摘要
对唐山市 1 998～ 2 0 0 0年降水进行了考察 ,发现全年 70 %以上的降水 pH值在 5 6以下 ,但整体水平不是太低 ,酸雨多出现在 5、 6、 7月 .经过对酸雨期降水的化学分析和相关系数检查发现 ,Cl- 不作贡献 ,SO2 - 4和NO- 3是形成酸雨的主要酸根离子 ,其比例为 6∶1 ,Ca2 +和NH+4 是起主要中和作用的离子 .春季处于季风活动期 ,污染物得到扩散和稀释 ,是酸雨最弱期 .酸雨分布有明显的地域性差异 .提高煤炭质量 ,减少重点源的SO2 排放 。
The survey of rainfall in Tangshan from 1998 to 2000 found out that the acid rain, usually in May?June?July,falls with the pH above 70% in annual precipitation under 5 6.The chemical analysis and correlative coefficient test of acid rainwater show that the causes of acid rain are SO 2- 4 and NO - 3, SO 2- 4∶NO - 3 is 6∶1,rather than Cl -.The ions Ca 2+ and NH + 4 are main materials of neutralization of acid rain. The local monsoon promoted the diffusing and clouting of pollutants. Spring is a weak period of acid rain. These are the characters of acid rain in Tangshan. It is known that from the analysis of the acid rain's distribution of time and space acid rain in the city has obvious district difference and further advances a range of control measures.
出处
《桂林工学院学报》
CAS
2002年第2期192-195,共4页
Journal of Guilin University of Technology
关键词
酸雨
时空分布规律
控制机制
唐山市
季风
二氧化硫
煤炭
acid rain
distribution regularity of time and space
control measures
Tangshan
Hebei
