Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO2 reactor

Carlos J. Pestana; Peter Hobson; Peter K.J. Robertson; Linda A. Lawton; Gayle Newcombe

doi:10.1016/j.chemosphere.2019.125575

Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO2 reactor

Carlos J. Pestana^*
, Peter Hobson
, Peter K.J. Robertson
, Linda A. Lawton
, Gayle Newcombe

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

220 Downloads (Pure)

Abstract

Photocatalysis has been shown to successfully remove microcystins (MC) in laboratory experiments. Most research to date has been performed under ideal conditions in pure or ultrapure water. In this investigation the efficiency of photocatalysis using titanium dioxide was examined in a complex matrix (waste stabilisation lagoon water). A flow-through photocatalytic reactor was used for the photocatalytic removal of four commonly occurring microcystin analogues (MC-YR, MC-RR, MC-LR, and MC-LA). Up to 51% removal for single MC analogues in waste lagoon water was observed. Similar removal rates were observed when a mixture of all four MC analogues was treated. Although treatment of MC-containing cyanobacterial cells of Microcystis aeruginosa resulted in no decline in cell numbers or viability with the current reactor design and treatment regime, the photocatalytic treatment did improve the overall quality of waste lagoon water. This study demonstrates that despite the presence of natural organic matter the microcystins could be successfully degraded in a complex environmental matrix.

Original language	English
Article number	125575
Number of pages	8
Journal	Chemosphere
Volume	245
Early online date	10 Dec 2019
DOIs	https://doi.org/10.1016/j.chemosphere.2019.125575
Publication status	Published - 01 Apr 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Cyanobacteria
Microcystin
Photocatalysis
Titanium dioxide
Waste water treatment

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
General Chemistry
Pollution
Health, Toxicology and Mutagenesis

Access to Document

10.1016/j.chemosphere.2019.125575Licence: Unspecified

Chemosphere 2020 245 Final Authors Accepted Version
Copyright 2019 Elsevier. This manuscript is distributed under a Creative Commons Attribution-NonCommercial-NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits distribution and reproduction for non-commercial purposes, provided the author and source are cited.
Accepted author manuscript, 1.25 MBLicence: CC BY-NC-ND

Cite this

@article{1552bbbfdc174142b058e2f60551d931,

title = "Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO2 reactor",

abstract = "Photocatalysis has been shown to successfully remove microcystins (MC) in laboratory experiments. Most research to date has been performed under ideal conditions in pure or ultrapure water. In this investigation the efficiency of photocatalysis using titanium dioxide was examined in a complex matrix (waste stabilisation lagoon water). A flow-through photocatalytic reactor was used for the photocatalytic removal of four commonly occurring microcystin analogues (MC-YR, MC-RR, MC-LR, and MC-LA). Up to 51\% removal for single MC analogues in waste lagoon water was observed. Similar removal rates were observed when a mixture of all four MC analogues was treated. Although treatment of MC-containing cyanobacterial cells of Microcystis aeruginosa resulted in no decline in cell numbers or viability with the current reactor design and treatment regime, the photocatalytic treatment did improve the overall quality of waste lagoon water. This study demonstrates that despite the presence of natural organic matter the microcystins could be successfully degraded in a complex environmental matrix.",

keywords = "Cyanobacteria, Microcystin, Photocatalysis, Titanium dioxide, Waste water treatment",

author = "Pestana, \{Carlos J.\} and Peter Hobson and Robertson, \{Peter K.J.\} and Lawton, \{Linda A.\} and Gayle Newcombe",

year = "2020",

month = apr,

day = "1",

doi = "10.1016/j.chemosphere.2019.125575",

language = "English",

volume = "245",

journal = "Chemosphere",

issn = "0045-6535",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO2 reactor

AU - Pestana, Carlos J.

AU - Hobson, Peter

AU - Robertson, Peter K.J.

AU - Lawton, Linda A.

AU - Newcombe, Gayle

PY - 2020/4/1

Y1 - 2020/4/1

N2 - Photocatalysis has been shown to successfully remove microcystins (MC) in laboratory experiments. Most research to date has been performed under ideal conditions in pure or ultrapure water. In this investigation the efficiency of photocatalysis using titanium dioxide was examined in a complex matrix (waste stabilisation lagoon water). A flow-through photocatalytic reactor was used for the photocatalytic removal of four commonly occurring microcystin analogues (MC-YR, MC-RR, MC-LR, and MC-LA). Up to 51% removal for single MC analogues in waste lagoon water was observed. Similar removal rates were observed when a mixture of all four MC analogues was treated. Although treatment of MC-containing cyanobacterial cells of Microcystis aeruginosa resulted in no decline in cell numbers or viability with the current reactor design and treatment regime, the photocatalytic treatment did improve the overall quality of waste lagoon water. This study demonstrates that despite the presence of natural organic matter the microcystins could be successfully degraded in a complex environmental matrix.

AB - Photocatalysis has been shown to successfully remove microcystins (MC) in laboratory experiments. Most research to date has been performed under ideal conditions in pure or ultrapure water. In this investigation the efficiency of photocatalysis using titanium dioxide was examined in a complex matrix (waste stabilisation lagoon water). A flow-through photocatalytic reactor was used for the photocatalytic removal of four commonly occurring microcystin analogues (MC-YR, MC-RR, MC-LR, and MC-LA). Up to 51% removal for single MC analogues in waste lagoon water was observed. Similar removal rates were observed when a mixture of all four MC analogues was treated. Although treatment of MC-containing cyanobacterial cells of Microcystis aeruginosa resulted in no decline in cell numbers or viability with the current reactor design and treatment regime, the photocatalytic treatment did improve the overall quality of waste lagoon water. This study demonstrates that despite the presence of natural organic matter the microcystins could be successfully degraded in a complex environmental matrix.

KW - Cyanobacteria

KW - Microcystin

KW - Photocatalysis

KW - Titanium dioxide

KW - Waste water treatment

U2 - 10.1016/j.chemosphere.2019.125575

DO - 10.1016/j.chemosphere.2019.125575

M3 - Article

AN - SCOPUS:85076253419

SN - 0045-6535

VL - 245

JO - Chemosphere

JF - Chemosphere

M1 - 125575

ER -

Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO2 reactor

Abstract

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this