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实验室发生纳米气溶胶吸湿性表征

王 轩 陈建华 陈建民 叶兴南 刘红杰 王 玮 邓建国

王 轩, 陈建华, 陈建民, 叶兴南, 刘红杰, 王 玮, 邓建国. 实验室发生纳米气溶胶吸湿性表征[J]. 环境科学研究, 2011, 24(6): 621-631.
引用本文: 王 轩, 陈建华, 陈建民, 叶兴南, 刘红杰, 王 玮, 邓建国. 实验室发生纳米气溶胶吸湿性表征[J]. 环境科学研究, 2011, 24(6): 621-631.
WANG Xuan, CHEN Jian-hua, CHEN Jian-min, YE Xing-nan, LIU Hong-jie, WANG Wei, DENG Jian-guo. Characterization of Hygroscopic Properties of Laboratory-Generated Nanometer Aerosols[J]. Research of Environmental Sciences, 2011, 24(6): 621-631.
Citation: WANG Xuan, CHEN Jian-hua, CHEN Jian-min, YE Xing-nan, LIU Hong-jie, WANG Wei, DENG Jian-guo. Characterization of Hygroscopic Properties of Laboratory-Generated Nanometer Aerosols[J]. Research of Environmental Sciences, 2011, 24(6): 621-631.

实验室发生纳米气溶胶吸湿性表征

基金项目: 国家自然科学基金项目(40775075);国家环保公益性行业科研专项(200809052)

Characterization of Hygroscopic Properties of Laboratory-Generated Nanometer Aerosols

  • 摘要: 气溶胶吸湿特性对于灰霾的形成、气溶胶对气候变化的影响及人体健康效应具有重要意义. 采用加湿迁移差分分析(HTDMA)法,对实验室发生的8种纳米级无机和有机气溶胶进行吸湿特性定量表征,从而判定影响气溶胶吸湿特性的主要因素. 结果表明,NaCl和(NH4)2SO4气溶胶的潮解点为相对湿度(RH)75%±2%,与理论计算结果相接近,说明测试系统具有一定的可靠性. 对以往研究较少的NaNO3,CaCl2,CaSO4,合成海盐,乙二酸和己二酸气溶胶的测试表明,NaNO3,CaCl2以及合成海盐气溶胶随RH的升高粒径逐渐增大;合成海盐气溶胶在RH为86%时吸湿性生长因子(Gf)达到1.80;CaSO4,乙二酸和己二酸气溶胶随着RH增大未见明显吸湿增长. 通过扫描电镜分析了8种化合物气溶液在不同RH下的形态特征,为掌握各种化学组分对气溶胶吸湿特性的影响提供了微观形态分析的依据.

     

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出版历程
  • 收稿日期:  2011-01-09
  • 修回日期:  2011-03-23
  • 刊出日期:  2011-06-25

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