Numerical simulation of pollutants removal by precipitation

✍ Scribed by Yu Qin

• Publisher: Springer Netherlands
• Year: 1992
• Tongue: English
• Weight: 391 KB
• Volume: 14
• Category: Article
• ISSN: 0167-7764
• DOI: 10.1007/bf00115230

✦ Synopsis

The acidification of precipitation and the wet removal of pollutants in South China in spring are evaluated by using a one dimensional, time-dependent, physico-chemical model of stratiform clouds. The results are consistent with the mean field data. In the typical condition, the in-cloud scavenging of gases and aerosols is the major removal process at the begining of rainfall, then fractions of bclow-cloud scavenging of S(VI) from S(IV) oxidation, NH 3, HNO 3 and particles increase gradually. It can bc treated as an irreversible process. Numerical tests show that the concentration of oxidants, H20 / can affect wct removal of SO/, as well as the formation and deposition amount of S(VI). The convergence of airflow can compensate partially the depletion of pollutants by wet removal.