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新型复合絮凝剂深度处理焦化废水的效果研究

工业水处理 2008年第5期28卷 35-38页

作者：周静李素芹北京科技大学冶金与生态工程学院

对比研究了PAC、PFS和PFAC、新型复合絮凝剂深度处理钢铁厂焦化废水絮凝效果。结果表明新型复合絮凝剂不仅用量最小,而且其除COD、浊度等的效果均好于其他絮凝剂,同时对其絮凝机理进行了初步探讨。

关键词：焦化废水絮凝复合絮凝剂

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绿泥石矿制备Na-X分子筛

化学通报 2018年第8期81卷 713-719页

作者：彭利冲李素芹北京科技大学冶金与生态工程学院北京100083

绿泥石化学成分以SiO_2、Al_2O_3为主,是合成分子筛的主要原料。由于绿泥石中存在Fe和Mg元素,为减少杂质对分子筛合成的影响,将绿泥石与Na_2CO_3进行煅烧活化,采用水和碱性溶液浸出绿泥石中的硅和铝离子,并通过ICP检测分析硅和铝的提取... 详细信息

绿泥石化学成分以SiO_2、Al_2O_3为主,是合成分子筛的主要原料。由于绿泥石中存在Fe和Mg元素,为减少杂质对分子筛合成的影响,将绿泥石与Na_2CO_3进行煅烧活化,采用水和碱性溶液浸出绿泥石中的硅和铝离子,并通过ICP检测分析硅和铝的提取率,进一步确定制备Na-X型分子筛的工艺参数。结果表明,采用Na_2CO_3预处理后绿泥石的硅和铝溶出率分别达到71%和67%。经SEM、XRD和FT-IR分析表明,Na-X型分子筛纯度较高,晶型完整,无其他杂质,热稳定性高,颗粒大小均匀,尺寸在1~2μm左右;Na-X分子筛的吸附行为符合Ⅰ型等温线,具有均匀的孔径,孔径主要区间为0.4~0.8 nm,为微孔吸附剂。此外,制备的Na-X分子筛满足中国化工行业标准(HG/T 2690-95)要求(吸水率大于23%)。

关键词：绿泥石尾矿 Na-X型分子筛预处理水热合成

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive liF and li3N-Rich electrode-electrolyte interphase liFePO4 cathode

河南粮食核心区建设中资源禀赋优势逆转与对策——基于粮食综合生产能力视角

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中国农业资源与区划 2012年第3期33卷 39-44页

作者：李素琴李烆一河南大学产业经济与农村发展研究所中国农业大学理学院化学系

河南农村剩余劳动力在粮食生产核心区建设中出现了要素禀赋优势逆转,即劳动力资源的短缺导致了粮食核心区建设与区域经济发展争夺劳动力资源的矛盾,土地的稀缺性导致了城镇化和工业化发展与粮食生产核心区建设在空间和区域上争夺土地资... 详细信息

河南农村剩余劳动力在粮食生产核心区建设中出现了要素禀赋优势逆转,即劳动力资源的短缺导致了粮食核心区建设与区域经济发展争夺劳动力资源的矛盾,土地的稀缺性导致了城镇化和工业化发展与粮食生产核心区建设在空间和区域上争夺土地资源的矛盾,这些因素制约了粮食生产能力。文章提出了引导投入务工与务农劳动力结构比例、妥善处理土地开发和保护耕地关系、以市场手段改善农业基础设施等具体建议。

关键词：农业劳动力过度转移资源禀赋优势逆转粮食核心区建设粮食生产能力河南省

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膨体聚四氟乙烯的制备及应用

中国塑料 2019年第2期33卷 138-143页

作者：李奔朱光明李素琴西北工业大学应用化学系西安710129 中国航空工业集团公司第一飞机设计研究院西安701189

综述了膨体聚四氟乙烯(ePTFE)的几种制备方法,包括拉伸方法、成孔剂方法以及纺丝方法,详细介绍了ePTFE在化工、纺织、医学、机械与航空航天领域的应用,并对其后续的研究工作进行了展望。

