| Autor: |
Chiu Wen Chen, Cheng-Di Dong, Chang-Mao Hung, Nguyen Thanh Binh, Yi Kuo Chang |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Advanced Materials Research. :380-383 |
| ISSN: |
1662-8985 |
| DOI: |
10.4028/www.scientific.net/amr.1044-1045.380 |
| Popis: |
The oxidation of 16 polycyclic aromatic hydrocarbons compounds (PAHs) in sediments by sodium persulfate (Na2S2O8) activated by temperature and nanoscale zero−valent iron (nZVI) as the source of catalytic ferrous iron was investigated. The effect of various controlling factors including S2O82− (0.017–170 g/L), nZVI (0.01–1 g/L), and temperature (50–70°C) were performed. The efficiency to remove PAHs was not too high as 10.7–39.1% for unactivated persulfate. Results from experiments indicate that increasing temperature or the addition of nZVI into a persulfate-slurry system could enhance the persulfate oxidation process. The best removal efficiency (86.3%) was attained after 24 hr while adding nZVI (0.5 g/L) to persulfate (170 g/L) at temperature of 25°C. The results of our study suggest that nZVI assisted persulfate oxidation without elevating temperature is a suitable and economic alternative for the ex–situ treatment of PAHs contaminated sediments. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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