离石区2010-2019年大气降水化学特性分析

Analysis on Chemical Characteristics of Atmospheric Precipitation in Lishi District from 2010 to 2019

为了解离石区大气降水化学特征。利用离石区2010-2019年的大气降水监测资料,研究分析了离石区近十年来的大气降水量,pH值、电导率、氟化物、氯化物、硝酸盐、亚硝酸盐、铵盐、硫酸盐、钾、钠、钙和镁等变化情况。结果表明:近十年来离石区的大气降水主要集中在5—10月,基本上呈现周期性的波动趋势。离石区大气降水的pH值和电导率相对稳定,没有出现酸雨。主要离子浓度所占比例顺序为:Ca^(2+)>NH4^(+)>SO4^(2-)>Na^(+)>Mg^(2+)>NO_(3)->Cl^(-)>K^(+)>F->NO_(2)-,其中大气降水中阳离子主要是Ca^(2+)、NH4^(+)和Na^(+),阴离子主要为SO4^(2-)和NO3^(-)。

In order to dissociate the chemical characteristics of atmospheric precipitation in Lishi District,based on the monitoring data of atmospheric precipitation in Lishi District from 2010 to 2019,the changes of atmospheric precipitation in Lishi Distric,pH value,conductivity,fluoride,chloride,nitrate,nitrite,ammonium salt,sulfate,potassium,sodium,calcium and magnesium in recent ten years were studied and analyzed.The results show that:in recent ten years,the atmospheric precipitation in Lishi Distric mainly concentrated in May to October,basically showing a cyclical trend.The pH value and conductivity of precipitation in Lishi Distric are relatively stable,and there is no acid rain.The order of main ion concentration is:Ca^(2+)>NH4^(+)>SO4^(2-)>Na^(+)>Mg^(2+)>NO_(3)->Cl^(-)>K^(+)>F->NO_(2)-,The cations in the precipitation are mainly Ca^(2+)、NH4+and Na^(+),and the anions are mainly SO_(4)^(2-)and NO_(3)-.