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Research and development on mechanism of removal of indoor volatile organic compounds by plants

地球环境学报 2024年第4期15卷 583-595页

作者： LI Fangwei CUI Long CHENG Yan xue yonggang HUANG Yu School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Aerosol Chemistry and Physics State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China

Background,aim,and scope Owing to the rapid development of modernisation and urbanisation,living standards have gradually ***,the widespread use of high-energy-consuming indoor appliances and furniture has made indoor environments a primary environmental problem affecting human *** building syndrome(SBS)and building-related illness(BRI)have occurred,and indoor air conditions have been extensively *** indoor pollutants include CO,CO_(2),volatile organic compounds(VOCs)(such as the formaldehyde and benzene series),NOx(NO and NO_(2)),and polycyclic aromatic hydrocarbons(PAHs).VOCs have replaced SO_(2)as the“The Fourteenth Five-Year Plan”urban air quality assessment new *** VOCs can cause diseases such as cataract,asthma,and lung *** protect human health,researchers have proposed several indoor air purification technologies,including adsorption,filtration,electrostatic dust removal,ozonation,and plant ***,each technology has drawbacks,such as high operating costs,high energy consumption,and the generation of secondary waste or toxic *** degradation of VOCs as a bioremediation technology has the characteristics of low cost,high efficiency,and sustainability,thereby becoming a potential green solution for improving indoor air *** study introduces the research status and mechanism of plant removal of indoor VOCs and provides an experimental basis and scientific guidance for analysing the mechanism of plant degradation of *** and methods This study reviews studies on the harm caused by indoor pollutants to human health and related sources,mainly investigating the degradation of indoor formaldehyde,BTEX(benzene,toluene,ethylbenzene,and xylene)plant mechanisms,and research *** Plants can remove VOCs via stomatal and non-stomatal adsorption,interfoliar microbial,rhizosphere microbial,and growth ***,toluene,and xylene(BTX)are adsorbed by pores,hydrox

关键词： plants VOCs removal mechanism indoor air purification microorganism

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Characteristics and fate behavior of environmentally persistent free radicals in atmospheric particulate matter

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地球环境学报 2024年第4期15卷 596-611页

作者： WANG xueying CUI Long xue yonggang HO Kinfai HUANG Yu State Key Laboratory of Loess and Quaternary Geology Key Laboratory of Aerosol Chemistry and PhysicsInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China University of Chinese Academy of Sciences Beijing 100049China The Jockey Club School of Public Health and Primary Care The Chinese University of Hong KongHong KongChina CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China

Background,aim,and scope Environmentally persistent free radicals(EPFRs)have received significant attention due to their longer lifetime and stable existence in various *** strong environmental migration ability of particulate matter allows EPFRs to migrate over long-distance transport,thereby impacting the quality of the local atmospheric ***,EPFRs can also adhere to atmospheric particles and interact with typical gaseous pollutants to affect atmospheric chemical *** can produce some reactive organic species,promoting oxidative stress in the human body,damaging biological macromolecules and ultimately affecting the organism *** are considered as a novel type of pollutant that affects human *** their significance,there are few literatures available on the characteristics and fate behaviors of EPFRs up to ***,supplemental reviews are crucial for providing comprehensive understanding of *** and methods This review summarizes the characteristics of EPFRs in particulate matter,outlines the generation mechanism and influencing factors of EPFRs,and the impacts of EPFRs on environmental quality and organism *** The content of EPFRs in particulate matter ranges from 1017 to 1020 spins∙g−*** to the strong mobility of atmospheric particulate matter,the long-term exposure to high levels of EPFRs may aggravate the impact of particulate matter on human *** interaction between EPFRs and typical gaseous pollutants can alter their fate and influence atmospheric chemical *** are mainly produced by transition metal elements and substituted aromatic hydrocarbons through electron ***,the chemical bond rupture of organic substances through heat treatment or ultraviolet radiation can also produce EPFRs,and heterogeneous reactions are capable producing them as *** production of EPFRs is not only influenced by transition metal elements and precurso

关键词： particulate matter(PM) environmentally persistent free radicals(EPFRs) formation mechanism influencing factors

