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Particuology 2023年第9期80卷 140-147页

作者： Qiuzi Shu chenglei pei Xiaoluan Lin Dachi Hong Senchao Lai Yingyi Zhang The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou510006China Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center Guangzhou510006China

Amines are important nitrogen-containing compounds in fine particles(PM2.5)in the *** are necessary for in-depth understanding on the characteristics,sources and atmospheric processes of *** this study,the observation of ten C_(1)–C_(4) aminiums in PM_(2.5) was conducted in January and March of 2021 in suburban *** concentration and composition of aminiums showed significant differences between the pollution episodes and non-episode *** difference was also observed between winter and *** influence of meteorological factors(i.e.,wind speed,atmospheric pressure,temperature and relative humidity)was *** variations of aminiums were also affected by different *** sources were suggested to be major contributor to aminiums in the pollution episodes,while biological sources were important sources to aminiums in the non-episode periods,especially in *** matrix factorization receptor model was applied to investigate the source contributions,and four major sources were *** results show that vehicular emission,industrial production,biological emission and soil/dust were the major sources of *** study emphasizes the importance of source contribution and meteorological conditions on the variations of aminiums,which provides further understanding of organic nitrogen in the atmosphere.

关键词： Amine lon chromatography Pollution episode Anthropogenic sources Biological emission Positive matrix factorization

Seasonal variations of mass absorption efficiency of elemental carbon in PM_(2.5) in urban Guangzhou of South China

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Journal of Environmental Sciences 2023年第11期133卷 83-92页

作者： chenglei pei Yunfei Wu Jun Tao Leiming Zhang Tao Zhang Runqi Zhang Sheng Li State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center Guangzhou 518049China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Institute for Environmental and Climate Research Jinan UniversityGuangzhou 510632China Air Quality Research Division Science and Technology BranchEnvironment and Climate Change CanadaTorontoCanada Guangdong Ecological and Environmental Monitoring Center Guangzhou 510308China

This study investigates seasonal variations of mass absorption efficiency of elemental carbon(MAE_(EC))and possible influencing factors in urban Guangzhou of South *** concentrations of elemental carbon(EC)and organic carbon(OC)in PM_(2.5) and aerosol absorption coefficient(b_(ap))at multi-wavelengths were simultaneously measured in four seasons of 2018-2019 at hourly resolution by a semi-continuous carbon analyzer and an *** average mass concentrations of EC were in the range of 1.36-1.70μgC/m^(3) with a lower value in summer than in the other seasons,while those of OC were in the range of 4.70–6.49μgC/m^(3) with the lowest value in summer and the highest in *** exhaust from local traffic was identified to be the predominant source of carbonaceous *** average aerosol absorption Angstrom exponents(AAE)were lower than 1.2 in four seasons,indicating EC and b_(ap) were closely related with vehicle *** MAE EC at 550 nm was 11.0,8.5,10.4 and 11.3 m^(2)/g in spring,summer,autumn,and winter,*** MAE EC was related with the high mass ratio of non-carbonaceous aerosols to EC and high ambient relative humidity.

关键词： Vehicle exhaust Non-carbonaceous aerosols Absorption enhancement Relative humidity

Evaluation of laboratory and environmental exposure systems for protein modification upon gas pollutants and environmental factors

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Journal of Environmental Sciences 2024年第9期143卷 213-223页

作者： Zhiwei Pan ShiyiWu Qiaoze Zhu Fobang Liu Yongjian Liang chenglei pei Haoyu Jiang Yingyi Zhang Senchao Lai The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center Guangzhou 510006China State Key Laboratory of Organic Geochemistry Guangdong Key Laboratory of Environmental Protection and Resources Utilizationand Joint Laboratory of the Guangdong-Hong Kong-Macao Greater Bay Area for the EnvironmentGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China

