Highly elastic aerogel derived from spent coffee grounds as oil removal adsorbent

In the face of increasing environmental pollution, aerogels have emerged as valuable materials for potential oil/water separation. However, many of the currently developed aerogels have unsatisfactory compressibility, high cost and a single hydrophobic modification method, which limits larger-scale...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2022, 39(6), 267, pp.1517-1523
Main Authors: Chen, Yongli, Cai, Weijie, Zhang, Meng, Xie, Meiying, Tan, Fengzhi, Yang, Fan
Format: Article
Language:English
Subjects:
Aerogels
Biodegradability
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Coffee
Compressibility
Environmental Engineering
Hydrophobicity
Industrial Chemistry/Chemical Engineering
Industrial wastes
Materials Science
Oil spills
Separation
Sodium alginate
Wastewater
Zirconium
화학공학
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Summary:In the face of increasing environmental pollution, aerogels have emerged as valuable materials for potential oil/water separation. However, many of the currently developed aerogels have unsatisfactory compressibility, high cost and a single hydrophobic modification method, which limits larger-scale application. In this work, a type of aerogel with compressible, inexpensive, and fully biodegradable features was designed via a novel zirconium chloride modification strategy. Typically, a series of aerogels (HCSW-1, HCSW-2, and HCSW-3) were readily prepared from a mixture of spent coffee grounds, waste paper and sodium alginate. The prepared aerogels exhibited good elasticity, low density (0.024 g cm −3 ), high porosity (98.3%), efficient oil/water separation and good oil uptake (23-44 times of its weight). In addition, the as-prepared aerogels can be easily recycled several times, thus meeting the demand of actual oil/water separation. Such prominent results provide a new perspective for the development of efficient hydrophobic aerogels in the treatment of offshore oil spills and industrial wastewater.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-021-1052-5