实验室新闻

    科研进展

    实验室公告

    学术活动公告

 
A Mechanistic Understanding of Hydrogen Peroxide Decomposition by Vanadium Minerals for Diethyl Phthalate Degradation
 点击数:144次 添加时间:  [关闭] [收藏]

作者:Fang, GD (Fang, Guodong) ; Deng, YM (Deng, Yamei) ; Huang, M (Huang, Min); Dionysiou, DD (Dionysiou, Dionysios D.) ; Liu, C (Liu, Cun) ; Zhou, DM (Zhou, Dongmei) 

 

题目:A Mechanistic Understanding of Hydrogen Peroxide Decomposition by Vanadium Minerals for Diethyl Phthalate Degradation

 

刊物:ENVIRONMENTAL SCIENCE & TECHNOLOGY,卷: 52  期: 4  页: 2178-2185

DOI: 10.1021/acs.est.7b05303

出版年: FEB 20 2018

 

文章下载:https://pubs.acs.org/doi/ipdf/10.1021/acs.est.7b05303

 

摘要:

The interaction of naturally occurring minerals with H2O2 affects the remediation efficiency of polluted sites in in situ chemical oxidation (ISCO) treatments. However, interactions between vanadium(V) minerals and H2O2 have rarely been explored. In this study, H2O2 decomposition by various vanadium-containing minerals including V(III), V(IV), and V(V) oxides was examined, and the mechanism of hydroxyl radical ((OH)-O-center dot) generation for contaminant degradation was studied. Vanadium minerals were found to catalyze H2O2 decomposition efficiently to produce (OH)-O-center dot for diethyl phthalate (DEP) degradation in both aqueous solutions with a wide pH range and in soil slurry. Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) analyses, and free radical quenching studies suggested that (OH)-O-center dot was produced via single electron transfer from V(III)/V(IV) to H2O2 followed a Fenton-like pathway on the surface of V2O3 and VO2 particles, whereas the oxygen vacancy (OV) was mainly responsible for (OH)-O-center dot formation on the surface of V2O5 particles. This study provides new insight into the mechanism of interactions between vanadium minerals and H2O2 during H2O2-based ISCO.

 

 

 

 

 

 


 

版权所有:中国科学院南京土壤研究所 苏ICP备05004320号 地 址:江苏省南京市北京东路71号 邮编:210008 网站管理