研究论文
邱晨晨,宫海星,于兴娜,丁铖,侯思宇,张瑞芳,侯新红.南京江北新区PM2.5中水溶性离子的季节特征和来源解析[J].环境科学学报,2021,41(5):1718-1726
南京江北新区PM2.5中水溶性离子的季节特征和来源解析
- Seasonal characteristics and source apportionment of water-soluble ions in PM2.5 of Nanjing Jiangbei New Area
- 基金项目：国家重点研发计划（No.2019YFC0214604）；国家自然科学基金（No.41775154）；江苏省"六大人才高峰"项目（No.JNHB-057）；江苏省研究生实践创新计划（No.SJCX20_0303）
- 作者
- 单位
- 邱晨晨
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 宫海星
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 于兴娜
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 丁铖
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 侯思宇
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 张瑞芳
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 侯新红
- 南京信息工程大学气象灾害预报预警与评估协同创新中心, 中国气象局气溶胶与云降水重点开放实验室, 南京 210044
- 摘要：为探究南京江北新区PM2.5中水溶性离子的季节特征和来源，于2019年共采集了113个有效PM2.5样品.用称重法和离子色谱法分别测定出PM2.5和10种水溶性离子的质量浓度，并使用PMF源解析法对其进行来源解析.结果表明，观测期间南京江北新区PM2.5和水溶性离子年平均浓度分别为（78.34±29.64）和（35.68±18.30）μg·m-3，其四季变化趋势相同，冬季浓度高，夏季浓度低.10种水溶性离子中NO3-、SO42-和NH4+的浓度远远高于其他离子，其在总离子中的含量高达89.9%.南京江北新区四季PM2.5中NH4+主要与HSO4-和NO3-结合存在.硫氧化率（SOR）和氮氧化率（NOR）的年均值分别为0.53和0.28，说明观测期间大气中氮硫的二次生成率较高.南京江北新区PM2.5中水溶性离子主要来源为二次转化、海盐和扬尘.
- Abstract：To investigate seasonal variations and source of water-soluble ions in Nanjing Jiangbei New Area, a total of 113 PM2.5 samples were collected in 2019. Water-soluble inorganic ions were determined by ion chromatography, and PMF source analysis was employed for source apportionment. The result showed that the annual average concentration of PM2.5 and water-soluble ions in Nanjing Jiangbei New Area were (78.34±29.64) and (35.68±18.30) μg·m-3, respectively. The variation trend of the four seasons was similar with higher concentration in winter and lower concentration in summer. Concentrations of NO3-, SO42-, and NH4+ in 10 ions were much higher than others, and the relative contribution of total ions concentrations was up to 89.9%. NH4+ mainly combined with HSO4- and NO3- of four seasons in Nanjing Jiangbei New Area. The mean values of the sulfur oxidation rate (SOR) and the nitrogen oxidation rate (NOR) were 0.53 and 0.28, respectively, indicating that there was a high secondary aerosol transformation rate of nitrogen and sulfur. The water-soluble ions of PM2.5 mainly derived from secondary transformation, sea salt and dust in Nanjing Jiangbei New Area.
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