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盘锦市冬季PM2.5水溶性离子特征及来源分析
摘要点击 390  全文点击 224  投稿时间:2017-10-09  修订日期:2017-11-28
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中文关键词  盘锦市  冬季  PM2.5  水溶性离子  来源解析
英文关键词  Panjin City  winter  PM2.5  water-soluble ions  source apportionment
作者单位E-mail
张蕾 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 995421075@qq.com 
姬亚芹 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350 jiyaqin@nankai.edu.cn 
王士宝 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350  
赵静琦 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350  
张军 盘锦市环境保护监测站, 盘锦 124010  
李越洋 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350  
张伟 南开大学环境科学与工程学院, 国家环境保护城市空气颗粒物污染防治重点实验室, 天津 300350  
中文摘要
      为探讨盘锦市冬季PM2.5水溶性离子污染特征和来源,于2017年1月采集3个点位的PM2.5样品,用ICS-900离子色谱仪分析了8种离子(Na+、Mg2+、Ca2+、K+、NH4+、SO42-、Cl-和NO3-).开展了PM2.5和离子浓度特征分析、硫氧化率(SOR)和氮氧化率(NOR)计算、离子平衡计算、主成分分析等.结果表明:盘锦市冬季PM2.5浓度与水溶性离子浓度特征为文化公园>开发区>第二中学;SO42-、NO3-、NH4+质量浓度较大;冬季硫氧化率(SOR)和氮氧化率(NOR)的均值均大于0.10,说明SO42-、NO3-主要由SO2和NOx转化而来;阳离子和阴离子当量相关性较强;开发区整体上呈现出中性,文化公园与第二中学呈现出偏碱性;盘锦市PM2.5中水溶性离子主要来源于煤烟尘,生物质燃烧,二次粒子以及扬尘.
英文摘要
      In order to study the characteristics and source of water-soluble ions in PM2.5 in Panjin, PM2.5 samples were collected at three sites in January of 2017, and the levels of eight ions (Na+, Mg2+, Ca2+, K+, NH4+, SO42-, Cl-, and NO3-) were determined by ICS-900 ion chromatograph. The characteristics of PM2.5, the water-soluble ion concentration, SOR and NOR calculation, and ion balance calculation were investigated, and a principal component analysis was conducted. The results showed that the concentration of PM2.5 and water-soluble ions followed a descending sequence of park > development zone > the second middle school. SO42-, NO3-, and NH4+ were the major components of the water-soluble ions at the three sampling sites. SOR and NOR values were all higher than 0.10, indicating that SO42- and NO3- were mainly converted from SO2 and NOx. The ion balance calculation demonstrated that the cationic and anion equivalents in Panjin had great correlation in winter. Further study showed that the atmosphere in the development zone presented as neutral and that in the cultural park and the second middle school presented as partially alkaline. The principal component analysis further indicated that the water-soluble ions were mainly derived from fuel combustion, biomass burning, secondary particles, and re-suspended dust in winter.

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