纳米Ni/Fe双金属还原降解对氯硝基苯的影响因素

利用自制的纳米Ni/Fe双金属对对氯硝基苯(p-NCB)催化脱氯进行研究,考察了镍化率、Ni/Fe投加量、反应温度、初始pH值和p-NCB初始浓度等反应参数对脱氯效果的影响.研究结果表明,反应产物为苯胺和Cl-;较高的镍化率、Ni/Fe投加量和反应温度可以促进p-NCB的还原降解;初始pH值有最佳浓度范围,较高pH值和较低pH值都不利于反应的进行.

Effects of Nanoscale Bimetal Ni/Fe on Dechlorination of p-Nitrochlorbenzene

Nanoscale bimetals Ni/Fe prepared by chemical deposition were utilized as the catalyst for remediation in con-taminated water.Several important experiment parameters involved in this process were studied,including Ni mass fraction,amount of Ni/Fe used,reaction temperature,initial pH and initial concentration of p-nitrochlorbenzene(p-NCB).The results showed that nanoscale bimetals Ni/Fe could be applied in the dechlorination of p-NCB effectively with the products of ani-line and Cl-,and the higher Ni weight ratio,amount of Ni/Fe used and reaction temperature could accelerate the dechlorina-tion of p-NCB.The initial pH had an optimal range and the higher or lower pH would decrease the reaction rate.