Sulfate formation through copper-catalyzed SO2 oxidation by NO2 at aerosol surfaces

被引：0

作者：

Liu, Pai ^{[1
]}

Liu, Yu-Xin ^{[1
]}

Huang, Qishen ^{[1
]}

Chao, Xinyue ^{[1
]}

Zhong, Mingrui ^{[1
]}

Yin, Jiayi ^{[1
]}

Zhang, Xiaowu ^{[1
]}

Li, Lin-Fang ^{[1
]}

Kang, Xi-Yuan ^{[1
]}

Chen, Zhe ^{[1
]}

Pang, Shufeng ^{[1
]}

Wang, Weigang ^{[2
]}

Zhang, Yun-Hong ^{[1
]}

Ge, Maofa ^{[2
]}

机构：

[1] Beijing Inst Technol, Inst Chem Phys, Sch Chem & Chem Engn, Beijing, Peoples R China

[2] Chinese Acad Sci, Inst Chem,Beijing Natl Lab Mol Sci, CAS Res Educ Ctr Excellence Mol Sci, State Key Lab Struct Chem Unstable & Stable Specie, Beijing, Peoples R China

来源：

NPJ CLIMATE AND ATMOSPHERIC SCIENCE | 2025年 / 8卷 / 01期

基金：

中国国家自然科学基金;

关键词：

FINE-PARTICLE PH; TRACE-ELEMENTS; ATMOSPHERIC AEROSOLS; MULTIPHASE CHEMISTRY; HYDROXYL RADICALS; HO2; RADICALS; WINTER HAZE; AIR; CHINA; PM2.5;

D O I：

10.1038/s41612-025-00934-z

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Severe urban air pollution in China is driven by a synergistic conversion of SO2, NOx, and NH3 into fine particulate matter (PM2.5). Field studies indicated NO2 as an important oxidizer to SO2 in polluted atmospheres with low photochemical reactivity, but this rapid reaction cannot be explained by the aqueous reactive nitrogen chemistry in acidic urban aerosols. Here, using an aerosol optical tweezer and Raman spectroscopy, we show that the multiphase SO2 oxidation by NO2 is accelerated for two-order-of-magnitude by a copper catalyst. This reaction occurs on aerosol surfaces, is independent of pH between 3 and 5, and produces sulfate by a rate of up to 10 mu g m-3air hr-1 when reactive copper reaches a millimolar concentration in aerosol water - typical of severe haze events in North China Plain. Since copper and NO2 are companion emitters in air pollution, they can act synergistically in converting SO2 into sulfate in China's haze.

引用

页数：11

共 86 条

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