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- Title
Remediation of Anthracene-Contaminated Soil by ClO in the Presence of Magnetic FeO-CuO@Montmorillonite as Catalyst.
- Authors
Ma, Yulin; Gu, Na; Gao, Jinlong; Wang, Kuitao; Wu, Yunxia; Meng, Xiaoyu
- Abstract
FeO-CuO@montmorillonite was prepared using coprecipitation method, and its structure was determined by XRD, IR, and transmission electron micrograph (TEM). Montmorillonite in FeO-CuO@montmorillonite nanocomposite allowed the silicate layer of montmorillonite to behave as a barrier, which prevented the agglomeration and natural crystallization of FeO and CuO. Furthermore, the chlorine dioxide (ClO) oxidative degradation of anthracene-contaminated soil was studied in detail using FeO-CuO@montmorillonite as a magnetic heterogeneous catalyst. The operating parameters such as ClO concentration, catalyst dosage, reaction time, and pH were evaluated. Compared with the conventional ClO oxidation process without the catalyst, the ClO catalytic oxidation system could significantly enhance the degradation efficiency. Under the optimal condition (anthracene concentration 89.8 mg/kg, water soil mass ratio 3:1, initial pH 7, ClO concentration 1 mol/kg, catalyst dosage 1 g/kg, reaction time 30 min, and reaction temperature 25 °C), anthracene degradation efficiency achieved 96.2 %. The catalyst could be easily reused by magnetic separation and used at least 8 cycles without obvious loss of activity. The kinetic studies revealed that the ClO catalytic oxidation degradation of anthracene-contaminated soil with FeO-CuO@montmorillonite as catalyst followed pseudo-first-order kinetics with respect to ClO concentration. Thus, this study showed potential application of ClO catalytic oxidation process in remediation of organic pollutant-contaminated soil.
- Subjects
SOIL remediation; ANTHRACENE; POLYCYCLIC aromatic hydrocarbons; CHLORINE dioxide; CATALYTIC oxidation; MONTMORILLONITE catalysts
- Publication
Water, Air & Soil Pollution, 2016, Vol 227, Issue 9, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-016-3008-7