Study On Emergency Treatment Technology Of Heavy Polluted Landscape Water

In recent years, the landscape water was polluted more and more seriously, waterquality was in deterioration, and aqueous solution of various organic and inorganicpollutants were seriously overweight, In this paper, NaClO and H₂O₂was used to dealwith emergency pollution of landscape water by chemical oxidation, throughoxidative degradation of pollutants, in a short time to improve the water qualityof landscape water. Main research and results are as follow:NaClO（10%available chlorine） was used separately to treat landscape water,determining the best dosage and reaction time by experiment, studying the effect of light,pH, temperature and fractionated dosing on the degradation of pollutants. The results showthat:（Ⅰ）the best emergency treatment dosage of NaClO is2mL/L, the best reaction time is1hour.（Ⅱ） Light dose inhibition to the degradation of pollutants, but the effect is notobvious.（Ⅲ） With the increasing of the pH value, TN and NH₄⁺-N removal rate increasedat first and then decreased, while the COD_crand color removal rate decreased, so it is notnecessary to change the pH of water.（Ⅳ） Temperature has little effect on the degradationof pollutants, therefor in the actual processing, it is not necessary to change thetemperature of water.（Ⅴ）Fractionated dosing has no impact on pollutant removalbasically.H₂O₂was used separately or associated with NaClO to treat landscape water,determining the best dosage and reaction time by experiment, studying the effect of light,pH, temperature and associate treatment on the degradation of pollutants. The results showthat:（Ⅰ）the best emergency treatment dosage of H₂O₂is0.5mL/L, the best reaction time is45min.（Ⅱ） Light can significantly promote the H₂O₂degradation of pollutants.（Ⅲ）COD_crand color removal rate decreased as the pH value increased, while the NH₄⁺-Nremoval rate,along with the increasing pH value increased, so it is not necessary to changethe pH of water.（Ⅳ） Temperature has little effect on the degradation ofpollutants, therefor in the actual processing, it is not necessary to change the temperature of water.（Ⅴ）The effect of NaClO associated with H₂O₂to treat landscape water was worsethan separately treatment, COD_cr, NH₄⁺-N, colour removal rate are only11.56%,6.15%,16.67%respectively.