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Highly efficient separation of benzene+cyclohexane mixtures by extraction combined extractive distillation using imidazolium-based dicationic ionic liquids

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Green Chemical Engineering 2023年第3期4卷 312-323页

作者： Wanxiang Zhang wuji zhao Shuhang Ren Yucui Hou Weize Wu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China Department of Chemistry Taiyuan Normal UniversityShanxi030619China

Benzene(BEN)and cyclohexane(CYH),which have very close boiling points and a binary azeotrope,are the most difficult binary components in the separation of aromatic and non-aromatic hydrocarbons.This study further explored the separation mechanism and industrial application prospects of BEN+CYH mixtures separated by a dicationic ionic liquid(DIL)[C_(5)(MIM)_(2)][NTf_(2)]_(2) based on experimental research.The calculation results of the Conductor-like Screening model Segment Activity Coefficient(COSMO-SAC)model show that selectivity and solvent capacity of the DIL are significantly improved.The effects of different anions and cations on the micro-structure distribution and diffusion behavior of BEN+CYH system were investigated by quantum chemistry(QC)calculations and molecular dynamics(MD)simulations.The results indicate that the anion[NTf_(2)]_(2)has low polarity,uniform charge distribution,and a dual role of hydrogen bonding andπ-πbonding,and the cation[C_(5)(MIM)_(2)]^(2+) has stronger interaction with BEN and higher selectivity than conventional cations.The liquid-liquid extraction and extractive distillation(LLE-ED)process using an optimized 65 mol/mol DIL+35 mol/mol H_(2)O mixed solution as the extractant was proposed,which solved the problem of low product purity in the LLE process and high energy consumption in the ED process.Under the best operating conditions,the purity of CYH product was 99.9%,the purity of BEN product was 99.6%,the recovery rate of BEN reached 99.9%,and the recovery rate of DIL reached 99.9%.The heat-integrated LLE-ED process reduced total annual cost by 21.6%,and reduced CO_(2) emissions by 48.0%,which has broad industrial application prospects.

关键词： Dicationic ionic liquids Benzeneþcyclohexane mixture LLE-ED process Quantum chemical calculation Molecular dynamics simulation

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Distribution Characteristics of Geohazards Induced by the Lushan Earthquake and Their Comparisons with the Wenchuan Earthquake

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Journal of Earth Science 2014年第5期25卷 912-923页

作者： Zhiqiang Yin wuji zhao Xiaoguang Qin Institute of Geology and Geophysics Chinese Academy of Sciences China Institute of Geo-Environment Monitoring School of Earth Sciences and Resources China University of Geosciences

The Lushan Earthquake induced a large number of geohazards. They are widely distributed and caused serious damages. The basic characteristics, formation mechanisms and typical cases of geohazards induced by Lushan Earthquake are described, and compares to the relationships of Lushan and Wenchuan earthquakes between geohazards and earthquake magnitude, geomorphology, slope angle, elevation and seismic intensity in the most affected areas in the article.（1） The numbers and volumes of landslides and rockslides differ significantly between the two earthquakes due to their differing magnitudes. The Lushan Earthquake is associated with fewer and smaller-magnitude geohazards, within the immediate area, which mainly consist of small-and medium-sized shallow landslides and rockslides, and occur on steep slopes and mountain valleys. The largest landslide induced by Lushan Earthquake is the Gangoutou Landslide debris flow with a residual volume of about 2.48×106 m3. The most dangerous debris flow is at Lengmugou gulley in Baoxing County, which has similar geomorphological features and disaster modes as a previous disaster in Zhouqu County, Gansu Province.（2） Geohazards induced by the Lushan Earthquake show four mechanisms： cracking-rockslides-collision- scraping and then debris flows, cracking-rockslides, vibration-rainfall-rockslides-landslide and then debris flow, vibration-throwing or scrolling.（3） There are significant similarities and differences between the geohazards induced by these two earthquakes. The types of geohazards are the same but the volume, quantity and other factors differ： geohazards are concentrated on slope angles of 10°-40° in the Lushan Earthquake area, especially within 10°-20°, and at absolute elevation of 500-2000 m above sea level（a.s.l.）. Geohazards within the Wenchuan Earthquake area are concentrated on steeper slope angles of 30°-40° at higher absolute elevations of 1500-2000 m.s.l..

