What are the reactions involved in removing SO_2 from the atmosphere by passing it through a solution containing nitrate ions ?

What are the reactions involved in removing SO_2 from the atmosphere b

1.	What are the reactions involved in removing SO_2 from the atmosphere by passing it through a solution containing nitrate ions ?
Answer» SOLUTION :`SO_2+H_2O HARR HSO_3^(-) + H^(+) , HSO_3^(-) + H_2Cit^(-) to UNDERSET"(Complex)"(HSO_3.H_2Cit)^(2-)`