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首页> 外文期刊>Environmental Science & Technology >Historical Changes in Seasonal Aerosol Acidity in the Po Valley (Italy) as Inferred from Fog Water and Aerosol Measurements
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Historical Changes in Seasonal Aerosol Acidity in the Po Valley (Italy) as Inferred from Fog Water and Aerosol Measurements

机译：从雾水和气溶胶测量中推断出PO谷（意大利）季节性气溶胶酸度的历史变化

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摘要

Acidity profoundly affects almost every aspect that shapes the composition of ambient particles and their environmental impact. Thermodynamic analysis of gas-particle composition datasets offers robust estimates of acidity, but they are not available for long periods of time. Fog composition datasets, however, are available for many decades; we develop a thermodynamic analysis to estimate the ammonia in equilibrium with fog water and to infer the pre-fog aerosol pH starting from fog chemical composition and pH. The acidity values from the new method agree with the results of thermodynamic analysis of the available gas-particle composition data. Applying the new method to historical (25 years) fog water composition at the rural station of San Pietro Capofiume (SPC) in the Po Valley (Italy) suggests that the aerosol has been mildly acidic, with its pH decreasing by 0.5-1.5 pH units over the last decades. The observed pH of the fog water also increased I unit over the same period. Analysis of the simulated aerosol pH reveals that the aerosol acidity trend is driven by a decrease in aerosol precursor concentrations, and changes in temperature and relative humidity. Currently, NO_x controls would be most effective for PM_(2.5) reduction in the Po valley both during summer and winter. In the future, however, seasonal transitions to the NH_3-sensitive region may occur, meaning that the NH_3 reduction policy may become increasingly necessary.
机译：酸度深刻影响几乎塑造环境微粒和对环境的影响的组合物中每一个方面。气体粒子组成的数据集的热力学分析提供酸度的强大的估计，但他们并不适用于很长一段时间。雾组成的数据集，但是，可用于几十年;我们开发了一个热力学分析，有雾水以估计氨的平衡和推断从雾化学组成和pH值开始预雾气溶胶pH值。从该新方法的酸度值一致与可用气体粒子组合物数据的热力学分析的结果。运用历史（25年）雾水组成的新方法，在圣彼得Capofiume（SPC）在宝谷（意大利）的农村站表明，气溶胶一直弱酸性，用其将pH 0.5-1.5通过pH单位减少在过去的几十年。雾水的观测pH值也同期提高I单元。模拟的气溶胶pH值的分析表明，该气溶胶酸度的趋势由下降烟雾剂产物母体的浓度驱动，并且在温度和相对湿度的变化。目前，NO_x的控制可能是夏季和冬季最有效的PM_（2.5）减少波河流域。在未来，然而，可能会出现季节性转换为NH3-敏感区域，这意味着NH_3减排政策可能会变得越来越有必要。

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  • 来源
    《Environmental Science & Technology》 |2021年第11期|7307-7315|共9页
  • 作者

    Marco Paglione; Stefano Decesari; Matteo Rinaldi; Leone Tarozzi; Francesco Manarini; Stefania Gilardoni; Maria Cristina Facchini; Sandro Fuzzi; Dimitri Bacco; Arianna Trentini; Spyros N. Pandis; Athanasios Nenes;

  • 作者单位

    Institute for Chemical Engineering Sciences Foundation for Research and Technology Hellas Patras 26504 Greece Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy Italian National Research Council-Institute of Marine Sciences (CNR-ISMAR) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy Italian National Research Council-Institute of Polar Sciences (CNR-ISP) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy;

    Italian National Research Council-Institute of Atmospheric Sciences and Climate (CNR-ISAC) Bologna 40129 Italy;

    Regional Agency for Prevention Environment and Energy (ARPAE) of Emilia-Romagna Bologna 40122 Italy;

    Regional Agency for Prevention Environment and Energy (ARPAE) of Emilia-Romagna Bologna 40122 Italy;

    Institute for Chemical Engineering Sciences Foundation for Research and Technology Hellas Patras 26504 Greece Department of Chemical Engineering University of Patras Patras 26504 Greece;

    Institute jor Chemical Engineering Sciences Foundation for Research and Technology Hellas Patras 26504 Greece School of Architecture Civil & Environmental Engineering Ecole Polytechnique Federale de Lausanne 1015 Lausanne Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    aerosol pH; jog water chemical composition; gas-particle partitioning; thermodynamics;

    机译：气溶胶pH;慢跑水化学成分;气体颗粒分配;热力学;

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