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Effect of compound treatment of rotating magnetic field and Al-5Ti-1B refiner on microstructure and properties of Al-5Cu alloy 被引量:1
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作者 Ao Wang Kai-jiao Kang Da-yong Li 《China Foundry》 SCIE CAS CSCD 2023年第3期225-233,共9页
The Al-5Cu alloys were prepared by different treatment methods,including adding a refiner Al-5Ti-1B,exerting a rotating magnetic field(RMF),and compound treatment of both refiner and RMF.The effects of treatment metho... The Al-5Cu alloys were prepared by different treatment methods,including adding a refiner Al-5Ti-1B,exerting a rotating magnetic field(RMF),and compound treatment of both refiner and RMF.The effects of treatment methods on the microstructure,properties,and solid solubility of the Al-5Cu alloy were investigated.The optimal magnetic field parameters and addition amount of refiner were confirmed by experiment.Results show that either RMF or adding refiner Al-5Ti-1B alone can refine the grain size,and the refining effect can be further improved by a compound refining treatment with optimized magnetic field parameters(120 A current and 8 Hz frequency) and 1.0wt.% Al-5Ti-1B refiner(RMF*+Al-5Ti-1B*).The average grain size is decreased to 68.1 μm,which is 60.8%,21.1%,and 83.5% lower than that of the alloy treated by the optimized rotating magnetic field,the Al-5Ti-1B refiner,and the alloy without any treatment,respectively.The tensile strength and elongation of the alloy reach 232.5 MPa and 18.6%,respectively,which are obviously higher than those of the alloys treated by rotating magnetic field,Al-5Ti-1B refiner,and the alloy without any treatment,respectively.Additionally,the solid solubility of the alloy is also obviously improved compared to the alloys treated by other methods. 展开更多
关键词 rotating magnetic field REFINER compound treatment solid solubility
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Effect of Electromagnetic Compound Treatment on Microstructure and Performance of Cemented Carbide
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作者 WEI Liao YANG Yi +3 位作者 YANG Gang WU Mingxia WEI Can WUXiuli 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第5期1119-1126,共8页
In order to study the effect of electromagnetic compound treatment on the mechanical property, cutting performance and microstructure of cemented carbide, the samples were treated by a self-made electromagnetic compou... In order to study the effect of electromagnetic compound treatment on the mechanical property, cutting performance and microstructure of cemented carbide, the samples were treated by a self-made electromagnetic compound treatment device with different magnetic field strength(H=1, 1.25 and 1.5 T). The electromagnetic compound treatment method was proposed to couple pulsed magnetic field and pulsed current. The results show that after the pulsed magnetic field treatment, the values of the transverse rupture strength of the samples were respectively reduced by 21%, 20.6% and 20.1%;the cutting performance was decreased by about 4.5%, which means the tool life was decreased. After the electromagnetic compound treatment, the values of the transverse rupture strength of the rectangular samples were respectively increased by 8%, 8.6% and 9.5%, and the tool life was increased by 4.2%, 7% and 10.3%. After the electromagnetic compound treatment, the pulse current provided the driving force for dislocation motion. A strong pulse current driving force is more likely to make the dislocation multiply and slip. A high density dislocation cell is formed within the material, so the mechanical properties were significantly increased. 展开更多
