| The floation reagents is a major component of pollution in the mine wastewater, is characterized by difficult degradation, great toxicity and so on. It has great threate to human health and serious pollution the environment. Study the degradation law and analyse the degradation mechanism of the floation reagent, provide the theoretical basis for seek a kind of economic and efficient treatment for industry, all of them have important significance to solve the pollution problem of benefication wastewater and protect the mine ecological environment.The research object are common sulfide flotation collectors such as Butyl Xanthate, Sodium diethyldithiocarbamate and LP-01 in the paper. Analyse the degradation properties of sulfide flotation collectors, and discuss the influences of the degradation properties with different reaction conditions by sodium hypochlorite oxidation and Fenton reagent oxidation. The results show that the removal efficiency of three sulfide flotation collectors with sodium hypochlorite is very good. The optimum technological conditions of sodium hypochlorite treating Butyl Xanthate is the initial solution pH 4, the reaction temperature 20℃, the dosage of sodium hypochlorite 120 mg·L-1, the reaction time 50 min, under this condition, the removal rate of Butyl Xanthate and COD is up to 99.51% and 91.14% respectively. The optimum technological conditions of sodium hypochlorite treating sodium diethyldithiocarbamate is the initial solution pH 4, the dosage of sodium hypochlorite 30 mg·L-1, the reaction temperature is room temperature, the reaction time 30 min, under this condition, the removal rate of Butyl Xanthate and COD is up to 99.78% and 94.75% respectively. The optimum technological conditions of sodium hypochlorite treating LP-01 is the initial solution pH 6, the reaction temperature is room temperature, the dosage of sodium hypochlorite 240 mg·L-1, the reaction time 30 min, under this condition, the removal rate of LP-01 and COD is up to 99.87% and 90.69% respectively. Treatment of practical benefication wastewater by sodium hypochlorite in the paper, the technological conditions of sodium hypochlorite treating practical benefication wastewater is the initial solution pH 4, the dosage of sodium hypochlorite 160 mg·L-1, the soulution pH is 6～7, the residual COD is 90.71 mg·L-1 in solution. Therefore, treatment of the floation reagent in the benefication wastewater by sodium hypochlorite is very effective.The mechanism of sodium hypochlorite treating three kind of sulfide flotation collectors is studied by Ultraiolet radiation spectrum analysis. By the changes of characteristic absorption peaks of ulfide flotation collectors and after oxidized,analyse the concentration changing of the collectors before and after oxidized, and speculate on the final products that sodium hypochlorite oxidizing three kind of sulfide flotation collectors. The results show that sodium hypochlorite oxidation can remove the flotation reagent of Butyl xauthate, Sodium diethyldithiocarbamate and LP-01 effectively, and cause the difficult organic convert to small oraganic molecules substance as CO2 and H2O. Sodium hypochlorite oxidation has reduced environmental hazards caused by flotation reagents and solved the problem of mine drainage pollution. It has provided an effective way to protect the ecological environment . |
