Three-Dimensional Dynamic Monitoring of Indoor PM2.5with 3D I-Lidar

He，Xin1; Zheng，Shuxiu1; Zhang，Heng1; Jiao，Xiaoqiao1,2; Cheng，Hefa1; Shen，Guofeng1; Tao，Shu1,2

2022

10.1021/acs.estlett.2c00257

Environmental Science & Technology Letters   影响因子和分区

2328-8930

2328-8930

Because people spend most of their time indoors, it is of particular interest to characterize the sources and spatiotemporal variations in PM2.5 in indoor air. While indoor PM2.5 concentrations are often measured at fixed heights, a side-scatter I-Lidar device was recently developed to profile PM2.5 concentrations by recording light intensities scattered from a laser beam. Here, we expand the idea to dynamically monitor the three-dimensional variation in PM2.5 in indoor air by using an array of I-Lidar devices (3D I-Lidar). The 3D I-Lidar was calibrated against transmittances along the laser beam and from the beam to camera, scattering angle, and field-measured PM2.5 concentrations. The calibration can be simplified using an integrated equation to empirically address the influences of major parameters. The instrument was tested in two case studies to three-dimensionally and dynamically quantify the emission and dispersion of PM2.5 from cigarette smoking and incense burning. The highly resolved spatiotemporal variations in PM2.5 concentrations from the two sources can be well portrayed. Finally, the potential and limitations of 3D I-Lidar are discussed.

3D I-Lidar calibrations indoor pollution PM2.5concentrations spatiotemporal variations

SCI ; EI

英语

通讯

Chinese Academy of Sciences[XDA23010100] ; National Natural Science Foundation of China[41821005,41991312,41830641,41922057] ; 111 Program[B14001]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000811938900001

AMER CHEMICAL SOC

20222312192258

Optical radar

Radar Systems and Equipment:716.2 ; Optical Devices and Systems:741.3 ; Laser Beam Interactions:744.8

2-s2.0-85131190765

Scopus

1.College of Urban and Environmental Sciences,Laboratory for Earth Surface Processes,Sino-French Institute for Earth System Science,Peking University,Beijing,100871,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

He，Xin,Zheng，Shuxiu,Zhang，Heng,et al. Three-Dimensional Dynamic Monitoring of Indoor PM2.5with 3D I-Lidar[J]. Environmental Science & Technology Letters,2022,9(6):533-537.

He，Xin.,Zheng，Shuxiu.,Zhang，Heng.,Jiao，Xiaoqiao.,Cheng，Hefa.,...&Tao，Shu.(2022).Three-Dimensional Dynamic Monitoring of Indoor PM2.5with 3D I-Lidar.Environmental Science & Technology Letters,9(6),533-537.

He，Xin,et al."Three-Dimensional Dynamic Monitoring of Indoor PM2.5with 3D I-Lidar".Environmental Science & Technology Letters 9.6(2022):533-537.