Yang Mei-Mei, Zhou Shao-Qi, Liu Dan, Zheng Ke
College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, China.
Huan Jing Ke Xue. 2013 Mar;34(3):962-7.
The oxidation degradation of orange G (OG) in aqueous solutions by the activated carbon catalyzed peroxydisulfate (PDS) has been kinetically investigated. These processes are based on the generation of sulfate radicals, which are powerful oxidizing species found in nature. The results demonstrated that OG could be degraded by GAC/PDS reagent effectively. Moreover, the dosage of PDS and GAC, temperature and initial concentration of OG had an impact on OG oxidation, higher temperature and GAC dosage resulted in higher OG degrading rates. In addition, the empirical kinetic equation for OG oxidation by GAC/PDS combined system under the conditions of 0.050-0.125 mmol x L(-1) of OG, 5.0 of pH, 10/1-160/1 of n(PDS)/n(OG), 0.1-1.6 g x L(-1) of GAC, 298-338 K of temperature, could be reasonably represented by the first order kinetics, which was fitted very well with the experimental data. In addition, the catalytic properties of reused GAC have been investigated.
对活性炭催化过二硫酸盐（PDS）氧化水溶液中橙黄G（OG）的过程进行了动力学研究。这些过程基于硫酸根自由基的产生，硫酸根自由基是自然界中存在的强氧化性物质。结果表明，GAC/PDS试剂能有效降解OG。此外，PDS和GAC的用量、温度以及OG的初始浓度对OG氧化有影响，较高的温度和GAC用量导致较高的OG降解率。另外，在OG浓度为0.050 - 0.125 mmol·L⁻¹、pH为5.0、n(PDS)/n(OG)为10/1 - 160/1、GAC浓度为0.1 - 1.6 g·L⁻¹、温度为298 - 338 K的条件下，GAC/PDS联合体系氧化OG的经验动力学方程可用一级动力学合理表示，且与实验数据拟合良好。此外，还研究了再生GAC的催化性能。
