Remediation of heavy hydrocarbon impacted soil using biopolymer and polystyrene foam beads
| Autor: | Roopa Kamath, Kurt D. Pennell, Kevin McVey, Nicholas M. Wilton, Bonnie A. Lyon-Marion, Albert Robbat |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Sorbent Environmental remediation Health Toxicology and Mutagenesis 0211 other engineering and technologies Fraction (chemistry) 02 engineering and technology 010501 environmental sciences engineering.material 01 natural sciences chemistry.chemical_compound Biopolymers Environmental Chemistry Soil Pollutants Waste Management and Disposal Environmental Restoration and Remediation 0105 earth and related environmental sciences 021110 strategic defence & security studies Chemistry Soil classification Pulp and paper industry Pollution Soil contamination Hydrocarbons Soil water engineering Polystyrenes Total petroleum hydrocarbon Biopolymer |
| Zdroj: | Journal of hazardous materials. 349 |
| ISSN: | 1873-3336 |
| Popis: | A green chemistry solution is presented for the remediation of heavy hydrocarbon impacted soils. The two-phase recovery system relies on a plant-based biopolymer, which releases hydrocarbons from soil, and polystyrene foam beads, which recover them from solids and water. The efficiency of the process was demonstrated by comparisons with control experiments, where water, biopolymer, or beads alone yielded total petroleum hydrocarbon (TPH) reductions of 25%, 52%, and 58%, respectively, compared to 94% when 1.25 mL of 1% biopolymer and 15 mg beads per gram of soil were agitated for 30 min. Reductions in TPH content were substantial regardless of soil fraction, with removals of 97%, 91%, and 75% from sand, silt, and clay size fractions, respectively. Additionally, treatment efficiency was independent of carbon number, C13 to C43, as demonstrated by reductions in both diesel fuel (C13–C28) and residual-range organics (C25–C43) of ∼90%. Compared to other published polymer- and surfactant-based treatment methods, this system requires less mobilizing agent, sorbent, and mixing time. The remediation process is both efficient and sustainable because the biopolymer is re-useable and sourced from renewable crops and polystyrene beads are obtained from recycled materials. |
| Databáze: | OpenAIRE |
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