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Reorganization characteristics of speech cortex during speech restoration following total laryngectomy A functional magnetic resonance imaging follow-up

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Neural Regeneration Research 2011年第11期6卷 834-838页

作者： Jianzhong Yin yonggang xue Peng Lin Xuchu Weng Ji Qi Department of Radiology Tianjin First Central Hospital First Central Clinical College of Tianjin Medical University Tianjin 300192 China Department of Otolaryngology Tianjin First Central Hospital First Central Clinical College of Tianjin Medical University Tianjin 300192 China Institute of Psychology Chinese Academy of Sciences Beijing 100101 China

During speech restoration following laryngectomy, language-related cortical areas develop connections with new primary motor neurons. The present study followed up 18 patients after total resection of laryngeal carcinoma. According to an evaluation of pronunciation, patients were assigned to three groups： poor, moderate and good pronunciation. Functional magnetic resonance imaging revealed significant increases in the number of activated voxels and the intensity of activation changes in the left middle frontal gyrus, left precentral gyrus, left postcentral gyrus, left supplementary motor area, left anterior cingulate gyrus and right fusiform gyrus between the moderate pronunciation group compared with the poor and good pronunciation groups. We propose that these brain regions play an important role in the progress of speech restoration, and improvements in pronunciation learning for patients following laryngectomy. However, during the later period of speech restoration, the number of activated voxels and intensity changes in these regions decreased to the level of healthy controls, indicating that the learning and instruction effects weakened once patients had mastered pronunciation techniques

关键词： magnetic resonance imaging functional laryngeal carcinoma laryngectomy language training neuroplasticity

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Estimation of surface geometry on combustion characteristics of AP/HTPB propellant under rapid depressurization

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Defence Technology（防务技术） 2024年第3期33卷 546-558页

作者： Kaixuan Chen Zhenwei Ye Xiaochun xue yonggang Yu School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina School of Science Hangzhou Dianzi UniversityHangzhou 310018ZhejiangChina

The 2D sandwich model serves as a potent tool in exploring the influence of surface geometry on the combustion attributes of Ammonium perchlorate/Hydroxyl-terminated polybutadiene(AP/HTPB)propellant under rapid pressure *** thickness of the sandwich propellant is derived from slicing the 3D random particle packing,an approach that enables a more effective examination of the micro-flame *** analysis of the predicted burning characteristics has been performed with experimental *** findings demonstrate a reasonable agreement,thereby validating the precision and soundness of the *** on the typical rapid depressurization environment of solid rocket motor(initial combustion pressure is 3 MPa and the maximum depressurization rate is 1000 MPa/s).A-type(a flatter surface),B-type(AP recesses from the combustion surface),and C-type(AP protrudes from the combustion surface)propellant combustion processes are numerically *** comparison of the evolution of gas-phase flame between 0.1 and 1 ms,it is discerned that the flame strength and form created by the three sandwich models differ significantly at the beginning stage of depressurization,with the flame structures gradually becoming harmonized over *** are drawn by comparison extinction times:the surface geometry plays a pivotal role in the combustion process,with AP protrusion favoring combustion the most.

关键词： AP/HTPB propellant BDP model Rapid pressure decay Burning surface geometry

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High impact of vehicle and solvent emission on the ambient volatile organic compounds in a major city of northwest China

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Chinese Chemical Letters 2022年第5期33卷 2753-2756页

作者： yonggang xue Liqin Wang Suixin Liu Yu Huang Long Chen Long Cui Yan Cheng Junji Cao State Key Lab of Loess and Quaternary Geology(SKLLQG) Institute of Earth EnvironmentChinese Academy of Sciences(CAS)Xi’an 710061China CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China Guanzhong Plain Ecological Environment Change and Comprehensive Treatment National Observation and Research Station Xi’an 710061China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China

Monitoring of ambient volatile organic compounds(VOCs)was conducted within typical residentialcommercial area in the city of Xi’an in northwest China during typical ozone(O_(3))episodes,to investigate the major contributors to the characteristic of ambient VOCs and their impact on O_(3) *** the residential-commercial area,diurnal variation of VOCs was highly impacted by vehicle exhaust,fuel evaporation,and local solvent *** higher contributions(up to 60%)of VOCs from solvent use to the ozone formation potential were *** present findings highlight the urgent need for restrictions on the emission of VOCs from solvent use and non-vehicle-traffic-related sources,such as oil storage.

关键词： VOCs Vehicle exhaust Fuel evaporation Solvent using Northwest China

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Experiment and modelling of texture and sliding direction dependence on finger friction behavior

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Friction 2024年第9期12卷 1955-1968页

作者： Yuanzhe LI xue ZHOU Pengpeng BAI Zhonghuan XIANG yonggang MENG Liran MA Yu TIAN State Key Laboratory of Tribology in Advanced Equipment School of Mechanical EngineeringTsinghua UniversityBeijing 100084China

Humans rely on their fingers to sense and interact with external *** the tribological behavior between finger skin and object surface is crucial for various fields,including tactile perception,product appearance design,and electronic skin *** describing finger frictional behavior is always challenging,given the complex structure of the *** this study,the texture and sliding direction dependence of finger skin friction was quantified based on explicit mathematic *** proposed double-layer model of finger skin effectively described the nonlinear elastic response of skin and predicted the scaling-law of effective elastic modulus with contact ***,the skin friction model on textured surface considering adhesion and deformation factors was *** revealed that adhesive term dominated finger friction behavior in daily life,and suggested that object texture size mainly influenced friction-induced vibrations rather than the average friction *** with digital image correlation(DIC)technique,the effect of sliding direction on finger friction was *** was found that the anisotropy in finger friction was governed by the finger’s ratchet pawl structure,which also contributes to enhanced stick-slip vibrations in the distal sliding *** proposed friction models can offer valuable insights into the underlying mechanism of skin friction under various operating conditions,and can provide quantitative guidance for effectively encoding friction into haptics.

关键词： finger friction tactile perception tribological model textured surface sliding direction

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Distribution and Vertical Migration of Polycyclic Aromatic Hydrocarbons in Forest Soil Pits of Southeastern Tibet

Distribution and Vertical Migration of Polycyclic Aromatic H...

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第十八届中国科协年会——分12 大气雾霾及PM2.5控制先进技术研讨会

作者： yonggang xue Xiaoping WANG Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences

Polycyclic aromatic hydrocarbons(PAHs) are a series of semivolatile organic compounds that could be found throughout the earth, and some of PAHs and their derivatives are carcinogenic and mutagenic1,2]. In remote sites, final fate of organic pollutants is mainly controlled by air-soil interface processes3]. Forest were found to be important sink of organic pollutants4]. Tibet is surrounded by countries with high density population, and atmospheric pollutants could transport to inland of TP from South Asia under westerly and monsoon5]. The present study were deployed to investigate the vertical distribution of PAHs across both altitude gradient and soil layers in forest if southeastern Tibet. In addition, migrations of PAHs in soil pits were estimated. PAHs concentrations of forest soil on Tibet are at the low end of worldwide remote sites, and 2 rings PAHs are relatively active in volatilization and downward transport, and 3-6 rings PAHs could be tightly trapped in forest soil. With the relatively higher precipitation and lower temperature, PAHs are enriched in high altitude site in south side. In the surface soil-air interface, estimated fugacity fration indicates that soil-air exchange of 2 ring PAHs might be net volatilization, while PAHs with more rings might be mainly deposition. In the forest soil profiles, PAHs are fractionated by soil orgaic matter, higher leaching rate make low weight PAHs prefer distribution in deeper soil layers, while high weight PAHs were trapped in surface organic layers. In the surface organic layers, higher weight PAHs were enriched with soil ages. Positive matrix factorization(PMF) model result show that biomass burning might contributes to 61% of soil PAHs concentration, while vehicle exhaust contributes 39%.

