Anti-algal activity of Fe2O3–TiO2 photocatalyst on Chlorella vulgaris species under visible light irradiation

Hamed Baniamerian, Panagiotis Tsapekos, Merlin Alvarado-Morales, Soheila Shokrollahzadeh, Maliheh Safavi, Irini Angelidaki*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Many industries located in coastal areas use a large amount of seawater. Algal biofouling can be a major problem that hinders the efficiency of these industrial facilities. In most cases, seawater requires algal removal pre-treatment to avoid or mitigate biofilm formation. To remediate green microalgae, Fe2O3–TiO2 nanoparticles with 2.5% w/w Fe2O3 were applied as a visible light driven photocatalyst. The anti-algal activity of the photocatalytic pre-treatment using green microalgae, Chlorella vulgaris was tested. The experiments were carried out in freshwater, artificial seawater, and real seawater. Effect of photocatalyst dosage, visible light intensity, and water salinity on the removal of microalgae was investigated. The highest inactivation efficiency of Chlorella vulgaris was achieved under 55 W/m2 visible light irradiation when 0.25 g/L of Fe2O3–TiO2 photocatalyst was used. The photocatalytic removal kinetics of Chlorella vulgaris followed the pseudo first order Langmuir-Hinshelwood model. The results revealed that the efficiency of photocatalytic removal of algae decreased with increasing of seawater salinity. The anti-algal activity of Fe2O3–TiO2 nanoparticles was attributed to the generation of reactive oxygen species (ROS) through the photocatalytic process. H+ radical was shown to be the most important ROS that nanoparticles produced in the aqueous media. Using Fe2O3–TiO2 nanoparticles in photocatalytic pre-treatment could be an efficient environmental-friendly method for micro-algal remediation in seawater under visible light.

Original languageEnglish
Article number125119
JournalChemosphere
Volume242
Number of pages7
ISSN0045-6535
DOIs
Publication statusPublished - 2020

Keywords

  • Biofouling
  • Chlorella vulgaris
  • Microalgae
  • Photocatalysis
  • Seawater pre-treatment
  • Visible light

Cite this

@article{672d5e283ec8403c8910c45a9273b8c4,
title = "Anti-algal activity of Fe2O3–TiO2 photocatalyst on Chlorella vulgaris species under visible light irradiation",
abstract = "Many industries located in coastal areas use a large amount of seawater. Algal biofouling can be a major problem that hinders the efficiency of these industrial facilities. In most cases, seawater requires algal removal pre-treatment to avoid or mitigate biofilm formation. To remediate green microalgae, Fe2O3–TiO2 nanoparticles with 2.5{\%} w/w Fe2O3 were applied as a visible light driven photocatalyst. The anti-algal activity of the photocatalytic pre-treatment using green microalgae, Chlorella vulgaris was tested. The experiments were carried out in freshwater, artificial seawater, and real seawater. Effect of photocatalyst dosage, visible light intensity, and water salinity on the removal of microalgae was investigated. The highest inactivation efficiency of Chlorella vulgaris was achieved under 55 W/m2 visible light irradiation when 0.25 g/L of Fe2O3–TiO2 photocatalyst was used. The photocatalytic removal kinetics of Chlorella vulgaris followed the pseudo first order Langmuir-Hinshelwood model. The results revealed that the efficiency of photocatalytic removal of algae decreased with increasing of seawater salinity. The anti-algal activity of Fe2O3–TiO2 nanoparticles was attributed to the generation of reactive oxygen species (ROS) through the photocatalytic process. H+ radical was shown to be the most important ROS that nanoparticles produced in the aqueous media. Using Fe2O3–TiO2 nanoparticles in photocatalytic pre-treatment could be an efficient environmental-friendly method for micro-algal remediation in seawater under visible light.",
keywords = "Biofouling, Chlorella vulgaris, Microalgae, Photocatalysis, Seawater pre-treatment, Visible light",
author = "Hamed Baniamerian and Panagiotis Tsapekos and Merlin Alvarado-Morales and Soheila Shokrollahzadeh and Maliheh Safavi and Irini Angelidaki",
year = "2020",
doi = "10.1016/j.chemosphere.2019.125119",
language = "English",
volume = "242",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Pergamon Press",

}

Anti-algal activity of Fe2O3–TiO2 photocatalyst on Chlorella vulgaris species under visible light irradiation. / Baniamerian, Hamed; Tsapekos, Panagiotis; Alvarado-Morales, Merlin; Shokrollahzadeh, Soheila; Safavi, Maliheh; Angelidaki, Irini.

