Ecotoxic Effect of Photocatalytic Active Nanoparticles (TiO2) on Algae and Daphnids (8 pp)

Hund‐Rinke, Kerstin; Simon, Markus

doi:10.1065/espr2006.06.311

Cited by 555 publications

(238 citation statements)

References 15 publications

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“…One of the earlier studies using the green algae Desmodesmus subspicatus found no statistically significant differences associated with irradiation before TiO 2 NP (25 and 100 nm) exposures, nor an effect of shading [51]. Similarly, Van Hoecke et al [52] found no effects of shading on Pseudokirchneriella subcapitata during experiments with CeO 2 NPs.…”

Section: Critical Variations In Protocols For the Microalgae Testmentioning

confidence: 90%

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Handy

Cornelis

Fernandes

et al. 2011

Enviro Toxic and Chemistry

302

236

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Abstract-Ecotoxicology research is using many methods for engineered nanomaterials (ENMs), but the collective experience from researchers has not been documented. This paper reports the practical issues for working with ENMs and suggests nano-specific modifications to protocols. The review considers generic practical issues, as well as specific issues for aquatic tests, marine grazers, soil organisms, and bioaccumulation studies. Current procedures for cleaning glassware are adequate, but electrodes are problematic. The maintenance of exposure concentration is challenging, but can be achieved with some ENMs. The need to characterize the media during experiments is identified, but rapid analytical methods are not available to do this. The use of sonication and natural/synthetic dispersants are discussed. Nano-specific biological endpoints may be developed for a tiered monitoring scheme to diagnose ENM exposure or effect. A case study of the algal growth test highlights many small deviations in current regulatory test protocols that are allowed (shaking, lighting, mixing methods), but these should be standardized for ENMs. Invertebrate (Daphnia) tests should account for mechanical toxicity of ENMs. Fish tests should consider semistatic exposure to minimize wastewater and animal husbandry. The inclusion of a benthic test is recommended for the base set of ecotoxicity tests with ENMs. The sensitivity of soil tests needs to be increased for ENMs and shortened for logistics reasons; improvements include using Caenorhabditis elegans, aquatic media, and metabolism endpoints in the plant growth tests. The existing bioaccumulation tests are conceptually flawed and require considerable modification, or a new test, to work for ENMs. Overall, most methodologies need some amendments, and recommendations are made to assist researchers. Environ. Toxicol. Chem. 2012;31:15-31. # 2011 SETAC

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Section: Critical Variations In Protocols For the Microalgae Testmentioning

confidence: 90%

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Handy

Cornelis

Fernandes

et al. 2011

Enviro Toxic and Chemistry

302

236

View full text Add to dashboard Cite

show abstract

“…Their results showed that the increasing concentration of Cadmium and Zinc is related to NPs adsorption in Daphnia magna experiments. Although previous studies have examined the potential effects of nano-TiO 2 , those that specifically studied the ecotoxicity of nano-TiO 2 are limited on acute and chronic experiments (Hund-Rinke and Simon, 2006;Federici et al, 2007;Heinlaan et al, 2008;Wiench et al, 2009). Therefore, the present study investigated the carrier effect of nano-TiO 2 in the aquatic environment and described the ecotoxicological effects of concomitant exposure to Pb and nano-TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Effects of titanium dioxide nanoparticles on lead bioconcentration and toxicity on thyroid endocrine system and neuronal development in zebrafish larvae

et al. 2015

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“…According to the European Union Directive on classification, packaging and labeling of dangerous substances (Council Directive 67/548/EEC), a toxicity in the range of 10-100 mg.L -1 combined with a lack of biodegradability has to be classified as 'harmful to aquatic organisms and may cause long-term adverse effects in the aquatic environment' [28]. Our results demonstrate that even low doses such as 1 mg.L -1 of a TiO 2 -Np sunscreen formulation is enough to induce significant cell sedimentation.…”

Section: Resultsmentioning

confidence: 57%

“…Hund-Rinke et al [28] explained that part of the algal inhibition by TiO 2 -Np is probably not caused by the reduced light intensity, but is due to the toxicity of the particles. The sensitivity of other algae to TiO 2 -Np has been previously described [29]; for example, P. subcapitata is more sensitive to nanosized TiO 2 than C. reinhardtii, followed by D. subspicatus.…”

Section: Nanoecotoxicological Effects Of a Sunscreen Formulation Basementioning

confidence: 99%

Nanoecotoxicological Effects of a Sunscreen Formulation based on Tio2 Nanoparticles on Microalgae from Guanabara Bay (Rio de Janeiro, Brazil)

Abe¹,

Cunha²,

Salomon³

et al. 2017

MOJPS

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The rise of nanotechnology has resulted in an increase in the use of nanoproducts, such as sunscreens based on nanoparticles of TiO 2 (TiO 2 -Np), which reach aquatic ecosystems through their manufacture, consumption and disposal. Studies indicate that TiO 2 -Np have an ecotoxicological potential, inactivating algae from the Anabaena, Microcystis and Melosira genera. Tetraselmis sp., abundant phytoplanktonic organisms of Guanabara Bay (Rio de Janeiro, Brazil), has been exposed to any discarded material released into this environment. In order to evaluate the effects of TiO 2 -Np on Tetraselmis sp., treatments with different doses of TiO 2 -Np were performed and their morphology, morphometry, surface charge, chlorophyll a rate and catalase production were analyzed. Under normal culture conditions, doses over 25 mg.L -1 caused intense precipitation, agglomeration and disruption of the cells, with remarkable variation of the zeta potential. No significant modification in the amount of chlorophyll a was observed, while the catalase production decreased only by 100 mg.L -1 of TiO 2 -Np. The results showed that TiO 2 -Np induced several effects in algae, highlighting their cell agglomeration. In conclusion, TiO 2 -Np provoked harmful effects in Tetraselmis sp., an important phytoplanktonic organism of Guanabara Bay (Rio de Janeiro, Brazil), and may disturb the dynamics of this ecosystem.

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Ecotoxic Effect of Photocatalytic Active Nanoparticles (TiO2) on Algae and Daphnids (8 pp)

Cited by 555 publications

References 15 publications

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Ecotoxicity test methods for engineered nanomaterials: Practical experiences and recommendations from the bench

Effects of titanium dioxide nanoparticles on lead bioconcentration and toxicity on thyroid endocrine system and neuronal development in zebrafish larvae

Nanoecotoxicological Effects of a Sunscreen Formulation based on Tio2 Nanoparticles on Microalgae from Guanabara Bay (Rio de Janeiro, Brazil)

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