摘要
本文主要研究颗粒物对酸雨的作用。通过颗粒物与pH4.0的硫酸反应,证明在柳州大气颗粒物可溶钙盐中存在42％碱性钙盐,它可以中和降水中的酸,在pH<5.0时,碱性钙盐中和降水中的酸的作用和OH^-作用一样。由于可溶的颗粒钙盐的清除系数大,降雨初期,清除碱性钙所中和的H^+占降水中H^+的比例最大,随着降水时间的延长,颗粒物的中和作用逐渐下降。总的看来,碱性钙盐可中和23％的H^+。和柳州相比,北京颗粒物的中和能力是柳州颗粒物的3倍。
This paper mainly deals with the effect of atmospheric particulate on acid rain.It is a part of the research on acidic precipitation in Liuzhou city. Experimental results show that 42% of soluble calcium salt can neutralize H+ of acid rain. Owing to coarse particle are readily washed out, the pH of samples collected at beginning of rain is higher than that of the other samples. In general, soluble basic calcium salt can neutralize 23% of H+ of acid rain. Neutralization capacity of particulate in Beijing is three times larger than that in Liuzhou city.
出处
《环境化学》
CAS
CSCD
北大核心
1991年第1期14-25,共12页
Environmental Chemistry
