河南省大气降水变化特征和化学组分分析

Variation Characteristics and Chemical Composition Analysis of Atmospheric Precipitation in Henan province

为了解河南省大气降水变化特征和化学组分,对2015-2016年河南省18个城市监测站的资料进行统计分析,结果表明:2016年河南省降水酸度在5.60~9.43之间,平均为6.67,全省未见酸雨;环郑州带城市pH值高于周边城市;2015、2016年全省各城市降水酸度值年度变化不明显;河南省降水中SO_4^(2-)是降水致酸的主要因素,河南省降水主要受硫化物污染。Ca^(2+)、NH_4^+、Mg^(2+)是河南省降水中主要的阳离子,是降水中的主要中和组分。

In order to understand the variation characteristics and chemical components of atmospheric precipitation in Henan province,the data of18urban monitoring stations in Henan province from2015to2016are analyzed statistically.The results show that the acidity of precipitation in Henan province is between5.60and9.43in2016,the average is6.67,and acid rain is not found in the whole province.The pH value of the city of Zhengzhou is higher than that of the surrounding city.The annual change of precipitation acidity value in all cities of the province in2015and2016is not obvious;The SO42-in precipitation of Henan province is the main factor of precipitation acid,and the precipitation in Henan province is mainly polluted by sulfide.Ca2+,NH4+and Mg2+are the main cations in precipitation in Henan province,and are the main neutralizing components in precipitation.