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基于Mg牺牲电极与Ca/Mg共沉淀的赤泥复合材料制备及其磷吸附性能研究

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环境科学学报 2024年第1期44卷 252-264页

作者：陶乐瑶欧阳铸祝采莹曹露黄海明丁丽胡莹王炳乾李林隆东莞理工学院生态环境与建筑工程学院东莞523808 深圳市清蓝工程咨询有限公司深圳518000 贵州省黔西南州贞丰县第三中学贵州562200

以赤泥为载体,通过Mg牺牲电极和Ca/Mg共沉淀法将Ca/Mg负载到赤泥表面,以制备具有良好磷吸附性能的赤泥复合材料.结果表明,Mg牺牲电极改性的赤泥复合材料(RM-EMg600)的吸附性能优于Ca/Mg共沉淀改性的赤泥复合材料(RM-CM500).Langmuir模... 详细信息

以赤泥为载体,通过Mg牺牲电极和Ca/Mg共沉淀法将Ca/Mg负载到赤泥表面,以制备具有良好磷吸附性能的赤泥复合材料.结果表明,Mg牺牲电极改性的赤泥复合材料(RM-EMg600)的吸附性能优于Ca/Mg共沉淀改性的赤泥复合材料(RM-CM500).Langmuir模型拟合得到,RM-EMg600和RM-CM500对磷酸盐的最大吸附量分别为171.66 mg·g^(-1)和91.60 mg·g^(-1).赤泥复合材料对高浓度磷的吸附过程符合Freundlich模型和拟二阶动力学模型,吸附行为更符合多分子层吸附.在酸性的条件下,其对水溶液中的磷酸盐具有更好的去除效果.FT-IR、XRD、SEM和钙/镁离子的总浸出实验分析表明,赤泥复合材料对磷的吸附机制主要是化学沉淀、物理吸附、离子交换和静电作用.因此,赤泥复合材料不仅使得赤泥实现了资源化,同时也能促进磷资源的可持续发展.

关键词：赤泥(RM) Mg牺牲电极 Ca/Mg共沉淀吸附磷酸盐

Numerical Simulation of Clocking Effect on Blade Unsteady Aerodynamic Force in Axial Turbine

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Journal of Thermal Science 2012年第5期21卷 474-482页

作者： LI Wei zhu Xiao-cheng ouyang Hua DU Zhao-hui Shanghai JiaoTong University Shanghai 200240 China

To give an insight into the clocking effect and its influence on the wake transportation and its interaction, the unsteady three-dimensional flow through a 1.5-stage axial low pressure turbine is simulated numerically by using a density-correction based, Reynolds-Averaged Navier-Stokes equations commercial CFD code. The 2nd stator clocking is applied over ten equal tangential positions. The results show that the harmonic blade number ratio is an important factor affecting the clocking effect. The clocking effect has very small influence on the turbine efficiency in this investigation. The difference between the maximum and minimum efficiency is about 0.1%. The maximum efficiency can be achieved when the 1st stator wake enters the 2nd stator passage near blade suction surface and its adjacent wake passes through the 2nd stator passage close to blade pressure surface. The minimum efficiency appears if the 1st stator wake impinges upon the leading edge of the 2nd stator and its adjacent wake of the 1st stator passes through the mid-channel in the 2nd stator. The wake convective transportation and the blade circulation variation due to its impingement on the subsequent blade are the main mechanism affecting the pressure variation in blade surface.

