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- Title
Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics.
- Authors
Piperopoulos, Elpida; Calabrese, Luigi; Jovanovic, Vesna Stankov; Nikolic, Jelena; Ciric, Slobodan; Milone, Candida; Proverbio, Edoardo
- Abstract
The aim of this article is the synthesis and characterization of bentonite‐filled siloxane foams for oil spills recovery. Composite foams at varying filler content in the range 35–45 wt% were investigated. The sorption kinetics and capacity of composite foams in different oils (e.g., kerosene, virgin naphtha, pump oil) were assessed. As a reference, water absorption capacity was also evaluated. Among all, the composite foam filled with 40 wt% bentonite (B‐40 batch) shows the lowest affinity with water and good absorption capacity with oils (mainly light oils) reaching an absorption capacity at saturation equal to 10.3 and 518.2 wt% in water and virgin naphtha, respectively. Furthermore, isothermal absorption curves were analyzed using three kinetic models: pseudo‐first order, pseudo‐second order, and Elovich models. The equilibrium isotherm fitting results were optimal using the pseudo‐second order model, indicating that chemisorption phenomena play a key role in the speed of the absorption phase for these PDMS‐based composite foams. Finally, a correlation was addressed between morphology, foam microstructure, absorption capacity, and kinetics.
- Subjects
FOAM; OIL spills; SORPTION; OIL well pumps; NAPHTHA; BENTONITE
- Publication
Journal of Applied Polymer Science, 2022, Vol 139, Issue 41, p1
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.53003