Effect of relative humidity on the performance of five cost-effective PM sensors

doi:10.1080/02786826.2021.1910136

	Effect of relative humidity on the performance of five cost-effective PM sensors
	Wang, Peng 1; Xu, Feng 1,2; Gui, Huaqiao 3; Wang, Huanqin 1,2; Chen, Da-Ren 1
刊名	AEROSOL SCIENCE AND TECHNOLOGY
	2021-03-30
关键词	Jonathan P Reid
ISSN号	0278-6826
DOI	10.1080/02786826.2021.1910136
通讯作者	Wang, Huanqin(hqwang@iim.ac.cn) ; Chen, Da-Ren(dchen3@vcu.edu)
英文摘要	In this work, the effect of relative humidity, RH, on the readouts of five light-scattering-based PM sensors were investigated by using particles composed of different hydroscopic materials and comparing the readouts with those measured by Tapered Element Oscillating Microbalance (TEOM). It was found the RH has various effects on the readouts of PM sensors, highly depending on the hydroscopic property of particles. Negligible RH effect on the PM sensors' readouts was observed for hydrophobic particles while significant increase in the readouts was observed for hydroscopic particles at the RH setting higher than the deliquescence relative humidity, DRH, of particle materials. For particles in the binary components, the effect of the mixture deliquescence on the sensor readouts depends on the hygroscopicity of composite materials (e.g., NaCl + Glucose; NaCl + OA; NaCl + K2SO4). In the case of NaCl + OA, the water uptake of resultant NaCl + OA particles is less than that of pure NaCl and OA (because of the possible formation of less hygroscopic di-sodium oxalate, Na2C2O4, in particles). The readouts of PM sensors were also influenced by the mixing status of particles, i.e., internally vs. externally mixed. The correlation slopes for different PM sensors were compared. More, the sampling misalignment was found affecting the readouts of some PM sensors. It is thus suggested to calibrate PM sensors using field particles under the application environments for getting PM data in good quality (assuming that the seasonal change of field RH, and the size distribution and composition of field particles is minor). Copyright (c) 2021 American Association for Aerosol Research
资助项目	Chinese Scholarship Council ; Excellent Student International Exchange Funding Program, University of Science and Technology of China
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000640113200001
资助机构	Chinese Scholarship Council ; Excellent Student International Exchange Funding Program, University of Science and Technology of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/121750]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Huanqin; Chen, Da-Ren
作者单位	1.Virginia Commonwealth Univ, Dept Mech & Nucl Engn, Particle Lab, 401 West Main St, Richmond, VA 23284 USA 2.Chinese Acad Sci, Inst Intelligent Machines, State Key Lab Transducer Technol, Hefei, Anhui, Peoples R China 3.Chinese Acad, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Wang, Peng,Xu, Feng,Gui, Huaqiao,et al. Effect of relative humidity on the performance of five cost-effective PM sensors[J]. AEROSOL SCIENCE AND TECHNOLOGY,2021.
APA	Wang, Peng,Xu, Feng,Gui, Huaqiao,Wang, Huanqin,&Chen, Da-Ren.(2021).Effect of relative humidity on the performance of five cost-effective PM sensors.AEROSOL SCIENCE AND TECHNOLOGY.
MLA	Wang, Peng,et al."Effect of relative humidity on the performance of five cost-effective PM sensors".AEROSOL SCIENCE AND TECHNOLOGY (2021).