Reactions at interfaces as a source of sulfate formation in sea-salt particles
Reactions at interfaces as a source of sulfate formation in sea-salt particles
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DOI：
10.1126/science.1085374
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发表时间：
2003-07-18
期刊：
影响因子：
56.9
通讯作者：
Finlayson-Pitts, BJ
中科院分区：
文献类型：
--
作者：
Laskin, A;Gaspar, DJ;Finlayson-Pitts, BJ
了解对流层中硫酸盐颗粒的形成至关重要，因为它们对健康有影响，并且对辐射强迫有直接和间接的影响，进而影响气候。对氯化钠（海盐颗粒的主要成分）化学和物理变化的实验室研究表明，潮解的氯化钠颗粒与气相氢氧化物反应会产生氢氧化钠。碱度的增加将导致海盐颗粒中二氧化硫的吸收以及氧化为硫酸盐的过程增加。当前的模型中缺失这种化学过程，但它与许多先前无法解释的实地研究观测结果是一致的。
Understanding the formation of sulfate particles in the troposphere is critical because of their health effects and their direct and indirect effects on radiative forcing, and hence on climate. Laboratory studies of the chemical and physical changes in sodium chloride, the major component of sea-salt particles, show that sodium hydroxide is generated upon reaction of deliquesced sodium chloride particles with gas-phase hydroxide. The increase in alkalinity will lead to an increase in the uptake and oxidation of sulfur dioxide to sulfate in sea-salt particles. This chemistry is missing from current models but is consistent with a number of previously unexplained field study observations.