关键词： Axial Turbine Clocking Effect Numerical Simulation

Preparation and properties of poly(lactic acid)/cellulolytic enzyme lignin/PGMA ternary blends

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Chinese Chemical Letters 2012年第3期23卷 351-354页

作者： Wen zhu ouyang Yong Huang Hong Jun Luo Dong Shan Wang Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of ChemistryChinese Academy of SciencesGuangzhou 510650China National Engineering Research Center for Engineering Plastics Technical Institute of Physics&ChemistryChinese Academy of SciencesBeijing 100190China

Poly（lactic acid）-based ternary blends consisting of poly（lactic acid）（PLA）,cellulolytic enzyme lignin（CEL）,and polyolefine grafting maleic anhydride（PGMA） were prepared by extrusion blending and the mechanical properties and the morphology of the ternary blends were *** was found that the mechanical properties varied with various loading of the components in the *** to neat PLA,the tensile strength and the Young＇s modulus of the ternary blends were decreased,but the elongation at break and the impact strength were effectively *** electron microscope observations revealed that the CEL plays a bridging role between PLA and PGMA,enhancing the miscibility between them and resulting in the improvement of ductility and toughness of the ternary *** the cost and performance,we obtained the optimal blend PLA/CEL/ PGMA（80/20/20,w/w/w）,of which the impact strength and the elongation at break were doubled as that of neat PLA,and the tensile strength remained moderate.

关键词： Polycaprolactone Cellulolytic enzyme lignin Tougher Blends

Fertilization regulates the response of wheat yield to interannual temperature variation in North China

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Journal of Plant Ecology 2015年第5期8卷 523-529页

作者： Zhenzhong Sun Anping Chen Junhua Ma Chune He zhu ouyang Zhenrong Tian Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesNo.11 of Datun RoadChaoyang DistrictBeijing 100101China Department of Ecology and Evolutionary Biology Princeton UniversityPrincetonNJ 08544USA

Aims understanding the effect of long-term fertilization on the sensitivity of grain yield to temperature changes is critical for accurately assess-ing the impact of global warming on crop *** this study,we aim to assess the impacts of temperature changes on grain yields of winter wheat(Triticum aestivum l.)under different fertilization treatments in a long-term manipulative experiment in North *** We measured grain yields of winter wheat under four fertilization treatments at the Yucheng Comprehensive Experimental station each year from 1993 to *** also measured air temperature at 0200,0800,1400 and 2000 h each day since 1 January *** then used the first-difference method and simple linear regres-sion models to examine the relationship of crop yield changes to mean air temperature,mean daytime and nighttime air temperature in crop growing *** Findings We found that increases in mean daily temperature,mean day-time temperature and mean nighttime temperature each had a positive impact on the grain yield of winter *** yield increased by 16.7-85.6%for winter wheat in response to a 1°C increase in growing season mean daily *** wheat yield was more sensitive to variations of nighttime temperature than to that of daytime *** observed temperature impacts also varied across different fertilization *** fertilization significantly enhanced grain yields for winter wheat under a warming *** plots treated with nitrogen and phosphorous balanced fertilization(NPK-and NP-treated plots)were more responsive to temperature changes than those *** report provides direct evidence of how temperature change impacts grain yields under different fertiliza-tion treatments,which is useful for crop management in a chang-ing global climate.

关键词： grain yield fertilization daytime temperature nighttime temperature winter wheat

Much Improved Irrigation Use Efficiency in an Intensive Wheat-Maize Double Cropping System in the North China Plain

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Journal of Integrative Plant Biology 2007年第10期49卷 1517-1526页

作者： Quanxiao Fang Yuhai Chen Qiang Yu zhu ouyang Quanqi Li Shunzhang Yu Agronomy College Qingdao Agricultural University Qingdao China266109 Institute of Geographical Sciences and Natural Resources Research The Chinese Academy of Sciences Beijing China100101 Agronomy College Shandong Agricultural University Taian China271018

Crop yield and water use efficiency （WUE） in a wheat-maize double cropping system are influenced by short and uneven rainfalls in the North China Plain （NCP）, A 2-year experiment was conducted to investigate the effects of irrigation on soil water balance, crop yield and WUE to improve irrigation use efficiency in the cropping system, Soil water depletion （~SWS） by crop generally decreased with the increase of irrigation and rainfall, while ASWS for the whole rotation was relatively stable among these irrigation treatments, High irrigations in wheat season increased initial soil moisture and ASWS for subsequent maize especially in the drought season, Initial soil water influenced mainly by the irrigation and rainfall in the previous crop season, is essential to high yield in such cropping systems, Grain yield decreased prior to evapotranspiraUon （ET） when ET reached about 300mm for wheat, while maize showed various WUEs with similar seasonal ET, For whole rotation, WUE declined when ET exceeded about 650 mm, These results indicate great potential for improving irrigation use efficiency in such wheat-maize cropping system in the NCP, Based on the present results, reasonable irrigation schedules according to different annual rainfall conditions are presented for such a cropping system.

