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Trace metals in atmospheric fine particles in one industrial urban city: Spatial variations, sources, and health implications

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Journal of Environmental Sciences 2014年第1期26卷 205-213页

作者： Shengzhen Zhou Qi Yuan weijun li Yaling Lu Yangmei Zhang Wenxing Wang Environment Research Institute Shandong University State Key Laboratory of Coal Resources and Safe Mining China University of Mining & Technology Chinese Academy of Meteorological Sciences China Meteorological Administration

Trace metals in PM2.5 were measured at one industrial site and one urban site during September, 2010 in Ji＇nan, eastern China. Individual aerosol particles and PM2.5 samples were collected concurrently at both sites. Mass concentrations of eleven trace metals （i.e., Al, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Sr, Ba, and Pb） and one metalloid （i.e., As） were measured by inductively coupled plasma atomic emission spectroscopy （ICP-AES）. The result shows that mass concentrations of PM2.5 （130μg/m3） and trace metals （4.03 μg/m3） at the industrial site were 1.3 times and 1.7 times higher than those at the urban site, respectively, indicating that industrial activities nearby the city can emit trace metals into the surrounding atmosphere. Fe concentrations were the highest among all the measured trace metals at both sites, with concentrations of 1.04 ixg/m 3 at the urban site and 2.41 Itg/m3 at the industrial site, respectively. In addition, Pb showed the highest enrichment factors at both sites, suggesting the emissions from anthropogenic activities existed around the city. Correlation coefficient analysis and principal component analysis revealed that Cu, Fe, Mn, Pb, and Zn were originated from vehicular traffic and industrial emissions at both sites; As, Cr, and part of Pb from coal-fired power plant; Ba and Ti from natural soil. Based on the transmission electron microscopy analysis, we found that most of the trace metals were internally mixed with secondary sulfate/organic particles. These internally mixed trace metals in the urban air may have different toxic abilities compared with externally mixed trace metals.

关键词： trace metals PM2.5 enrichment factors principal component analysis (PCA) industrial sources

SAR1B基因变异致乳糜微粒滞留病2例并文献复习

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中华儿科杂志 2024年第6期62卷 565-570页

作者：张宜琼伍俐亭成业陆怡李玉川冯佳燕邢清和李维君王建设复旦大学附属儿科医院肝病中心上海201102 江西省儿童医院临床营养科南昌330038 复旦大学附属儿科医院病理科上海201102 复旦大学生物医学研究院上海200032

目的总结SAR1B基因变异致乳糜微粒滞留病(CMRD)的基因型与临床特点。方法病例系列研究,总结2022年5月至2023年7月复旦大学附属儿科医院与江西省儿童医院诊治的2例CMRD患儿的临床资料与基因检测结果。分别以“乳糜微粒滞留病”“乳糜微... 详细信息

目的总结SAR1B基因变异致乳糜微粒滞留病(CMRD)的基因型与临床特点。方法病例系列研究,总结2022年5月至2023年7月复旦大学附属儿科医院与江西省儿童医院诊治的2例CMRD患儿的临床资料与基因检测结果。分别以“乳糜微粒滞留病”“乳糜微粒潴留病”“乳糜微粒保留病”“安德森病”“安德森综合征”“chylomicron retention disease”“Anderson syndrome”“Anderson disease”为检索词在中国知网、万方、维普、中国生物医学文献、PubMed数据库自建库至2024年1月进行检索。总结SAR1B基因变异致CMRD的主要临床表现及遗传学特点。结果2例患儿分别为1例11岁男童与1例4月龄女童。2例患儿均有脂质吸收不良、生长不良、胆固醇下降、转氨酶与肌酸激酶升高、维生素E缺乏,基因检查发现分别为SAR1B基因纯合变异(c.224A>G)和复合杂合变异(c.224A>G和c.554G>T)。例1随访1个月余,仍偶有下肢肌痛;例2随访1年余,生长已追赶至正常水平,2例患儿均无其他明显不适。文献复习符合检索条件中文文献0篇,英文文献22篇,包括本研究2例共有51例患者。51例CMRD患者中存在21种SAR1B基因变异,包含10种错义变异,4种无义变异,3种移码变异,框内缺失、剪接位点变异、大片段缺失与大片段缺失插入各1种。51例CMRD患者中,脂质吸收不良49例(腹泻或脂肪泻43例、呕吐17例、腹胀12例)、脂溶性维生素缺乏45例(维生素E缺乏43例、维生素A缺乏10例、维生素D缺乏9例、维生素K缺乏5例),生长不良35例,肝脏受累32例(转氨酶升高32例、脂肪肝5例、肝肿大3例),内镜下可见白色小肠黏膜29例,肌酸激酶升高17例,神经病变14例,眼部病变5例,棘形红细胞增多2例,心脏射血分数降低1例,无症状1例。结论CMRD常表现为婴儿早期脂质吸收不良和生长不良。实验室检测特点为低胆固醇血症,伴或不伴脂溶性维生素缺乏、肝酶和(或)肌酸激酶升高。SAR1B基因型以纯合型为主,错义变异多见。

