Highly effective and reusable Ni-Al oxide/ZnCoFeO superparamagnetic aerogel for oil-water separation.

Chemosphere

Water Pollution Research Department, National Research Centre, 33 El Buhouth St., Dokki, 12622, Giza, Egypt. Electronic address:

Published: May 2024

AI Article Synopsis

  • Oily wastewater from the oil industry and spills poses a significant environmental issue, prompting research for effective solutions.
  • A novel magnetic Ni-Al oxide/ZnCoFO mesoporous aerogel (MNA) was developed as a selective adsorbent for oil removal, with oleic acid (OA) enhancing its hydrophobic properties more effectively than Triton X-100 (TX).
  • The MNA-OA exhibited a remarkable oil removal efficiency of about 97% and maintained high stability and reusability across five uses, thanks to the strong chemical bonding of OA.

Article Abstract

Oily wastewater from the oil industry and oil spill accidents has become a serious environmental problem and has attracted worldwide attention. The present study reports on the successful preparation of a novel magnetic Ni-Al oxide/ZnCoFO mesoporous aerogel (MNA) as a highly selective adsorbent for oil removal from water. Oleic acid (OA) and Triton X-100 (TX) were used as hydrophobic agents for MNA surface modification. It was found that the attached amount of OA on the mesoporous MNA aerogel is 3.5 times larger than that of TX, giving an advantage to MNA-OA in oil separation. The MNA-OA displayed superhydrophobicity (contact angle ∼150°) and superparamagnetism properties that allowed the adsorbent to be used selectively for oil removal. The MNA-OA was found to have a high oil removal efficiency of ∼97% with an adsorption capacity of ∼2 g/g. Furthermore, the produced magnetic adsorbent has high stability due to the strong chemical binding of OA, which is demonstrated by its good reusability performance. Throughout five separate runs, the MNA-OA was shown to be a very efficient and reusable adsorbent for oily wastewater.

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http://dx.doi.org/10.1016/j.chemosphere.2024.141668DOI Listing

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