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Study on the catalytic degradation of sodium lignosulfonate to aromatic aldehydes over nano-CuO:Process optimization and reaction kinetics

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Chinese Journal of Chemical Engineering 2023年第1期53卷 300-309页

作者： Yingjie Song Shuqi Zhong yingjiao li Kun Dong Yong Luo Guangwen Chu Haikui Zou Baochang Sun State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China

As one of the few renewable aromatic resources,the research of depolymerization of lignin into highvalue chemicals has attracted extensive attention in recent years.Catalytic wet aerobic oxidation(CWAO)is an effective technology to convert lignin like sodium lignosulfonate(SL),a lignin derivative,into aromatic aldehydes such as vanillin and syringaldehyde.However,how to improve the yield of aromatic aldehyde and conversion efficiency is still a challenge,and many operating conditions that significantly affect the yield of these aromatic compounds have rarely been investigated systematically.In this work,we adopted the stirred tank reactor(STR)for the CWAO process with nano-CuO as catalyst to achieve the conversion of SL into vanillin and syringaldehyde.The effect of operating conditions including reaction time,oxygen partial pressure,reaction temperature,SL concentration,rotational speed,catalyst amount,and NaOH concentration on the yield of single phenolic compound was systematically investigated.The results revealed that all these operating conditions exhibit a significant effect on the aromatic aldehyde yield.Therefore,they should be regulated in an optimal value to obtain high yield of these aldehydes.More importantly,the reaction kinetics of the lignin oxidation was explored.This work could provide basic data for the optimization and design of industrial operation of lignin oxidation.

关键词： Nano-CuO Sodium lignosulfonate Catalytic wet aerobic oxidation(CWAO) Aromatic aldehyde Reaction kinetics

Controllable and high-throughput preparation of microdroplet using an ultra-high speed rotating packed bed

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Chinese Journal of Chemical Engineering 2022年第8期35卷 116-124页

作者： Jing Xie Xiangbi Jia Dan Wang yingjiao li Bao-chang Sun Yong Luo Guang-wen Chu Jian-feng Chen State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China

Microdroplets and their dispersion,with a large specific surface area and a short diffusion distance,have been applied in various unit operations and reaction processes.However,it is still a challenge to control the size and size distribution of microdroplets,especially for high-throughput generation.In this work,a novel ultra-high speed rotating packed bed(UHS-RPB)was invented,in which rotating foam packing with a speed of 4000-12000 r·min^(-1) provides microfluidic channels to disperse liquid into microdroplets with high throughput.Then generated microdroplets can be directly dispersed into a continuous falling film for obtaining a mixture of microdroplet dispersion.In this UHS-RPB,the effects of rotational speed,liquid initial velocity,liquid viscosity,liquid surface tension and packing pore size on the average size(d_(32))and size distribution of microdroplets were systematically investigated.Results showed that the UHS-RPB could produce microdroplets with a d_(32) of 25-63μm at a liquid flow rate of 1025 L·h^(-1),and the size distribution of the microdroplets accords well with Rosin-Rammler distribution model.In addi-tion,a correlation was established for the prediction of d_(32),and the predicted d_(32) was in good agreement with the experimental data with a deviation within±15%.These results demonstrated that UHS-RPB could be a promising candidate for controllable preparation of uniform microdroplets.

关键词： Ultra-high speed rotating packed bed Microdroplet Controllable preparation High throughput

Synergistic interaction of three-dimensional ZnCdS@MoS2 heterostructures for high-efficiency visible-light photocatalytic degradation of dyes

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Progress in Natural Science:Materials International 2023年第4期33卷 442-449页

作者： yingjiao Zhai Haowen He Mingze Xu Hongbin Zhao Jinhua li Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing Nanophotonics and Biophotonics Key Laboratory of Jilin Province State Key Laboratory of High Power Semiconductor Lasers Changchun University of Science and Technology State Key Laboratory of Advanced Materials for Smart Sensing General Research Institute for Nonferrous Metals