In: Chemosphere, Vol. 242, 125119, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Anti-algal activity of Fe2O3–TiO2 photocatalyst on Chlorella vulgaris species under visible light irradiation

AU - Baniamerian, Hamed

AU - Tsapekos, Panagiotis

AU - Alvarado-Morales, Merlin

AU - Shokrollahzadeh, Soheila

AU - Safavi, Maliheh

AU - Angelidaki, Irini

PY - 2020

Y1 - 2020

N2 - Many industries located in coastal areas use a large amount of seawater. Algal biofouling can be a major problem that hinders the efficiency of these industrial facilities. In most cases, seawater requires algal removal pre-treatment to avoid or mitigate biofilm formation. To remediate green microalgae, Fe2O3–TiO2 nanoparticles with 2.5% w/w Fe2O3 were applied as a visible light driven photocatalyst. The anti-algal activity of the photocatalytic pre-treatment using green microalgae, Chlorella vulgaris was tested. The experiments were carried out in freshwater, artificial seawater, and real seawater. Effect of photocatalyst dosage, visible light intensity, and water salinity on the removal of microalgae was investigated. The highest inactivation efficiency of Chlorella vulgaris was achieved under 55 W/m2 visible light irradiation when 0.25 g/L of Fe2O3–TiO2 photocatalyst was used. The photocatalytic removal kinetics of Chlorella vulgaris followed the pseudo first order Langmuir-Hinshelwood model. The results revealed that the efficiency of photocatalytic removal of algae decreased with increasing of seawater salinity. The anti-algal activity of Fe2O3–TiO2 nanoparticles was attributed to the generation of reactive oxygen species (ROS) through the photocatalytic process. H+ radical was shown to be the most important ROS that nanoparticles produced in the aqueous media. Using Fe2O3–TiO2 nanoparticles in photocatalytic pre-treatment could be an efficient environmental-friendly method for micro-algal remediation in seawater under visible light.

AB - Many industries located in coastal areas use a large amount of seawater. Algal biofouling can be a major problem that hinders the efficiency of these industrial facilities. In most cases, seawater requires algal removal pre-treatment to avoid or mitigate biofilm formation. To remediate green microalgae, Fe2O3–TiO2 nanoparticles with 2.5% w/w Fe2O3 were applied as a visible light driven photocatalyst. The anti-algal activity of the photocatalytic pre-treatment using green microalgae, Chlorella vulgaris was tested. The experiments were carried out in freshwater, artificial seawater, and real seawater. Effect of photocatalyst dosage, visible light intensity, and water salinity on the removal of microalgae was investigated. The highest inactivation efficiency of Chlorella vulgaris was achieved under 55 W/m2 visible light irradiation when 0.25 g/L of Fe2O3–TiO2 photocatalyst was used. The photocatalytic removal kinetics of Chlorella vulgaris followed the pseudo first order Langmuir-Hinshelwood model. The results revealed that the efficiency of photocatalytic removal of algae decreased with increasing of seawater salinity. The anti-algal activity of Fe2O3–TiO2 nanoparticles was attributed to the generation of reactive oxygen species (ROS) through the photocatalytic process. H+ radical was shown to be the most important ROS that nanoparticles produced in the aqueous media. Using Fe2O3–TiO2 nanoparticles in photocatalytic pre-treatment could be an efficient environmental-friendly method for micro-algal remediation in seawater under visible light.

KW - Biofouling

KW - Chlorella vulgaris

KW - Microalgae

KW - Photocatalysis

KW - Seawater pre-treatment

KW - Visible light

U2 - 10.1016/j.chemosphere.2019.125119

DO - 10.1016/j.chemosphere.2019.125119

M3 - Journal article

VL - 242

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

M1 - 125119

ER -