Chemical modifications of proteins induced by ambient ozone(O_(3))and nitrogen oxides(NOx)are of public health concerns due to their potential to trigger respiratory *** laboratory and environmental exposure systems have been widely used to investigate their relevant mechanism in the *** bovine serum albumin(BSA)as a model protein,we evaluated the two systems and aimed to reduce the uncertainties of both the reactants and products in the corresponding kinetic *** the laboratory simulation system,the generated gaseous pollutants showed negligible *** layers of BSA were coated on the flow tube with protein extraction recovery of 87.4%.For environmental exposure experiment,quartz fiber filter was selected as the upper filter with low gaseous O_(3)(8.0%)and NO_(2)(1.7%)losses,and cellulose acetate filter was appropriate for the lower filter with protein extraction efficiency of 95.2%.The protein degradation process was observed without the exposure to atmospheric oxidants and contributed to the loss of protein monomer mass fractions,while environmental factors(e.g.,molecular oxygen and ultraviolet)may cause greater protein monomer *** on the evaluation,the study exemplarily applied the two systems to protein modification and both showed that O_(3) promotes the protein oligomerization and nitration,while increased temperature can accelerate the oligomerization and increased relative humidity can inhibit the nitration in the environmental exposure *** developed laboratory and environmental systems are suitable for studying protein modifications formed under different atmospheric conditions.A combination of the two will further reveal the actual mechanism of protein modifications.

关键词： Protein modification Laboratory simulation Environmental exposure Oligomerization Nitration

One-year observation of the mixing states of oxygenated organics-containing single particles in Guangzhou,China

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 155-169页

作者： Liyuan Mao Suxia Yang Xiaoya Cheng Sulin Liu Duanying Chen Zhen Zhou Mei Li chenglei pei Chunlei Cheng Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for the On-line Source Apportionment System of Air PollutionJinan UniversityGuangzhou510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou510632China Guangzhou Research Institute of Environment Protection Co. Ltd.Guangzhou510620China Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province Guangzhou510030China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou570228China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy SciencesXi’an710061China

Oxygenated organic molecules(OOMs)play an important role in the formation of secondary organic aerosols(SOAs),but the mixing states of OOMs are still *** study investigates the mixing states of OOM-containing single particles from the measurements taken using a single particle aerosol mass spectrometer in Guangzhou,China in ***,the particle counts of OOM particles and the mass concentration of secondary organic carbon(SOC)exhibited similar temporal trends throughout the entire *** OOM particles were consistently enriched in secondary ions,including ^(16)O^(−),^(26)CN^(−),^(46)NO_(2)^(−),^(62)NO_(3)^(−),and ^(97)HSO_(4)^(−).In contrast,the number fractions and diurnal patterns of OOM particles among the total detected particles showed similar distributions in August and October;however,the SOC ratios in fine particulate matter were quite different,suggesting that there were different mixing states of single-particle oxygenated *** addition,further classification results indicated that the OOM particles were more aged in October than August,even though the SOC ratios were higher in ***,the distribution of hydrocarbon fragments exhibited a notable decrease from January to October,emphasizing the more aged state of the organics in *** addition,the sharp increase in elemental carbon(EC)-OOM particles in the afternoon in October suggests the potential role of EC in the aging process of ***,in contrast to the bulk analysis of SOC mass concentration,the mixing states of the OOM particles provide insights into the formation process of SOAs in field studies.

关键词： Oxygenated organics Single particles Mixing state Secondary formation Photochemistry

Detection of polycyclic aromatic hydrocarbons using a high performance-single particle aerosol mass spectrometer

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Journal of Environmental Sciences 2023年第2期124卷 806-822页

作者： Yao Zhang chenglei pei Jinwen Zhang Chunlei Cheng Xiufeng Lian Mubai Chen Bo Huang Zhong Fu Zhen Zhou Mei Li Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air pollutionJinan UniversityGuangzhou 510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 510632China Guangzhou Environmental Monitoring Center Guangzhou 510030China Guangzhou Hexin Analytical Instrument Company Limited Guangzhou 510530China

