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Science China Chemistry 2013年第11期56卷 1658-1666页

作者： GAO Xing sheng guodong HUANG YuYing Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied PhysicsChinese Academy of Sciences School of Chemistry and Chemical Engineering Shaoxing University

In this paper, the macroscopic interaction method and high resolution EXAFS technique with a bent crystal analyzer were combined to study Eu（III） interaction mechanism and microstructure with y-MnOOH as a function of pH. The results indicated that Eu（III） interaction with y-MnOOH was apparently dependent on pH but independent of ionic strength, suggesting the for- mation of inner-sphere surface complexation for Eu（III） onto y-MnOOH. Results of EXAFS analysis indicated that Eu was surrounded by -9.00 atoms in first coordination shell at REu-O =2.40A, and second shell of Mn atoms at REu-Mn ≈ 3.60 was observed for the three adsorption samples. These findings suggested formation of a bidentate surface complex with Eu（III） bonding by edge sharing to MnO6-octahedron on y-MnOOH surface. Both the macroscopic interaction data and the molecular level evidence of Eu（III） microstructure at the 3,-MnOOH-water interface should be factored into better understanding the fate and mobility of Eu（III） and related radionuclides in the natural soil and water environment.

关键词： high resolution EXAFS technique bent crystal analyzer Eu(III) y-MnOOH interaction mechanism microstructure

Mechanistic insights into sequestration of U(VI) toward magnetic biochar: Batch, XPS and EXAFS techniques

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Journal of Environmental Sciences 2018年第8期30卷 217-225页

作者： Qingyuan Hu Yuling Zhu Baowei Hu Songhua Lu guodong sheng College of Life Science College of Chemistry and Chemical Engineering Shaoxing University Institute of Plasma Physics Chinese Academy of Science

The magnetic iron oxide（Fe3O4） nanoparticles stabilized on the biochar were synthesized by fast pyrolysis of Fe（II）-loaded hydrophyte biomass under N2 conditions. The batch experiments showed that magnetic biochar presented a large removal capacity（54.35 mg/g）at pH 3.0 and 293 K. The reductive co-precipitation of U（VI） to U（IV） by magnetic biochar was demonstrated according to X-ray diffraction, X-ray photoelectron spectroscopy and X-ray absorption near edge structure analysis. According to extended X-ray absorption fine structure analysis, the occurrence of U-Fe and U-U shells indicated that high effective removal of uranium was primarily inner-sphere coordination and then reductive co-precipitation at low pH. These observations provided the further understanding of uranium removal by magnetic materials in environmental remediation.

关键词： Magnetic biochar Uranium X-ray absorption spectroscopy Sequestration

Adsorption and mechanistic study of the invasive plant-derived biochar functionalized with CaAl-LDH for Eu(Ⅲ) in water

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Journal of Environmental Sciences 2020年第10期32卷 127-137页

作者： shengbo Li Lijia Dong Zuofu Wei guodong sheng Kui Du Baowei Hu School of Life Science School of Chernistry and Chemical EngineeringShaoxing UniversityShaoxing 312000China School of Life Science Shanxi Normal UniuersityLinfen 041004China

Herein,we developed the invasive plant-derived biochar (IPB) functionalized with CaAl-LDH at five mass ratios using a physical mixture method,assessed their adsorption perform for Eu(Ⅲ),and explored the relative *** show that the IPB successfully loaded CaAl-LDH in five composites and their Eu(Ⅲ) sorption affinities were strongly affected by solution p H,contact time,temperature,and the mass ratio of LDH and *** the sorpiton process for Eu(Ⅲ) occurred on the heterogeneous surface of five composites and the boundary layer diffusion limited the chemical sorption ***,the CaAl-LDH/IPB composite with high ratio of IPB had higher sorption capacity than the one with high ratio of LDH due to larger porosity of the *** mechanisms containing ion exchange between Al and Eu ions,surface complexation with carboxyl-and oxygen-containing functional groups,and precipitation were involved in the Eu(Ⅲ) sorption,but the dominant sorption mechanism for each CaAl-LDH/IPB composite differed with different mass ratio of CaAl-LDH and *** composite with more IPB (e.g.,CaAl-LDH/IPB-13),both ion exchange and surface complexes dominated the sorption process and the intensity of Eu^3+ was identified with the one of *** in composites with high LDH,ion exchange dominated the sorption and the intensity of Eu^3+ was obviously higher than the one of Eu_2O_*** research will provide a new perspective for the application of the LDH/biochar materials.

