生态环境学报Issue(3)：512-516,5.
闽南重点城市春季PM2.5中水溶性无机离子特征研究
Study on the characteristics of water-soluble inorganic ions in PM2.5 in spring in the key cities of southern Fujian province
摘要
Abstract
Atmospheric PM2.5 samples were collected by polypropylene fiber filters simultaneously in spring from March 7, 2011 to March 16, 2011 in the key cities of southern Fujian province, including the urban and suburban sites of Xiamen city, as well as the urban sites of Zhangzhou and Quanzhou city. The sample filters were dipped in ultrapure water (18.2 MΩ·cm) and the water-soluble inorganic ions were extracted by ultrasonic bath for 30 min. The 9 water-soluble inorganic ions (F-, Cl-, NO3-, SO42-, Na+, K+, NH4+, Ca2+, Mg2+) were determinated by ion chromatography. This study aimed to profile the pollution characteristics of the water-soluble inorganic ions in PM2.5, and to analysis and discuss the similarities and differences of water-soluble inorganic ions among the key cities of the southern Fujian Province, so as to providing the basis for air pollution control at the southern Fujian Province which was in a growing trend of air pollution. The results showed that:(1) The pollution characteristics of PM2.5 in the key cities of southern Fujian Province in spring had a similar trend, the average concentration of atmospheric PM2.5 was 94.14μg·m-3, and the concentrations of secondary ions of SO42-, NO3-and NH4+ranged from 14.66 to 66.68μg·m-3 with a mean value of 32.43μg·m-3, and covered 83.30 percentage of the total water-soluble inorganic ions, which were mainly existed in aerosols in the form of (NH4)2SO4 and NH4NO3, the level of secondary ions concentration was relatively high comparing with other major domestic cities. (2) The ratios of NO3-/SO42-, NOR and SOR indicated that the stationary emission was the primary source to the atmospheric pollution in key cities of southern Fujian Province, however, the mobile sources in Xiamen presented a higher contribution. Comparingwith other areas of China, the high level of the concentrations of secondary ions in southern Fujian Province was also due to the high level of nitration of NOx, which resulted from the humid and rainy weather in spring in southern Fujian Province. (3) As a coastal area, the major contributions to the water-soluble ions in PM2.5 in the southern Fujian province were anthropogenic sources, rather than the sea salt.关键词
闽南地区/PM2.5/水溶性无机离子/春季Key words
southern Fujian province/PM2.5/water-soluble inorganic ions/spring分类
资源环境引用本文复制引用
邱天雪,陈进生,尹丽倩,牛振川,张福旺,徐玲玲..闽南重点城市春季PM2.5中水溶性无机离子特征研究[J].生态环境学报,2013,(3):512-516,5.基金项目
厦门市科技计划项目(3502Z20122013)；环保公益性行业科研专项(201009004) （3502Z20122013）
