中文摘要：

针对桂林市区3个测点不同季节的大气颗粒物样品的离子组成分布酸化缓冲能力进行研究,探讨了该地区TSP和PM10的质量浓度、酸度和酸化缓冲能力。研究显示,Ca2＋在小颗粒中起主导作用,PM10缓冲能力强于TSP并且夏季气候酸缓冲能力强于秋季气候,同时以Ca2＋为主要阳离子的喀斯特地区在大气颗粒物中能起缓冲酸雨作用的碱性成分不多,最后分析了不同的粒径分布以及无机离子组分特征。

英文摘要：

The atmospheric particle samples of different seasons in three Karst areas are collected to conducts studies on the particles constitution and distribution and the acidification buffering capacity. Mass concentration,acidity and acidification buffering capacity of inhalable particulates（PM10） and TSP in Karst areas is analyzed. Studies show that the Ca2 ＋plays a leading role in small particles,the buffering capacity of PM10 is better than that of TSP and also acid buffering capacity in summer is better than that in autumn. At the same time,especially in Karst areas where the Ca2 ＋is the main cationic,the alkaline components are not so much to play acid rain buffering. Finally the different particles distribution and the characteristics of inorganic ion components of dust are analyzed.