The Kinetic Study of Microcystin-LR Degradation Induced by Nitrous Acid

For the first time,the degradation of MC-LR by nitrous acid was studied.Degradation of MC-LR was obvious in the present of sodium nitrite under acidic conditions and no degradation was observed under neutral and alkaline conditions or in the absence of sodium nitrite.The degradation rate increased when the pH value decreased,but did not change positively with the NaNO2 concentration.Results showed that 94.89%of MC-LR was removed within 5h under optimum initial condition of 5mmol/L sodium nitrite,pH 1.73,and 9.78mg/L MC-LR.