柳州大气中硫酸雾的测定和大气中不同价态的硫对降水总硫及酸度的贡献

大气中含硫化合物进入降水有三种途径:①自身起凝结核作用形成云雾水;②降水对云下二氧化硫的冲刷;③降水对云下硫酸雾、硫酸盐气溶胶的冲刷。云下硫酸雾、硫酸盐、二氧化硫是大气中硫的三种含量高而且稳定存在的化学状态,在柳州地区它们对降水酸度贡献的估算值分别为52.4%、3,6%、18.7%,对降水中总硫的贡献分别为10.2%、15.1%、14.9%。柳州地区云雾水对降水总硫的贡献约30%左右。 

Measurement of Suifuric Acid Fog in the Atmosphere of Liuzhow City and the Contribution of Different Valent Sulfur to the Total Sulfur Content and Acidity of Precipitation

There are three ways for sulfur compounds in the atmosphere to enter into the precipitation: ( 1 ) the formation of cloud-fog water with itself as condensation nucleus; ( 2 ) the brushing of sulfur dioxide under the cloud by the precipitation and ( 3 ) the brushing of sulfuric acid fog and sulfate aerosd under the cloud by the precipitation.The contents of these three sulfur compounds under the cloud are high and stable in chemical state, and their contribution to the acidity of precipitation in Liuzbow area are: sulfuric acid 52.4%, sulfate 3.6% and sulfur dioxide 18,7%; and contribution to the total sulfur content are 40.2%, 15.1% and 14.9% respectively .The contribution of cloud-fog water to the total sulfur content in Liuzhow area is about 30%.