贵阳市大气总悬浮颗粒物(TSP)中水溶性无机离子的化学特性及季节变化特征

被引:19
作者
李友谊
肖化云
刘学炎
胡健
刘丛强
机构
[1] 中国科学院地球化学研究所环境地球化学国家重点实验室
关键词
TSP; 水溶无机离子; 季节性变化; 气象参数; 贵阳;
D O I
暂无
中图分类号
X513 [粒状污染物];
学科分类号
摘要
2005年1月到12月,在贵阳市区采集TSP样品,分析了其主要水溶性无机离子的化学性质及其季节变化规律。结果显示,TSP浓度年均值为106.60μg/m3;各离子摩尔浓度的大小顺序为:SO42->NH4+>Ca2+>NO3->K+>Na+>Cl->Mg2+>F-。TSP及其组分存在明显的季节变化,TSP、Cl-、SO42-、NO3-、NH4+、K+、Na+、Ca2+和Mg2+浓度的冬/夏比值分别为1.29、5.23、1.35、2.37、1.73、1.22、1.84、1.23和1.02。影响TSP、Ca2+、Mg2+和F-的气象参数主要是相对湿度和风速,影响SO42-、NO3-、NH4+和Cl-的是温度。TSP大多呈微酸性,可能是高含量的SO42-所致。NH4+与SO42-的相关性最好(R为0.85),NH4+与SO42-的摩尔比值为0.8,说明NH4+主要以(NH4)2SO4的形式存在。
引用
收藏
页码:43 / 49
页数:7
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