关键词： Lushan Earthquake Wenchuan Earthquake geohazards basic characteristics comparison.

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家世、仕官与叛乱——赵谂与北宋中后期政局之变

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中国典籍与文化 2024年第1期 31-44页

作者：霍无忌华东师范大学中文系古籍研究所

赵谂系北宋中后期普通下层文官之一,其职最高不过太学博士。然而,赵谂虽官职不显,其家族亦非名门望族,但其父祖由“夷獠”变为顺臣的过程,其本人由布衣而入官场、由朝廷命官变为叛臣的经历,与北宋中后期神、哲、徽三朝史事紧密地联系在... 详细信息

赵谂系北宋中后期普通下层文官之一,其职最高不过太学博士。然而,赵谂虽官职不显,其家族亦非名门望族,但其父祖由“夷獠”变为顺臣的过程,其本人由布衣而入官场、由朝廷命官变为叛臣的经历,与北宋中后期神、哲、徽三朝史事紧密地联系在一起,故对赵谂之家世、仕宦及其图谋之叛乱等事进行综合分析,可从一定程度上反映北宋中后期“国是”之变迁、宰执之进罢及边事之措置等问题,对于深入研究北宋中后期政治,或有裨益。

关键词：赵谂政局宋徽宗

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公共卫生事件处置中以心理安抚为基础的政府热线工作模式探讨

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健康教育与健康促进 2024年第2期19卷 218-220页

作者：钟磊杨建军董建树赵无记秦琼程文川上海市健康促进中心上海200040

本文总结2020—2022年新冠疫情期间,上海市卫生热线逐步明确并构建以个体需求出发进行公众情绪安抚的工作模式,在此基础上传达科学信息、收集分析公众诉求,为主管部门决策提供帮助,不断提升市民服务热线等政府热线的应急能力建设。

关键词：公共卫生事件心理安抚政府热线工作模式

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Distribution Characteristics of Geohazards Induced by the Lushan Earthquake and Their Comparisons with the Wenchuan Earthquake

Distribution Characteristics of Geohazards Induced by the Lu...

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中国科学院地质与地球物理研究所2014年度（第14届）...

The Lushan Earthquake induced a large number of geohazards. They are widely distributed and caused serious damages. The basic characteristics, formation mechanisms and typical cases of geohazards induced by Lushan Earthquake are described, and compares to the relationships of Lushan and Wenchuan earthquakes between geohazards and earthquake magnitude, geomorphology, slope angle,elevation and seismic intensity in the most affected areas in the article.(1) The numbers and volumes of landslides and rockslides differ significantly between the two earthquakes due to their differing magnitudes. The Lushan Earthquake is associated with fewer and smaller-magnitude geohazards,within the immediate area, which mainly consist of small-and medium-sized shallow landslides and rockslides, and occur on steep slopes and mountain valleys. The largest landslide induced by Lushan Earthquake is the Gangoutou Landslide debris flow with a residual volume of about 2.48×106 m3. The most dangerous debris flow is at Lengmugou gulley in Baoxing County, which has similar geomorphological features and disaster modes as a previous disaster in Zhouqu County, Gansu Province.(2)Geohazards induced by the Lushan Earthquake show four mechanisms: cracking-rockslides-collisionscraping and then debris flows, cracking-rockslides, vibration-rainfall-rockslides-landslide and then debris flow, vibration-throwing or scrolling.(3) There are significant similarities and differences between the geohazards induced by these two earthquakes. The types of geohazards are the same but the volume, quantity and other factors differ: geohazards are concentrated on slope angles of 10°–40° in the Lushan Earthquake area, especially within 10°–20°, and at absolute elevation of 500–2 000 m above sea level(a.s.l.). Geohazards within the Wenchuan Earthquake area are concentrated on steeper slope angles of 30°–40° at higher absolute elevations of 1 500–2 000 m.s.l..