关键词：低β脂蛋白血症吸收不良综合征儿童维生素E缺乏

基于泊松分布的木材顺纹方向统计损伤本构模型研究

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西南林业大学学报（自然科学） 2024年第5期44卷 193-199页

作者：刘文斌徐国林李维君柏亚双陈顺超西南林业大学土木工程学院云南昆明650233

基于概率密度函数构建材料统计损伤本构模型时,分布函数决定着本构模型精度。为解决现有研究中使用的分布函数大多适用于脆性材料、准脆性材料,并不适用于木材的难题,引入泊松分布函数,结合连续介质力学和木材顺纹方向变形破坏曲线几何... 详细信息

基于概率密度函数构建材料统计损伤本构模型时,分布函数决定着本构模型精度。为解决现有研究中使用的分布函数大多适用于脆性材料、准脆性材料,并不适用于木材的难题,引入泊松分布函数,结合连续介质力学和木材顺纹方向变形破坏曲线几何条件,构建木材顺纹方向统计损伤本构模型。结果表明:基于泊松分布函数构建本构模型方法可行;与Weibull分布、正态分布和对数正态分布相比,泊松分布更适用于构建木材本构模型;对于木材本构模型中受拉段应力-应变曲线,也可采用对数正态分布来构建。

关键词：木材统计损伤本构模型泊松分布

Introduction to the special issue on “COVID-19”

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Geoscience Frontiers 2022年第6期13卷 208-209页

作者： Luis F.O.Silva weijun li Teresa Moreno Department of Civil and Environmental Universidad de la CostaCUC Department of Atmospheric Sciences School of Earth SciencesZhejiang University Institute for Environmental Assessment and Water Research Consejo Superior de Investigaciones Científicas

COVID-19 pandemic is wreaking havoc and bringing the whole world into a standstill in an unprecedented fashion. Joint efforts from multiple sectors to address the various aspects of environment and public health through usage of green technologies have become essential. The application of cleaner and effective technologies can be expanded to management and control, pollution mitigation and valorization of waste. In this Special Issue of Geoscience Frontiers, we present contributions addressing the interactions of COVID-19 in relation to environment and human health.

关键词： bringing expanded COV

Composition and mixing state of water soluble inorganic ions during hazy days in a background region of North China

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Science China Earth Sciences 2015年第11期58卷 2026-2033页

作者： LU Yaling CHI JianWei YAO Lan YANG lingXiao li weijun WANG ZiFa WANG WenXing Environment Research Institute Shandong University Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Laboratory of Arid Climatic Change and Disaster Reduction of CMA Institute of Arid Meteorology of CMA School of Environment Science and Engineering Shandong University State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences

Knowledge of haze particles in background areas of North China is limited, although they have been studied well in urban settings. Atmospheric aerosol particles were collected at a background site in the North China Plain during 16–31 January, 2011. Water soluble inorganic ions of PM2.5 and physicochemical characteristics of individual particles on hazy and clean days were measured by Ion Chromatography(IC) and Transmission Electron Microscopy(TEM), respectively. Average PM2.5 mass concentration was 50.4±29.9 μg m?3 with 62.5±26.8 μg m?3 on hazy days and 19.9±11.5 μg m?3 on clean days. SO42?, NO3?, and NH4+ with a combined mass concentration of 19.0±11.5 μg m?3 accounted for 69.8%–89.4% of the total water soluble inorganic ions. Size distributions of SO42? and NH4+ showed one unimodal peak at 0.56–1.8 μm on hazy days, whereas NO3? appeared as bimodal peaks at 0.56–1.8 and 5.6–10 μm, respectively. Individual particle analyses showed that the dominant aerosols were a mixture of sulfate, nitrate, and carbonaceous species, which together determine their mixing states. 48-h air mass back trajectories on hazy days suggested that air masses crossed the polluted continental areas(such as Jing-jin-ji region and Shandong province) and entrained ground air pollutants 11–19 hours before reaching the background area. During long-range transport particles undergo ageing and tend to be internally mixed mainly due to condensation in the background atmosphere. Our results suggest that hygroscopic and optical properties of these aerosol particles in the background area differ substantially from those in urban areas.

关键词： water soluble inorganic ions individual particles secondary particles mixing state background region haze episode

Multi-objective optimization of methane production system from biomass through anaerobic digestion

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Chinese Journal of Chemical Engineering 2018年第10期26卷 2084-2092页

作者： weijun li Jakob Kj?bsted Huusom Zhimao Zhou Yi Nie Yajing Xu Xiangping Zhang Beijing Key Laboratory of Ionic liquids Clean Process State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Sino-Danish Center for Education and Research University of Chinese Academy of Sciences Department of Chemical & Biochemical Engineering Technical University of Denmark

This work addressed the multi-objective optimization of a biogas production system considering both environmental and economic criteria. A mixed integer non-linear programming(MINLP) model was established and solved with non-dominated sorting genetic algorithm Ⅱ, from which the Pareto fronts, the optimal technology combinations and operation conditions were obtained and analyzed. It's found that the system is feasible in both environmental and economic considerations after optimization. The most expensive processing section is decarbonization; the most expensive equipment is anaerobic digester; the most power-consuming processing section is digestion, followed by decarbonization and waste management. The positive green degree value on the process is attributed to processing section of digestion and waste management. 3:1 chicken feces and corn straw, solar energy, pressure swing adsorption and 3:1 chicken feces and rice straw, solar energy, pressure swing adsorption are turned out to be two robust technology combinations under different prices of methane and electricity by sensitivity analysis. The optimization results provide support for optimal design and operation of biogas production system considering environmental and economic objectives.

