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Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China

Guangzhou is the central city in the Pearl River Delta (PRD), China, and is one of the most polluted cities in the world. To characterize the ambient falling dust pollution, two typical sampling sites: urban (Wushan) and suburban (University Town) areas in Guangzhou city were chosen for falling dust...

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Autores principales: Zhao, Jinping, Peng, Ping’an, Song, Jianzhong, Ma, Shexia, Sheng, Guoying, Fu, Jiamo
Formato: Texto
Lenguaje:English
Publicado: Springer Netherlands 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2914287/
https://www.ncbi.nlm.nih.gov/pubmed/20700381
http://dx.doi.org/10.1007/s11869-009-0062-y
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author Zhao, Jinping
Peng, Ping’an
Song, Jianzhong
Ma, Shexia
Sheng, Guoying
Fu, Jiamo
author_facet Zhao, Jinping
Peng, Ping’an
Song, Jianzhong
Ma, Shexia
Sheng, Guoying
Fu, Jiamo
author_sort Zhao, Jinping
collection PubMed
description Guangzhou is the central city in the Pearl River Delta (PRD), China, and is one of the most polluted cities in the world. To characterize the ambient falling dust pollution, two typical sampling sites: urban (Wushan) and suburban (University Town) areas in Guangzhou city were chosen for falling dust collection over 1 year at time intervals of 1 or 2 months. The flux of dry deposition was calculated. In addition, mineral composition and morphology of atmospheric falling dust were studied by X-ray diffraction, scanning electron microscopy, and microscopic observation. The results revealed that the dust flux in Guangzhou city was 3.34–3.78 g/(m(2) month) during the study period. The main minerals in the dust were quartz, illite, calcite, kaolinite, gypsum, plagioclase, dolomite, and amorphous matter. The morphological types included grained and flaky individual minerals, chain-like aggregates, spherical flying beads, and irregular aggregates, with the chain-like and spherical aggregates indicators of industrial ash. The major dusts were derived from industrial and construction activities. The gypsum present in the dust collected in winter season was not only derived from cement dust but may also have originated from the reaction of calcic material with sulfuric acids resulting from photooxidation of SO(x) and NO(x), which confirmed serious air pollution due to SO(x) and NO(x) in Guangzhou. The abatement of fossil fuel combustion emissions and construction dust will have a significant beneficial effect on dust reduction.
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spelling pubmed-29142872010-08-09 Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China Zhao, Jinping Peng, Ping’an Song, Jianzhong Ma, Shexia Sheng, Guoying Fu, Jiamo Air Qual Atmos Health Article Guangzhou is the central city in the Pearl River Delta (PRD), China, and is one of the most polluted cities in the world. To characterize the ambient falling dust pollution, two typical sampling sites: urban (Wushan) and suburban (University Town) areas in Guangzhou city were chosen for falling dust collection over 1 year at time intervals of 1 or 2 months. The flux of dry deposition was calculated. In addition, mineral composition and morphology of atmospheric falling dust were studied by X-ray diffraction, scanning electron microscopy, and microscopic observation. The results revealed that the dust flux in Guangzhou city was 3.34–3.78 g/(m(2) month) during the study period. The main minerals in the dust were quartz, illite, calcite, kaolinite, gypsum, plagioclase, dolomite, and amorphous matter. The morphological types included grained and flaky individual minerals, chain-like aggregates, spherical flying beads, and irregular aggregates, with the chain-like and spherical aggregates indicators of industrial ash. The major dusts were derived from industrial and construction activities. The gypsum present in the dust collected in winter season was not only derived from cement dust but may also have originated from the reaction of calcic material with sulfuric acids resulting from photooxidation of SO(x) and NO(x), which confirmed serious air pollution due to SO(x) and NO(x) in Guangzhou. The abatement of fossil fuel combustion emissions and construction dust will have a significant beneficial effect on dust reduction. Springer Netherlands 2010-02-02 2010 /pmc/articles/PMC2914287/ /pubmed/20700381 http://dx.doi.org/10.1007/s11869-009-0062-y Text en © The Author(s) 2010 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Article
Zhao, Jinping
Peng, Ping’an
Song, Jianzhong
Ma, Shexia
Sheng, Guoying
Fu, Jiamo
Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China
title Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China
title_full Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China
title_fullStr Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China
title_full_unstemmed Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China
title_short Research on flux of dry atmospheric falling dust and its characterization in a subtropical city, Guangzhou, South China
title_sort research on flux of dry atmospheric falling dust and its characterization in a subtropical city, guangzhou, south china
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2914287/
https://www.ncbi.nlm.nih.gov/pubmed/20700381
http://dx.doi.org/10.1007/s11869-009-0062-y
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