阜新市PM_(2.5)污染特征及影响因素分析  

Pollution characteristics and influencing factors of PM_(2.5) in Fuxin City

作　　者：李贺[1] 王道涵[1] LI He;WANG Daohan(Liaoning Technical University Environmental Engineering and Science, Fuxin 123000, China)

机构地区：[1]辽宁工程技术大学环境科学与工程学院,阜新123000

出　　处：《生态科学》2017年第1期201-208,共8页Ecological Science

摘　　要：运用阜新市2014年PM_(2.5)质量浓度和气象数据,经过整理分析及量化计算,得到阜新市的PM_(2.5)污染时空分布特征及影响因素。结果表明,阜新市PM_(2.5)污染在时间序列上呈季节性变化,冬季均值最高为76.4μg·m^(–3),夏季最低为41.8μg·m^(–3),春季和秋季分别为53.6μg·m^(–3)和52.9μg·m^(–3),一天中9点、20点为PM_(2.5)浓度值高峰时段。空间上,阜新市自东向西PM_(2.5)污染逐渐加重,但位于主城区的"长青街"点位附近PM_(2.5)质量浓度值均较高;通过多因素相关分析可知PM_(2.5)污染分布及变化趋势是污染源排放及气象因素共同作用的结果,在影响PM_(2.5)质量浓度的气象因素中,相对湿度和气压与PM_(2.5)质量浓度正相关,气温、风速和降水与PM_(2.5)质量浓度负相关。偏相关分析结果显示除气压外,各气象要素间相互影响,因此可通过建立气象要素与PM_(2.5)质量浓度估算模型在低浓度区估算PM_(2.5)质量浓度。The temporal and spatial distributions of PM2.5and influencing factors were investigated based on the data of PM2.5concentration and meteorological factors of Fuxin City in2014.Result showed that PM2.5concentration had seasonalcharacteristics in time series,with the highest concentration76.4μg·m–3in winter,lowest concentration41.8μg·m–3in summer.The concentration in spring and autumn was53.6μg·m-3and52.9μg·m–3.The highest concentration of PM2.5appeared at9:00and20:00in whole day.In space,PM2.5concentration gradually increased from east to west in Fuxin City,but the“EvergreenStreet”had a high concentration continuously.Pollutants emission and meteorological factors were major results of the changeof PM2.5concentration by multivariate analysis.Among all influencing factors,PM2.5had a positive correlation with relativehumility and air pressure,and a negative correlation with temperature,wind speed and rainfall.The partial correlation analysisresults showed that all meteorological factors had some interaction except pressure,so PM2.5in low concentration could beobtained by establishing an estimation model with meteorology.

关 键 词：PM2.5 污染特征 影响因素 相关分析 

分 类 号：X513[环境科学与工程—环境工程]