关键词： Lushan Earthquake Wenchuan Earthquake geohazards basic characteristics comparison.

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Molecular characterization and developmental expression patterns of thyroid hormone receptors(TRs) and their responsiveness to TR agonist and antagonist in Rana nigromaculata

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Journal of Environmental Sciences 2014年第10期26卷 2084-2094页

作者： Qinqin Lou Yinfeng Zhang Dongkai Ren Haiming Xu Yaxian zhao Zhanfen Qin wuji Wei State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-environmental SciencesChinese Academy of Sciences College of Environment Nanjing University of Technology

Considering some advantages of Rana nigromaculata as an experimental species, we propose that this species, like Xenopus laevis, could be used to assay thyroid hormone（TH） signaling disrupting actions. To validate the utilizability of R. nigromaculata, we investigated the responsiveness of R. nigromaculata to a TH receptor（TR） agonist（T3） and antagonist（amiodarone） by analyzing expression, based on characterizing TR cDNA and developmental expression patterns. With high levels of identity with the corresponding genes in X. laevis, both TRα and TRβ in R. nigromaculata exhibited roughly similar developmental expression patterns to those of X. laevis, in spite of some species-specific differences. Both TRα and TRβ expression had greater changes in the liver and intestine than in the tail and brain during metamorphosis. T3 exposure for 2 days induced more dramatic increases of TRβ expression in stage 27 than in stage34 tadpoles but not in stage 42 tadpoles, showing that the responsiveness of R. nigromaculata to TH decreased with development and disappeared at the onset of metamorphic climax.Corresponding to greater changes of TRβ expression in the liver and intestine than in the tail and brain during metamorphosis, the liver and intestine had higher responsiveness to exogenous T3 than the tail and brain. Amiodarone inhibited T3-induced TRβ expression. Our results show that R. nigromaculata can be used as a model species for assaying TH signaling disrupting actions by analyzing TRβ expression, and intestine tissues at stage 27 are ideal test materials due to high responsiveness and easy accessibility.

关键词： Rana nigromaculata Thyroid hormone receptor Thyroid hormone signaling Developmental expression pattern Responsiveness

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Formation Mechanisms and Geomorphic Evolution of the Erlian Mudflow Fans, Eastern Guide Basin of the Upper Reaches of Yellow River

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 578-589页

作者： zhao wuji YIN Zhiqiang XU Qiang QIN Xiaoguang School of the Earth Sciences and Resources China University of Geosciences Beijing 100083 China China Institute of Geo-environment Monitoring Beijing 100081 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Several argillaceous platforms lie along the Yellow River（YR） of the eastern Guide Basin, northeastern Tibetan Plateau, and their compositions, formation processes, and geomorphic evolution remain debated. Using field survey data, sample testing, and high-resolution remote sensing images, the evolution of the Erlian mudflow fans are analyzed. The data show significant differences between fans on either side of the YR. On the right bank, fans are dilute debris flows consisting of sand and gravel. On the left bank, fans are viscosity mudflows consisting of red clay. The composition and formation processes of the left bank platforms indicate a rainfall-induced pluvial landscape. Fan evolution can be divided into two stages： early-stage fans pre-date 16 ka B.P., and formed during the last deglaciation; late-stage fans post-date 8 ka B.P.. Both stages were induced by climate change. The data indicate that during the Last Glacial Maximum, the northeastern Tibetan Plateau experienced a cold and humid climate characterized by high rainfall. From 16–8 ka, the YR cut through the Erlian early mudflow fan, resulting in extensive erosion. Since 8 ka, the river channel has migrated south by at least 1.25 km, and late stage mudflow fan formation has occurred.

