空气污染现状及咸阳市大气中SO2浓度变化研究

目的研究空气污染所造成严重健康问题以及咸阳市2014-2017年大气中SO_2浓度变化,并对其进行统计分析,为咸阳市能源结构调整和大气污染控制提供参考。方法以全球环境污染对健康影响的最新成果以及历史上SO_2烟雾事件为背景,结合咸阳市2014-2017年大气中SO_2浓度变化,利用Origin9.0软件进行统计分析,总结其变化规律。结果全世界每6个过早死亡者当中就有一个是因为环境污染而导致的,仅2015年约有900万人因为暴露于毒素而导致疾病致死,因为污染年度损失花费约4.6万亿美元,约占全球经济产出的6.2%。咸阳市大气中SO_2浓度变化,每年度的采暖期(11月中旬到来年3月中旬)SO_2浓度要比其它时间段更高一些;2014-2017年9月之间,年度SO_2浓度平均值有逐年下降之势,而且平均值之间存在极其显著性差异(P0.01);SO_2浓度变化与NO_2及CO浓度变化呈现出正线性相关,而与O_3浓度变化呈现出负线性相关。结论面对全球环境污染发展严重之势,咸阳市大气中SO_2浓度变化呈现出逐年下降的发展态势,与咸阳市进行能源结构调整、控制燃煤消费量等环境保护措施有直接关系。但是,同时也应该注意对于其它大气污染物(PM_(2.5),PM_(10),NO_2,CO,O_3)浓度变化的研究,为保护环境、控制污染提供更为全面的参考依据。

Status of air pollution and SO2concentration changes of the urban air in Xianyang City

Purposes—To provide reference for the energy structure adjustment and air pollution control in Xianyang City through the study and statistical analysis of the serious health problems caused by the air pollution and the variation of atmospheric SO2concentration in Xianyang City , Shaanxi ,China from 2014 to 2017 .Methods—With the latest results of global environmental pollution on health and SO2smog events as the background ,Origin 9 .0 software was used to summarize and an-alyze statistically the variation rule of SO2concentration in combination with the concentration change of SO2in atmosphere from 2014 to 2017 in Xianyang City .Results—One out of every 6 premature deaths in the world is caused by environmental pollution ,about 9 million people died from exposure to toxins in 2015 .In addition ,annual loss due to pollution is about ＄ 4 .6 trillion ,w hich accounts for 6 .2 percent of global economic output .The concentration of SO2in atmosphere is higher in the heat-ing period (from mid -November to mid -March of next year) than the other time annually .From 2014 to September 2017 ,annual average SO2concentration declined year by year ,and extremely sig-nificant difference between the mean values existed ( P ＜ 0 .01) .Beyond that ,the concentration change of SO2showed a positive linear correlation with the concentration change of NO2and CO ,but a negatively linear correlated with the concentration of O3was observed .Conclusion—Although global environmental pollution is become more and more serious ,the annual average SO2concentration de-clines year by year in Xianyang City ,w hich is attributable to some environmental protection measures that have been carry out ,such as the control of coal consumption and the adjustment of energy struc-ture .However ,more attention should be given to the concentration change of other air pollutants like PM2 .5,PM10,NO2,CO and O3,w hich can provide a more comprehensive reference basis to environ-mental protection and pollution control .