柠檬酸螯合Fe(Ⅲ)活化过硫酸盐降解活性艳红X-3B

摘要

文章研究了柠檬酸螯合Fe(Ⅲ)活化过硫酸盐体系对水中活性艳红X-3B的降解效果.考察了过硫酸盐浓度、Fe(Ⅲ)/柠檬酸(CA)、pH及阴离子(NO3-、NO2-、HCO3-、Cl-)对X-3B降解效果的影响,并研究体系中产生自由基的贡献率.结果表明,过硫酸盐浓度为0.2 mmol/L时,X-3B降解率最大;X-3B的降解率随Fe(Ⅲ)/CA增大而增大;pH的增大不利于X-3B的降解;无机阴离子的加入抑制X-3B的降解.·OH和SO4·-在光解过程中的贡献率分别为58％和31％.%The degradation effect of citric acid chelated Fe (Ⅲ) activated persulfate system on reaction brilliant red X-3B has been researched. The effects of the concentration of persulfate,ratio of Fe(Ⅲ)/citric acid(CA),pH and anions(NO3-、NO2-、HCO3-、Cl-) on X-3B degradation have been investigated,and the contribution rate of free radicals produced in the system has been studied. The results show that when the concentration of persulfate is 0.2 mmol/L , the degradation rate of X-3B is the highest. The degradation rate of X-3B increases with the increase of ratio of Fe (Ⅲ)/CA. The increase of pH is not advantageous to the degradation of X-3B. The addition of inorganic anions inhibits the degradation of X-3B. The contribution rates of ·OH and SO4·-in the process of photolysis are 58％and 31％,respectively.