以“奎屯—独山子—乌苏”区域重点城市奎屯为研究区域,利用2013—2015年O3、VOCs、NOx监测数据,探讨奎屯市大气O3与VOCs、NOx之间的关系。结果显示:2013—2015年依次出现33 d、14 d、10 d O3超标现象,最大日均值分别为0.457 mg·m-3、0.396 mg·m-3、0.385 mg·m-3,夏季O3污染较重,冬季和夏季O3浓度值相差近2.5倍;O3浓度日间变化呈现倒“U”形分布,峰值出现在17:00左右;冬季和夏季VOCs浓度相差近3倍,VOCs小时值没有较明显的日变化规律,冬季VOCs浓度最高而O3浓度最低,两者反向作用不明显,但NOx浓度与O3呈现对称的反向作用,说明冬季奎屯市O3的生成处于NOx敏感区而非VOCs敏感区;夏季VOCs与NOx变化趋势基本相同,O3浓度水平处于高位,两者呈现对称的反向作用,说明夏季奎屯市O3的生成同时处于VOCs和NOx敏感区,O3生成受VOCs及NOx的交替控制。
郭宇宏
,
朱俏俏
,
杨春
,
王海林
,
张小啸
,
刘文江
,
杨荣江
,
田青
. 奎屯市大气环境中O3与VOCs、NOx的关系[J]. 干旱区研究, 2019
, 36(3)
: 734
-742
.
DOI: 10.13866/j.azr.2019.03.25
In this paper,the relationships among O3,VOCs and NOx concentrations over Kuytun City,Xinjiang,northwest China during the period of 2013-2015 were analyzed using the environmental monitoring data.Results showed that an apparent overload of O3 concentration occurred over Kuytun City.O3 concentration over the city was overloaded for 33,14 and 10 days during the period of 2013-2015,and the daily maximum concentrations of O3 were 0.457,0.396 and 0.385 mg·m-3,respectively.The heavy pollution of O3 occurred in summer,and the value of O3 concentration was 2.5 times higher than that in winter.The curve of diurnal variation of O3 pollution was reversely “U-shaped”,and the peak value occurred around 17:00 o’clock.The concentration of VOCs in summer was 3 times higher than that in winter,and there was no significant diurnal variation.It was observed that the high concentration of VOCs and low concentration of O3 occurred in winter.In summer,VOCs concentration changed with NOx accordingly,and O3 concentration was the highest.This study indicated that the O3 pollution occurred mainly in the sensitive areas of VOCs and NOx,and controlled alternatively by VOCs and NOx.
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