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植物基生物再生沥青的路用性能及再生机理研究

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应用化工 2024年第4期53卷 791-796页

作者：余乐何兆益李晓民魏定邦赵静卓由诗园重庆交通大学土木工程学院重庆400074 重庆市城市建设投资(集团)有限公司重庆400023 甘肃省公路交通建设集团有限公司甘肃兰州730030 甘肃省交通规划勘察设计院股份有限公司甘肃兰州730030

采用热重分析仪、差示扫描量热仪和红外光谱仪分析了植物基生物再生剂(WL-2H)的热稳定性和再生机理,基于动态剪切流变实验、测力延度实验和弯曲梁流变实验,探究了原样沥青、老化沥青和再生沥青的流变性能与疲劳特性。结果表明,随着WL-2... 详细信息

采用热重分析仪、差示扫描量热仪和红外光谱仪分析了植物基生物再生剂(WL-2H)的热稳定性和再生机理,基于动态剪切流变实验、测力延度实验和弯曲梁流变实验,探究了原样沥青、老化沥青和再生沥青的流变性能与疲劳特性。结果表明,随着WL-2H掺量的增加,植物基生物再生沥青的车辙因子、蠕变恢复率、低温劲度模量和疲劳因子逐渐减小,不可恢复柔量、延度和劲度模量变化率逐渐增大,N_(f50)先增大后减小;当WL-2H掺量为7%左右时,植物基生物再生沥青的的路用性能可基本恢复至原样沥青水平;WL-2H具有良好的热稳定性,主要通过物理作用对老化沥青性能进行再生。

关键词：植物油再生沥青流变性能疲劳性能再生机理

Investigation of solution chemistry to enable efficient lithium recovery from low-concentration lithium-containing wastewater

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 639-650页

作者： Chunlong zhao Mingming he Hongbin Cao Xiaohong Zheng Wenfang Gao Yong Sun he zhao Dalong Liu Yanling Zhang Zhi Sun State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Beijing Engineering Research Center of Process Pollution Control Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Nottingham Ningbo China Ningbo 315100China henan Bingsheng Biotechnology Company Limited Kaifeng 475103China

In the production of lithium-ion batteries(LIBs)and recycling of spent LIBs,a large amount of low-concentration lithium-containing wastewater(LCW)is *** recovery of Li from this medium has attracted significant global attention from both the environmental and economic *** achieve effective Li recycling,the features of impurity removal and the interactions among different ions must be ***,it is generally dificult to ensure highly efficient removal of impurity ions while retaining Li in the solution for further *** this study,the removal of typical impurity ions from LCW and the interactions between these species were systematically investigated from the thermodynamic and kinetics *** was found that the main impurities(e.g.,Fe^+,AIP^+,Ca^2+,and Mg^2+)could be efficiently removed with high Li recovery by control-ling the ionic strength of the *** mechanisms of Fe^3+,Al^+,Ca^2+,and Mg^2+removal were investigated to identify the controlling steps and reaction *** was found that the precipitates are formed by a zero-order reaction,and the activation energies tend to be low with a sequence of fast chemical reactions that reach equilibrium very ***,this study focused on Li loss during removal of the impurities,and the corresponding removal rates of Fe^+,Al^+,Ca^2+,and Mg^2+were found to be 99.8%,99.5%,99%,and 99.7%,***-quently,high-purity LisPO4 was obtained via one-step ***,this research demonstrates a potential route for the effective recovery of Li from low-concentra-tion LCW and for the appropriate treatment of acidic LCW.

关键词： lithium-containing wastewater lithium phos-phate precipitation impurity ion

Continuous generation of lattice oxygen via redox engineering for boosting toluene degradation performances

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Chinese Journal of Chemical Engineering 2021年第6期34卷 258-266页

