守政党的政策实践,引领着日本走向其心目中既定的“政治大国”目标。就国内有些学者对这一概念比较关心的几个学术上的问题,本文进行了阐释和说明。

关键词：民族保守主义生成背景概念界定学术释疑

两岸政策的话语比较及创新路径初探——以“一个中国”话语为例

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台湾研究集刊 2012年第5期 42-48页

作者：张晋山厦门大学台湾研究院福建厦门361005 桂林电子科技大学公共事务学院广西桂林541004

1949年以来,在两岸不同的政治社会制度和意识形态之下,形成两个存在明显差异性的政治话语系统,这种差异性代表性地体现在两岸官方政策文本。本文以两岸政策话语的概念界定为研究起点,选择"一个中国"作为分析样本,进行两岸政策话语的比... 详细信息

1949年以来,在两岸不同的政治社会制度和意识形态之下,形成两个存在明显差异性的政治话语系统,这种差异性代表性地体现在两岸官方政策文本。本文以两岸政策话语的概念界定为研究起点,选择"一个中国"作为分析样本,进行两岸政策话语的比较。研究发现两岸政策话语差异的实质,是两岸两个竞争中的政权基于各自的权威性需要而争夺话语上的主导权。两岸政策话语差异已严重影响两岸政治对话和政治谈判,甚至影响到两岸民众的相互理解和共识的建立。

关键词：两岸关系政策话语分析

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两岸政治定位话语谱系下的“一国两区”考辨

台湾研究集刊 2013年第3期 32-39页

作者：张晋山厦门大学台湾研究院福建厦门361005 桂林电子科技大学公共事务学院广西桂林541004

本文的基本目的是探求两岸政治定位的话语构建路径。求证"一国两区"能否恰当、有效地表述两岸之间的政治定位,成为两岸共同话语的又一组成,则是笔者行文的基本立足点。为达此目的,全文的基本假设是台海之间的政治互动正在构建一个有关... 详细信息

本文的基本目的是探求两岸政治定位的话语构建路径。求证"一国两区"能否恰当、有效地表述两岸之间的政治定位,成为两岸共同话语的又一组成,则是笔者行文的基本立足点。为达此目的,全文的基本假设是台海之间的政治互动正在构建一个有关两岸政治定位的话语谱系,要说明的问题是:在这一话语谱系之下,两岸政治定位呈现出怎样的认知图景;"一国两区"的话语属性以及被纳入大陆对台政策话语的几率可能;为进一步推动和平发展的两岸关系,"一国两区"话语又有着怎样的改进空间和方法路径。

关键词： “一国两区” 政治定位话语谱系

Application of Ultrasonic Measurement Technology in Breeding of Beef Cattle and Its Evaluation before Slaughtering

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Animal Husbandry and Feed Science 2015年第2期7卷 61-66,110页

作者： zhang Yang Yan Xiangmin Zhou Zhenyong zhang jinshan Li Hongbo Li Na Yuan Lixing Introduced Variety Breeding Expert Team of Reproducing Genetic Breeding Research Department National Beef Cattle Industry Technology System Xinjiang Beef Cattle Engineering Research Center

The live cattle eye muscle area, back-fat thickness, height of eye muscle and intramuscular fat content were determined by ultrasonic technology. The prediction model for meat production performance was established. The numerical value had high reliability and accuracy, which reached extremely significant difference via analysis of variance. The study provides scientific basis for breeding and meat evaluation of beef cattle.

关键词： Xinjiang brown cattle Eye muscle area Back-fat thickness

脾血管结扎术与脾切除术影响脾功能的动物实验研究

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中华小儿外科杂志 2023年第6期44卷 508-513页

作者：张金山李龙首都儿科研究所普外科北京100020

目的明确脾血管结扎术与脾切除术对脾脏功能的影响。方法将32只6~8周龄雄性SD大鼠按随机数字表法平均分为4组:正常组、对照组、脾血管结扎组和脾切除组。正常组不做任何操作;对照组仅进行开腹操作;脾血管结扎组采用结扎大部分脾动静脉... 详细信息

目的明确脾血管结扎术与脾切除术对脾脏功能的影响。方法将32只6~8周龄雄性SD大鼠按随机数字表法平均分为4组:正常组、对照组、脾血管结扎组和脾切除组。正常组不做任何操作;对照组仅进行开腹操作;脾血管结扎组采用结扎大部分脾动静脉血管的方法进行模型制作;脾切除组采用脾切除的方法进行模型制作。记录手术时间、失血量、胃肠道功能恢复时间(首次进食时间)。收集正常组和术后1个月时对照组、脾血管结扎组和脾切除组的血液样本,用于脾功能的检测(机体免疫功能、脾清除功能和抗感染能力)。采用流式细胞术检测细胞免疫水平(CD3+T淋巴细胞、CD4+T淋巴细胞、CD8+T淋巴细胞所占比例,并统计CD4+T/CD8+T细胞计数比值)和酶联免疫吸附试验检测体液免疫水平[血清免疫球蛋白(immunoglobulin,Ig)G、IgA和IgM水平、外周血白细胞介素(interleukin,IL)-1β、IL-2、IL-6、转化生长因子-β1(transforming growth factor-β1,TGF-β1)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平]评价机体免疫功能。采用示差显微镜计数痘痕红细胞出现率评价脾的清除功能。采用内毒素试剂盒检测内毒素水平评价脾的抗感染能力。采用血常规检测红细胞、白细胞、血小板和血红蛋白计数。两组间比较采用t检验,不同组间两两比较采用One-way ANOVA检验。结果正常组和对照组间脾功能(机体免疫功能、脾清除功能和抗感染能力)差异无统计学意义(均P>0.05)。脾切除组比脾血管结扎组的手术时间[(37.5±6.0)min比(22.5±6.0)min,P<0.001]、手术失血量[(1.7±0.5)ml比(0.9±0.5)ml,P=0.011]、胃肠道功能恢复时间[(6.6±0.9)d比(5.1±1.0)d,P=0.007]显著增加。与正常组和对照组相比,脾血管结扎组和脾切除组中IgG、IgA和IgM水平、CD3+T淋巴细胞、CD4+T淋巴细胞和CD8+T淋巴细胞比例显著降低(均P<0.001);外周血IL-1β、IL-2、IL-6、TNF-α和TGF-β1水平、内毒素含量、痘痕红细胞出现率和红细胞、白细胞、血小板和血红蛋白水平均显著增加(均P<0.001)。脾血管结扎组的IgG、IgA、IgM、IL-2、TGF-β1、CD3+T、CD4+T、CD8+T水平和CD4+T/CD8+T细胞计数比值显著高于脾切除组(均P<0.001);而其IL-6、TNF-α、内毒素水平、痘痕红细胞出现率、白细胞、血小板和血红蛋白水平显著低于脾切除组(均P<0.001)。结论脾血管结扎术和脾切除术显著降低了脾的免疫功能、脾清除能力和抗感染能力;但脾血管结扎术在降低脾功能方面明显弱于脾切除术。因此,脾血管结扎术具有保留部分脾功能的作用。

关键词：脾切除术脾脾功能亢进