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Dissolution and toxicity of silver nanoparticles in the presence of aquatic humic substances and extracellular polymeric substances

Grant number: 18/20326-1
Support type:Regular Research Grants
Duration: February 01, 2019 - January 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal researcher:André Henrique Rosa
Grantee:André Henrique Rosa
Home Institution: Instituto de Ciência e Tecnologia. Universidade Estadual Paulista (UNESP). Campus de Sorocaba. Sorocaba , SP, Brazil


Silver nanoparticles (NPs) with different coatings have been widely used in various applications such as medicines, textile industry, treatment of contaminants, etc. As NPs reach the levels, they can influence the quality and resistance of the molecules, and by means of biomagnification and the food chain they become humans. There are only few studies available in the literature about transformations that NPs may suffer in the aquatic environment, especially in the presence of aquatic organic substances, such as aquatic humic substances (AHS) and extracellular polymeric substances (EPS). Thus, the present project intent to evaluate the solubility, transformations and toxicity of silver NPs (Ag-NPs) in the presence of AHS and EPS. Pyrolysis coupled with gas chromatography mass spectrometer (PY-CG-MS), potentiometric titration, ultrafiltration/ inductively coupled plasma optical emission spectrometry and electrophoretic mobility. The toxicity will be assessed through ecotoxicological tests using a R. subcapitata microalgae as an organic test. Thus, this project aims to bring greater understanding about the reactivity and toxicity of nanoparticles and natural organic matter in aquatic systems. (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MACHADO DE CAMPOS, MARIANA BIZARI; CEBIM, MARCO AURELIO; MEIRELLES, MARIANA RODRIGUES; PARIS, ELAINE CRISTINA; ROSA, ANDRE HENRIQUE. Influence of terbium (III) ions on the photocatalytic activity of TiO2 and CeO2 for the degradation of methylene blue in industrial effluents. Environmental Science and Pollution Research, v. 28, n. 21, p. 27147-27161, . (18/20326-1)
MACEDO, CARLOS ALVES; GONTIJO, ERIK SARTORI JEUNON; HERRERA, SANTIAGO GOMEZ; RANGEL, ELIDIANE CIPRIANO; KOMATSU, DANIEL; LANDERS, RICHARD; ROSA, ANDRE HENRIQUE. Organosulphur-modified biochar: An effective green adsorbent for removing metal species in aquatic systems. SURFACES AND INTERFACES, v. 22, . (18/20326-1)
JEUNON GONTIJO, ERIK SARTORI; HERZSPRUNG, PETER; LECHTENFELD, OLIVER J.; BUENO, CAROLINA DE CASTRO; BARTH, JOHANNES A. C.; ROSA, ANDRE H.; FRIESE, KURT. Multi-proxy approach involving ultrahigh resolution mass spectrometry and self-organising maps to investigate the origin and quality of sedimentary organic matter across a subtropical reservoir. Organic Geochemistry, v. 151, . (18/20326-1)
SIMONETTI, VANESSA C.; FRASCARELI, DANIELE; GONTIJO, ERIK S. J.; MELO, DARLLENE S.; FRIESE, KURT; SILVA, DARLLAN C. C.; ROSA, ANDRE H.. Water quality indices as a tool for evaluating water quality and effects of land use in a tropical catchment. INTERNATIONAL JOURNAL OF RIVER BASIN MANAGEMENT, . (16/08215-4, 18/20326-1, 16/15397-1)
MELO, DARLLENE S.; GONTIJO, ERIK S. J.; FRASCARELI, DANIELE; SIMONETTI, VANESSA C.; MACHADO, LEILA S.; BARTH, JOHANNES A. C.; MOSCHINI-CARLOS, VIVIANE; POMPEO, MARCELO L.; ROSA, ANDRE H.; FRIESE, KURT. Self-Organizing Maps for Evaluation of Biogeochemical Processes and Temporal Variations in Water Quality of Subtropical Reservoirs. WATER RESOURCES RESEARCH, v. 55, n. 12, . (16/15397-1, 18/20326-1)
BUENO, CAROLINA DE CASTRO; FRASCARELI, DANIELE; GONTIJO, ERIK S. J.; VAN GELDERN, ROBERT; ROSA, ANDRE H.; FRIESE, KURT; BARTH, JOHANNES A. C.. Dominance of in situ produced particulate organic carbon in a subtropical reservoir inferred from carbon stable isotopes. SCIENTIFIC REPORTS, v. 10, n. 1, . (18/20326-1, 16/15397-1)

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