摘要
研究了UV/H2O2/草酸高铁铵体系下孔雀绿(Malachite green,MG)光降解过程中的影响因素,包括MG的初始浓度、初始pH值、投加H2O2浓度和草酸高铁铵浓度等。结果表明:MG初始浓度越低光降解越快,碱性条件有利于MG的降解,其最佳降解pH为11.0;随H2O2浓度的增加,MG降解率先增加后减少,在100mmol/L时,降解率最高;MG降解率随草酸高铁铵浓度增加而增加,于10.0mmol/L时MG降解率最高;UV/H2O2/草酸高铁铵体系的降解效果较强,交叉实验结果表明H2O2:草酸高铁铵浓度比在1～20:1时降解率均高于。因此该体系具有快速、简单、经济并高效率等特点,可应用于染料废水的降解和脱色工艺中。
In this paper, the influence factors of photodegradation of Malachite Green （MG） in UV/H2O2/Ammonium ferric oxalate systems were studied, which included initial concentration of MG, H2O2 and ammonium ferric oxalate, and initial pH. The experimental results indicated that the degradation efficiency of MG decreased with increasing initial concentration of MG, MG showed higher degradation efficiency in alkaline medium than that of in acid medium, and the optimum pH was 11.0; Furthermore, the degradation efficiency of MG increased at first and then decreased with increasing of H2O2 concentration; With increasing the ammonium ferric oxalate concentration, the degradation efficiency of MG was also increased. Therefore, the optimum H2O2 concentration was 100mmol/L and the optimum ammonium ferric oxalate concentration was 10.0mmol/L, respectively. Additionally, the cross-over experiments showed that when H2O2： ammonium ferric oxalate concentration was in the range of 1～20：1, UV/H2O2/ammonium ferric oxalate system got relatively higher degradation efficiency of over than 90%. The above results suggested that UV/H2O2/ammonium ferric oxalate system was fast, simple, economical and effective, which can be applied to the degradation and decolorization of other dye wastewater treatment.
出处
《环境保护科学》
CAS
2012年第1期5-9,共5页
Environmental Protection Science
基金
国家自然科学基金项目(21167012)
内蒙古自治区高等学校科学研究项目(NJZY11038)
关键词
草酸高铁铵
过氧化氢
孔雀石绿
染料
光降解
Ammonium Ferric Oxalate
Hydrogen Peroxide
Malachite Green
Dye
Photodegradation