关键词： the upper reaches of Yellow River Guide Basin mud-flow fan forming mechanism geomorphic evolution

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清华简《五纪》《参不韦》与齐“徙盐之玺”

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复旦学报（社会科学版） 2024年第3期66卷 85-89页

作者：赵平安清华大学人文学院历史系北京100084

齐“徙盐之玺”不仅是极其重要的战国文字资料,也是非常重要的社会经济政治史的资料。长期以来,虽颇受关注,释读却不见起色。2001年,我们曾把它释为“徙盐之玺”,但限于条件,对所从“卤”的发展演变未能做出很好的说明。本文根据清华简... 详细信息

齐“徙盐之玺”不仅是极其重要的战国文字资料,也是非常重要的社会经济政治史的资料。长期以来,虽颇受关注,释读却不见起色。2001年,我们曾把它释为“徙盐之玺”,但限于条件,对所从“卤”的发展演变未能做出很好的说明。本文根据清华简《五纪》《参不韦》等新见资料,论证了“徙盐之玺”中“卤”是一种独具特色的齐系文字的写法,完善了原来的释读,拓展了对清华简《五纪》《参不韦》齐系文字特征的研究,是利用战国文字区系理论精密化释字的一次尝试。

关键词：徙盐之玺卤齐系文字五纪参不韦

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Landslide Developmental Characteristics and Response to Climate Change since the Last Glacial in the Upper Reaches of the Yellow River, NE Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2014年第2期88卷 635-646页

作者： YIN Zhiqiang QIN Xiaoguang YIN Yueping zhao wuji WEI Gang Institute of Geology and Geophysics Chinese Academy of Sciences China Institute of Geo-environment Monitoring China University of Geosciences (Beijing) Qinghai Environmental Geological Prospecting Bureau

The upper reaches of the Yellow River in northeastern Tibetan Plateau are geohazards areas.The evolution of the Yellow River,chronology of some landslides,and spatiotemporal distribution characteristics of super large scale and giant landslides within the region are summarized using paleoclimate evidence,and the relationship between the intensive landslide period and climatic changes since the Last Glacial period is analyzed.It is concluded that （1） Super large scale and giant landslides are distributed widely within the region,particularly in the Qunke-Jianzha basin.（2） The chronological sequence of landslides is established by dating the slip zones of landslides and analyzing the relations between landslides and their overlying or underlying loess formations.Five landslide development periods are determined：53-49 ka BP,33-24 ka BP,10-8 ka BP,5-3.5 ka BP,and the present.（3） These correspond closely to warm and wet periods during the last 100,000 years,i.e.,two weak paleosol development stages of Malan loess deposited during the last Glacial period in the Chinese loess Plateau,L1-4 and L1-2 that belong to the marine oxygen isotope stage 3,the last deglaeial period,the Holocene Optimum,and the modern global warming period.（4） Landslide triggers may be closely linked to warm and wet periods related to rapid climatic transitions.

关键词： landslide developmental characteristics climate change upper reaches of the Yellow River response

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Polybrominated diphenyl ether (PBDE) in blood from children (age 9–12) in Taizhou, China

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Journal of Environmental Sciences 2011年第7期23卷 1199-1204页

作者： Xiaoyou Zhang Xianli Ruan Minchan Yan Yaxian zhao wuji Wei Zhanfen Qin Yongjian Yang Haiming Xu Yan Li Nanjing University of Technology Nanjing 210009 China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing 100085 China Taizhou Hospital Taizhou 317000 China Tongde Hospital Hangzhou 310012 China Taizhou No. 1 Middle School Taizhou 318000 China

Polybrominated diphenyl ethers （PBDEs） as ubiquitous persistent organic pollutants have attracted much attention in recent years. Exposure to PBDEs could induce a high health risk for children. The aim of this study was to investigate the PBDEs exposure of children （9–12 years） from Taizhou, China. Fifty-eight blood samples were collected in one school in a mountainous area in Taizhou. The concentrations of ∑9PBDEs （sum of BDE-28, -47, -99, -100, -153, -154, -183, -197 and -209） ranged from 2.66 to 33.9 ng/g lipid wet （lw） with a median of 7.22 ng/g lw. These concentrations were lower than those of children in USA, but close to European and Asian general population levels. The results showed that children in Taizhou countryside were at a low level of PBDEs exposure. The predominant congener was BDE-209, followed by BDE-28, -47, -197 and -153. High abundance of BDE-209 was consistent with the pollution background of PBDEs in China characterized by high brominated congeners as main pollutants.

关键词： polybrominated diphenyl ether children blood exposure Taizhou

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