关键词：膨体聚四氟乙烯拉伸成孔剂纺丝

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飞机用电磁屏蔽橡胶材料

化工新型材料 2014年第1期42卷 177-178页

作者：李素琴李喜民刘刚中国航空工业集团公司第一飞机设计研究院西安710089

分析了电磁屏蔽技术对飞机安全飞行的重要性,介绍了电磁屏蔽橡胶材料的性能特点,并对国产电磁屏蔽橡胶材料的性能及工艺性能进行了试验验证,为飞机设计选材积累数据。

关键词：电磁屏蔽橡胶性能

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

TGF-β-regulated different iron metabolism processes in the development and cisplatin resistance of ovarian cancer

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Oncology Research 2024年第2期32卷 373-391页

作者： JIANFA WU QIANYI liAO li ZHANG suqin WU ZHOU liU Department of Gynecology Shanghai University of Medicine&Health Sciences Affiliated Zhoupu HospitalShanghaiChina Department of Gynecology Shanghai University of Medicine&Health SciencesShanghaiChina Department of Gynecology Gongshan People’s HospitalNujiang Lisu Autonomous PrefectureChina

The impact of different iron metabolism processes(DIMP)on ovarian cancer remains *** this study,we employed various gene chips and databases to investigate the role of DIMP in the initiation and development of ovarian *** was used to determine mutations in DIMP-associated genes in ovarian ***-Meier plotter was used to examine the influence of DIMP on the prognosis of ovarian *** analyzing 1669 serous ovarian cancer cases,we identified a range of mutations in iron metabolism genes,notably in those coding for the transferrin receptor(19%),melanotransferrin(19%),and ceruloplasmin(10%)in the iron import process,and glucose-6-phosphate isomerase(9%),hepcidin antimicrobial peptide(9%),metal regulatory transcription factor 1(8%),and bone morphogenetic protein 6(8%)in the iron regulation *** to the unaltered group,the group with gene alterations exhibited a higher tumor mutation burden count(43 vs.54)and more advanced histologic grade(78.19%vs.87.90%).Compared to the normal ovarian counterparts,a reduction in expression was observed in 9 out of the 14 genes involved in iron utilization and 4 out of the 5 genes involved in iron export in ovarian cancer;in contrast,an increase in expression was observed in 2 out of the 3 genes involved in iron storage in ovarian ***,in cisplatin-resistant cells compared to cisplatin-sensitive ones,the expression of all genes in iron storage and 13 out of 14 genes in iron import was decreased,while that of 8 out of the 10 genes in iron utilization was *** addition,survival curve analysis indicated that a higher expression in the majority of genes in the iron import process(12/21),or a reduced expression in most genes in the iron export process(4/5)correlated with poor progression-free ***,TGF-βcould regulate the expression of most iron metabolism-associated genes;particularly,expression of genes involved in the iron storage process(2/2)was inhibited aft

关键词： Chemoresistance Cisplatin Iron Ovarian neoplasms TGF-β

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拉伸工艺对聚四氟乙烯结构和性能的影响

中国塑料 2020年第1期34卷 1-5页

作者：李奔朱光明李素琴西北工业大学应用化学系西安710129 中国航空工业集团公司第一飞机设计研究院西安701189

通过设置不同的拉伸参数如拉伸温度、拉伸速率与拉伸长度,采用单向拉伸的方法处理聚四氟乙烯(PTFE),以研究拉伸工艺对PTFE结构和性能的影响。结果表明,拉伸处理使材料出现微纤和孔隙,提升拉伸温度与拉伸速率,增加拉伸长度均可有效降低... 详细信息

通过设置不同的拉伸参数如拉伸温度、拉伸速率与拉伸长度,采用单向拉伸的方法处理聚四氟乙烯(PTFE),以研究拉伸工艺对PTFE结构和性能的影响。结果表明,拉伸处理使材料出现微纤和孔隙,提升拉伸温度与拉伸速率,增加拉伸长度均可有效降低材料密度,增大孔隙率;随着拉伸长度的增加,材料的力学性能变化明显,拉伸强度由28.72 MPa增至46.13 MPa,断裂伸长率由145%减至85%;材料的压缩率由6.17%增至16.21%,弹性回复率由3.90%增至6.42%,相比拉伸处理前更适合作为密封材料使用。

关键词：聚四氟乙烯拉伸微纤孔隙