作者： Shiya he Zhimin You Xin Jin Yi Wu Cheng Chen he zhao Jian Shen Department of Environment and Resources Xiangtan UniversityXiangtan 411105China State Key Laboratory of heavy Oil Processing College of Chemical EngineeringChina University of PetroleumQingdao 266580China Beijing Engineering Research Center of Process Pollution Control Division of Environment Technology and EngineeringKey Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Excellent performances promoted by lattice oxygen have attracted wide attention for catalytic degradation of volatile organic compounds(VOCs).However,how to control the continuous regeneration of lattice oxygen from the support is seldom *** this study,we selected sepiolite supported manganese-cobalt oxides(Co_(x)Mn_(100-x)O_(y))as model catalysts by tuning Co/(Co+Mn)mass ratio(x=3%,10%,15%,and 20%)to enhance toluene degradation efficiency,owing to lattice oxygen regeneration by redox cycle existing at the interface and Mn species with high valence state,initiated by cobalt catalytic performance under the role of crystal field stability *** results of activity test show that the sepiolite-Co_(15)Mn_(85)O_(y)catalyst exhibit outperformances at 193℃with 10,000 h^(-1)*** addition,the catalyst existed at the bottom of the"volcano"curve correlated T_(50)or T_(90)with Co/(Co+Mn)weight ratio is sepiolite-Co_(15)Mn_(85)O_(y),conforming its *** characterized by investigating active sites structural and electronic properties,the essential of superior catalytic activity is attributed to the grands of lattice oxygen continuous formation resulted from redox engineering based on the high atomic ratio of surface lattice oxygen with continuous refilled from the support and that of Mn^(4+)/Mn^(3+)cycle initiated by cobalt catalytic *** in all,redox engineering,not only promotes grands of active species reversible regeneration,but supplies an alternative catalyst design strategy towards the terrific efficiency-to-cost ratio performance.

关键词： Redox engineering Crystal field stability phase Lattice oxygen Toluene degradation

施氮对我国甘薯产量及其构成因素影响的整合分析

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植物营养与肥料学报 2024年第8期30卷 1606-1620页

作者：纪洪亭赵韩伟曾燕楠程润东王士红王勇赵荷娟江苏丘陵地区南京农业科学研究所江苏南京210046

【目的】在全国尺度上,定量评价施氮对甘薯产量及其构成因素的影响,明确影响施氮效应的因素,为我国甘薯生产中氮肥合理施用提供参考。【方法】利用中国知网、万方、维普和Web of Science中英文数据库,以“甘薯”、“氮”、“氮肥”、“... 详细信息

【目的】在全国尺度上,定量评价施氮对甘薯产量及其构成因素的影响,明确影响施氮效应的因素,为我国甘薯生产中氮肥合理施用提供参考。【方法】利用中国知网、万方、维普和Web of Science中英文数据库,以“甘薯”、“氮”、“氮肥”、“产量”、“单株结薯数”、“单薯重”为关键词进行检索,基于以下标准对文献进行筛选:试验在我国农田进行;试验包含不施氮肥对照和施用不同量氮肥处理,且对照与处理磷钾肥用量相同;每个处理至少有3次重复,共筛选到45篇文献。筛选后的文献中,包含产量数据288组,单株结薯数数据191组,单薯重数据145组。利用Meta分析方法,定量分析施氮对甘薯产量及其构成因素的影响;通过亚组分析,评价不同因素对施氮效应的影响。【结果】与不施氮相比,施氮增加我国甘薯鲜薯单位面积产量1.7%、单薯重3.2%,降低单株结薯数1.2%。不同施氮量下,甘薯产量及其构成因素存在显著差异。随施氮量增加,鲜薯产量和单株结薯数增幅逐渐降低,增幅最大的施氮量均小于75 kg/hm^(2),单薯重呈先升高后下降的趋势,增幅最大的施氮量为75~150 kg/hm^(2)。长江流域薯区和南方薯区鲜薯单产增幅高于北方薯区;北方薯区、长江流域薯区、南方薯区适宜施氮量分别为35 t/hm^(2)时,适宜施氮量为<75 kg/hm^(2)。施氮处理下鲜食型甘薯增产幅度低于淀粉型甘薯,鲜食型甘薯适宜施氮量为<75 kg/hm^(2),淀粉型为75~150 kg/hm^(2)。施氮鲜薯产量增幅最高的施钾(K_(2)O)量为150~225 kg/hm^(2),尽管该施钾量范围内施氮处理的单株结薯数显著下降6.3%,但单薯重显著增加14.9%,导致鲜薯产量增加10.5%;施磷(P_(2)O_5)量为≤60 kg/hm^(2)时,施氮处理的鲜薯产量、单株结薯数和单薯重增幅最高,分别为7.2%、4.9%和5.8%;氮、磷、钾适宜的配施比例为1∶0~0.8∶1~3。中性土壤(6.520 g/kg)的土壤条件下,施氮处理的鲜薯产量增幅最高。【结论】施氮有助于提升我国甘薯产量,但施氮效果受区域、地力产量、磷钾肥施用量、土壤基础肥力、甘薯类型等因素影响。因此,在甘薯生产中,应充分考虑这些因素,制定适宜的施氮方案,以提高氮肥利用率和甘薯产量。

