2010-2018年西安市大气污染物变化特征分析  

Characteristics of variations of atmospheric pollutants over Xi’an during 2010-2018

作　　者：王叶琳 程燕[1] 严璐 刘舒婷 严梦园 WANG Yelin;CHENG Yan;YAN Lu;LIU Shuting;YAN Mengyuan(School of Human Settlements and Civil Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学人居环境与建筑工程学院,西安710049

出　　处：《地球环境学报》2020年第1期99-111,共13页Journal of Earth Environment

基　　金：国家自然科学基金项目(41877308)。

摘　　要：日益严重的大气污染问题不仅对西安市的城市形象,还对人们的身体健康造成危害。对西安市13个国控环境空气质量自动监测站6类污染物的数据进行时空变化特征分析,对各污染物的相关性进行分析,并探讨大气污染原因,结果表明:2010-2018年SO2浓度显著降低,PM10和NO2年均浓度总体并未呈现下降趋势,2013-2018年PM2.5浓度变化趋势与PM10浓度变化趋势相同,二者污染情况均较严重,CO浓度呈减小趋势,2013-2016年O3的污染状况有恶化趋势;第二、三产业增加值的大幅上升所反映的工业、旅游业、交通运输、餐饮业的大规模发展,对西安空气质量有较大影响;SO2的工业减排对大气SO2浓度水平下降效果明显,但NOx和烟(粉)尘排放量的下降却没有反映在大气NO2和颗粒物浓度下降上。说明大气NO2来源除了工业来源外,还有其他重要来源(如:机动车排放、天然气燃烧产物),同时也反映了大气颗粒物来源的复杂,单纯依靠降低烟(粉)尘排放量无法有效降低颗粒物浓度。高增速的机动车保有量和能源消费结构均对西安市大气污染问题有重要影响。Background,aim,and scope With the development of economy,the problem of air pollution is becoming more and more acute.Because of its special terrain and more anthropogenic emission activities,Xi’an has become one of the most polluted cities,seriously affecting its tourism development and the image of an international metropolis.In addition,air pollution also causes harm to people’s health.The goals of this study are(1)to investigate the variation of atmospheric pollutants;(2)to analyse of the correlation of various pollutants;(3)to identify the causes of air pollution.This work provides reference for air pollution prevention and control in Xi’an.Materials and methods The concentration of atmospheric pollutants in Xi’an were monitored at 13 monitoring stations,from January 1,2010 to December 31,2018.We discussed the temporal and spatial variation of atmospheric pollutants,and made correlation analysis of various pollutants.Results The annual concentration of SO2 decreased significantly during 2010-2018,but the annual concentration of PM10 and NO2 did not show a downward trend.The change trend of PM2.5 annual concentration during 2013-2018 was the same as that of PM10.The pollution situation of PM2.5 and PM10 were both serious,the CO annual concentration showed a downward trend,and the pollution situation of O3 from 2013 to 2016 showed a deteriorating trend.Discussion The annual change of pollutant concentration is related to a series of"pollution control and haze reduction"work in Xi’an.The reduction of SO2 concentration is related to the work of"coal-fired boiler disassembly"since 2013.However,the problem of NO2 pollution has not improved because the promotion of"coal to gas"work effectively reduces SO2 concentration,while the combustion of natural gas produces more nitrogen oxides.The decrease of CO concentration reflects that the promotion of clean energy for automobiles and public transport in Xi’an has been more effective in recent years.The deterioration of ozone pollution is mainly related to th

关 键 词：大气污染物 时空分布 污染原因分析 

分 类 号：X51[环境科学与工程—环境工程]