BrCl source & impact (IMAGE)

Science China Press

BrCl source & impact

Caption

Coal burning from rural households emits reactive bromine gases and particulate halogens. Daytime sunlight-assisted processes, possibly involving nitrate, activate particulate Br to produce HOBr and BrCl. BrCl is also produced by the reaction of HOBr with particulate Cl during day and night. BrCl is photolyzed to Cl and Br atoms in the daytime. VOCs are oxidized by Cl atoms (mainly on alkanes) and Br atoms (mainly on aldehydes) to produce ozone and secondary aerosols. Moreover, Br atoms significantly accelerate the mercury deposition near the source. The background photo shows the nearby village and the location of the measurement site. (Photo Credit: Chenglong Zhang and Pengfei Liu; RCEES, CAS).

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@Science China Press

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