Sakti, Satya Candra Wibawa and Indrasari, Nindayu and Wijaya, Rizki Ainuna and Fahmi, Mochamad Zakki and Widati, Alfa Akustia and Lee, Hwei Voon and Fujioka, Takahiro and Nuryono, - and Chen, Chun-Hu (2022) Diatomaceous earth incorporated floating magnetic beads for oil removal on water. Environmental Technology & Innovation, 25. ISSN 2352-1864, DOI https://doi.org/10.1016/j.eti.2021.102120.
Full text not available from this repository.Abstract
Water contamination by oil spills causes severe damage to the environment and human health. Oil adsorbents should be buoyant, effective oil-contact, and regenerable. In this study, diatomaceous-earth (DE)-incorporated magnetic alginate (Alg)-based beads, chemically modified to include phthalic or maleic anhydride (denoted as Alg/DE/Fe3O4 PA and Alg/DE/Fe3O4 -MA), were developed. Internal cavities, formed by cavity-forming agents, made them buoyant. The beads were buoyant and magnetically responsive for 30 days. Maximum oil adsorption capacities of Alg/DE/Fe3O4 -PA and Alg/DE/Fe3O4 MA were 29.7 and 21.0 times their weights, respectively. The pseudo-second order kinetics model (R-2 similar to 0.999, ARE <= 1.088, and chi(2) <= 0.041) and Freundlich isotherm model (R-2 similar to 0.999, ARE <= 0.1, and chi(2) <= 3.37x 10(-3)) were used to determine these values. Both beads were magnetically regenerable for up to 20 cycles. DE pores improved oil adsorption capacity by facilitating intra-bead diffusion of surface adsorbed oil. This was confirmed by micro-structural characterization using surface micrographs, elemental distribution, porosity, thermal stability, crystalline phases, molecular vibrational behavior, and magnetic properties. Scanning electron microscopy and X-ray diffractometry analyses revealed spherical beads with well-distributed Fe3O4 spinel on the surfaces. The two adsorbent beads satisfied the criteria for oil-removal from water: buoyancy, high affinity towards various oil types, and magnetic re-collectability. (C) 2021 The Author(s). Published by Elsevier B.V.
| Item Type: | Article |
|---|---|
| Funders: | None |
| Uncontrolled Keywords: | Alginate; Diatomaceous earth; Magnetic separation; Oil spill; Buoyancy; Water purification |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QR Microbiology |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 18 Sep 2023 01:19 |
| Last Modified: | 27 Nov 2024 02:43 |
| URI: | http://eprints.um.edu.my/id/eprint/43053 |
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