关键词： Invasive plants Biochar LDH Europium sorption

Interaction of radionuclides with natural and manmade materials using XAFS technique

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Science China Chemistry 2017年第2期60卷 170-187页

作者： Shujun Yu Xiangxue Wang Shitong Yang guodong sheng Ahmed Alsaedi Tasawar Hayat Xiangke Wang School of Environment and Chemical Engineering North China Electric Power UniversityBeijing 102206China Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Suzhou 215123China College of Chemistry and Chemical Engineering Shaoxing UniversityShaoxing 312000China Nonlinear Analysis and Applied Mathematics(NAAM)Research Group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

The X-ray absorption fine structure(XAFS)technology has exhibited a very unique application in the study of sorption mechanism,chemical species and microstructures of radionuclides at the natural solid-water *** this review,the interaction mechanism of radionuclides with clay minerals and nanomaterials under different environmental conditions are summarized from the XAFS spectroscopy *** coordination number and the bond distances of radionuclides,the oxidation-reduction reactions,the influence of humic substances and microorganisms on the species and structures of radionuclides at molecule level are reviewed and *** review is helpful to understand the interactions of radionuclides with oxides,natural clay minerals and nanomaterials,which is also crucial to evaluate the physicochemical behaviors of radionuclides in the natural environment.

关键词： radionuclides XAFS species microstructures interaction mechanism

Adsorption of Eu(Ⅲ) on titanate nanotubes studied by a combination of batch and EXAFS technique

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Science China Chemistry 2012年第1期55卷 182-194页

作者： sheng guodong YANG ShiTong ZHAO DongLin sheng Jiang WANG XiangKe Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031China

The effects of pH,contact time and natural organic ligands on radionuclide Eu(Ⅲ) adsorption and mechanism on titanate nanotubes(TNTs) are studied by a combination of batch and extended X-ray absorption fine structure(EXAFS) *** measurements show that the adsorption is ionic strength dependent at pH *** presence of humic acid(HA) /fulvic acid(FA) increases Eu(Ⅲ) adsorption on TNTs at low pH,but reduces Eu(Ⅲ) adsorption at high *** results of EXAFS analysis indicate that Eu(Ⅲ) adsorption on TNTs is dominated by outer-sphere surface complexation at pH *** pH < 6.0,Eu(Ⅲ) consists of ～ 9 O atoms at REu?O ≈ 2.40  in the first coordination sphere,and a decrease in NEu-O with increasing pH indicates the introduction of more asymmetry in the first sphere of adsorbed Eu(Ⅲ).At long contact time or high pH values,the Eu(Ⅲ) consists of ～2 Eu at REu-Eu ≈ 3.60  and ～ 1 Ti at REu-Ti ≈ 4.40 ,indicating the formation of inner-sphere surface complexation,surface precipitation or surface *** adsorbed HA/FA on TNTs modifies the species of adsorbed Eu(Ⅲ) as well as the local atomic structures of adsorbed Eu(Ⅲ) on HA/FA-TNT *** Eu(Ⅲ) on HA/FA-TNT hybrids forms both ligand-bridging ternary surface complexes(Eu-HA/FA-TNTs) as well as surface complexes in which Eu(Ⅲ) remains directly bound to TNT surface hydroxyl groups(i.e.,binary Eu-TNTs or Eu-bridging ternary surface complexes(HA/FA-Eu-TNTs)).The findings in this work are important to describe Eu(Ⅲ) interaction with nanomaterials at molecular level and will help to improve the understanding of Eu(Ⅲ) physicochemical behavior in the natural environment.

