重庆市主城区降雨酸度的影响因子分析  

Affecting Factors on Precipitation Acidity in Chongqing City,China

作　　者：陈克军[1] 陈刚才[2] 张卫东[2] 孟小星[2] 王定勇[1] 

机构地区：[1]西南农业大学资源环境学院,重庆400716 [2]重庆市环境科学研究院大气所

出　　处：《矿物岩石地球化学通报》2003年第2期163-166,共4页Bulletin of Mineralogy, Petrology and Geochemistry

摘　　要：重庆市是我国酸雨较严重的地区之一 ,其酸沉降状况具有代表意义。本文分析了重庆市 2 0 0 0年和2 0 0 1年的降雨指标 (离子组分、pH、电导率 )和空气质量指标 (SO2 和NO2 ) ,降雨指标采用离子色谱法和电极法 ,空气质量指标采用紫外脉冲荧光法和化学发光法分析。结果表明 ,大气颗粒物、SO2 及NO2 对降水的酸度有不同影响。大气颗粒物中的碱式钙盐可明显降低雨水酸度 ,其可能来源为建筑施工 ;含有SO2 -4、NO-3和NH+4的酸式盐可有效增加雨水酸度。大气中的SO2 对降雨酸度增高贡献较大 ,而NO2 贡献不明显。较小的[NO-3] [SO2 -4]值 (0 .12 5 )Chongqing is one of the more serious regions of acid rain, so the acid precipitations are representative. The rain samples were measured by ion chromatography (IC) and electrode during Jan.2000-dec.2001.At the same time, SO 2 and NO 2 were measured by ultraviolet impulse fluorescence and chemical radiation,respectively.Results show that air particulates , SO 2, and NO 2 had different effects on acidity of rain. Alkaline calcium compounds in air particles could course significant decrease in the rain acidity. SO 2 had an important contribution to increasing acidity of rain.The low-mass ratios of [NO - 3]/[SO 2- 4] were ascribed to the predominance of stationary source emissions over mobile source emissions .

关 键 词：重庆 降雨酸度 降雨指标 PH 电导率 离子色谱法 电极法 空气质量指标 主城区 

分 类 号：X517[环境科学与工程—环境工程] X16