4Littlejohn D, Wang Y Z, Chang S G. Oxidation of aqueous sulfite ion by nitrogen dioxide[ J]. Environmental Science & Technology,1993,27(10) :2 162-2 167.
5Clifton C L, Ahstein N, Huie R E. Rate - constant for the re- action of NO2 with sulfur(IV) over the pH range 5.3 - 13 [ J ]. Environmental Science & Technology, 1988,22 ( 5 ) : 586 - 589.