The real-time detection of the mixing states of polycyclic aromatic hydrocarbons(PAHs)and nitro-PAHs in ambient particles is of great significance for analyzing the source,aging process,and health effects of PAHs and nitro-PAHs;yet there is still few effective technology to achieve this type of *** this study,11 types of PAH and nitro-PAH standard sampleswere analyzed using a high performance-single particle aerosolmass spectrometer(HP-SPAMS)in lab *** identification principles‘parent ions’and‘mass-to-charge(m/z)=77’of each compound were obtained in this *** was found that different laser energies did not affect the identification of the parent *** comparative experiments of ambient atmospheric particles,cooking and biomass burning emitted particles with and without the addition of PAHs were conducted and ruled out the interferences from primary and secondary organics on the identification of ***,the reliability of the characteristic ions extraction method was evaluated through the comparative study of similarity algorithm and deep learning *** addition,the real PAH-containing particles from vehicle exhaust emissions and ambient particles were also *** study improves the ability of single particle mass spectrometry technology to detect PAHs and nitro-PAHs,and HP-SPAMS was superior to SPAMS for detecting single particles containing PAHs and *** study provides support for subsequent ambient observations to identify the characteristic spectrum of single particles containing PAHs and nitro-PAHs.

关键词： Single particle Polycyclic aromatic hydrocarbons Identification principles Mass spectrometry Aerosol

差分吸收激光雷达监测广州市臭氧垂直分布特征

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中国激光 2019年第12期46卷 271-279页

作者：王馨琦张天舒裴成磊陈多宏吕立慧项衍安徽大学物质科学与信息技术研究院安徽合肥230601 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室安徽合肥230601 广州市环境监测中心站广东广州510030 广东省环境监测中心国家环境保护区域空气质量监测重点实验室广东省环境保护大气二次污染研究重点实验室广东广州510308

利用差分吸收臭氧激光雷达对广州市对流层臭氧垂直结构进行长期连续观测,给出了广州市臭氧垂直结构的日变化特征,针对局地污染和区域传输两种不同的臭氧污染模式特征进行分析,提出臭氧污染模式的判定方法。结果表明:广州市臭氧全年日变... 详细信息

利用差分吸收臭氧激光雷达对广州市对流层臭氧垂直结构进行长期连续观测,给出了广州市臭氧垂直结构的日变化特征,针对局地污染和区域传输两种不同的臭氧污染模式特征进行分析,提出臭氧污染模式的判定方法。结果表明:广州市臭氧全年日变化规律明显,午后单峰特征突出;臭氧浓度季节变化规律为夏季臭氧浓度最高,冬季浓度最低,春季和秋季差异较小;在局地污染过程中,高浓度的臭氧主要集中在近地面,并且随着高度的增大而逐渐减小,0.7 km以下臭氧浓度的递减速率随高度增大而增大,1.5~2 km的臭氧浓度趋于均匀;针对三个高度区间,给出了臭氧外部输送的特征值,分析了在同一高度上颗粒物消光系数和臭氧浓度的相关性,并结合气象场分析了各个季节臭氧输送的主导方向。

关键词：遥感差分吸收激光雷达臭氧局地污染区域传输

2016—2020年广州市PM_(2.5)时空分布特征

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环境科学学报 2022年第12期42卷 273-285页

作者：陈彦宁张金谱裴成磊邱晓暖陈漾广东省广州生态环境监测中心站广州510006 中国科学院广州地球化学研究所有机地球化学国家重点实验室广东省环境资源利用与保护重点实验室广州510640 中国科学院大学北京100049

对大气污染物进行时空分布特征研究是开展大气污染防治的关键技术支撑.本研究基于广州市52个城市环境空气质量监测站点数据,采用系统聚类法、经验正交函数(EOF)等方法分析了2016—2020年广州市PM_(2.5)浓度的时空分布特征.结果表明:(1)2... 详细信息

对大气污染物进行时空分布特征研究是开展大气污染防治的关键技术支撑.本研究基于广州市52个城市环境空气质量监测站点数据,采用系统聚类法、经验正交函数(EOF)等方法分析了2016—2020年广州市PM_(2.5)浓度的时空分布特征.结果表明:(1)2016—2020年广州市PM_(2.5)污染改善显著,PM_(2.5)年均浓度从35.9μg·m^(-3)下降至23.0μg·m^(-3),达标比例由96.2%上升至100%;PM_(2.5)干季平均浓度为湿季的1.54倍,国控点超标天数为湿季的10.5倍;PM_(2.5)浓度日变化曲线峰谷值浓度差由7.5μg·m^(-3)下降至3.9μg·m^(-3),日变化幅度趋于平缓.(2)广州市PM_(2.5)浓度最高值区主要分布在东西两侧,高值区域范围逐年减小,全市PM_(2.5)浓度分布趋于均匀;采用系统聚类法可将广州市PM_(2.5)分成北部、中北部、南部、中南部4个污染区,其中,北部区PM_(2.5)浓度下降率仅为其他污染区的1/2,推测其PM_(2.5)浓度下降可能更多地由区域背景浓度的下降贡献;EOF分解前3模态累积方差贡献率达93%,分别可表征PM_(2.5)总体污染程度、在南北方向上的区域输送特征及由外围区域向中心城区聚集的污染特征.

关键词： PM_(2.5) 广州时空分布系统聚类法经验正交函数(EOF)

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广州市灰霾监测颗粒物监测仪安装维护浅析

现代科学仪器 2011年第2期 124-125+128页

作者：梁永健裴成磊广州市环境监测中心站

2008年广州市环境监测中心站成为了国家灰霾监测试点单位之一,并建立了灰霾监测试点实验室。灰霾的形成与细颗粒物PM2.5浓度有密切关系。实验室配置了美国赛默飞世尔公司新推出的1405-D双通道环境颗粒物监测仪对细颗粒物PM2.5和可吸入... 详细信息

2008年广州市环境监测中心站成为了国家灰霾监测试点单位之一,并建立了灰霾监测试点实验室。灰霾的形成与细颗粒物PM2.5浓度有密切关系。实验室配置了美国赛默飞世尔公司新推出的1405-D双通道环境颗粒物监测仪对细颗粒物PM2.5和可吸入颗粒物PM10进行监测。本文着重介绍1405-D的安装、维护中容易出现的问题,并提出了一些维护经验和使用注意事项。希望为环境监测人员提供仪器安装和维护方面的参考,获得准确监测数据。经较长时间的使用维护,目前广州灰霾监测试点1405-D双通道环境颗粒物监测仪运行稳定。

关键词：灰霾监测颗粒物监测仪安装维护

2021年一次春季北方沙尘过程对广州空气质量的影响

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环境科学学报 2023年第1期43卷 247-254页

作者：雷蕾张金谱裴成磊陈彦宁常鸣邱晓暖广东省广州生态环境监测中心站广州510006 暨南大学环境与气候研究院广州511443

2021年3月,中国北方地区发生了大范围的沙尘天气,广州出现了连续3 d都以PM_(10)为首要污染物的罕见现象.为进一步加深关于北方粗粒子气溶胶传输对广州市空气质量影响的理解,本文利用广东省广州生态环境监测中心站的污染物与气象监测数据... 详细信息

