福建九仙山自然保护区云雾水、雨水的酸度分析

Acidity analysis of both the cloud-fog water and rainwater of Jiuxian Mountain nature reserve in Fujian Province

本文利用2003年在福建九仙山收集的云雾水和雨水酸度监测资料,对云雾水和雨水酸度的时空分布特征和化学组分进行分析,结果表明:2003年福建九仙山云雾水和雨水严重酸化,云雾水出现强酸的机会比雨水高出近一倍;云雾水、雨水的酸度和酸雨出现率随季节而变化;西风影响时云雾水的酸度最大,北风时雨水为酸性,东南风时出现强酸雨的机会最多;云雾水和雨水受海洋因素影响明显,阴离子以C l-、阳离子以NH+4为主,云雾水的致酸离子与碱性离子比值明显大于雨水.

Based on the acidity monitoring data of cloud-fog water and rainwater observed in Jiuxian Mountain of Fujian Province in 2003, the temporal and spatial distribution characteristics and chemical components of the acidity of cloud-fog water and rainwater were analyzed. The results indicated that, in the year of 2003, both the cloud-fog water and rainwater of Jiuxian Mountain became seriously acidic, and the probability of strong acidity for cloud-fog water was nearly twice as much as that of rainwater. The precipitation acidity and acid rain frequency varied with seasons. Under the influence of the west wind, the cloud-fog water was of the highest acidity, while by the north wind, the rainwater was acidic, and by the southeast wind, the opportunity for the occurrence of strong acid rain was highest. The cloud-fog water and rainwater were remarkably influenced by ocean factors, of which the principal anion was Cl^- and the dominant cation was NH4. The ratio of acid-causing ions to alkaline ions in cloud-fog water was distinctly higher than that in rainwater.