Recycled cyanobacteria ashes for sono-enhanced photo-Fenton wastewater decontamination

Artal, Raül; Philippe, Laëtitia; Gómez, Elvira; Serrà, Albert

doi:10.1016/j.jclepro.2020.121881

Cited by 16 publications

(1 citation statement)

References 45 publications

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“…Meanwhile, the iron sludge produced in the Fenton reaction is di cult to remove. To solve these problems above, photo-Fenton techniques [9,10], electric-Fenton techniques [11][12][13], and microwave-Fenton techniques [14,15] have been developed. Photo-Fenton technology is based on Fenton and photocatalytic reactions, which are advanced oxidation processes (AOPs) and are carried out with the energy provided by visible light [16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PANI@α-Fe2O3/Al2O3 photo-Fenton composite for the enhanced efficient methylene blue removal

Yan,

Liang,

Liu

et al. 2023

J Sol-Gel Sci Technol

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In this work, β-FeOOH precursors were grown on at Al 2 O 3 ceramic matrix by a hydrothermal-assisted solgel composite method, followed by heat treatment to obtain α-Fe 2 O 3 /Al 2 O 3 photo-Fenton catalysts. The effect of heat treatment temperature on the microstructure and photo-Fenton performance of α-Fe 2 O 3 /Al 2 O 3 photo-Fenton catalysts was studied emphatically. The PANI@α-Fe 2 O 3 /Al 2 O 3 photo-Fenton composite (PFA-550) were obtained by coating polyaniline (PANI) on the optimized α-Fe 2 O 3 /Al 2 O 3 (FA-550) surface via in-situ polymerization, and subsequently used as an anode to assemble a photo-Fenton reactor for the removal of methylene blue (MB). The effect of pH value and applied electric eld on MB removal of the photo-Fenton reactor was investigated. It was shown that α-Fe 2 O 3 nanotubes was uniformly distributed over the surface of the at Al 2 O 3 ceramic in the FA-550 heated at 550°C, which exhibited high photo-Fenton activity. Compared to FA-550, PFA-550 exhibit superior photo-Fenton activity. In addition, PFA-550 have excellent photo-Fenton activity in a wide pH range (pH=3.92~9.21) rather than narrow range (pH=2.0~3.5) in conventional Fenton reaction. The migration of photogenerated electrons(e -) were promoted by external electric eld from the surface of PFA-550 to the counter electrode. The removal rate of MB was substantially increased with the effective improvement of the separation of photogenerated e --h + . Highlight β-FeOOH/Al 2 O 3 was synthesized using a hydrothermal-assisted sol-gel composite method. α-Fe 2 O 3 nanorods and nanotubes were formed by heating β-FeOOH precursors covered on Al 2 O 3 ceramic matrix. PANI@α-Fe 2 O 3 /Al 2 O 3 were obtained by coating polyaniline (PANI) on the optimized α-Fe 2 O 3 /Al 2 O 3 surface. PANI@α-Fe 2 O 3 /Al 2 O 3 photo-Fenton composite exhibited excellent photo-Fenton activity over a wide pH range.The photo-Fenton activity of PANI@α-Fe 2 O 3 /Al 2 O 3 was increased under both visible light and an applied electric eld.

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