US/FeEDTA/H_2O_2协同降解壬基酚聚氧乙烯醚废水研究

Synergistic degradation of non-ylphenol ethoxylates with US/FeEDTA/H_2O_2

采用US/FeEDTA/H2O2体系协同降解壬基酚聚氧乙烯醚废水。探讨了初始pH值、H2O2质量浓度、FeEDTA质量浓度、超声波功率以及壬基酚聚氧乙烯醚的初始质量浓度对壬基酚聚氧乙烯醚降解效果的影响及FeEDTA/H2O2和超声波之间的协同效应。结果表明,US/FeEDTA/H2O2体系降解壬基酚聚氧乙烯醚废水时产生较强的协同作用,而不是简单的几何叠加。US/FeEDTA/H2O2体系对壬基酚聚氧乙烯醚的去除率比超声波与FeEDTA/H2O2体系的几何叠加的去除率高出约60%。在pH=9、H2O2质量浓度250kg/L、FeEDTA质量浓度100mg/L、超声波功率600W的条件下,对初始质量浓度为100mg/L的壬基酚聚氧乙烯醚溶液降解2h,其去除率在99%以上。

The present article aims to introduce the authors＇ experimental research with the degradation processing of the nonylphenol ethoxylates （NP10EO） wastewater. As is the case in the chemical industry practice, the surface active agents （SAA） are prone to bring about serious pollution on the enviromnent when SAA leaks through into water and soll along with wastewater and rubbish when the SAA is released. Therefore, it is essential to get them properly treated before they are let into water and soil in the surroundings. It is fortunate that the problem can be solved by using a system of US/FeEDTA/ H2O2, which is known as a process being simple, efficient, safe, flexible as well as compact. Our experiments help us to reveal the main characteristics of the degradation process with a detailed discussion of the effect of initial pH, H2O2 amount, FeEDTA amount, ultrasound power and initial concentration of NP10EO on the degradation efficiency of the NP10EO wastewater. It is also found that the degradation system is of great significance to the degradation of NP10EO. Our study also shows that, the effect of the systems of US/FeEDTA/ H2O2 on the degradation can be enhanced noticeably at presence of FeEDTA catalyst with the rate of degradation efficiency being able to reach 99% on the condition that pH = 9,H2O2 concentration is 250 mg/L, FeEDTA concentration reaches 100 mg/L, the ultrasound power is equal to 600 W and the initial concentration 100 mg/L of NP10EO when the reaction lasts 120 min.