A super sandstorm altered the abundance and composition of airborne bacteria in Beijing  

作　　者：Fanxuan Xia Zhuo Chen Enze Tian Jinhan Mo 

机构地区：[1]Beijing Key Laboratory of Indoor Air Quality Evaluation and Control,Department of Building Science,Tsinghua University,Beijing 100084,China [2]Songshan Lake Materials Laboratory,Dongguan 523808,China [3]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [4]College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China [5]Key Laboratory of Coastal Urban Resilient Infrastructures(Shenzhen University),Ministry of Education,Shenzhen 518060,China [6]Key Laboratory of Eco Planning&Green Building(Tsinghua University),Ministry of Education,Beijing 100084,China

出　　处：《Journal of Environmental Sciences》2024年第10期35-44,共10页环境科学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.52078269).

摘　　要：Sandstorm,which injects generous newly emerging microbes into the atmosphere covering cities,adversely affects the air quality in built environments.However,few studies have examined the change of airborne bacteria during severe sandstorm events.In this work,we analyzed the airborne bacteria during one of the strongest sandstorms in East Asia onMarch 15th,2021,which affected large areas of China and Mongolia.The characteristics of the sandstorm were compared with those of the subsequent clean and haze days.The composition of the bacterial community of air samples was investigated using quantitative polymerase chain reaction(qPCR)and high-throughput sequencing technology.During the sandstorm,the particulate matter(PM)concentration and bacterial richnesswere extremely high(PM_(2.5):207μg/m^(3);PM_(10):1630μg/m^(3);5700 amplicon sequence variants/m^(3)).In addition,the sandstorm brought 10 pathogenic bacterial genera to the atmosphere,posing a grave hazard to human health.As the sandstorm subsided,small bioaerosols(0.65–1.1μm)with a similar bacterial community remained suspended in the atmosphere,bringing possible long-lasting health risks.

关 键 词：Airborne bacteria SANDSTORM BIOAEROSOL HAZE PATHOGEN 

分 类 号：X51[环境科学与工程—环境工程] X172