High-performance photocatalysts should urgently be developed to efficiently solve serious environmental problems. Herein, we successfully synthesized a novel, visible-light activated, three-dimensional ZnCdS@MoS2photocatalyst using a simple, two-step hydrothermal process. Based on reaction time-dependence, the growth mechanism of “oriented attachment” of the ZnCdS@MoS2heterostructure is described in detail. The photodegradation of methylene blue(MB) indicated that the prepared sample has an outstanding photocatalytic activity owing to the accelerated photogenerated electron production rate, inhibited electron–hole pair recombination,improved visible light–utilization rate, and increased specific surface area. According to our experimental results,the degradation rate of MB using the ZnCdS@MoS2nanocomposite was as high as 99.3% after 100 min of visible-light irradiation. The photocatalyst remained stable without any obvious decrease in activity even after three cycles of use. This study provides a strong support for the design of high-performance photocatalysts and their application in optoelectronic devices.

关键词： Dye Heterostructure Photocatalytic Visible-light ZnCdS@MoS2

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香蕉茎秆纤维提取工艺优化及其表征

生物质化学工程 2024年第2期58卷 31-38页

作者：于昕樱李英教徐树英海南大学海口市固废物资源利用及环境保护重点实验室海南海口570228 海南大学化学化工学院海南海口570228

为了对农业废弃物香蕉茎秆进行综合利用,采用化学法脱胶工艺提取香蕉茎秆纤维。在单因素试验基础上,采用响应曲面法,以NaOH质量浓度、碱煮时间、碱煮温度为影响因素,以香蕉茎秆纤维的拉伸强度为响应值建立二次回归方程,通过响应面分析... 详细信息

为了对农业废弃物香蕉茎秆进行综合利用,采用化学法脱胶工艺提取香蕉茎秆纤维。在单因素试验基础上,采用响应曲面法,以NaOH质量浓度、碱煮时间、碱煮温度为影响因素,以香蕉茎秆纤维的拉伸强度为响应值建立二次回归方程,通过响应面分析得到其优化组合。结果表明:碱煮时间对香蕉茎秆纤维拉伸强度的影响最大,其次为NaOH质量浓度,最后为碱煮温度。当NaOH质量浓度8.76 g/L,碱煮时间3.98 h,碱煮温度80.72℃,料液比1∶20(g∶mL)时,香蕉茎秆纤维的脱胶率为82.4%,含纤维素67.69%,拉伸强度为433.93 MPa。傅里叶红外结果显示较佳工艺制备的香蕉茎秆纤维去除了大量半纤维素和木质素。扫描电镜图显示香蕉茎秆纤维的断裂截面呈现脆性-塑性复合型断裂形式。

关键词：香蕉茎秆纤维响应面法脱胶率机械性能

Sequence stratigraphy, paleogeography, and coal accumulation regularity of major coal-accumulating periods in China

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International Journal of Coal Science & Technology 2020年第2期7卷 240-262页

作者： Longyi Shao Xuetian Wang Dongdong Wang Mingpei li Shuai Wang yingjiao li Kai Shao Chao Zhang Caixia Gao Daxiao Dong Aiguo Cheng Jing Lu Congwei Ji Di Gao State Key Laboratory of Coal Resources and Safe Mining College of Geoscience and Surveying EngineeringChina University of Mining and Technology(Beijing)Beijing 100083China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590ShandongChina Innovation Technology Research Institute of Shaanxi Investment Group Co. Ltd.Xi'an 710061ShaanxiChina Shaanxi Coalbed Methane Development Company limited Xi'an 710119ShaanxiChina China National Administration of Coal Geology Beijing 100039China College of Resources and Environment Henan Polytechnic UniversityJiaozuo 454003HenanChina