关键词：氮肥甘薯鲜薯产量产量构成因素土壤肥力整合分析

Enhancement of ultrasonic disintegration of sewage sludge by aeration

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Journal of Environmental Sciences 2016年第4期28卷 163-167页

作者： he zhao Panyue Zhang Guangming Zhang Rong Cheng School of Environment and Natural Resource Renmin University of China College of Environmental Science and Engineering Beijing Forestry University

Sonication is an effective way for sludge disintegration,which can significantly improve the efficiency of anaerobic digestion to reduce and recycle use of *** high energy consumption limits the wide application of *** order to improve ultrasonic sludge disintegration efficiency and reduce energy consumption,aeration was *** showed that sludge disintegration efficiency was improved significantly by combining aeration with *** aeration flow rate,gas bubble size,ultrasonic density and aeration timing had impacts on sludge disintegration *** that used in later stage of ultrasonic irradiation with low aeration flow rate,small gas bubbles significantly improved ultrasonic disintegration sludge *** the optimal conditions of 0.4 W/m L ultrasonic irradiation density,30 m L/min of aeration flow rate,5 min of aeration in later stage and small gas bubbles,ultrasonic sludge disintegration efficiency was increased by 45% and one third of ultrasonic energy was *** approach will greatly benefit the application of ultrasonic sludge disintegration and strongly promote the treatment and recycle of wastewater sludge.

关键词： Aeration Ultrasonic sludge disintegration Gas bubble size Ultrasonic irradiation density Ultrasonic irradiation stages

A Spectroscopic Study of the SU UMa-type Dwarf Nova YZ Cnc during its 2002 Superoutburst

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Chinese Journal of Astronomy and Astrophysics 2005年第6期5卷 601-609页

作者： Ying-he zhao Zong-Yun Li Xiao-An Wu Qiu-he Peng Department of Astronomy Nanjing University Nanjing 210093

We report on time-resolved spectroscopic observations of the SU Ursae Majoris dwarf nova, YZ Cnc for over llh on two nights during its 2002 January superoutburst. The spectra on the first day only showed absorption-line profiles, while on the second day the lines showed “W” profiles with blue and red troughs. The radial velocity curve of the absorption troughs and emission peaks of H/3 has an amplitude of 49±10 km s^-1 and a phase offset of -0.07±0.04, which are very similar to those measured in quiescence. However, the γ velocity deviates strongly from the systemic velocity measured in quiescence, by some ±60 km s^-1. Large shifts of -70 km s^-1 in the orbital-averaged velocity and -0.09 in the phase are also found in our observations. All these features can be well explained by a precessing, eccentric disk.

关键词： accretion, accretion disks -binaries close - novae, cataclysmic variables - stars dwarf novae - stars individual (YZ Cancri)

Combination of terrestrial reference frames based on space geodetic techniques in SHAO:methodology and main issues

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Research in Astronomy and Astrophysics 2017年第9期17卷 1-14页

作者： Bing he Xiao-Ya Wang Xiao-Gong Hu Qun-he zhao Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Aerospace Dynamics Xi'an 710043China

Based on years of input from the four geodetic techniques （SLR, GPS, VLBI and DORIS）, the strategies of the combination were studied in SHAO to generate a new global terrestrial reference frame as the material realization of the ITRS defined in IERS Conventions. The main input includes the time series of weekly solutions （or fortnightly for SLR 1983-1993） of observational data for satellite techniques and session-wise normal equations for VLBI. The set of estimated unknowns includes 3- dimensional Cartesian coordinates at the reference epoch 2005.0 of the stations distributed globally and their rates as well as the time series of consistent Earth Orientation Parameters （EOPs） at the same epochs as the input. Besides the final solution, namely SOL-2, generated by using all the inputs before 2015.0 obtained from short-term observation processing, another reference solution, namely SOL- 1, was also computed by using the input before 2009.0 based on the same combination of procedures for the purpose of comparison with ITRF2008 and DTRF2008 and for evaluating the effect of the latest six more years of data on the combined results. The estimated accuracy of the x-component and y-component of the SOL- 1 TRF-origin was better than 0.1 mm at epoch 2005.0 and better than 0.3 mm yr- 1 in time evolution, either compared with ITRF2008 or DTRF2008. However, the z-component of the translation parameters from SOL-1 to ITRF2008 and DTRF2008 were 3.4 mm and -1.0 ram, respectively. It seems that the z-component of the SOL-1 TRF-origin was much closer to the one in DTRF2008 than the one in ITRF2008. The translation parameters from SOL-2 to ITRF2014 were 2.2, -1.8 and 0.9 mm in the x-, y- and z-components respectively with rates smaller than 0.4 mmyr-1. Similarly, the scale factor transformed from SOL-1 to DTRF2008 was much smaller than that to ITRF2008. The scale parameter from SOL-2 to ITRF2014 was -0.31 ppb with a rate lower than 0.01 ppb yr-1. The external precision （WRMS） compared