关键词 CEMENTED CARBIDE magnetic field treatment ELECTROMAGNETIC compound treatment microstructure/performance
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Volatile Organic Compounds (VOCs) in China: Progress and Prospects of Research on Treatment Technologies and Policy Provisions
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作者 Lixia Wu Yu Zhu +2 位作者 Jing Yuan Xiaozhong Guo Qianfeng Zhang 《Journal of Materials Science and Chemical Engineering》 2024年第9期1-43,共43页
Volatile organic compounds (VOCs) are an atmospheric pollutant with a boiling point of 50˚C - 260˚C at room temperature and pressure. They are precursors of sulfur dioxide and ozone, which can seriously pollute the at... Volatile organic compounds (VOCs) are an atmospheric pollutant with a boiling point of 50˚C - 260˚C at room temperature and pressure. They are precursors of sulfur dioxide and ozone, which can seriously pollute the atmosphere and endanger human health. After the “14th Five-Year Plan”, VOCs, instead of SO2, became one of the five indicators of China’s atmospheric governance. As a result, the government’s efforts to control VOCs have increased significantly. VOCs governance mustn’t be delayed. This paper provides a comprehensive summary and analysis of VOCs governance, covering the classification of VOCs, analysis of VOC governance technology (with a focus on end-of-pipe governance technology), national policy regulations, current governance shortcomings, and a forward-looking perspective on the future direction of VOCs governance, emphasizing healthy and sustainable development. 展开更多
关键词 Volatile Organic compounds VOCS End-of-Pipe treatment Technology Policy Regulations
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Effects of heat treatment on the intermetallic compounds and mechanical properties of the stainless steel 321–aluminum 1230 explosive-welding interface 被引量:6
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作者 Mohammadreza Khanzadeh Gharah Shiran Gholamreza Khalaj +3 位作者 Hesam Pouraliakbar Mohamma dreza Jandaghi Hamid Bakhtiari Masoud Shirazi 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第11期1267-1277,共11页
The effects of heat treatment on the microstructure and mechanical properties of intermetallic compounds in the interface of stainless steel 321 explosively bonded to aluminum 1230 were investigated in this study. Exp... The effects of heat treatment on the microstructure and mechanical properties of intermetallic compounds in the interface of stainless steel 321 explosively bonded to aluminum 1230 were investigated in this study. Experimental investigations were performed by optical microscopy, scanning electron microscopy, and microhardness and shear tensile strength testing. Prior to heat treatment, increasing the stand-off distance between samples from 1 to 2.5 mm caused their interface to become wavy and the thickness of intermetallic layers to increase from 3.5 to 102.3 μm. The microhardness increased from HV 766 in the sample prepared at a stand-off distance of 1 mm to HV 927 in the sample prepared at a stand-off distance of 2.5 mm; in addition, the sample strength increased from 103.2 to 214.5 MPa. Heat treatment at 450°C for 6 h increased the thickness of intermetallic compound layers to 4.4 and 118.5 μm in the samples prepared at stand-off distances of 1 and 2.5 mm, respectively. These results indicated that increasing the duration and temperature of heat treatment decreased the microhardness and strength of the interface of explosively welded stainless steel 321-Al 1230 and increased the thickness of the intermetallic region. 展开更多
关键词 INTERMETALLIC compoundS EXPLOSIVE WELDING heat treatment stand-off distance MECHANICAL properties
