Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA

Abstract Benzo [a] pyrene (BaP) in the atmosphere possess great carcinogenic potential to human health, and the understanding of its scavenging mechanisms has attracted considerable attention. In this work, a new quantitative method is proposed to make a comparative analysis of the long-term contrib...

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Autores principales:	Chunqiong Liu, Yuanyuan Guo, Kai Shi, Jiao Zhang, Bo Wu, Juan Du
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8bf22d3ab3c942028f23e16ddc4c6bfe
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spelling	oai:doaj.org-article:8bf22d3ab3c942028f23e16ddc4c6bfe2021-12-02T13:20:22ZComparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA10.1038/s41598-021-85224-32045-2322https://doaj.org/article/8bf22d3ab3c942028f23e16ddc4c6bfe2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85224-3https://doaj.org/toc/2045-2322Abstract Benzo [a] pyrene (BaP) in the atmosphere possess great carcinogenic potential to human health, and the understanding of its scavenging mechanisms has attracted considerable attention. In this work, a new quantitative method is proposed to make a comparative analysis of the long-term contributions of wet deposition and photodegradation to BaP removal based on multi-fractal detrended cross-correlation analysis (MFDCCA). According to the precipitation and global solar radiation (GSR) observations from 1998 to 2016 for two urban sites (Central/Western District and TsuenWan) in Hong Kong, the wet deposition and photodegradation of BaP are analyzed. Using MFDCCA method, long-term cross-correlation between precipitation/GSR and BaP are investigated. Moreover, the differences of multifractal features in cross-correlations of precipitation-BaP and GSR-BaP system are analyzed. Strong long-term persistence is observed in the cross-correlations for precipitation-BaP system in a one-year cycle; while cross-correlations between GSR and BaP show weak persistence over the whole timescale. Based on the meteorology in Hong Kong, this difference has been discussed. Then, contributions of wet deposition and photodegradation to atmospheric BaP removal are quantified based on MFDCCA method, which are further compared between summer and winter. The comparative analysis suggests that wet deposition plays a more significant role in the removal of atmospheric BaP. Specifically, in summer, the contributions of wet deposition are twice as much as that of photodegradation for both two sites; while in winter, the contribution of photodegradation is a little higher than that of wet deposition to BaP removal. Meanwhile, for wet deposition, the contributions in summer are about ten times greater than that in winter; while for photodegradation, the difference in contributions between summer and winter are relatively smaller. Furthermore, based on sliding window technique, the temporal evolutions in the contributions of wet deposition/photodegradation to BaP removal have been presented for both two sites. On this basis, it is discovered that the comprehensive contributions of wet deposition and photodegradation peak in June, and reach their lowest levels in December for both two sites. Quantifying the contribution of meteorological factors to the removal of atmospheric BaP is help for understanding its geochemical cycle.Chunqiong LiuYuanyuan GuoKai ShiJiao ZhangBo WuJuan DuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chunqiong Liu Yuanyuan Guo Kai Shi Jiao Zhang Bo Wu Juan Du Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA
description	Abstract Benzo [a] pyrene (BaP) in the atmosphere possess great carcinogenic potential to human health, and the understanding of its scavenging mechanisms has attracted considerable attention. In this work, a new quantitative method is proposed to make a comparative analysis of the long-term contributions of wet deposition and photodegradation to BaP removal based on multi-fractal detrended cross-correlation analysis (MFDCCA). According to the precipitation and global solar radiation (GSR) observations from 1998 to 2016 for two urban sites (Central/Western District and TsuenWan) in Hong Kong, the wet deposition and photodegradation of BaP are analyzed. Using MFDCCA method, long-term cross-correlation between precipitation/GSR and BaP are investigated. Moreover, the differences of multifractal features in cross-correlations of precipitation-BaP and GSR-BaP system are analyzed. Strong long-term persistence is observed in the cross-correlations for precipitation-BaP system in a one-year cycle; while cross-correlations between GSR and BaP show weak persistence over the whole timescale. Based on the meteorology in Hong Kong, this difference has been discussed. Then, contributions of wet deposition and photodegradation to atmospheric BaP removal are quantified based on MFDCCA method, which are further compared between summer and winter. The comparative analysis suggests that wet deposition plays a more significant role in the removal of atmospheric BaP. Specifically, in summer, the contributions of wet deposition are twice as much as that of photodegradation for both two sites; while in winter, the contribution of photodegradation is a little higher than that of wet deposition to BaP removal. Meanwhile, for wet deposition, the contributions in summer are about ten times greater than that in winter; while for photodegradation, the difference in contributions between summer and winter are relatively smaller. Furthermore, based on sliding window technique, the temporal evolutions in the contributions of wet deposition/photodegradation to BaP removal have been presented for both two sites. On this basis, it is discovered that the comprehensive contributions of wet deposition and photodegradation peak in June, and reach their lowest levels in December for both two sites. Quantifying the contribution of meteorological factors to the removal of atmospheric BaP is help for understanding its geochemical cycle.
format	article
author	Chunqiong Liu Yuanyuan Guo Kai Shi Jiao Zhang Bo Wu Juan Du
author_facet	Chunqiong Liu Yuanyuan Guo Kai Shi Jiao Zhang Bo Wu Juan Du
author_sort	Chunqiong Liu
title	Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA
title_short	Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA
title_full	Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA
title_fullStr	Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA
title_full_unstemmed	Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA
title_sort	comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric bap by mfdcca
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8bf22d3ab3c942028f23e16ddc4c6bfe
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Comparative analysis of contributions of wet deposition and photodegradation to the removal of atmospheric BaP by MFDCCA

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