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Số người truy cập: 112,298,152

 Carbon Felt Monoliths Coated with a Highly Hydrophobic Mesoporous Carbon Phase for the Continuous Oil Sorption/Filtration from Water
Tác giả hoặc Nhóm tác giả: Housseinou Ba, Yuefeng Liu, Wei Wang, Cuong Duong-Viet, Vasiliki Papaefthimiou, Lam Nguyen-Dinh, Giulia Tuci, Giuliano Giambastiani, and Cuong Pham-Huu
Nơi đăng: Advanced Sustainable Systems; Số: DOI: 10.1002/adsu.201800040;Từ->đến trang: 1800040 (1-9);Năm: 2018
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The recovery of oils and organic compounds is a key challenge in wastewaterpurifcation processes. Herein the authors describe a straightforward andeasy-to-scale-up strategy for the fabrication of lightweight and highly hydrophobic composites with superior mechanical strength, through the coating of commercial carbon felt (CF) with a thin mesoporous carbon phase (MC). Composites are prepared by a dip-coating method starting from CF foams to be soaked in a water/ethanol solution of food-grade components before undergoing two successive thermal treatments. They exhibit an extremely high effciency and complete reusability in the recovery of oils and organic compounds from wastewaters both as classical absorbents under batch conditions or flters under continuum separation mode. Notably, the electrical conductivity/resistivity of composites has allowed their application to the recovery of water floating waxy organic residues. Indeed, absorbents can be heated up by the passage of an electrical current (DC) thus allowing semi-solid organic pollutants to be melted and absorbed by the hydrophobic composite without sorbent fouling or deactivation. The outlined strategy towards cheap and scalable lightweight hydrophobic materials for wastewater cleaning and environmental remediation from oil spilling, is a highly attractive technology that offers concrete hints to the exploitation of these composites at industrial level
ABSTRACT
The recovery of oils and organic compounds is a key challenge in wastewaterpurifcation processes. Herein the authors describe a straightforward andeasy-to-scale-up strategy for the fabrication of lightweight and highly hydrophobic composites with superior mechanical strength, through the coating of commercial carbon felt (CF) with a thin mesoporous carbon phase (MC). Composites are prepared by a dip-coating method starting from CF foams to be soaked in a water/ethanol solution of food-grade components before undergoing two successive thermal treatments. They exhibit an extremely high effciency and complete reusability in the recovery of oils and organic compounds from wastewaters both as classical absorbents under batch conditions or flters under continuum separation mode. Notably, the electrical conductivity/resistivity of composites has allowed their application to the recovery of water floating waxy organic residues. Indeed, absorbents can be heated up by the passage of an electrical current (DC) thus allowing semi-solid organic pollutants to be melted and absorbed by the hydrophobic composite without sorbent fouling or deactivation. The outlined strategy towards cheap and scalable lightweight hydrophobic materials for wastewater cleaning and environmental remediation from oil spilling, is a highly attractive technology that offers concrete hints to the exploitation of these composites at industrial level
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