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Source,Process and End Treatment Technology of Volatile Organic Compounds in Oil Storage 被引量:1
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作者 Yuan Yuan Chen Tingting +1 位作者 Zhao Fengjie Sun Hui 《Meteorological and Environmental Research》 CAS 2019年第2期83-90,共8页
Oil storage is a source of volatile organic compounds( VOCs). Volatile organic compounds can cause different damages to the environment,animals and plants. Therefore, it is important to control the discharge of VOCs i... Oil storage is a source of volatile organic compounds( VOCs). Volatile organic compounds can cause different damages to the environment,animals and plants. Therefore, it is important to control the discharge of VOCs in oil storage. In this paper,the control technology of sources of VOCs pollution in oil storage was analyzed from the source,process and end treatment,and measures for the prevention and control of VOCs pollution in oil storage were proposed. 展开更多
关键词 OIL STORAGE VOLATILE organic compounds Whole process treatment treatment TECHNOLOGY
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Treatment of pharmaceutical wastewater containing recalcitrant compounds in a Fenton-coagulation process 被引量:3
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作者 Bukuru Godefroid 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第3期459-463,共5页
The advanced treatment using integrated Fenton's reaction and coagulation process was investigated in this study. Before the advancement, the pharmaceutical wastewater containing lincomycin hydrochloride was pretreat... The advanced treatment using integrated Fenton's reaction and coagulation process was investigated in this study. Before the advancement, the pharmaceutical wastewater containing lincomycin hydrochloride was pretreated by UASB (upflow anaerobic sludge bed) and a SBR (sequencing batch reactor) process. The residual recalcitrant compounds, measured by gas chromatographymass spectrometry (GC-MS), mainly consisted of alcohols, phenols, and nitrogenous and sulfur compounds. The experimental results indicated that when the Fenton's reaction was conducted at pH=3.0, H2O2CODOcr=0.27, H2O2/Fe^2+=3:1 and 30 min of reaction time, and the coagulation process operated at a sulfate aluminum concentration of 800 mg/L and pH value of 5.0, the color and COD in the wastewater decreased by 94% and 73%, respectively; with a finale COD concentration of 267 mg/L and color level of 40 units, meeting the secondary standard of GB8978-1996 for industrial wastewater. 展开更多
关键词 pharmaceutical wastewater GC-MS recalcitrant compounds Fenton's reaction coagulation process advanced wastewater treatment
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巨噬细胞的胞葬作用:肥胖相关代谢性疾病治疗的新靶向
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作者 杨风英 赵玉晴 +4 位作者 油惠娟 张鹏翼 陈岩 王清路 刘莹莹 《中国组织工程研究》 CAS 北大核心 2025年第2期430-440,共11页
背景:巨噬细胞胞葬作用障碍引起的局部和系统炎症损害与多种肥胖相关代谢性疾病有关,且以胞葬作用为靶向的化合物表现出良好的治疗效果。目的:通过综述肥胖对巨噬细胞胞葬作用各个阶段的影响结果分析肥胖抑制胞葬作用的关键机制,总结以... 背景:巨噬细胞胞葬作用障碍引起的局部和系统炎症损害与多种肥胖相关代谢性疾病有关,且以胞葬作用为靶向的化合物表现出良好的治疗效果。目的:通过综述肥胖对巨噬细胞胞葬作用各个阶段的影响结果分析肥胖抑制胞葬作用的关键机制,总结以胞葬作用为靶向的化合物治疗代谢性疾病的研究现状,以进一步阐明胞葬作用及其与肥胖相关代谢性疾病的关系,为疾病防治策略提供新思路。方法:以“efferocytosis,metabolism,obesity,obese,atherosclerosis,non-alcoholic steatohepatitis,neurodegeneration,tumor,osteoarthritis,diabetes,compound,medicine,treatment”为英文检索词在PubMed和Web of Science数据库检索英文文献,以“胞葬作用”为中文检索词,在中国知网、万方和维普数据库检索中文文献。经严格筛选最终纳入99篇文献进入综述分析。结果与结论:①参与巨噬细胞胞葬作用“寻我”“食我”过程的因子中含有大量凋亡细胞源性因子,因此“寻我”“食我”过程主要受凋亡细胞调控;参与骨架重组和消化过程的胞葬因子主要来源于巨噬细胞,对巨噬细胞胞葬作用活性具有决定性作用。此结果提示,“寻我”“食我”过程的因子表达水平主要反映细胞凋亡情况,在评价巨噬细胞胞葬作用活性时,选择骨架重组和消化阶段的胞葬因子的表达更具科学性。②肥胖抑制巨噬细胞胞葬作用,但肥胖对多数“寻我”“食我”因子及骨架重组因子具有应激性激活作用,对多数消化因子具有抑制作用。此结果进一步说明,消化阶段对胞葬作用活性的决定性意义,并提示部分研究以“寻我”“食我”胞葬因子表达增加作为胞葬作用增强的依据不可靠;且提示未来在探讨以巨噬细胞胞葬作用为靶向的干预策略时,靶向消化阶段胞葬因子可能更有效。③巨噬细胞胞葬作用激活物对多种代谢性疾病治疗有效,但肿瘤组织巨噬细胞胞葬作用抑制物表现出良好的抗癌效果,说明应根据组织炎症特点合理评价胞葬作用的意义。④胞葬作用是2003年提出的一个较新概念,研究历程较短,胞葬因子复杂,目前关于肥胖对胞葬作用影响的研究仅涉及冰山一角并且大部分处于粗浅水平,对其更深入的机制探讨仍需大量科学实验的进一步验证。 展开更多
关键词 肥胖 巨噬细胞 胞葬作用 胞葬因子 炎症 代谢性疾病 化合物 治疗
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Stress Relaxation of Paraffin Wax Emulsion/Copper Azole Compound System Treated Wood
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作者 廖雨晴 钟卉 马尔妮 《Agricultural Science & Technology》 CAS 2016年第5期1243-1248,1267,共7页
[Objective] An approach of stress relaxation was proposed in present work to investigate the interactions among the waterproof agent,preservative and wood.[Method] Paraffin emulsion waterproof using natural surfactant... [Objective] An approach of stress relaxation was proposed in present work to investigate the interactions among the waterproof agent,preservative and wood.[Method] Paraffin emulsion waterproof using natural surfactants was prepared at different concentrations of 0.5% and 2.0%,which were added into two concentrations(0.3%,0.5%) of copper azole(CA) to obtain compound systems,and one-time fullcell process was applied to treat the sapwood of Pinus spp.with a size of 10 mm(L) ×10 mm(R) ×10 mm(T).[Result] Compressive stress relaxation behaviors at two moisture levels and room temperature were measured and the results were as follows:1) compared with control group,the stress relaxation of compound system treated groups reduced,whether at oven-dried state or air-dried state.2) Under oven-dried condition,CA could weaken the relaxation of treated samples and this effect became greater with increasing concentration of preservative,but an increase in the concentration of paraffin emulsion would slightly promote the relaxation of compound system treated samples.While under air-dried condition,both CA and paraffin wax emulsion lowered the relaxation which was inversely related to the concentrations of both agents.[Conclusion] The results were expected to shed new light on the various macroscopic properties of the compound system treated wood at a microscopic level,and to provide favorable scientific evidences and theoretical supports for the manufacture of waterproofing preservative-treated wood. 展开更多
关键词 WOOD WATERPROOF PRESERVATION compound treatment Stress relaxation
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Degradation of Organic Compounds by Active Species Sprayed in a Dielectric Barrier Corona Discharge System 被引量:4
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作者 李杰 宋玲 +3 位作者 刘强 屈广周 李国锋 吴彦 《Plasma Science and Technology》 SCIE EI CAS CSCD 2009年第2期211-215,共5页
Investigation was made into the degradation of organic compounds by a dielectric barrier corona discharge (DBCD) system. The DBCD, consisting of a quartz tube, a concentric high voltage electrode and a net wrapped t... Investigation was made into the degradation of organic compounds by a dielectric barrier corona discharge (DBCD) system. The DBCD, consisting of a quartz tube, a concentric high voltage electrode and a net wrapped to the external wall (used as ground electrode), was introduced to generate active species which were sprayed into the organic solution through an aerator fixed on the bottom of the tube. The effect of four factors-the discharge voltage, gas flow rate, solution conductivity, and pH of wastewater, on the degradation efficiency of phenol was assessed. The obtained results demonstrated that this process was an effective method for phenol degradation. The degradation rate was enhanced with the increase in power supplied. The degradation efficiency in alkaline conditions was higher than those in acid and neutral conditions. The optimal gas flow rate for phenol degradation in the system was 1.6 L/min, while the solution conductivity had little effect on the degradation. 展开更多
