“十五”期间重庆雾水化学特征研究

Chemical Characteristics of Fogwater in Chongqing During the Tenth Five-Year Plan

"十五"期间重庆市区雾水呈酸性,近郊区雾水呈弱酸性,远郊区基本未酸化;由市区向外,雾水的电导率逐步降低,阴离子浓度逐步降低,钙离子、铵根离子和钾离子浓度也逐步降低,但钠离子和镁离子则有所不同;重庆雾水的酸化类型以硫酸型为主,其次是盐酸型和硝酸型.雾水的碱化类型在市区和远郊区以钙—铵型为主,在近郊区以钙型为主.雾水中离子浓度比雨水高出数倍.

This paper reports pollution and chemical characteristics of fogwater in Chongqing in the period of the 10th five-year plan. Fogwater was acidic in the urban area, weakly acidic in the outskirts and neutral in the suburbs. In space, fogwater conductivity, anion concentrations and NH＋ , Ca^2＋ and K＋ dropped steadily from the urban area, to the outskirts and to the suburbs. The distribution of Na^＋ and Mg^2＋ showed a different pattern. The primary type of fogwater acidification was H2 SO4, and the secondary type was HCi and HNO3. The basification types of fogwater were primarily Ca^2＋ and NH^＋ in the urban zone and suburbs, and Ca^2＋ in the outskirts. Ion concentration in the fogwater was several times higher than that in the rainwater.