Oumar Ka

TL;DR: In this paper, mixed TiO2-SiO2, Saharan dust and Arizona Test Dust were exposed to NO2 in a coated wall flow tube reactor and photoenhanced uptake of NO2 was observed on all samples.

TL;DR: In this article, the photodecomposition of NO3− at the surface of synthetic mineral dust samples of SiO2, TiO2 and mixed TiO 2-SiO2 was studied by means of a flow-tube at 298 K with UV-illumination in the 340-420 nm range at relative humidity between 5 and 80%.

TL;DR: The experimental results suggest that under atmospherically relevant conditions the photochemistry of dust can represent an important sink of ozone inside the dust plume.

TL;DR: It is shown that the photochemistry of natural minerals will impact significantly on the heterogeneous chemistry of NO(2) under realistic atmospheric conditions, i.e. an enhancement factor ranging from 8 to 15.

TL;DR: Using the Hertz model, the elastic moduli resulting from the total and vertical forces are calculated and compared, showing that the differences are important and the total force should be considered.