关键词 dielectric barrier corona discharge (DBCD) active species organic compound degradation wastewater treatment
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Effect of background electrolytes on the adsorption of nitroaromatic compounds onto bentonite 被引量:4
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作者 CHEN Baoliang, HUANG Wenhai Department of Environmental Science, Zhejiang University, Hangzhou 310028, Zhejiang, China. 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第8期1044-1052,共9页
To further elucidate interaction of nitroaromatic compounds with mineral surface, the sorption of m-dinitrobenzene (m-DNB) and nitrobenzene to original bentonite in aqueous solution containing different electrolytes... To further elucidate interaction of nitroaromatic compounds with mineral surface, the sorption of m-dinitrobenzene (m-DNB) and nitrobenzene to original bentonite in aqueous solution containing different electrolytes (i.e., KCl, NH4Cl, CaCl2 and Tetramethylammonium bromide (TMAB)) was studied. The sorption of m-DNB was greatly enhanced with the presence of KCl and NH4Cl, while little influence was observed with CaCl2 and TMAB, following the order of KCl 〉 NH4Cl 〉〉 TMAB, CaCl2, or DI water. For nitrobenzene, sorption enhancement only occurred at high nitrobenzene concentrations in the presence of KCl, and the solute equilibrium concentration at inflexion point was lowered with increasing KCl concentration. These sorption enhancements were significantly promoted with the increase of electrolyte concentration. The salting-out effect is insufficient to account for the sorption enhancement by original bentonite with increasing KCI or NH4Cl concentration. X-ray diffraction patterns of bentonite suspensions indicated that the sorption enhancement of m-DNB was attributed to the intercalation of K^+ or NH4^+ into bentonite interlayer and then dehydration with m-DNB to form inner-sphere complexes, which caused previously expanded bentonite interlayers to collapse in aqueous suspension, thus further enhanced the interaction of phenyl with siloxane surface. In comparison, the sorption enhancement of NB is attributed to the formation of outer-sphere complexes with K^+ at high solute-loadings (〉 20(0-400 mg/kg). The sorption of m-DNB to initially modified TMA^+-bentonite and K^+-bentonite was almost the same as respective sorption to original bentonite in solution containing TMA^+ and K^+. 展开更多
关键词 SORPTION nitroaromatic compound BENTONITE cation type wastewater treatment
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Experiment and Analysis on the Treatment of Gaseous Benzene Using Pulsed Corona Discharge Plasma 被引量:2
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作者 闫学锋 胡真 《Plasma Science and Technology》 SCIE EI CAS CSCD 2004年第2期2241-2246,共6页
An experiment and analysis on removal of gaseous benzene by pulse corona induced-plasma is presented in this article. Important parameters effecting removal efficiency have been investigated, such as pulse peak voltag... An experiment and analysis on removal of gaseous benzene by pulse corona induced-plasma is presented in this article. Important parameters effecting removal efficiency have been investigated, such as pulse peak voltage, pulse frequency, gas inlet concentration, gas flow rate and reactor temperature. The result shows that the removal efficiency increases with the increase in pulse peak voltage, pulse frequency and reactor temperature, but decreases in the rise of gas inlet concentration and gas flow rate. On the condition of Vp= 36 kV, f= 80 Hz, C=1440 mg/m3 and Q=640 ml/min, the largest removal efficiency is 98%. Finally, the reacted products are qualitatively analysed and the reaction processes are deduced in combination with plasma-chemistry theory. 展开更多
关键词 discharge plasma treatment volatile organic compounds
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Ni-Co/Mg-Al catalyst derived from hydrotalcite-like compound prepared by plasma for dry reforming of methane 被引量:9
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作者 Huali Long Yan Xu +4 位作者 Xiaoqing Zhang Shijing Hu Shuyong Shang Yongxiang Yin Xiaoyan Dai 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第5期733-739,共7页
Ni-Co bimetallic catalysts with different Ni/Co content were derived from cold plasma jet decomposition and reduction of hydrotalcite-like compounds containing Ni,Co,Mg and Al,and their catalytic performance was inves... Ni-Co bimetallic catalysts with different Ni/Co content were derived from cold plasma jet decomposition and reduction of hydrotalcite-like compounds containing Ni,Co,Mg and Al,and their catalytic performance was investigated with dry reforming of methane.Experimental results showed that the hydrotalcite-like precursors could be completely decomposed and partly reduced by cold plasma jet,and the Nicontained catalysts exhibited much higher activity than the catalyst without Ni.Especially,the catalyst with Ni/Co ratio of 8/2 achieved not only the highest conversions of 80.3%and 69.3%for CH4 and CO2,respectively,but also the best stability in 100 h testing.The catalysts were characterized by XRD,XPS,TEM and N2 adsorption techniques,and the results showed that the better performance of the 8Ni2Co bimetallic catalyst was attributed to its higher metal dispersion,smaller metal particle size,as well as the interaction effect between Ni and Co,which were brought by the special catalyst preparation method. 展开更多
关键词 dry reforming of methane Ni-Co bimetallic catalyst cold plasma treatment hydrotalcite-like compound
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Corrosion inhibition of α,β-unsaturated carbonyl compounds on steel in acid medium 被引量:5
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作者 Gao Jiancun Weng Yongji +2 位作者 Salitanate Feng Li Yue Hong 《Petroleum Science》 SCIE CAS CSCD 2009年第2期201-207,共7页
Corrosion inhibition of three α,β-unsaturated carbonyl compounds on N80 steel at high temperature and in concentrated acid medium was evaluated, and the inhibition mechanism was investigated. The results proved that... Corrosion inhibition of three α,β-unsaturated carbonyl compounds on N80 steel at high temperature and in concentrated acid medium was evaluated, and the inhibition mechanism was investigated. The results proved that both cinnamaldehyde and benzalacetone had an evident anticorrosion effect and could reduce the corrosion of steel effectively in acid medium, α,β-unsaturated carbonyl compounds with a benzene ring structure had good adsorption on steel surface. The experiments proved that polymerization of α,β-unsaturated carbonyl compounds on the steel surface at a high temperature and in concentrated acid medium resulted in a good corrosion inhibiting effect, which was attributed to the structures of α,β-unsaturated carbonyl compounds. 展开更多
关键词 α β-unsaturated carbonyl compounds corrosion inhibitor ADSORPTION oilfield acidizing treatment
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Remove of Phenolic Compounds in Water by Low-Temperature Plasma: A Review of Current Research 被引量:1