关键词： titanate nanotubes radionuclide Eu(Ⅲ) extended X-ray absorption fine structure(EXAFS) spectroscopy humic acid fulvic acid

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车削工件宽度尺寸在机精密检测方法的研究

制造技术与机床 2018年第4期 134-138页

作者：盛国栋浙江工业职业技术学院浙江绍兴312000

针对数控车削加工中部分宽度尺寸无法直接测量的问题,提出设计了一整套在机测量装置和测量方法。测量装置是由磁性表座、连接杆、杠杆千分表等装置组合而成。并分别针对工件中单方向尺寸、槽宽尺寸、槽间厚度尺寸三种不同类的宽度尺寸... 详细信息

针对数控车削加工中部分宽度尺寸无法直接测量的问题,提出设计了一整套在机测量装置和测量方法。测量装置是由磁性表座、连接杆、杠杆千分表等装置组合而成。并分别针对工件中单方向尺寸、槽宽尺寸、槽间厚度尺寸三种不同类的宽度尺寸提出三种打表测量的计算方法。同时对杠杆千分表的反向间隙进行测定。通过打表测量,可以有效的进行车削加工中宽度尺寸的在机检测。并把测量精度提升至0.001 mm的精密测量级别。可以有效提高机床的加工能力。

关键词：在机测量装置打表测量精密测量反向间隙

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回油盖隧道式二次抽芯机构注塑模设计

工程塑料应用 2024年第6期52卷 55-62页

作者：毛江峰盛国栋浙江工业职业技术学院浙江绍兴312000

为解决塑件局部区域复杂特征的脱模困难问题,在注塑模具设计时首先采用局部特征分区域办法将局部难脱模特征集中分离出来,而后依据脱模方向的分布情况再进行同向集成分类,针对各集成后的脱模方向设计单次或多次抽芯机构,即脱模方向集成... 详细信息

为解决塑件局部区域复杂特征的脱模困难问题,在注塑模具设计时首先采用局部特征分区域办法将局部难脱模特征集中分离出来,而后依据脱模方向的分布情况再进行同向集成分类,针对各集成后的脱模方向设计单次或多次抽芯机构,即脱模方向集成分类脱模设计法,从而有效地解决塑件脱模方向众多而导致的塑件整件或局部区域脱模设计困难问题。基于上述设计原理,结合润滑盒回油盖塑件的脱模设计困难问题,创新设计了一种隧道式二次抽芯机构。在该机构中,利用一根斜导柱驱动主成型块内的隧道滑块转向驱动主成型块内的另一成型活动块先完成第一次抽芯,此过程中主滑块与主成型块分离,而主成型块维持不动;然后该斜导柱再继续驱动主滑块带动主成型块完成第二次抽芯来实现塑件局部区域的脱模。结合机构运动力学分析,在该机构的结构设计中,主滑块与主成型块的闭合锁紧由楔紧块两侧不同斜角的斜面进行锁紧,其斜角分别为23°和25°,相应地,主滑块的斜导柱斜角取20°,用此参数设计的两次抽芯机构顺利地克服了塑件局部区域脱模机构设计困难难题,应用于塑件模具上,较好地实现了塑件的自动化注塑生产。塑件的模具结构为一种单点点浇口三板模具,一模一腔布局。

关键词：润滑盒回油盖机构创新设计二次抽芯隧道滑块模具结构

Investigation of radionuclide～(63)Ni(Ⅱ) sequestration mechanisms on mordenite by batch and EXAFS spectroscopy study

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Science China Chemistry 2012年第6期55卷 632-642页

