Trophic transfer of Cu nanoparticles in a simulated aquatic food chain.

Autor: Yu Q; Institute of Environmental Sciences (CML), Leiden University, Leiden 2300 RA, the Netherlands. Electronic address: q.yu@aliyun.com., Zhang Z; College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China., Monikh FA; Institute of Environmental Sciences (CML), Leiden University, Leiden 2300 RA, the Netherlands; Department of Environmental & Biological Sciences, University of Eastern Finland, FI-80101 Joensuu, Finland., Wu J; Institute of Environmental Sciences (CML), Leiden University, Leiden 2300 RA, the Netherlands., Wang Z; School of Environmental Science and Engineering, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science and Technology, Nanjing 210044, PR China. Electronic address: zhuang.wang@nuist.edu.cn., Vijver MG; Institute of Environmental Sciences (CML), Leiden University, Leiden 2300 RA, the Netherlands., Bosker T; Institute of Environmental Sciences (CML), Leiden University, Leiden 2300 RA, the Netherlands., Peijnenburg WJGM; Institute of Environmental Sciences (CML), Leiden University, Leiden 2300 RA, the Netherlands; Centre for Safety of Substances and Products, National Institute of Public Health and the Environment (RIVM), Bilthoven 3720 BA, the Netherlands.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2022 Sep 01; Vol. 242, pp. 113920. Date of Electronic Publication: 2022 Jul 26.
DOI: 10.1016/j.ecoenv.2022.113920
Abstrakt: The goal of the current study was to quantify the trophic transfer of copper nanoparticles (CuNPs) in a food chain consisting of the microalga Pseudokirchneriella subcapitata as the representative of primary producer, the grazer Daphnia magna, and the omnivorous mysid Limnomysis benedeni. To quantify the size and number concentration of CuNPs in the biota, tissue extraction with tetramethylammonium hydroxide (TMAH) was performed and quantification was done by single particle inductively coupled plasma mass spectrometry (sp-ICP-MS). The bioconcentration factor (BCF) of the test species for CuNPs varied between 10 2 - 10 3 L/kg dry weight when expressing the internal concentration on a mass basis, which was lower than BCF values reported for Cu 2+ (10 3 - 10 4 L/kg dry weight). The particle size of CuNPs determined by sp-ICP-MS ranged from 22 to 40 nm in the species. No significant changes in the particle size were measured throughout the food chain. Moreover, the measured number of CuNPs in each trophic level was in the order of 10 13 particles/kg wet weight. The calculated trophic transfer factor (mass concentration basis) was > 1. This indicates biomagnification of particulate Cu from P. subcapitata to L. benedeni. It was also found that the uptake of particulate Cu (based on the particle number concentration) was mainly from the dietary route rather than from direct aqueous exposure. Furthermore, dietary exposure to CuNPs had a significant effect on the feeding rate of mysid during their transfer from daphnia to mysid and from alga through daphnia to mysid. This work emphasizes the importance of tracing the particulate fraction of metal-based engineered nanoparticles when studying their uptake and trophic transfer.
(Copyright © 2022. Published by Elsevier Inc.)
Databáze: MEDLINE
Externí odkaz: