【摘要】 依据2018年吉安市水文局14个大气降水监测站点的数据,从降水pH值、离子摩尔浓度及随时间变化趋势、离子间相关性、降水污染类型等方面分析了吉安市大气降水化学特性及污染源.分析研究表明:吉安市大气降水中硫污染较氮氧化物的污染更重,降水类型主要为燃煤型或者硫酸型污染.由于Ca2+、NH4+两个主要碱性阳离子对SO42-、NO3-两个主要致酸阴离子有很好的中和作用,其中Ca2+对降水的中和作用更明显,因此SO42-、NO3-两个主要致酸阴离子并未造成酸雨污染,吉安市大气降水类型为碱性降水.通过上述监测数据的分析以期为积极推行河长制,水资源开发利用工作提供技术支撑.更多还原

【Abstract】 According to the data of 14 atmospheric precipitation monitoring stations of Jian hydrology bureau in 2018,the chemical characteristics and pollution sources of atmospheric precipitation in Jian were analyzed from the aspects of precipitation pH value,ion molar concentration and its time variation trend,ion correlation and precipitation pollution type. The analysis shows that sulfur pollution is more serious than nitrogen oxide pollution in the precipitation of Jian city,and the precipitation type is mainly coal burning or sulfuric acid pollution. Since Ca2 + and NH4+have a good neutralization effect on SO42-and NO3-,which are mainly acid-causing anions,and Ca2 + has a more obvious neutralization effect on precipitation,SO42-and NO3-are mainly acid-causing anions and do not cause acid rain pollution. The type of atmospheric precipitation in Jian city is alkaline precipitation. The analysis of the above monitoring data is expected to provide technical support for the active implementation of river length system and the development and utilization of water resources.更多还原