作者： YANG ShiTong,sheng guodong,GUO ZhiQiang,TAN XiaoLi,XU JinZhang & WANG XiangKe Key Laboratory of Novel Thin Film Solar Cells,Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China 1. Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

The sorption behavior and microscopic sequestration mechanisms of radionuclide 63Ni（II） on mordenite as a function of aging time, ionic srength, initial 63Ni（II） concentrations, solid content and coexistent electrolyte ions were investigated by the combination of batch and EXAFS techniques. Macroscopic experiment results show that the sorption of 63Ni（II） is dependent on ionic strength at pH〈7, and independent of ionic strength at pH〉7. The sorption percentage of 63Ni（II） on mordenite increases with increasing solid content, while the sorption capacity decreases as solid content increases. The presence of different electrolyte ions can enhance or inhibit the sorption of Ni（II） on mordenite in various degrees. EXAFS analysis results of the sam- ples under three different ionic strengths suggest that the retained 63Ni（II） in these samples exists in an octahedral environment with six water ligands. In the initial period of rapid uptake, the sorption of 63Ni（II） is dominated by the formation of innersphere surface complexes. As aging time increases, 63Ni（II） sequestration behavior tends to be mainly controlled by the formation of Ni phyllosilicate coprecipitates and/or Ni（OH）2（s） precipitates. Results for the second shell fit of the sample prepared at an initial 63Ni（II） concentration of 100 mg/L indicate the possible formation of Ni polynuclear surface complexes. Both the macroscopic sorption data and the molecular level evidence of 63Ni（II） surface speciation at the mordenite/water interfaces should be factored into better predictions of the mobility and bioavailability of 63Ni（II） in environment mediums.

关键词： mordenite – 63Ni(II) – aging time – initial concentration – EXAFS analysis

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基于力反馈的虚拟脊柱手术模拟系统的构建

电子技术应用 2013年第12期39卷 129-131页

作者：盛国栋曹其新上海交通大学机械与动力工程学院上海200240

针对医学手术排练演习和手术教学开发了虚拟脊柱手术模拟平台。在该平台上能够根据手术的真实环境,模拟常用手术器械和脊柱结构,实现人机实时交互。详细介绍了系统的硬件环境参数,并基于3DS MAX的建模和力触觉渲染引擎CHAI 3D进行仿真... 详细信息

针对医学手术排练演习和手术教学开发了虚拟脊柱手术模拟平台。在该平台上能够根据手术的真实环境,模拟常用手术器械和脊柱结构,实现人机实时交互。详细介绍了系统的硬件环境参数,并基于3DS MAX的建模和力触觉渲染引擎CHAI 3D进行仿真。仿真实验结果表明,基于力反馈的虚拟脊柱手术模拟系统可以有效地模拟脊柱手术时的力反馈状态,帮助医师进行脊柱手术术前训练,并适用于高校的医学教学和医疗机构人员的培训。

关键词：虚拟手术模型构建碰撞检测力反馈

基于C8051F060的智能电导率仪的优化设计

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电子器件 2012年第4期35卷 444-446页

作者：盛国栋熊肖磊上海交通大学机械与动力工程学院上海200240

为了进一步提高电导率仪的测量精度,设计了一种用软件编程代替硬件电路的方法,解决了传统电导率仪的复杂硬件电路对测量结果所带来的不利影响。实验结果表明,设计思路可行,性能优良,有效地提高了电导率的测量精度,此外,不仅减少了硬件... 详细信息

为了进一步提高电导率仪的测量精度,设计了一种用软件编程代替硬件电路的方法,解决了传统电导率仪的复杂硬件电路对测量结果所带来的不利影响。实验结果表明,设计思路可行,性能优良,有效地提高了电导率的测量精度,此外,不仅减少了硬件的成本,而且降低了系统实现的复杂度,有效地提高了电导率的测量精度。

关键词：电子电路设计软件编程单片机电导率精度