正弦交流电芬顿法去除废水中四环素的试验研究
Experimental study of sinusoidal alternating electro-Fenton technology for tetracycline removal from wastewater
易师 1周益辉 1雷细平 1余刚 2徐涛3
作者信息
- 1. 湖南汽车工程职业学院,湖南 株洲 412001
- 2. 湖南大学化学化工学院,长沙 410082
- 3. 中南林业科技大学理学院,长沙 410004
- 折叠
摘要
正弦交流电芬顿法(SAEF)是一种新型的电芬顿技术.为了探讨SAEF去除废水中四环素(TC)的效能和机理,分别考察了电流密度、初始pH值、电导率和H2O2投加量等参数对TC废水处理效果的影响;探究了 SAEF处理TC废水的氧化降解过程和动力学机制.结果表明:使用SAEF对初始质量浓度为100 mg/L的TC废水进行处理,在电流密度为0.694 mA/cm2,电导率为1 075 μS/cm,30％H2O2投加量为1.17 mL/L,初始pH值为3.0,反应时间为120min的条件下,TC和COD去除率分别达94.87％和82.42％.SAEF处理过程中,TC的共轭结构首先被破坏,生成中间产物,最终被转变为无机物,在最优条件下的TC降解过程遵循二级动力学模型.
Abstract
Sinusoidal alternating electro-Fenton(SAEF)is a new type of electro-Fenton technology.In or-der to discuss the efficiency and mechanism of SAEF in removing tetracycline(TC)from wastewater,the effects of current density,initial pH value,conductivity,H2O2 dosage,and some other factors on TC wastewater treat-ment,the oxidation degradation process and mechanism of dynamics of TC wastewater by SAEF were investigat-ed.The results showed that,using SAEF technology to treat TC wastewater with initial mass concentration of 100 mg/L,when the electric current density was 0.694 mA/cm2,the conductivity was 1 075 μS/cm,the 30％H2O2 dosage was 1.17 mL/L,the initial pH value was 3.0,the reaction time was 120 min,the removal rates of TC and COD reached 94.87％and 82.42％respectively.During the SAEF process,the conjugated structure of TC was firstly destroyed to form intermediate products,and then gradually mineralized into inorganic matters.Under the optimal conditions,the TC degradation process follows the second-order kinetic model.
关键词
正弦交流电/电芬顿/四环素/氧化降解/动力学研究Key words
sinusoidal alternating electricity/electro-Fenton/tetracycline/oxidative degradation/dynamics引用本文复制引用
出版年
2024
NETL
NSTL
万方数据