摘要
为研究重庆市可吸入颗粒物中水溶性离子组分的特征,于2006年4月和11月在重庆市主城9区和缙云山对照点采集环境中PM10样品,用离子色谱法测定9种离子组分。分析结果发现,阴离子中含量较高的分别是SO42-和NO3-占了阴离子含量的95%以上;而NH4+和Ca2+则占到阳离子含量的80%。主城各区大气中水溶性离子组分的含量明显高于对照点,且大渡口区、南岸区、九龙坡区、北碚区和渝中区的污染较为严重。在相关性分析中,NH4+与NO3-和SO42-相关性较好,Ca2+与Mg2+也体现出良好的相关性。与国内外城市相比重庆市大气PM10中,NO3-、SO42-和NH4+的浓度相对偏高,Na+和Cl-的浓度较低。
Samples of PM10 were collected in April and Nov. 2006 at 9 sites of Chongqing urban and one site for comparison. 9 water soluble ions were analyzed by ion chromatogram. Results showed that the concentration of NH4^＋ and Ca^2＋ were higher in the cation, accordingly SO4^2- and NO3^- were higher in the anion. In the urban districts, the levels of water solubility ions were higher. The relativity of Ca^2＋, NH4^＋, Mg^2＋, NO3^- and SO4^2- were well. Compared with some other cities, the water soluble ions levels were higher.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第7期109-112,共4页
Environmental Science & Technology