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作者 Jufang ZHANG Jierong CHEN Xiaoyong LI 《Journal of Water Resource and Protection》 2009年第2期99-109,共11页
Phenolic compounds have very strong toxicity, so it has been paid sharply attention to find an effective way of controlling the wastewater containing phenolic compounds. The work on this subject done by domestic and o... Phenolic compounds have very strong toxicity, so it has been paid sharply attention to find an effective way of controlling the wastewater containing phenolic compounds. The work on this subject done by domestic and overseas scholars is studied in this paper, and the progress of researches on low-temperature plasma treatment is summarized through the electrical discharge types, mechanism, kinetics of phenolic compounds decomposition and combination of several methods with low-temperature plasma treatment. In addition, the crucial problem and the developing tendency on low-temperature plasma treatment for phenol-bearing wastewater are briefly discussed. 展开更多
关键词 LOW-TEMPERATURE Plasma treatment PHENOLIC compoundS Types of Electrical DISCHARGE Mechanism Kinetics Combination of SEVERAL Methods
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蒸汽处理对上部白肋烟重要香味物质的影响研究
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作者 吴键 赵路灿 +9 位作者 戴路 胡安福 夏倩 肖卫强 王骏 陈震 李林洪 夏骏 黄华 蒋健 《中国烟草学报》 CAS CSCD 北大核心 2024年第6期20-28,共9页
【目的】考察蒸汽处理对上部白肋烟重要香味物质的影响。【方法】利用动态水分吸附脱附仪,在95%相对湿度下,研究蒸汽处理温度和处理时长对上部白肋烟非酶棕色化反应产物、苯丙氨酸类降解产物、类胡萝卜素降解产物和西柏烷类降解产物含... 【目的】考察蒸汽处理对上部白肋烟重要香味物质的影响。【方法】利用动态水分吸附脱附仪,在95%相对湿度下,研究蒸汽处理温度和处理时长对上部白肋烟非酶棕色化反应产物、苯丙氨酸类降解产物、类胡萝卜素降解产物和西柏烷类降解产物含量的影响,分析这4类重要香味物质在不同处理条件下的变化趋势。【结果】在实验范围内,提高处理温度或增加处理时长会使非酶棕色化反应、类胡萝卜素降解、西柏烷类降解三类产物的含量先增加后减少,而苯丙氨酸类降解产物的含量则呈下降趋势。在60℃处理3h时,上部白肋烟这4类重要香味物质的总含量增加了12.53%,且香气和杂气等感官品质指标明显提高。【结论】蒸汽处理可作为一种有效调控上部白肋烟香味物质和感官品质的方法。 展开更多
关键词 上部白肋烟 蒸汽处理 香味物质 处理时长 处理温度
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激光硬化与渗氮复合处理H13钢组织与性能
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作者 曹驰 骆卫东 +2 位作者 陈志林 罗丽萍 陈贤武 《兰州理工大学学报》 CAS 北大核心 2024年第1期10-18,共9页
通过激光淬火/离子渗氮复合方法对H13钢进行表面改性处理,从而提高其表面的性能.利用X射线衍射技术、光学显微观察、扫描电子显微观察、能谱分析技术、显微硬度和纳米测试系统以及高频往复磨损试验,分别研究了离子渗氮、激光淬火、以及... 通过激光淬火/离子渗氮复合方法对H13钢进行表面改性处理,从而提高其表面的性能.利用X射线衍射技术、光学显微观察、扫描电子显微观察、能谱分析技术、显微硬度和纳米测试系统以及高频往复磨损试验,分别研究了离子渗氮、激光淬火、以及激光淬火与离子渗氮复合处理对H13钢改性层组织结构、力学性能、摩擦磨损性能的影响过程和影响机理.结果表明:复合处理工艺可以显著改善改性层的综合性能.和单一渗氮处理相比,复合处理改性层硬度和有效硬化层深度分别从1180 HV和80μm提高至1360 HV和550μm,摩擦系数和磨损率分别从0.68和5.78×10^(-8)mm^(3)·N^(-1)·m^(-1)降低至0.59和1.35×10^(-8)mm^(3)·N^(-1)·m^(-1).试样的硬度和耐磨性显著增加,平均摩擦系数明显降低. 展开更多
关键词 H13钢 激光淬火 离子渗氮 复合处理
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冻融与冻藏对乌鳢肌原纤维蛋白与酸菜鱼汤中特征风味物质结合特性的影响
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作者 袁丽 苏凯 +6 位作者 刘璐 冷伟军 张昊 李梦哲 石彤 包玉龙 高瑞昌 《食品科学》 EI CAS CSCD 北大核心 2024年第21期121-129,共9页
为探究冷冻处理对于鱼片与酸菜鱼汤中风味物质的结合特性影响,以乌鳢的肌原纤维蛋白为对象,研究冻融及冻藏处理对其理化特性及与己醛、辛醛、芳樟醇、月桂烯结合能力的变化。结果表明经过7 d贮藏后,冻融组肌原纤维蛋白溶解度降低了约26%... 为探究冷冻处理对于鱼片与酸菜鱼汤中风味物质的结合特性影响,以乌鳢的肌原纤维蛋白为对象,研究冻融及冻藏处理对其理化特性及与己醛、辛醛、芳樟醇、月桂烯结合能力的变化。结果表明经过7 d贮藏后,冻融组肌原纤维蛋白溶解度降低了约26%,相较于冻藏组,蛋白质氧化和三级结构变化程度更高,产生了更多可溶性聚集体;冻藏组溶解度降低了约33%,相较于冻融组,溶解度降低更加显著(P<0.05),产生了更多不溶性聚集体。影响肌原纤维蛋白冷冻聚集的主要作用力是非共价键。分子对接结果表明,芳樟醇、己醛和辛醛通过疏水作用和氢键与蛋白质结合,月桂烯与蛋白结合的主要驱动力为疏水相互作用。冷冻处理通过减少蛋白质与醛类化合物结合的巯基基团和氢键,降低了对己醛和辛醛的结合能力,蛋白质表面疏水性的提高,增加了对月桂烯和芳樟醇的结合能力,冻融处理后蛋白质对于月桂烯的结合能力强于冻藏处理组。研究结果可以为冷冻酸菜鱼预制品的风味控制提供理论依据和参考。 展开更多
关键词 肌原纤维蛋白 风味物质 冷冻处理 蛋白质聚集 结合能力
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Removal of benzene homologous compounds with chlorine dioxide
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作者 Chen Hui Wei Dongbin(Chemistry Department, Northwest Normal University, Lanzhou 730070,China)Wang Shuyan +1 位作者 Zhu Mingyang Liu Zhaochang(Department of Environmental Engineering, Tsinghua University, Beijing 100084, China)Keng Zhu(Chemistry Department, Pekin 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1996年第3期321-327,共7页
