« Previous Abstract"Quantification of 4-hydroxy-2,5-dimethyl-3-furanone in fruit samples using solid phase microextraction coupled with gas chromatography-mass spectrometry"    Next AbstractSingle Silver Adatoms on Nanostructured Manganese Oxide Surfaces: Boosting Oxygen Activation for Benzene Abatement »

J Environ Sci (China)

Title:		Simulated reaction of formaldehyde and ambient atmospheric particulate matter using a chamber
Author(s):		Chen Y; Liu J; Shang J; Zhu T;
Address:		"College of Environmental Science and Engineering, Peking University, Beijing 100081, China. College of Environmental Science and Engineering, Peking University, Beijing 100081, China. Electronic address: shangjing@pku.edu.cn"
Journal Title:		J Environ Sci (China)
Year:		2017
Volume:		20161003
Issue:
Page Number:		45 - 51
DOI:		10.1016/j.jes.2016.08.018
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"The reaction of HCHO with Beijing winter's real ambient particulate matter (PM) inside a 3.3m(3) Teflon Chamber was conducted in this study. NO(2), O(3) and H(2)O gases were removed from the ambient aerosol before entering into the chamber. The decays of HCHO were monitored (acetylacetone spectrophotometry method) during the reactions at different PM number concentrations (N(a)) and relative humidities (RHs), and the formed particulate formate was detected by IC and XPS techniques. The results showed that when RH was 10%-15%, the decay rate of HCHO in the chamber was higher with the existence of PM from relatively clean days (with number concentration (N(a))<200,000particle/L, 0.35-22.5mum) compared to dirty days (N(a)>200,000particle/L, 0.35-22.5mum). When RH increased to 30%-45%, PM can hardly have significant influences on the decay of HCHO. The formations of formate on the reacted PM were consistent with the HCHO decay rates at different ambient PM N(a) and RH conditions. This is a first study related to the 'real' ambient PM reacted with HCHO and suggested that in the clean and low RH days, PM could be an effective medium for the conversion of HCHO to formate"
Keywords:		Air Pollutants/*analysis Atmosphere/*chemistry Beijing Environmental Monitoring/*instrumentation Formaldehyde/*analysis Particulate Matter/*analysis Chamber Formaldehyde Formate Particulate matter Volatile organic compounds;
Notes:		"MedlineChen, Yueyue Liu, Jia Shang, Jing Zhu, Tong eng Netherlands 2017/06/03 J Environ Sci (China). 2017 Jun; 56:45-51. doi: 10.1016/j.jes.2016.08.018. Epub 2016 Oct 3"