Sustainable Reuse of Char Waste for Oil Spill Recovery Foams
2020
Piperopoulos, E. | Calabrese, L. | Mastronardo, E. | Proverbio, E. | Milone, C.
The aim of this work is the employment of char waste in the synthesis of silicon foams for oil spill remediation and the comparison analysis with carbon nanotubes-filled foams. The foams are obtained by foaming a slurry constituted by a silicone matrix with CNT or char filler (7.7 wt%) in presence of a Sn-based catalyst. All the investigated materials present a foam morphology with an open/closed cell structure. Each foam was tested in three used common oils (kerosene, crude oil, and pump oil). Also, hydrophilic behavior of the foam was investigated. CNT showed a 700% sorption capacity in light oils (almost 7 gₒᵢₗ/gfₒₐₘ in kerosene); on the contrary, char foam evidenced the higher sorption efficiency in heavier oils; in particular, it reaches 130% in pump oil (1.3 gₒᵢₗ/gfₒₐₘ). All the filled foams are reusable. The reuse increases the foam efficiency and decreases the economic and environmental impacts.
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