关键词： PAHs soil pits vertical distribution soil-air exchange

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Machine learning will revolutionize perovskite solar cells

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The Innovation 2024年第3期5卷 13-14页

作者： Ziming Chen Shuang Pan Jing Wang yonggang Min Yihuang Chen Qifan xue State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

With the emergence of ChatGPT and its rapid iteration speed,artificial intelligence(AI)has undoubtedly become the driving force behind a new wave of technological *** more than half a century of development,AI has become akin to the steam engine of the Industrial Revolution,propelling humanity into the era of *** global industrial chain has also recognized that AI technology will spearhead a new wave of industrial transformation and *** learning(ML),driven by data,abstracts real-life problems into mathematical problems and solves them using *** is currently the mainstream method for addressing many AI *** solar cells(PSCs)are currently the focus of researchers around the world due to their high efficiency,low cost,and simple manufacturing *** are considered the most promising third-generation solar cell for *** 2011,the United States proposed the Materials Genome Initiative(MGI).The main idea is to utilize the“trinity”approach of computing,data,and experiments to transform the conventional“trial and error”model of materials research and development,which relies heavily on experience and experimentation,in order to enhance the quality,speed of discovery,development,production,and application of new *** by the MGI,research on the combination of ML with great application potential and rapidly developing PSC(ML&PSC)emerged(Figure 1).

关键词： utilize Figure doubt

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基于S-SEM的区域创新系统影响因素和路径研究

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科研管理 2021年第8期42卷 150-159页

作者：薛永刚广东药科大学医药商学院广东广州510006

创新是驱动经济增长和提高区域经济竞争力的一个关键因素,是保持经济持续增长的一个主要驱动力,在经济转型时期有必要研究创新影响因素及创新策略,增强区域科技创新能力。现有文献主要从创新影响因素、区域创新空间特征、区域创新效率... 详细信息

创新是驱动经济增长和提高区域经济竞争力的一个关键因素,是保持经济持续增长的一个主要驱动力,在经济转型时期有必要研究创新影响因素及创新策略,增强区域科技创新能力。现有文献主要从创新影响因素、区域创新空间特征、区域创新效率、创新对企业的影响等方面展开研究,取得了相关研究结论和成果。区域创新系统是一个多因素交互作用复杂社会系统,并且存在空间溢出效应,因此研究区域创新系统有必要考虑不同要素之间的交互作用效应和空间溢出效应对区域创新的影响。基于相关理论分析提出九个假设,建立了广东省区域创新系统的空间结构方程模型,从创新主体、创新要素、创新政策、内部经济环境、外部经济环境、专利申请、新产品销售交互作用视角下实证分析广东省区域创新系统影响因素和路径。以广东省21个市域创新数据为样本,基于ESDA方法分析了广东省区域创新系统空间特征和空间相关性,基于空间结构方程模型研究了广东省区域创新系统影响因素和影响机制。通过研究得到以下结论:1)创新政策、创新要素和外部经济环境对广东省区域创新系统具有正向影响,创新政策影响最大;2)创新主体对广东省区域创新具有不利影响;3)内部经济环境对区域创新系统具有正向直接影响,但是考虑到各因素交互作用后对新产品销售具有不利影响;4)区域创新空间相关性对广东省区域创新系统具有正向影响。根据研究提出以下建议:1)适当管控外资引入规模,限制有技术壁垒的外资企业,提高外资利用质量;2)改进现有高校和科研机构创新评价和激励制度,实施多元化和市场化的创新评价体系;3)建立政府主导的广东省创新系统公共平台,提供创新系统所需的信息交互、多方合作、成果交易和需求发布等功能;4)加大教育科技投入力度,营造创新氛围,增强创新人才的培养。

关键词：区域创新系统空间结构方程模型影响因素影响机制

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Barrier Effect of a Membrane on Malodorous Gases

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Meteorological and Environmental Research 2020年第1期11卷 58-60,65页

作者： Tingting ZHANG yonggang xue Qunbiao HE Xia LIU Suzhou Institute of Tongji University

After the experimental research on the barrier effect of PTFE membrane on malodorous gases,it was found that PTFE membrane had good gas permeability,and the barrier effect on malodorous gases NH3 and H2S was poor. After a layer of water film was formed on PTFE membrane,it had an obvious barrier effect on malodorous gases NH3 and H2S.

关键词： PTFE membrane Malodorous gases Barrier effect

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