Use of duckweed (Lemna disperma) to assess the phytotoxicity of the products of Fenton oxidation of metsulfuron methyl

Abdul, JM; Colville, A; Lim, R; Vigneswaran, S; Kandasamy, J

Use of duckweed (Lemna disperma) to assess the phytotoxicity of the products of Fenton oxidation of metsulfuron methyl

Abdul, JM Colville, A

Lim, R

Vigneswaran, S

Kandasamy, J

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Publication Type:: Journal Article
Citation:: Ecotoxicology and Environmental Safety, 2012, 83 pp. 89 - 95
Issue Date:: 2012-09-01

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Field	Value	Language
dc.contributor.author	Abdul, JM	en_US
dc.contributor.author	Colville, A https://orcid.org/0000-0002-6543-2539	en_US
dc.contributor.author	Lim, R https://orcid.org/0000-0002-4916-5688	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.contributor.author	Kandasamy, J	en_US
dc.date.available	2012-06-15	en_US
dc.date.issued	2012-09-01	en_US
dc.identifier.citation	Ecotoxicology and Environmental Safety, 2012, 83 pp. 89 - 95	en_US
dc.identifier.issn	0147-6513	en_US
dc.identifier.uri	http://hdl.handle.net/10453/22052
dc.description.abstract	Because of pressure on water supplies world-wide, there is increasing interest in methods of remediating contaminated ground waters. However, with some remediation processes, the breakdown products are more toxic than the original contaminant. Organic matter and salinity may also influence degradation efficiency. This study tested the efficiency of Fenton oxidation in degrading the sulfonylurea herbicide metsulfuron methyl (MeS), and tested the reaction products for phytotoxicity with the Lemna (duckweed) bioassay. The efficiency of degradation by Fenton's reagent (Fe2+=0.09mM; H2O2=1.76mM, 4h) decreased with increasing initial MeS concentration, from 98% with 5mg/L MeS, to 63% with 70mg/L MeS. Addition of NaCl (10mM) and organic matter (humic acid at 0.2 and 2.0mg C/L as Total Organic Carbon) reduced the efficiency of degradation at low initial MeS concentrations (5 and 10mg/L), but had no effect at high concentrations. The residual Fenton's reagent after Fenton's oxidation was toxic to Lemna. After removal of residual iron and H2O2, the measured toxicity to Lemna in the treated samples could be explained by the concentrations of MeS as measured by HPLC/UV detection, so there was no evidence of additional toxicity or amelioration due to the by-products or formulation materials. © 2012 Elsevier Inc.	en_US
dc.relation.ispartof	Ecotoxicology and Environmental Safety	en_US
dc.relation.isbasedon	10.1016/j.ecoenv.2012.06.014	en_US
dc.subject.classification	Strategic, Defence & Security Studies	en_US
dc.subject.mesh	Araceae	en_US
dc.subject.mesh	Sodium Chloride	en_US
dc.subject.mesh	Hydrogen Peroxide	en_US
dc.subject.mesh	Iron	en_US
dc.subject.mesh	Humic Substances	en_US
dc.subject.mesh	Arylsulfonates	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Toxicity Tests	en_US
dc.subject.mesh	Oxidation-Reduction	en_US
dc.subject.mesh	Biodegradation, Environmental	en_US
dc.title	Use of duckweed (Lemna disperma) to assess the phytotoxicity of the products of Fenton oxidation of metsulfuron methyl	en_US
dc.type	Journal Article
utslib.citation.volume	83	en_US
utslib.for	0502 Environmental Science and Management	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	05 Environmental Sciences	en_US
utslib.for	11 Medical and Health Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	83	en_US

Abstract:

Because of pressure on water supplies world-wide, there is increasing interest in methods of remediating contaminated ground waters. However, with some remediation processes, the breakdown products are more toxic than the original contaminant. Organic matter and salinity may also influence degradation efficiency. This study tested the efficiency of Fenton oxidation in degrading the sulfonylurea herbicide metsulfuron methyl (MeS), and tested the reaction products for phytotoxicity with the Lemna (duckweed) bioassay. The efficiency of degradation by Fenton's reagent (Fe2+=0.09mM; H2O2=1.76mM, 4h) decreased with increasing initial MeS concentration, from 98% with 5mg/L MeS, to 63% with 70mg/L MeS. Addition of NaCl (10mM) and organic matter (humic acid at 0.2 and 2.0mg C/L as Total Organic Carbon) reduced the efficiency of degradation at low initial MeS concentrations (5 and 10mg/L), but had no effect at high concentrations. The residual Fenton's reagent after Fenton's oxidation was toxic to Lemna. After removal of residual iron and H2O2, the measured toxicity to Lemna in the treated samples could be explained by the concentrations of MeS as measured by HPLC/UV detection, so there was no evidence of additional toxicity or amelioration due to the by-products or formulation materials. © 2012 Elsevier Inc.

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http://hdl.handle.net/10453/22052