There are 9 major coal-accumulating periods during geological history in China,including the Early Carboniferous,Late Carboniferous-Early Permian,Middle Permian,Late Permian,Late Triassic,Early-Middle Jurassic,Early Cretaceous,Paleogene and Neogene.The coal formed in these periods were developed in different coal-accumulating areas(CAA)including the North China,South China,Northwest China,Northeast China,the Qinghai–Tibet area,and China offshore area.In this paper,we investigated depositional environments,sequence stratigraphy,lithofacies paleogeography and coal accumulation pattern of five major coal-accumulating periods including the Late Carboniferous to Middle Permian of the North China CAA,the Late Permian of the South China CAA,the Late Triassic of the South China CAA,the Early-Middle Jurassic of the North and Northwest China CAA,and the Early Cretaceous in the Northeast China CAA.According to distribution of the coal-bearing strata and the regional tectonic outlines,we have identified distribution range of the coal-forming basins,sedimentary facies types and coal-accumulating models.The sequence stratigraphic frameworks of the major coal-accumulating periods were established based on recognition of a variety of sequence boundaries.The distribution of thick coals and migration patterns of the coal-accumulating centers in the sequence stratigraphic framework were analyzed.The lithofacies paleogeography maps based on third-order sequences were reconstructed and the distribution of coal accumulation centers and coal-rich belts were predicted.

关键词： Coal-accumulating period Coal-accumulating area Sequence stratigraphy Paleogeography China

Effects of Different Shading Treatments on Agronomic Characters of Cultivated Ginseng(Panax ginseng)in Farmland

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Agricultural Biotechnology 2018年第2期7卷 143-146,150页

作者： Hongpeng li yingjiao li Yuting ZHAO Xiangguo li Agricultural College of Yanbian University Yanji 133002Chin Meteorological Bureau of Tonghua Tonghua 134001China

As the main environmental factor of ginseng growth,illumination plays an important role in ginseng（ Panax ginseng） growth and development. Although ginseng is a shade-demanding plant,we need to get higher yield and quality under ideal light conditions. Three different illumination conditions for growth were created through different shading treatments. It was concluded that the adjustment of illumination according to monthly irradiance is beneficial to ginseng growth; appropriate illumination significantly affected root diameter; and SPAD value could also be used in the production of ginseng,but different light environments have influences on its accuracy. Reasonable light adjustment could improve the accuracy of the prediction value of SPAD.

关键词： Shade Illumination Panax ginseng SPAD valueHome

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山东医药 2024年第19期64卷 35-39页

作者：任海霞刘菊红李佳申颖娇李娟长治市人民医院肾内科山西长治046000

目的探讨血清甘露聚糖结合凝集素(MBL)、肿瘤坏死因子家族B细胞活化因子(BAFF)与磷脂酶A2受体(PLA2R)相关特发性膜性肾病(IMN)患者肾功能和疗效的关系。方法选取PLA2R相关IMN患者103例作为观察组,并根据疗效将PLA2R相关IMN患者分为未缓... 详细信息

目的探讨血清甘露聚糖结合凝集素(MBL)、肿瘤坏死因子家族B细胞活化因子(BAFF)与磷脂酶A2受体(PLA2R)相关特发性膜性肾病(IMN)患者肾功能和疗效的关系。方法选取PLA2R相关IMN患者103例作为观察组,并根据疗效将PLA2R相关IMN患者分为未缓解组(n=44)、缓解组(n=59);同期另选健康体检志愿者67例作为对照组。收集相关资料;用酶联免疫吸法检测血清MBL、BAFF、24 h尿蛋白,PA速率微板法试剂盒检测血肌酐,计算估计肾小球滤过率(eGFR)。Spearman相关法分析PLA2R相关IMN患者血清MBL、BAFF水平与肾功能指标的相关性;多因素Logistic回归分析影响PLA2R相关IMN患者疗效的因素,受试者工作特征(ROC)曲线分析血清MBL、BAFF对PLA2R相关IMN患者治疗未缓解的预测价值。结果观察组血清MBL、BAFF水平及24 h尿蛋白高于对照组,eGFR低于对照组(P均0.05)。白蛋白和eGFR升高为PLA2R相关IMN患者疗效的独立保护因素(P均<0.05),24 h尿蛋白、MBL和BAFF升高为独立危险因素(P均<0.05)。ROC曲线分析结果显示,血清MBL、BAFF联合预测PLA2R相关IMN患者治疗未缓解的曲线下面积(0.880)大于二者单独预测(0.791、0.787),比较差异有统计学意义(Z分别为2.694、2.613,P均<0.05)。结论血清MBL、BAFF水平升高与PLA2R相关IMN患者肾功能降低及疗效差有关,二者联合检测预测PLA2R相关IMN患者治疗未缓解的价值较高。

