Synthesis of granulated hydrophobic magnetic sorbents and composite sponges based on Fe3O4/Zn-Al-LDH for oil pollution removal

Мұқаба

Дәйексөз келтіру

Толық мәтін

Аннотация

In this study, we present a novel surface modification approach for magnetic composite materials based on Fe3O4/Zn-Al layered double hydroxides (LDH) to enhance their hydrophobic properties. We have systematically investigated the interaction mechanisms between various surfactants (stearate, oleate, and sodium dodecyl sulfate) and the Fe3O4/Zn-Al-LDH surface. Our research examined how ethanol-mediated hydrophobization affects the material's porous and crystalline structure. We developed innovative synthesis routes for both granulated and sponge-like magnetic sorbents utilizing melamine-formaldehyde resin as a binding matrix. Under optimized conditions, the resulting Fe3O4-LDH-ST granulated sorbents and MEL-Fe3O4/LDH-ST sponge-like materials demonstrated exceptional oil sorption capacities of 0.60 and 21.36 g/g, respectively, combined with significant magnetic susceptibility, enhanced hydrophobicity, and excellent regeneration potential. These engineered materials show promise for marine oil spill remediation and environmental monitoring applications.

Толық мәтін

Рұқсат жабық

Авторлар туралы

N. Ivanov

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

O. Shichalin

Sakhalin State University

Хат алмасуға жауапты Автор.
Email: ivanov.np@dvfu.ru
Ресей, Yuzhno-Sakhalinsk

V. Rastorguev

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

V. Zakharenko

Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

A. Myagchilov

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

P. Marmaza

Sakhalin State University

Email: ivanov.np@dvfu.ru
Ресей, Yuzhno-Sakhalinsk

Ya. Zernov

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

S. Pisarev

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

I. Buravlev

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

E. Papynov

Far Eastern Federal University

Email: ivanov.np@dvfu.ru
Ресей, Vladivostok

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2. Fig. 1. Diffraction patterns of the original and modified granulated sorption materials based on Fe3O4/Zn-Al-LDH.

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3. Fig. 2. Differential curves of pore size distribution in the original and modified granular sorption materials based on Fe3O4/Zn-Al-LDH.

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4. Fig. 3. SEM images and EDS maps of the elemental distribution over the surface of the original and modified granular sorption materials: a – Fe3O4/SDG, b – Fe3O4/SDG-OL-0.01, Fe3O4/SDG-ST-0.01, Fe3O4/SDG-DOD-0.01.

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5. Fig. 4. Sorption capacity in relation to oil, motor oil and water for the original and modified granulated sorption materials based on Fe3O4/Zn-Al-LDH.

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6. Fig. 5. Water contact angles for spongy hydrophobic magnetic composites: a – MEL-Fe3O4/SDG-OL-0.01, b – MEL-Fe3O4/SDG-OL-0.05.

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7. Fig. 6. Sorption capacity in relation to oil, motor oil and water for the original and modified spongy sorption materials MEL-Fe3O4/SDG.

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8. Fig. 7. Sorption indices in relation to oil in multiple adsorption–desorption cycles for modified granular sorption materials MEL-Fe3O4/SDG-OL-0.01 and -0.05.

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9. Fig. 8. Sorption indices in relation to oil in multiple adsorption–desorption cycles for modified spongy sorption materials MEL-Fe3O4/SDG-OL-0.01: a – sorption capacity, b – water contact angle after five cycles.

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10. Fig. 9. Proposed mechanism of surface hydrophobization of LDH using the example of interaction with sodium stearate.

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