Title of Paper:大连市大气污染特征、影响因素及来源分析

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Date of Publication:2022-06-29

Journal:Environment Engineering

Volume:36

Issue:6

Page Number:104-109

ISSN No.:1000-8942

Key Words:"PM_(2. 5); PM_(10); SO_2; NO_2; PM_(2. 5); PM_(10); SO_2; NO_2; meteorological factors; pollution source"

CN No.:11-2097/X

Abstract:The atmospheric concentrations,temporal variations,workday and weekend effect,and their influence factors of six air pollutants ( PM_(10),PM_(2. 5),SO_2,NO_2,O_3 and CO) were studied,based on the continuous observation data in Dalian from 2016 to 2017. The main air pollutants in Dalian were O_3,PM_(10) and PM_(2. 5) . Particulate was the main pollutant in winter,while O_3 was the main pollutant in summer. Concentrations of PM_(10),PM_(2. 5) and SO_2 were significantly affected by the emission from coal combustion in the heating season,and significantly higher than those in the non-heating season. Significant seasonal variations were found for PM,SO_2,NO_2 and O_3 in Dalian,while obvious weekend effect was found for PM_(2. 5),PM_(10),SO_2, and NO_2 with the concentrations higher at weekends than on workdays. We studied the influence of meteorological factors, such as temperature,humidity,and wind speed,on the concentration of contaminants by using correlation analysis. Potential sources of PM_(2. 5) in Dalian were also estimated based on the back trajectory analysis.

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