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Effects of copper in Daphnia are modulated by nanosized titanium dioxide and natural organic matter: what is the impact of aging duration?

Roy, Rajdeep and Luederwald, Simon and Alawi Ahmed Maknoon, Asawer and Metreveli, George and Schulz, Ralf and Bundschuh, Mirco (2021). Effects of copper in Daphnia are modulated by nanosized titanium dioxide and natural organic matter: what is the impact of aging duration? Environmental Science and Pollution Research. 28 , 13991-13999
[Research article]

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Abstract

During its aquatic life cycle, nanosized titanium dioxide (nTiO(2)) may interact with natural organic matter (NOM) ultimately altering the ecotoxicity of co-occurring chemical stressors such as heavy metals (e.g. copper (Cu)). In this context, the following hypotheses were tested: (1) aging of nTiO(2) along with Cu reduces Cu toxicity, (2) nTiO(2) agglomerates have a lower potential to reduce Cu toxicity and (3) aging of nTiO(2) in presence of NOM reduces Cu toxicity further. A multifactorial test design crossing three nTiO(2) levels (0.0, 0.6 and 3.0 mg/L) with two levels of NOM (0 versus 8 mg total organic carbon (TOC)/L) and seven nominal Cu concentrations (ranging from 0 to 1536 mu g/L) aged in ASTM medium for 0, 1, 3 and 6 days was realised, while two aging scenarios were applied (type 1: nTiO(2) jointly aged with Cu; type 2: Cu added after nTiO(2) aging). Subsequently, Cu toxicity was assessed using the immobility of Daphnia magna after 48 h of exposure as response variable. The experiments revealed that neither aging duration nor the extent of agglomeration (type 1 vs. type 2 aging) has a substantial impact on Cu induced toxicity. Moreover, it was confirmed that the presence of NOM substantially reduced Cu induced toxicity, independent of the aging scenario and duration. More importantly, the data suggest the ingestion of Cu loaded nTiO(2) as additional exposure pathway contributing to Cu toxicity. In conclusion, it seems unlikely that nTiO(2) concentrations currently detected in or predicted for aquatic ecosystems, which are at least one order of magnitude below the concentration tested here, influence Cu toxicity meaningfully.

Authors/Creators:Roy, Rajdeep and Luederwald, Simon and Alawi Ahmed Maknoon, Asawer and Metreveli, George and Schulz, Ralf and Bundschuh, Mirco
Title:Effects of copper in Daphnia are modulated by nanosized titanium dioxide and natural organic matter: what is the impact of aging duration?
Series Name/Journal:Environmental Science and Pollution Research
Year of publishing :2021
Volume:28
Page range:13991-13999
Number of Pages:9
Publisher:SPRINGER HEIDELBERG
ISSN:0944-1344
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Aging, Nanomaterials, Natural organic matter, Metal ions, Combined effect, Mixture toxicity
URN:NBN:urn:nbn:se:slu:epsilon-p-109344
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109344
Additional ID:
Type of IDID
DOI10.1007/s11356-020-11578-2
Web of Science (WoS)000590278000008
ID Code:22730
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:10 Mar 2021 14:23
Metadata Last Modified:10 Mar 2021 14:31

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