摘要
利用微量酸碱滴定方法测定日本关东地区冬季高浓度飘尘的酸度，估算了飘尘对酸性降水的缓冲能力，并对飘尘水溶性离子组成进行了分析。结果发现：该地区飘尘的酸性很强，Ｈ＋浓度在２４ｎｅｑ／ｍ３以上，是我国北方城市飘尘的几千倍，这表示该地区大气环境已严重酸化，可能是该地区酸雨形成的主要原因；飘尘的水溶性离子组成与我国飘尘截然不同，飘尘中Ｃｌ－浓度很高，ＳＯ４２－、ＮＯ３－的浓度也较高，说明飘尘主要来自人为源，ＮＨ４＋浓度则占全部阳离子８０％以上，飘尘的这种组成也是非常特殊的。
The acidity of aerosols collected in Kando plain in winter was measured by micro acid base titratim method and the buffering capability of aerosols on acidic rainwater was caculated. We find that the acidify of aerosols in this area is very high, and H + concentration is more than 24neq/m 3, which is several thousand times higher than the one in northern China cities The high acidity of aerosol shows that the atmospheric acidification is very serious and this may be the main reason of the acid rain formation in this area. Results also show that the ionic compositions of rain water in Kando plain are very different from that in China, Cl - concentration is very high, the ones of SO 4 2- ,NO - 3are also quite high, This shows that artificial sources are the main source of SPM. NH + 4 concentration accounts for more than 80% of tatol cations. This compositions of SPM are very special.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1996年第6期438-442,共5页
China Environmental Science
基金
日本国际善邻协会资助
