EFFECT OF ORGANICS ON THE FORMATION OF NITRITE WITH ULTRAVIOLET IRRADIATION

This paper studied the transformation of inorganic nitrogen with UV irradiation. In the reaction, the effects of different organics on the formation of nitrite were also studied and compared. The experimental results showed that NO2- -N can not be formed from NH3 -N but can be formed from NO3- -N with UV irradiation. The addition of organics can accelerate the formation of NO2- -N. The accelerating effect of organics depends on its reducibility. Stronger reducibility brings about greater effect. The effects of some organics on the formation of nitrite can be showed as following: for the organics with same carbon chain, the sequence is alcohol aldehyde acid ketone and more functional groups have greater accelerating effect; for the organics with same functional group , longer carbon chain have greater accelerating effect.