Multimodal Action and Selective Toxicity of Zerovalent Iron Nanoparticles against Cyanobacteria

0377059 - BÚ 2013 RIV US eng J - Journal Article
Maršálek, Blahoslav - Jančula, Daniel - Maršálková, Eliška - Mashlan, M. - Šafářová, K. - Tuček, J. - Zbořil, R.
Multimodal Action and Selective Toxicity of Zerovalent Iron Nanoparticles against Cyanobacteria.
Environmental Science and Technology. Roč. 46, č. 4 (2012), s. 2316-2323. ISSN 0013-936X. E-ISSN 1520-5851
R&D Projects: GA MZe QH81012; GA MPO FR-TI3/196; GA MŠMT 1M0571
Institutional research plan: CEZ:AV0Z60050516
Keywords : Microcystis aeruginosa * phosphorus adsorption * phosphorus removal
Subject RIV: EF - Botanics
Impact factor: 5.257, year: 2012

We show that treatment with nanoparticles of zerovalent iron (nZVI) is an effective and environmentally benign method for destroying and preventing the formation of cyanobacterial water blooms. The nanoparticles have multiple modes of action, including the removal of bioavailable phosphorus, the destruction of cyanobacterial cells, and the immobilization of microcystins, preventing their release into the water column. Ecotoxicological experiments showed that nZVI is a highly selective agent, having an EC50 of 50 mg/L against cyanobacteria; this is 20-100 times lower than its EC50 for algae, daphnids, water plants, and fishes. The primary product of nZVI treatment is nontoxic and highly aggregated Fe(OH)(3), which promotes flocculation and gradual settling of the decomposed cyanobacterial biomass.
Permanent Link: http://hdl.handle.net/11104/0209316