关键词：磷脂酶A2受体相关特发性膜性肾病甘露聚糖结合凝集素肿瘤坏死因子家族B细胞活化因子肾功能疗效

胸部CT上腔静脉定位与体外测量公式在非小细胞肺癌患者PICC置管长度测量中的应用

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中国实用乡村医生杂志 2024年第6期31卷 66-69页

作者：杨瑾章莹姣李明英陆洪江杭州市拱墅区天水武林街道社区卫生服务中心放射科解放军联勤保障部队第九〇三医院全科医学科解放军联勤保障部队第九〇三医院放射科

目的比较胸部CT上腔静脉定位与体外测量公式在非小细胞肺癌(non-smallcelllungcancer,NSCLC)患者，在经外周静脉穿刺置入中心导管(peripherallyinsertedcentralvenouscatheter,PICC)长度测量中的应用效果。方法回顾性分析在杭州市拱... 详细信息

目的比较胸部CT上腔静脉定位与体外测量公式在非小细胞肺癌(non-smallcelllungcancer,NSCLC)患者，在经外周静脉穿刺置入中心导管(peripherallyinsertedcentralvenouscatheter,PICC)长度测量中的应用效果。方法回顾性分析在杭州市拱墅区天水武林街道社区卫生服务中心接受PICC置管的82例NSCLC患者的临床资料。根据PICC置管长度测定方式将患者分为观察组和对照组各41例。观察组采用胸部CT上腔静脉定位测定；对照组采用体外测量公式进行计算，比较两组患者PICC置管一次到位率、置管操作时间、留置时间、疼痛评分、机械性静脉炎发生情况及护理满意度。结果两组PICC置管操作时间、疼痛评分差异无统计学意义(P>0.05)；观察组PICC置管一次到位率、PICC置管留置时间、穿刺部位机械性静脉炎发生情况、护理满意度均优于对照组，差异有统计学意义(P<0.05)。结论胸部CT上腔静脉定位法有利于提升PICC置管一次到位率，延长留置时间，降低机械性静脉炎发生风险和提高护理满意度。

关键词：胸部CT 上腔静脉定位体外测量公式非小细胞肺癌中心静脉导管

早期胃癌组织MCM4表达与内镜黏膜下剥离术后疾病复发的关系

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河南医学研究 2024年第4期33卷 594-599页

作者：王玉玉常廷民杨芳姬娟娟李光艳刘英娇新乡医学院第一附属医院内镜科河南新乡453100 新乡医学院第一附属医院消化内科河南新乡453100

目的探讨微小染色体维持蛋白4(MCM4)在早期胃癌组织中的表达及其与内镜黏膜下剥离术后疾病复发的关系。方法选取2017年2月至2020年1月在医院接受内镜黏膜下剥离术的273例早期胃癌患者作为观察组,另同期选取在医院接受胃镜下胃黏膜活检... 详细信息

目的探讨微小染色体维持蛋白4(MCM4)在早期胃癌组织中的表达及其与内镜黏膜下剥离术后疾病复发的关系。方法选取2017年2月至2020年1月在医院接受内镜黏膜下剥离术的273例早期胃癌患者作为观察组,另同期选取在医院接受胃镜下胃黏膜活检正常的200例受试者作为对照组。采用免疫组化法检测MCM4在胃癌组织和正常胃黏膜组织中的表达,比较不同病理特征早期胃癌患者胃黏膜癌组织MCM4表达。根据早期胃癌患者术后3 a内复发情况分为复发组和未复发组,绘制Kaplan-Meier曲线分析早期胃癌组织MCM4不同表达患者术后复发情况。采用Cox回归模型分析术后复发的影响因素。结果观察组胃黏膜癌组织MCM4高表达率高于对照组胃黏膜正常组织(P3 cm、黏膜下层浸润、低/未分化及胃癌组织MCM4高表达均是早期胃癌患者内镜黏膜下剥离术后复发的危险因素(P<0.05)。结论早期胃癌组织MCM4呈高表达,与浸润程度、分化程度有关,是内镜黏膜下剥离术后复发的危险因素。

关键词：胃癌微小染色体维持蛋白4 内镜黏膜下剥离术复发