超声波/纳米铁协同降解氯代苯酚的试验

通过间歇试验对超声波/纳米铁协同降解氯代苯酚(CPs)废水进行了研究,结果表明,超声波/纳米铁协同对CPs的降解率明显高于单纯超声波和单纯纳米铁的降解率;协同体系、单纯超声波和单纯纳米铁降解CPs均符合准一级反应动力学,协同体系的降解速率较单纯超声波提高了5.1~5.6倍,较单纯纳米铁提高了17.7~21倍,并且比它们的几何迭加值高4倍以上;氯代苯酚降解的准一级速率常数和降解率满足以下规律:PCP>2,4,5-TCP>2,4-DCP>3-CP;探讨了混合废水的降解:在混合废水体系中,结构易裂解的优先降解,然后为浓度高的优先降解。

Study on degradation of chlorophenols by ultrasound cooperating with nanoscale iron

The degradation of chlorophenols by ultrasound cooperating with nanoscale iron was studied through batch experiments.The results show that the degradation rate of CPs by ultrasound cooperating with nano-scale iron was higher than that of ultrasond alone or nanoscale iron alone.The degradation of CPs by ultrasound cooperating with nanoscale iron and ultrasound alone followed the pseudo-first order reaction kinetics and the rate constant of cooperation system are 5.1~5.6 times than that of ultrasound alone and 17.7~21 times than that of nanoscale iron alone,furthermore,are 4 times than that of amount of two,at the same time,the rate constant and degradation rate of CPs confirm the rule as following: PCP>2,4,5-TCP>2,4-DCP>3-CP.The degradation of mixing wastewater shows that the components with structure split easily degradate preferentially then with higher concentration degradate preferentially.