Study on sulfate and sulfur oxidation ratio in PM10 during heating season in Beijing
采暖季北京大气PM10中硫酸盐与硫氧化率的观测研究;

Sulfate is a major component of PM_(10) in atmosphere and its concentration is affected by many factors.In this article,sulfate concentration and sulfur oxidation ratio in heating season were measured with on-line systems,and the relationships between sulfur oxidation ratio and influencing factors were discussed.The results showed that the most abundant component of PM_(10) was sulfate and there was a significant correlation between sulfate and SO_2 during heating season in Beijing.Coal burning was still the primary pollution source in heating season. During non-pollution period,SO_4~(2-) was mainly from aged air mass with high sulfur oxidation ratio which was promoted by O_3 during long range transportation.During pollution period,SO_4~(2-) was mainly from original source with lower sulfur oxidation ratio which had no obvious correlation with O_3.Except wind speed,there were no significant correlations bwteen meterological facotrs and sulfate and between meteorological factors and sulfur oxidation ratio during observation.