Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria

Abstract Microplastics are ubiquitous in aquatic systems and break down into submicron particles that can interact with aquatic toxic chemicals. These interactions may affect the detection of toxicants when using bacteria as a biomonitoring tool. This study examined the effects of model polystyrene...

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Autores principales:	Bhuvaneshwari Manivannan, Evgeni Eltzov, Mikhail Borisover
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c97942f4d0dd4b838e881035aebc5fe4
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spelling	oai:doaj.org-article:c97942f4d0dd4b838e881035aebc5fe42021-12-02T14:25:32ZSubmicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria10.1038/s41598-021-86672-72045-2322https://doaj.org/article/c97942f4d0dd4b838e881035aebc5fe42021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86672-7https://doaj.org/toc/2045-2322Abstract Microplastics are ubiquitous in aquatic systems and break down into submicron particles that can interact with aquatic toxic chemicals. These interactions may affect the detection of toxicants when using bacteria as a biomonitoring tool. This study examined the effects of model polystyrene (PS)-based submicron particles on the detection of aqueous geno- and cytotoxicity by genetically modified bioluminescent (GMB) bacteria. The toxicities were tested in three treated wastewater (TWW) effluents before and after chlorination. The PS plastics included negatively charged sulfate-coated (S-PS) and pristine (P-PS) particles of different sizes (0.1, 0.5, and 1.0 µm) that were present at different concentrations. Chlorinated or not, the S-PS and P-PS particles per se were not toxic to the GMB bacteria. However, exposure of PS particles to TWW effluents can significantly reduce the measured geno- and cytotoxicity. Adsorption of toxic compounds to polymer particles can limit the ability of the bacteria to detect those compounds. This masking effect may be mitigated by TWW chlorination, possibly due to the formation of new toxic material. Due to interactions between toxic TWW constituents and the plastics particles, water samples containing particle-associated contaminants and/or their transformation products may be declared non-toxic, based on bacterial tests as a biomonitoring tool.Bhuvaneshwari ManivannanEvgeni EltzovMikhail BorisoverNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bhuvaneshwari Manivannan Evgeni Eltzov Mikhail Borisover Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
description	Abstract Microplastics are ubiquitous in aquatic systems and break down into submicron particles that can interact with aquatic toxic chemicals. These interactions may affect the detection of toxicants when using bacteria as a biomonitoring tool. This study examined the effects of model polystyrene (PS)-based submicron particles on the detection of aqueous geno- and cytotoxicity by genetically modified bioluminescent (GMB) bacteria. The toxicities were tested in three treated wastewater (TWW) effluents before and after chlorination. The PS plastics included negatively charged sulfate-coated (S-PS) and pristine (P-PS) particles of different sizes (0.1, 0.5, and 1.0 µm) that were present at different concentrations. Chlorinated or not, the S-PS and P-PS particles per se were not toxic to the GMB bacteria. However, exposure of PS particles to TWW effluents can significantly reduce the measured geno- and cytotoxicity. Adsorption of toxic compounds to polymer particles can limit the ability of the bacteria to detect those compounds. This masking effect may be mitigated by TWW chlorination, possibly due to the formation of new toxic material. Due to interactions between toxic TWW constituents and the plastics particles, water samples containing particle-associated contaminants and/or their transformation products may be declared non-toxic, based on bacterial tests as a biomonitoring tool.
format	article
author	Bhuvaneshwari Manivannan Evgeni Eltzov Mikhail Borisover
author_facet	Bhuvaneshwari Manivannan Evgeni Eltzov Mikhail Borisover
author_sort	Bhuvaneshwari Manivannan
title	Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
title_short	Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
title_full	Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
title_fullStr	Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
title_full_unstemmed	Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
title_sort	submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c97942f4d0dd4b838e881035aebc5fe4
work_keys_str_mv	AT bhuvaneshwarimanivannan submicronpolymerparticlesmaymaskthepresenceoftoxicantsinwastewatereffluentsprobedbyreportergenecontainingbacteria AT evgenieltzov submicronpolymerparticlesmaymaskthepresenceoftoxicantsinwastewatereffluentsprobedbyreportergenecontainingbacteria AT mikhailborisover submicronpolymerparticlesmaymaskthepresenceoftoxicantsinwastewatereffluentsprobedbyreportergenecontainingbacteria
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Submicron polymer particles may mask the presence of toxicants in wastewater effluents probed by reporter gene containing bacteria

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