庐山春季降水化学的研究  

The chemical composition of precipitation at Lushan spring

作　　者：王保安[1] 张远航[1] 张铮[1] 秦瑜[1] 

机构地区：[1]北京大学环境科学中心,北京大学地球物理系,北京市宜武区计划委员会

出　　处：《中国环境科学》1996年第3期218-222,共5页China Environmental Science

摘　　要：对庐山春季降水的化学组成进行了研究。庐山大气中ＳＯ＿２、ＮＯ＿Ｘ、ＮＨ＿３、ＨＮＯ＿３浓度较低；降水酸化严重，所采样品的ｐＨ值全部小于５．６，最小ｐＨ值为３．７１，平均ｐＨ值为４．２６，降水中主要酸性物质是硫酸，而硝酸则占次要地位；云雾水组成高于降水，且酸度强于降水；对不同相态降水的比较表明，固相降水组成比雨水高２～６倍，但ｐＨ值比雨水高０．６倍。根据研究结果推测，降水酸化是局地大气污染物的清除与酸性物质长距离输送共同作用的结果。The chemical composition of precipitation at Lushan in spring of 1993 was studied.The concentrations of SO_2, NO_2, NH_3 and NHO_3 in air were very low;the precipitation was acidified seriously with pH values of all samples below 5. 6, the lowest pH value was 3.71 and the average was 4. 26. The major acidic material in precipitation was sulfate.The composition of cloud water was higher than precipitation; the composition of solid precipitation was higher than liquid precipitation by 2￣6times; but the pH value was only 0. 6 higher. It is expected that the acidification of precipitation was caused by the integration of long-distance transfer and cleaning of local pollutants.

关 键 词：降水 云雾水 降水酸化 PH值 大气污染物 

分 类 号：X510.2[环境科学与工程—环境工程]