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Optimization of spent radioactive resins degradation by Fenton‐like oxidation using response surface methodology
Author(s) -
Wan Zhong,
Wang Jianlong
Publication year - 2016
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12392
Subject(s) - response surface methodology , degradation (telecommunications) , catalysis , chemistry , quadratic model , nuclear chemistry , box–behnken design , materials science , chromatography , organic chemistry , telecommunications , computer science
The degradation of spent radioactive resin by Fenton‐like process with Cu 2+ as catalyst was optimized using response surface methodology (RSM) based on Box–Behnken design (BBD) method. The influence of three independent variables like catalyst concentration, H 2 O 2 dosage, and initial pH value on resin degradation was investigated. The weight loss percentage of resin was evaluated using the quadratic model. Analysis of variance showed that correlation coefficient (R 2 ) of the model was 0.9786, providing a satisfactory approximation of quadratic model with the experimental data. Out of three factors, especially pH value had significant influence on the weight loss percentage of resin. The weight loss percentage increased as pH decreased from 2.25 to 0.75. The conditions for resin degradation were optimized as follows: pH = 0.75, H 2 O 2 = 20 mL, and catalyst concentration was 0.25 M. The confirmation experiment carried out at optimal conditions using RSM. The weight loss percentage was 95.80%. The predicted weight loss percentage was 96.19%, indicating that RSM based on BBD was a reliable method to optimize the operational conditions for resin degradation by Fenton‐like process. Finally, the intermediates of resin degradation were analyzed by ion chromatograph and GC‐MS. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1590–1596, 2016