碘化银地面发生器增雪水中Ag^+与化学组分研究

Analysis of Ag^+ and Chemistry Components in Snow Water Catalyzed by Ground AgI Generator

为搞清实施人工影响天气后,所用碘化银催化剂是否对环境造成污染这一问题,利用2002年12月至2003年3月在北京尖子山,使用碘化银地面发生器在人工增雨雪试验中,对4次人工降雪过程所采集雪水样品进行了Ag+测定及其他化学组分分析。发现雪水中Ag+浓度在不同天气过程中变化明显,变化与催化剂数量间没有直接线性关系,所测的Ag+浓度远低于我国生活饮用水标准。雪水化学特征明显,雪水中阴离子浓度最高是SO42-、NO3-,阳离子Ca2+、NH4+浓度最高。与污染较重的雾水相比,雪水中的诸离子浓度远低于北京地区雾水所测值。

In order to explore whether AgI will pollute the environment after seeding, snow water sample data were collected in the snow enhancement experiment by using a ground AgI generator from December 2002 to March 2003 at Jianzishan Mountain of Beijing. Ag^＋ concentration and other chemistry components in the snow water are analyzed. The results show that Ag^＋ concentration varied obviously under different weather patterns. There is no direct linear relation between Ag^＋ concentration change and catalyst amount. The Ag^＋ concentration in the snow is far below the drinking water standards of China. There are obvious chemical characteristics in the snow water： the concentrations of SO4^2- and NO3^- are the highest in the anions, and the concentrations of Ca2^＋ and NH4^＋ are the highest in the cations. The total ion concentration in the snow water is much lower than that of the heavily polluted fog water observed in the Beijing area.