Removal of Hydrocarbons from Contaminated Soils by Using a Thermally Expanded Graphite Sorbent
| Autor: | Stefania Calace, Donatella Caniani, Salvatore Masi, Marianna Caivano, G. Mazzone, Michele Greco, Ignazio Marcello Mancini |
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| Rok vydání: | 2018 |
| Předmět: |
Sorbent
Hot Temperature Soil test Environmental remediation Health Toxicology and Mutagenesis 02 engineering and technology 010501 environmental sciences Toxicology 01 natural sciences Soil Adsorption Soil Pollutants Graphite Environmental Restoration and Remediation 0105 earth and related environmental sciences Pollutant General Medicine Contamination 021001 nanoscience & nanotechnology Pulp and paper industry Pollution Hydrocarbons Soil water Environmental science 0210 nano-technology Environmental Pollution |
| Zdroj: | Bulletin of environmental contamination and toxicology. 101(6) |
| ISSN: | 1432-0800 |
| Popis: | Lab-scale experiments on three soil matrices featured by increasing granulometry (sea sand, silica sand and gravel) were carried out in order to evaluate the adsorption capability and the removal efficiency of a new graphene-based material. Soil samples, firstly contaminated with different quantities of used lubricant oil up to final concentrations of 12.5, 25.0, 50.0 g kg−1, were treated with an opportune amount of thermally expanded graphite (TEG) (i.e. 1/10, 1/20, 1/40 as TEG/pollutant ratio). Results show that the removal efficiency of TEG is directly correlated to the contamination level of the soil. The best removal efficiency (87.04%) was obtained during the treatment of gravel samples at the maximum contamination level by using the highest dosage of TEG. A good removal efficiency (80.83%) was also achieved using lower TEG/pollutant ratio. Moreover, TEG at ratio 1/10 showed worse removal efficiencies in treating sea (81.17%) and silica sand (63.52%) than gravel. In this study, also the thermal regeneration was investigated in order to evaluate a possible reuse of TEG with subsequent technical and economic advantages. TEG-technique proves to be technologically and economically competitive with other currently used technologies, revealing the best choice for the remediation of hydrocarbon-contaminated soils. |
| Databáze: | OpenAIRE |
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