关键词： Biogas production system MINLP Multi-objective optimization Non-dominated sorting genetic algorithm Ⅱ Green degree value

Two-Stage Optimal Dispatching of Wind Power-Photovoltaic-Solar Thermal Combined System Considering Economic Optimality and Fairness

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Energy Engineering 2023年第4期120卷 1001-1022页

作者： weijun li Xin Die Zhicheng Ma Jinping Zhang Haiying Dong School of New Energy&Power Engineering Lanzhou Jiaotong UniversityLanzhou730000China China Petroleum Pipeline Engineering Corporation Langfang065000China Electric Power Research Institute of State Grid Gansu Electric Power Company Lanzhou730000China

Aiming at the problems of large-scale wind and solar grid connection,how to ensure the economy of system operation and how to realize fair scheduling between new energy power stations,a two-stage optimal dispatching model of wind power-photovoltaic-solar thermal combined system considering economic optimality and fairness is ***,the first stage dispatching model takes the overall economy optimization of the system as the goal and the principle of maximizing the consumption of wind and solar output,obtains the optimal output value under the economic conditions of each new energy station,and then obtains the maximum consumption space of the new energy ***,based on the optimization results of the first stage,the second stage dispatching model uses the dispatching method of fuzzy comprehensive ranking priority to prioritize the new energy stations,and then makes a fair allocation to the dispatching of the wind and solar ***,the analysis of a specific example shows that themodel can take into account the fairness of active power distribution of new energy stations on the basis of ensuring the economy of system operation,make full use of the consumption space,and realize the medium and long-term fairness distribution of dispatching plan.

关键词： Economic optimality fairness combined power generation the fuzzy comprehensive ranking priority optimal dispatching

Effects of tillage managements and maize straw returning on soil microbiome using 16S rDNA sequencing

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Journal of Integrative Plant Biology 2019年第6期61卷 765-777页

作者： Xinyao Xia Piaopiao Zhang linlin He Xingxing Gao weijun li Yuanyuan Zhou Zongxin li Hui li Long Yang Agricultural Big-Data Research Center College of Plant ProtectionShandong Agricultural UniversityTaian 271018China Maize Research Institute Shandong Academy of Agricultural SciencesJinan 250100China School of Biological Science and Technology University of JinanJinan 250022China Department of Clinical Taishan Medical UniversityTaian 271016China

Agricultural practices could affect bacterial diversity and community structure by altering soil physical and chemical properties. Straw returning and tillage practices are widely used in agriculture, however, the effects of these agricultural practices on microbiomes are still unclear. In the present study, we compared the 18 bacterial communities of soil with different straw returning and tillage treatment combinations. The V3-V4 regions of the 16S ribosomal RNA were amplified and analyzed by high-throughput sequencing technology. The results showed that the bacterial communities were consistently dominated by Acidobacteria, Proteobacteria, Actinobacteria, and Chloroflexi. Short-term straw returning and tillage practices significantly altered the diversity, relative abundance and functions of the soil microbiome. Soil subjected to rotary tillage and straw returning (RTS) combination possessed the highest bacterial diversity and lowest ratio of G+/G- bacteria, indicating that RTS could be an efficient integrated management system to improve microbiome in the short term. Double verifications based on relative abundance and network analysis, revealed close relationships of Mycobacterium and Methylibium with RTS, indicating they could serve as biomarkers for RTS. Investigating microbial changes under different agricultural practices will provide valuable foundations for land sustainable utilization and increase crop yields.

关键词： tillage managements maize straw returning microbiome using

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生物炭去除水中污染物的研究

山东化工 2024年第5期53卷 243-244,248页

作者：瑙莫汗李维俊刘佳露呼和浩特民族学院内蒙古呼和浩特010051 内蒙古自治区水利事业发展中心内蒙古呼和浩特010020

水污染问题一直是人们关心的重大问题,有多种方法可以去除水中污染物。生物炭作为含碳多孔材料,具有来源广泛、价格低廉、绿色环保的优点,是一类价廉易得的吸附材料。用生物炭吸附水中污染物既解决了环境污染问题,也实现了资源利用。本... 详细信息

水污染问题一直是人们关心的重大问题,有多种方法可以去除水中污染物。生物炭作为含碳多孔材料,具有来源广泛、价格低廉、绿色环保的优点,是一类价廉易得的吸附材料。用生物炭吸附水中污染物既解决了环境污染问题,也实现了资源利用。本文介绍了生物炭的制备和性质,探讨了消除水中污染物的机理和影响因素,分析了生物炭吸附水中污染物的效果,为进一步广泛应用生物炭材料提供了参考信息。

关键词：生物炭吸附机理影响因素水中污染物