气候变化领域集成服务门户(CCPortal): A novel semi-automatic method for measuring acidic ultrafine particles in the atmosphere

CCPortal

DOI	10.1016/j.atmosenv.2020.118044
	A novel semi-automatic method for measuring acidic ultrafine particles in the atmosphere
	Lu H.; Lyu X.; Guo H.
发表日期	2021
ISSN	1352-2310
卷号	245
英文摘要	The adverse effects of acidic ultrafine particles (AUFPs) have been widely recognized in scientific communities. Two methods have previously been developed to measure AUFPs, but there are certain drawbacks. Thus, the aim of the study was to develop an easier, more rapid and more accurate measurement system for semi-automatic measurement of AUFPs in the atmosphere. The new measurement system was developed by integrating a diffusion sampler (DS) with three quartz crystal microbalances (QCM), namely QCM + DS system. The QCM detectors were coated with a nano-film of metal (metal-QCM detectors) and then placed inside the DS at three sampling spots for collection and detection of ultrafine particles (UFPs). The frequency changes obtained from the metal-QCM detectors were converted into the weights of deposited particles and used to determine the proportions of AUFPs in UFPs through the removal process of non-AUFP particles. Prior to sampling, the sensitive response of the QCM system and collection efficiencies of the QCM + DS system were calibrated using standard acidic and non-acidic particles. Reactions between the AUFPs and nano-film of metal were guaranteed by confirming much lower than one-layer deposition of particles on the detectors based on theoretical calculation and experimental results. Finally, the QCM + DS system was validated in a field measurement by comparing the results with those obtained from the previously developed method and a commercial measurement system (i.e. SMPS). All the three methods showed good agreements in measuring AUFPs and UFPs concentrations, indicating the reliability of the QCM + DS system for the quantification of ambient UFPs and AUFPs. © 2020 Elsevier Ltd
关键词	Acidic ultrafine particles (AUFPs)Nano-film of metal QCM+DS Semi-automatic
语种	英语
scopus关键词	Metals; Accurate measurement; Collection efficiency; Diffusion samplers; Measurement system; Scientific community; Semiautomatic methods; Theoretical calculations; Ultrafine particle; Quartz crystal microbalances; nanofilm; sodium chloride; sulfuric acid; experimental study; methodology; particulate matter; pollutant removal; sampler; acidity; ambient air; Article; atmosphere; automation; calibration; controlled study; diffusion; flow rate; measurement accuracy; particle size; priority journal; quartz crystal microbalance; theoretical model; ultrafine particulate matter
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248752
作者单位	Air Quality Studies, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong
推荐引用方式 GB/T 7714	Lu H.,Lyu X.,Guo H.. A novel semi-automatic method for measuring acidic ultrafine particles in the atmosphere[J],2021,245.
APA	Lu H.,Lyu X.,&Guo H..(2021).A novel semi-automatic method for measuring acidic ultrafine particles in the atmosphere.ATMOSPHERIC ENVIRONMENT,245.
MLA	Lu H.,et al."A novel semi-automatic method for measuring acidic ultrafine particles in the atmosphere".ATMOSPHERIC ENVIRONMENT 245(2021).