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Solar-heated graphene sponge for high-efficiency clean-up of viscous crude oil spill.
- Source :
-
Journal of Cleaner Production . Sep2019, Vol. 230, p995-1002. 8p. - Publication Year :
- 2019
-
Abstract
- A solar-driven self-heated sponge was developed as a novel sorbent to achieve fast collection of crude oil from spills by taking advantage of light-to-heat conversion to significantly reduce oil viscosity. The sorbent was fabricated via facile dip-coating reduced graphene oxide on a commercial melamine sponge. The photothermal effect of sorbent on absorption of crude oil was investigated through infrared thermal imaging, permeating behavior of crude oil droplet and absorption-recovery of crude oil. The results indicated that the graphene sponge revealed an outstanding light-to-heat conversion capability and stability with almost full absorption (∼98%) of sunlight. The surface temperature spontaneously increased to as high as 89 °C under one sun simulated irradiation (1.0 kW/m2) at room temperature (30 °C), which subsequently reduced the in situ viscosity of the crude oil by over two orders of magnitude. As a result, the absorption time was reduced by approximately 86% for a solar-heating sponge under one sun illumination compared with that of the sponge without light illumination. In addition, the consecutive recovery rate for pumping-driven crude oil clean-up from seawater under one sun illumination was 12 times faster than that of the sponge without light illumination. The proposed solar responsive sorbent design represents a sustainable approach to address the problem of remediation of viscous crude oil spills. Image 1 ● A solar-heated hydrophobic sorbent was fabricated for crude oil absorption. ● The sorbent revealed an outstanding light-to-heat conversion capability. ● The sorbent could efficiently recover crude oil by reduced viscosity under sunlight. ● Pumping-driven consecutive recovery was 12 times faster than that without sunlight. ● Solar-heated sorbent could be potentially used for crude oil spills remediation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PETROLEUM
*OIL spills
*HEAVY oil
*PHOTOTHERMAL effect
*THERMOGRAPHY
*GRAPHENE oxide
Subjects
Details
- Language :
- English
- ISSN :
- 09596526
- Volume :
- 230
- Database :
- Academic Search Index
- Journal :
- Journal of Cleaner Production
- Publication Type :
- Academic Journal
- Accession number :
- 137094280
- Full Text :
- https://doi.org/10.1016/j.jclepro.2019.05.178