摘要
采用自制的针铁矿(α-FeOOH)为催化剂,以 H_2O_2为氧化剂,催化降解废水中的罗丹明 B 染料。实验结果表明,在α-FeOOH 质量浓度为1g/L、H_2O_2体积分数为3%、pH 为13、反应时间为180 min、反应温度为15℃的条件下,质量浓度为1 000 mg/L 的罗丹明 B 染料废水的脱色率达99.20%。α-FeOOH 和 H_2O_2混合体系处理罗丹明 B 染料废水的表观动力学方程可近似为一级反应,25℃时反应速率常数为0.078 13 min^(-1),表观活化能为91.64 kJ/mol。
Catalytic degradation of simulated rhodamine B in wastewater was investigated using self- synthesized goethite （α-FeOOH） as catalyst and hydrogen peroxide as oxidation agent. The decoloration rate of the wastewater is 99.20% when the initial mass concentration of rhodamine B is 1 000 mg/L, the dosage of goethite is 1 g/L and that of hydrogen peroxide is 3% （volume fraction）, pH is 13, reaction time is 3 h, reaction temperature is 15 ℃. The kinetics studies of the catalytic reaction show that the removal of rhodamine B nearly follows the first-order reaction, the reaction rate constant is 0. 07813 min^-1, and the apparent activation energy is 91.64 kJ/mol at 25 ℃.
出处
《化工环保》
CAS
CSCD
北大核心
2008年第5期396-400,共5页
Environmental Protection of Chemical Industry
关键词
针铁矿
罗丹明B
催化氧化
动力学
废水处理
goethite
rhodamine B
catalytic oxidation
kinetics
wastewater treatment
