博乐市大气污染特征及变化趋势研究

Study on the Characteristic and Trend of Atmospheric Environment Pollution in Bole, Xinjiang

随着工业化、城市化进程加快,中国城市的大气质量正面临前所未有的考验。利用2015~2017年博乐市城市空气质量监测数据,以大气污染因子二氧化硫(SO2)、二氧化氮(NO2)、可吸入颗粒物(PM10)、细颗粒物(PM2.5)为研究对象,分析了年、季节及月变化特征;利用Daniel趋势检验Spearman秩相关系数法,分析了博乐市环境空气中的主要污染物变化规律,及大气环境质量变化趋势。结果表明:2015~2017年间,博乐市NO 2和PM 10为首要污染物,呈上升趋势;PM2.5和SO2呈现下降趋势,但下降趋势均不显著。各大气污染物浓度均呈现双峰型,PM2.5、PM10、SO2和NO2年平均质量浓度分别为(29.63±19.7)、(66.9±36.8)、(15.6±9.3)、(17.8±9.13)μg/m^3。4种大气污染物浓度季节变化基本一致,均呈冬季>秋季>春季>夏季的趋势。研究结果可为博乐市大气污染治理提供基础资料。

As industrialization and urbanization accelerated,air pollution has become a major concern with regard to public health and sustainable development in Chinese cities.This paper utilized air quality monitoring data of two monitoring sites in Bole during 2015-2017 to study the air pollution characteristics and tends,including annual changes,seasonal distribution and monthly variation of general urban air pollutants,PM2.5,PM10,SO2,NO2.Meanwhile,the changes in the trend of main pollutants in the air,their environmental impacts,and atmosphere quality variation tendency were quantitatively investigated with Daniel Spearman rank correlation coefficient test.Our results suggest that during the period of 2015-2017,NO2 and PM10 in Bole City were the main pollutants,showing an upward trend,while PM2.5 and SO2 showed a declined trend,and the change trend was not significant.Additionally,the concentrations of analyzed air pollutants are bimodal.The annual concentrations of PM2.5,PM10,SO2,NO2 were(29.63±19.7),(66.9±36.8),(15.6±9.3),(17.8±9.13)μg·m^-3,respectively.Seasonal changes in the concentrations of the four air pollutants are basically consistent,whichare as following:Winter>Autumn>Spring>Summer.The investigation would possibly provide basic information and decision recommendations for atmospheric environment pollution control and prevention of Bole City.