Chlorine dioxide composite disinfectant generator that produces a mixture of the oxidant gases comprising chlorine dioxide, chlorine, ozone and hydrogen peroxide through electrolyzing salt,is widely utilized in China ... Chlorine dioxide composite disinfectant generator that produces a mixture of the oxidant gases comprising chlorine dioxide, chlorine, ozone and hydrogen peroxide through electrolyzing salt,is widely utilized in China presently.The experiments in the paper focused on the removal of benzene homologous compounds such as styrene, methyl and dimethyl benzene. The results indicated that pH value was the most crucial factor to influence the treatment effects while reaction time and input way were considered as the importance. The removal rate for benzene could reach 60% when above 80% for methyl, and 100% for styrene and dimethyl. The variation mechanisms between chlorine dioxide,chlorite and chloride which determine the drinking water quality also discussed. 展开更多
关键词 Benzene homologous compounds chlorine dioxide drinking water treatment
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Qualitative and Quantitative Analysis of the Inorganic Materials Changes with Time in the Stages of the Wastewater Treatment Plant
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作者 Falah Bani Hani Mohammad Abdallah Qasaimeh Ahmad Qasaimeh 《Engineering(科研)》 2012年第8期409-415,共7页
Due to the importance of the inorganic materials removal from wastewater, experimental and analytical study to the concentration change with time of these materials became essential. In this work, experimental analyse... Due to the importance of the inorganic materials removal from wastewater, experimental and analytical study to the concentration change with time of these materials became essential. In this work, experimental analyses were performed to investigate the concentration changes of inorganic compounds during stages of activated sludge wastewater treatment plants at different sites in Jordan. The aim of this research is to examine the performance of the plants in treating pollutants and inorganic materials, and verify the quantitative and qualitative changes with time. Samples from the treatment stages were monthly taken and analyzed in the laboratory along a period of one year. The concentration changes of the inorganic solids in wastewater passing through treatment stages and aeration tank were recorded. Results show that the conventional treatment of the wastewater within different conditions in the year is not effective to decrease the concentrations of the inorganic compounds. Based on these results, we recommend adding tertiary advanced treatment unit in order to get acceptable water quality allowable to be reused for different purposes. 展开更多
关键词 Water treatment INORGANIC compoundS OPERATIONAL STAGES Concentration CHANGES
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油田挥发性有机物治理的对象分析及措施 被引量:1
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作者 刘志宏 《油气田地面工程》 2024年第3期64-68,共5页
为了适应“十四五”期间大气污染防治形势,有效控制油田挥发性有机物的排放,针对某油田地面生产系统现状、原油生产工艺以及油田挥发性有机物排放点多、排放无规律且组分复杂的特点,按照GB 39728—2020《陆上石油天然气开采工业大气污... 为了适应“十四五”期间大气污染防治形势,有效控制油田挥发性有机物的排放,针对某油田地面生产系统现状、原油生产工艺以及油田挥发性有机物排放点多、排放无规律且组分复杂的特点,按照GB 39728—2020《陆上石油天然气开采工业大气污染物排放标准》要求,通过对油气生产、集输、储存各环节进行分析梳理,确定挥发性有机物治理对象,并研究相应的治理措施,其中挥发性有机液体储存排放控制对象为某采油A厂4座净化油储罐和7座沉降罐(含水油),装卸控制对象为某卸油点的装载系统,甲烷排放治理对象为某站1处拉油点。对于挥发性有机液体的储存排放采用恢复站内密闭生产流程的治理措施;装卸采用法兰快速接头的半密闭装载方式;拉油点甲烷的排放治理,采用集输工艺。通过对以上油田挥发性有机物的治理,确保某油田挥发性有机液体储存和拉油点甲烷的达标排放。 展开更多
关键词 油田 挥发性有机物 存储 排放 治理措施
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