Serine Grafted Silica Coated Nanoscale Zero‐Valent Iron with Enhanced Fenton‐Like Degradation of Mixed Organic Solvents of Tributyl Phosphate and n‐dodecane
Year: 2025
Type: article
Abstract: As global nuclear energy scales up, the annual output of low‐to‐medium‐level radioactive tributyl phosphate (TBP) and n‐dodecane organic solvents from spent fuel processing grows. To address this problem, the serine grafted silica coated nanoscale zero‐valent iron (Ser‐SiO 2 @nZVI) is synthesized and used as a Fenton‐like catalyst. Ser‐SiO 2 @nZVI is analyzed through various characterization techniques. The catalytic oxidation performance of Ser‐SiO 2 @nZVI in the Fenton‐like system is evaluated. The effects of catalyst type, temperature, catalyst dosage, H 2 O 2 concentration and H 2 SO 4 concentration on the degradation of organic solvents are optimized. Nuclear isotope simulation experiments proved that the presence of nuclides do not affect the degradation efficiency, and more than 90% of the nuclides remained in the reaction vessel. Electron spin resonance (ESR) results indicated that the Ser‐SiO 2 @nZVI/H 2 O 2 system produced more hydroxyl radicals than the nZVI/H 2 O 2 system. Density functional theory (DFT) calculations further suggested that the catalytic performance of Ser‐SiO 2 @nZVI is higher, and the adsorption energy between Ser‐SiO 2 @nZVI and TBP/n‐dodecane is greater, making it more likely to adsorb organic solvents on the catalyst surface. This research provides a theoretical basis for the modification of iron‐based materials and their application in the treatment of low‐to‐medium radioactive organic solvents.
Source: Advanced Science
Authors: Peijie Sun, Haifeng Xu, Lejin Xu
Institution: Huazhong University of Science and Technology
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,730
Award: G2193872096
OpenAlex ID: W4413101652