Parameterization of heterogeneous reaction of SO₂ to sulfate on dust with coexistence of NH₃ and NO₂ under different humidity conditions.

ABSTRACT: Sulfate plays an important role in atmospheric haze in China, which has received considerable attention in recent years. Various types of parameterization methods and heterogeneous oxidation rates of SO₂ have been used in previous studies. However, properly representing heterogeneous sulfate formation in air quality models remains a big challenge. In this study, we quantified the heterogeneous oxidation reaction using experimental results that approximate the haze conditions in China. Firstly, a series of experiments were conducted to investigate the heterogeneous uptake of SO₂ with different relative humidity (RH) levels and the presence of NH₃ and NO₂ on natural dust surfaces. Then the uptake coefficients for heterogeneous oxidation of SO₂

SUBMITTER: Zhang S 

PROVIDER: S-EPMC6559380 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature