Studies On Degradation Of Chlorination Aromatic Hydrocarbon In Wastewater By Ultrasound Cooperated With Nanoscale Iron

The synergic degradation effictiveness of chlorination aromatic hydrocarbon by the lastest innovative technologies of ultrasound cooperated with nanoscale iron was reported. Three kinds of degradation systems, ultrasound cooperated with nanoscale iron, ultrasound alone and nanoscale iron alone were contrasted on the effictiveness. The optimum operation system was achieved from the experiments that approach the effect of pH, the amount of nanoscale iron, the available output acoustic intensity and initial concentration on the synergic degradation effictiveness, at the same time, the kinetics that chlorination aromatic hydrocarbons were degraded by ultrasound cooperated with nanoscale iron were studied and the structure-activity relationships were studied preliminary.The results suggest that the rate of synergic degradation improved 5.1~5.6 times than that of ultrasound alone and 17.7 times than that of nanoscale iron alone for chlorophenols and 27 times than that of ultrasound alone for chlorobenzene, at the same time, the operation factors of synergic system were explorated concrete and the optimum operation conditions for 2,4-dichlorophenol were pH=3, the amount of nanoscale iron =6.7g/L, the available output acoustic intensity=3.56W/cm2 and for chlorobenzene as follow with pH=3/12, the amount of nanoscale iron =1.3g/L, the available output acoustic intensity=6.85W/cm2, as for initial concentrations, the degradation rates increase when it decrease.The synergic degradation of ultrasound cooperated with nano- scale iron on chlorophenols and cholrobenzene follow with the pseudo-first order kinetics reaction through the analysis of experimental data and reaction mechanism.There are certain structure-activity relationships between the degradation rates of chlorination aromatic hydrocarbon by ultra- sound cooperated with nanoscale iron and chemical constitutions.