2021年3月,中国北方地区发生了大范围的沙尘天气,广州出现了连续3 d都以PM_(10)为首要污染物的罕见现象.为进一步加深关于北方粗粒子气溶胶传输对广州市空气质量影响的理解,本文利用广东省广州生态环境监测中心站的污染物与气象监测数据,结合富集因子法、特征雷达图和后向轨迹法分析了沙尘影响前后广州市大气污染特征的转变.结果表明:沙尘影响期间,(1)粗细粒子浓度比(PM_(2.5)/PM_(10))呈明显下降趋势,从沙尘影响前的0.59降低至0.27,广州市的污染特征由标准型、偏钢铁型转变为偏扬尘型;(2)大气颗粒物中Si、Fe、Ca、Pb、Al、Cu、K浓度显著升高,增幅超过50%,这7种元素的富集因子也显著升高,说明其污染源主要来自于粗颗粒气溶胶的长距离输送;(3)大气颗粒物中Zn和Mn浓度增长不明显,增幅均低于50%,V、Cr、Ni、As的浓度有所降低,这6种元素的富集因子也有所降低,说明其污染源主要来自于广州本地;(4)广州本次污染特征的转变受到源于蒙古国、中国内蒙古西部及南疆盆地的粗离子气溶胶远距离输送和本地生成的共同影响,反映了在大气颗粒物污染不断改善的新形势下,仍需关注北方沙尘对广州市空气质量的影响.本研究为广州市环境污染精细化治理与预警预报提供了理论依据.

关键词：浮尘可吸入颗粒物(PM_(10)) 细颗粒物(PM_(2.5)) 广州空气质量

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广州市冬季一次典型臭氧污染过程分析

环境科学 2022年第10期43卷 4305-4315页

作者：裴成磊谢雨彤陈希张涛邱晓暖王瑜王在华李梅中国科学院广州地球化学研究所有机地球化学国家重点实验室广东省环境资源利用与保护重点实验室广州510640 中国科学院深地科学卓越创新中心广州510640 中国科学院大学北京100049 广东省广州生态环境监测中心站广州510060 暨南大学质谱仪器与大气环境研究所广东省大气污染在线源解析系统工程技术研究中心广州510632 粤港澳环境质量协同创新联合实验室广州510632 广州禾信仪器股份有限公司广州510530 广东省生态环境监测中心广州510308 暨南大学环境与气候研究院广州510632 广东省科学院资源利用与稀土开发研究所广州510650

为探究广州市2020年冬季(1月)一次臭氧污染过程,分析了气象条件对臭氧污染产生的影响;运用臭氧生成潜势(OFP)和正交矩阵因子分解法(PMF)分析了影响臭氧的主要挥发性有机物(VOCs)物种和来源;通过经验动力学建模方法(EKMA)识别了臭氧生成... 详细信息

为探究广州市2020年冬季(1月)一次臭氧污染过程,分析了气象条件对臭氧污染产生的影响;运用臭氧生成潜势(OFP)和正交矩阵因子分解法(PMF)分析了影响臭氧的主要挥发性有机物(VOCs)物种和来源;通过经验动力学建模方法(EKMA)识别了臭氧生成控制区,并提出了相应的前体物减排策略.结果表明,本次臭氧污染过程中同时出现了NO_(2)超标,并且PM_(10)和PM_(2.5)浓度也处于高位,体现出和夏、秋季不同的大气复合污染特征;夜间边界层高度低(<75 m)和大气稳定度高加剧了臭氧前体物和颗粒物的累积,日间温度升高约5℃、太阳辐射增强约10%和水平风速小(<1 m·s^(-1))等气象条件加剧了光化学反应,促进了臭氧和颗粒物的生成.冬季VOCs组分以烷烃为主(占比为68.2%),且烷烃和炔烃占比较其他季节更高,但芳香烃(二甲苯和甲苯)和丙烯是臭氧生成的关键VOCs物种;源解析结果显示,VOCs的主要来源为汽车尾气(22.4%)、溶剂使用(20.5%)和工业排放(17.9%),其中溶剂使用的OFP最高;臭氧本地生成主要受VOCs控制,前体物VOCs和NO_(x)按比例3∶1进行削减较为合理.研究探索了冬季臭氧污染的成因,为开展重污染季节O_(3)和PM_(2.5)协同控制提供科学支撑.

关键词：臭氧(O3) 挥发性有机物(VOCs) 广州污染过程正交矩阵因子分解法(PMF)