关键词： cropping system crop yield irrigation schedule North China Plain soil water balance water use efficiency.

Effects of Interaction between Axial and Radial Secondary Air and Reductive Intensity in Reduction Region on Combustion Characteristics and NO_(x) Emission of Coal Preheated by a Self-Preheating Burner

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Journal of Thermal Science 2024年第1期33卷 249-267页

作者： SU Kun DING Hongliang ouyang Ziqu ZHANG Jinyang zhu Shujun Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

The study focused on the effects of the interaction between axial and radial secondary air and the reductive intensity in reduction region on combustion characteristics and NO_(x) emission in a 30 kW preheating combustion *** results revealed that the interaction and reductive intensity influenced the combustion in the down-fired combustor(DFC) and NO_(x) emission *** the temperature distribution,the interaction caused the position of the main combustion region to shift down as R_(2-12)(ratio of axial secondary air flow to radial secondary air flow) decreased or λ_(2)(total secondary air ratio) increased,and there was the interplay between both of their *** R_(3-12)(ratio of first-staged tertiary air flow to second-staged tertiary air flow)increased,the decrease in the reductive intensity also caused the above phenomenon,and the peak temperature increased in this *** the NO_(x) emission,the interaction affected the NO_(x) reduction adversely when λ_(2) or R_(2-12) was higher,and the range of this effect was larger,so that the NO_x emission increased obviously as they *** decrease in the reductive intensity caused the NO_(x) emission increased under the homogeneous reduction mechanism,while was unchanged at a high level under the heterogeneous reduction *** the combustion efficiency,the interaction improved the combustion efficiency as λ_(2) increased when R_(2-12) was lower,while reduced it as λ_(2) increased excessively when R_(2-12) was *** proper decrease in the reductive intensity caused the combustion efficiency increased obviously,while was hardly improved further when the intensity decreased *** this study,the lowest NO_(x) emission was only 41.75 mg/m^(3) without sacrificing the combustion efficiency by optimizing the interaction and reductive intensity.

关键词： self-preheating interaction of axial and radial secondary air reductive intensity combustion characteristic NO_(x)emission

Chain Extender-induced Hydrogen Bonding Organization Determines the Morphology and Properties of Thermoplastic Polycarbonate Polyurethane

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Chinese Journal of Polymer Science 2024年第1期42卷 87-96,I0009页

作者： Yi-Lang Qin Ping zhu Chen-Xi ouyang Xia Dong Fuwai Hospital Chinese Academyof Medical Sciences&Peking Union Medical College/National Center for Cardiovascular DiseasesBejing 100037China CASKey Laboratoryof Engineering Plastics CAS Research/Education Centerfor Excellence in Molecular SciencesInstitute ofChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Thermoplastic polycarbonate polyurethanes(PCUs) are multiblock copolymers that have been applied for medical devices for long time. Aliphatic diols are common chain extenders(CE) involved in the composition of the hard segments of PCU. However, limited knowledge was discovered about how the chemical structure of CE affects the hydrogen bonding organization within PCUs and their mechanical *** investigate this problem, a group of PCUs were synthesized respectively by extending the polymer chain with 1,4-butanediol(BDO),aminoethanol(MEA), ethanediol(EO) as three kinds of chain extenders. Tiny differences in the CE chemical structure results in remarkable variations in phase separation, condensed morphologies, thermal and mechanical properties, which are characterized by Fourier transform infrared spectrometer, atomic force microscopy, small-angle X-ray scattering, differential scanning calorimetry, and tensile tests. The microstructural evolution during unilateral deformation and the different mechanism induced by the different CEs was probed and unveil by in situ wide-and small-angle X-ray diffraction. Symmetry of CE can improve the organization of the hydrogen bonding. The coherence strength of the urethane/urea group also plays a key role by comparing the two PCUs with ethanediol and aminoethanol.

关键词： Thermoplastic polycarbonate polyurethane Chain extender Hydrogen bonding Mechanical properties

3D robust anisotropic diffusion filtering algorithm for sparse view neutron computed tomography 3D image reconstruction

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Nuclear Science and Techniques 2024年第3期35卷 13-29页

作者： Yang Liu Teng-Fei zhu Zhi Luo Xiao-Ping ouyang School of Nuclear Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an 710024China

The most critical part of a neutron computed tomography(NCT) system is the image processing algorithm,which directly affects the quality and speed of the reconstructed *** types of noise in the system can degrade the quality of the reconstructed ***,to improve the quality of the reconstructed images of NCT systems,efficient image processing algorithms must be *** anisotropic diffusion filtering(ADF) algorithm can not only effectively suppress the noise in the projection data,but also preserve the image edge structure information by reducing the diffusion at the image ***,we propose the application of the ADF algorithm for NCT image *** compare the performance of different algorithms in NCT systems,we reconstructed images using the ordered subset simultaneous algebraic reconstruction technique(OS-SART) algorithm with different regular terms as image processing *** the iterative reconstruction,we selected two image processing algorithms,the Total Variation and split Bregman solved total variation algorithms,for comparison with the performance of the ADF ***,the filtered back-projection algorithm was used for comparison with an iterative *** reconstructing the projection data of the numerical and clock models,we compared and analyzed the effects of each algorithm applied in the NCT *** on the reconstruction results,OS-SART-ADF outperformed the other algorithms in terms of denoising,preserving the edge structure,and suppressing *** example,when the 3D Shepp–Logan was reconstructed at 25 views,the root mean square error of OS-SART-ADF was the smallest among the four iterative algorithms,at only *** universal quality index,mean structural similarity,and correlation coefficient of the reconstructed image were the largest among all algorithms,with values of 0.9877,0.9878,and 0.9887,respectively.

关键词： NCT OS-SART Sparse-view Anisotropic diffusion filtering

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鸟粪石结晶法回收电镀废水中氮磷试验研究

工业水处理 2024年第4期44卷 113-119,178页

作者：孙采蕊欧阳铸曹露胡莹黄海明王炳乾龙柯桦陶乐瑶东莞理工学院生态环境与建筑工程学院广东东莞523808 深圳市清蓝工程咨询有限公司广东深圳518000 贵州省黔西南州贞丰县第三中学贵州黔西南州562200

采用鸟粪石结晶法回收电镀废水中的氮磷,主要考察了pH、重金属离子浓度、氟离子质量浓度对电镀废水中氮磷去除的影响,结果表明pH和重金属离子浓度可显著影响鸟粪石结晶过程,低质量浓度氟离子(0~40 mg/L)对鸟粪石结构的影响可以忽略。对... 详细信息

采用鸟粪石结晶法回收电镀废水中的氮磷,主要考察了pH、重金属离子浓度、氟离子质量浓度对电镀废水中氮磷去除的影响,结果表明pH和重金属离子浓度可显著影响鸟粪石结晶过程,低质量浓度氟离子(0~40 mg/L)对鸟粪石结构的影响可以忽略。对不同条件下形成的鸟粪石进行了XRD、SEM、XPS表征,分析了重金属离子和氟离子对鸟粪石结晶过程的影响机理。重金属离子与鸟粪石可发生共沉淀,干扰鸟粪石结晶的形成。当氟离子与重金属离子共存时,氟离子会影响重金属离子在晶体上的吸附,并生成非晶相共沉淀物,改变鸟粪石的晶体形态。该研究为鸟粪石结晶法回收电镀废水中的氮磷提供理论依据。

关键词：电镀废水重金属离子氟离子鸟粪石

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