Ultrasound enhanced heterogeneous activation of peroxydisulfate by magnetite catalyst for the degradation of tetracycline in water
Ultrasound enhanced heterogeneous activation of peroxydisulfate by magnetite catalyst for the degradation of tetracycline in water
复制标题
超声波增强磁铁矿催化剂对过二硫酸盐的非均相活化降解水中四环素
DOI：
10.1016/j.seppur.2011.06.023
复制
发表时间：
2012-01-09
影响因子：
8.6
通讯作者：
Xue, Xiaofei
中科院分区：
文献类型：
--
作者：
Hou, Liwei;Zhang, Hui;Xue, Xiaofei
研究了超声波作用下，磁铁矿(Fe3O4)活化的过氧二硫酸盐(Na2S2O8)对四环素的去除作用。考察了Na2S2O8浓度、Fe3O4加入量、超声波功率、初始浓度和初始pH对四环素降解的影响。结果表明，四环素的去除效果随Fe3O4投加量的增加而增加，随初始pH和四环素初始浓度的增加而降低。当Na2S2O8浓度和超声功率达到最佳值时，降解率最高。以乙醇、叔丁醇和1，4-苯二酚为清除剂，考察硫酸盐自由基、羟基自由基和超氧阴离子自由基的作用。结果表明，硫酸根和羟基在Fe3O4/Na2S2O8/US工艺降解四环素过程中起重要作用。(C)2011年，由爱思唯尔出版。
The removal of tetracycline by magnetite (Fe3O4) activated peroxydisulfate (Na2S2O8) in the presence of ultrasound irradiation has been performed in this study. The effects of Na2S2O8 concentration, Fe3O4 addition, ultrasonic power, initial concentration and initial pH on the degradation of tetracycline were investigated. The results showed that tetracycline removal rate increased with the increase of Fe3O4 dosage, but decreased with the increase of initial pH and initial tetracycline concentration. With the optimum values of Na2S2O8 concentration and ultrasound power, the highest degradation rate can be achieved. The scavenging effect was examined by using ethanol, tert-butyl alcohol and 1,4-benzoquinone to evaluate the roles of sulfate radicals, hydroxyl radicals and superoxide radicals. The results indicated that sulfate radicals and the hydroxyl radicals played important roles in the degradation of tetracycline by Fe3O4/Na2S2O8/US process. (C) 2011 Published by Elsevier B.V.