关键词： astrometry w reference systems -- techniques: interferometers -- methods: data analysis

改性生物炭对Cd污染农田土壤的钝化修复机制及其对土壤细菌群落的影响

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环境科学 2024年第9期45卷 5557-5569页

作者：姜凌岳小琼安靖玥张思怡孙佳园李兆和柴丽红长安大学水利与环境学院西安710054 旱区地下水文与生态效应教育部重点实验室西安710054 水利部旱区生态水文与水安全重点实验室西安710054

为探究壳聚糖改性生物炭(钝化剂)对Cd污染农田土壤的钝化修复机制,通过盆栽试验,研究了钝化剂对土壤理化性质、黑麦草生物量、土壤酶活性及细菌群落结构和多样性的影响.结果表明,当钝化剂施用量从0.5%增加到3%时,土壤有效态Cd含量较对... 详细信息

为探究壳聚糖改性生物炭(钝化剂)对Cd污染农田土壤的钝化修复机制,通过盆栽试验,研究了钝化剂对土壤理化性质、黑麦草生物量、土壤酶活性及细菌群落结构和多样性的影响.结果表明,当钝化剂施用量从0.5%增加到3%时,土壤有效态Cd含量较对照显著降低,黑麦草地上和地下部分生物量分别较对照增加了1.08~1.56倍和1.00~1.68倍,富集和运转系数分别降低了6.15%~30.00%和10.42%~31.25%.相关分析结果表明,土壤pH、CEC、SOM、AN、AP和AK与DTPA-Cd之间呈显著负相关关系,表明钝化剂的施加通过改变土壤理化性质,促进了对土壤中Cd的钝化.高通量测序结果显示,钝化剂的施加改变了土壤细菌群落结构和多样性,表现为α多样性的显著下降,不同处理组间菌群明显分离,鞘氨醇单胞菌属(Sphingomonas)和芽球菌属(Blastococcus)等有益菌群相对丰度增加.土壤脲酶和纤维素酶活性增加,蔗糖酶和过氧化氢酶活性降低.研究结果为生物炭改性材料在Cd污染农田土壤修复中的应用提供理论依据和技术参考.

关键词：生物炭细菌群落酶活性 Cd污染土壤钝化修复

熔融沉积成型3D打印聚醚醚酮工艺优化研究进展

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高分子通报 2024年第3期37卷 316-327页

作者：王成硕颜邓伊任浩浩何彦钊孙初锋赵红梅李婷婷赵向飞郭蕊烟台先进材料与绿色制造山东省实验室烟台中科先进材料与绿色化工产业技术研究院烟台264006 环境友好复合材料国家民委重点实验室甘肃省生物质功能复合材料工程研究中心甘肃省高校环境友好复合材料及生物质利用省级重点实验室西北民族大学化工学院兰州730030 中国科学院兰州化学物理研究所固体润滑国家重点实验室兰州730000 兰州市口腔医院兰州730000

聚醚醚酮(PEEK)因其具有耐高温、耐腐蚀、高硬度、质量轻、耐疲劳等特点,被广泛应用于机械制造、航空航天等高端领域,可作为金属材料的替代产品。随着科技的进步,PEEK材料被用于精密机械和复杂材料的制造原料,传统注塑成型已无法满足微... 详细信息

聚醚醚酮(PEEK)因其具有耐高温、耐腐蚀、高硬度、质量轻、耐疲劳等特点,被广泛应用于机械制造、航空航天等高端领域,可作为金属材料的替代产品。随着科技的进步,PEEK材料被用于精密机械和复杂材料的制造原料,传统注塑成型已无法满足微精密、高强度零部件的需要,限制了其进一步发展和应用。然而,将3D打印技术与PEEK材料体系结合为其制造和应用的发展提供了全新的思路,其中熔融沉积成型(FDM)3D打印PEEK技术的发展尤其突出,但通过FDM成型PEEK的工艺参数因其制造方法的局限性而尚未形成统一标准。因此,本文通过综述近年来FDM工艺参数对PEEK力学性能和结晶度影响的相关研究,总结出FDM打印PEEK的最佳工艺参数,并对FDM打印PEEK的发展前景进行展望。

关键词：聚醚醚酮(PEEK) 熔融沉积成型(FDM) 工艺参数力学性能