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Diatomaceous earth incorporated floating magnetic beads for oil removal on water

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 ma...

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Main Authors:	Sakti, Satya Candra Wibawa, Indrasari, Nindayu, Wijaya, Rizki Ainuna, Fahmi, Mochamad Zakki, Widati, Alfa Akustia, Lee, Hwei Voon, Fujioka, Takahiro, Nuryono, -, Chen, Chun-Hu
Format:	Article
Published:	Elsevier 2022
Subjects:	GE Environmental Sciences QR Microbiology
Online Access:	http://eprints.um.edu.my/43053/
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spelling	my.um.eprints.430532023-09-18T01:19:11Z http://eprints.um.edu.my/43053/ Diatomaceous earth incorporated floating magnetic beads for oil removal on water Sakti, Satya Candra Wibawa Indrasari, Nindayu Wijaya, Rizki Ainuna Fahmi, Mochamad Zakki Widati, Alfa Akustia Lee, Hwei Voon Fujioka, Takahiro Nuryono, - Chen, Chun-Hu GE Environmental Sciences QR Microbiology 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. Elsevier 2022-02 Article PeerReviewed 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 <https://doi.org/10.1016/j.eti.2021.102120>. 10.1016/j.eti.2021.102120
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	GE Environmental Sciences QR Microbiology
spellingShingle	GE Environmental Sciences QR Microbiology Sakti, Satya Candra Wibawa Indrasari, Nindayu Wijaya, Rizki Ainuna Fahmi, Mochamad Zakki Widati, Alfa Akustia Lee, Hwei Voon Fujioka, Takahiro Nuryono, - Chen, Chun-Hu Diatomaceous earth incorporated floating magnetic beads for oil removal on water
description	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.
format	Article
author	Sakti, Satya Candra Wibawa Indrasari, Nindayu Wijaya, Rizki Ainuna Fahmi, Mochamad Zakki Widati, Alfa Akustia Lee, Hwei Voon Fujioka, Takahiro Nuryono, - Chen, Chun-Hu
author_facet	Sakti, Satya Candra Wibawa Indrasari, Nindayu Wijaya, Rizki Ainuna Fahmi, Mochamad Zakki Widati, Alfa Akustia Lee, Hwei Voon Fujioka, Takahiro Nuryono, - Chen, Chun-Hu
author_sort	Sakti, Satya Candra Wibawa
title	Diatomaceous earth incorporated floating magnetic beads for oil removal on water
title_short	Diatomaceous earth incorporated floating magnetic beads for oil removal on water
title_full	Diatomaceous earth incorporated floating magnetic beads for oil removal on water
title_fullStr	Diatomaceous earth incorporated floating magnetic beads for oil removal on water
title_full_unstemmed	Diatomaceous earth incorporated floating magnetic beads for oil removal on water
title_sort	diatomaceous earth incorporated floating magnetic beads for oil removal on water
publisher	Elsevier
publishDate	2022
url	http://eprints.um.edu.my/43053/
_version_	1778161689844252672
score	13.211869

Diatomaceous earth incorporated floating magnetic beads for oil removal on water

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