Pyrene removal from contaminated soils by modified Fenton oxidation using iron nano particles
| Autor: | Ghasemali Mohebali, Sahand Jorfi, Nemat Jaafarzadeh, Abbas Rezaee |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Contaminated soils
Environmental Engineering Modified fenton oxidation Chemistry Soil pollution Pyrene Iron nano oxide Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Nanoparticle Pollution Applied Microbiology and Biotechnology Soil contamination Fenton oxidation chemistry.chemical_compound Chemical engineering Nano Particle Chelation Waste Management and Disposal Research Article Chelating agent Water Science and Technology |
| Zdroj: | Journal of Environmental Health Science and Engineering |
| ISSN: | 2052-336X |
| DOI: | 10.1186/2052-336x-11-17 |
| Popis: | Background The problems related to conventional Fenton oxidation, including low pH required and production of considerable amounts of sludge have led researchers to investigate chelating agents which might improve the operating range of pH and the use of nano iron particle to reduce the excess sludge. The pyrene removal from contaminated soils by modified Fenton oxidation at neutral pH was defined as the main objective of the current study. Methods Varying concentrations of H2O2 (0-500 mM) and iron nano oxide (0-60 mM), reaction times of 0.5-24 hours and variety of chelating agents including sodium pyrophosphate, sodium citrate, ethylene diamine tetraacetic, fulvic and humic acid were all investigated at pyrene concentration levels of 100 – 500 mg/kg. Results By applying the following conditions (H2O2 concentration of 300 mM, iron nano oxide of 30 mM, sodium pyrophosphate as chelating agent, pH 3 and reaction time of 6 hours) the pyrene removal efficiency at an initial concentration of 100 mg/kg was found to be 99%. As a result, the pyrene concentration was reduced from 100 to 93 mg/kg once the above optimum conditions are met. Conclusions In this research, the modified Fenton oxidation using iron nano oxide at optimum conditions is introduced as an efficient alternative method in lab scale for chemical remediation or pre-treatment of soils contaminated by pyrene at neutral pH. |
| Databáze: | OpenAIRE |
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