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To address the concern about the environmental impact of engineered nanoparticles frequently used in the recently marketed personal care and hygiene products (PCPs), we conducted a toxicity assessment and determined the EC values of the nanosized inorganic UV filter TiO (nano-TiO), as well as those of the organic UV filter oxybenzone (BP3) and three parabens (methyl, propyl, and benzylparaben) present in most PCPs formulation. The bioassays were carried out through standardized toxicity bioassays on two environmentally relevant aquatic species i.e. Daphnia magna and Phaeodactylum tricornutum. For nano-TiO 48 h EC on D. magna was 3.09 mgL and for parabens ranged from 32.52 to 1.35 mgL. The two most toxic compounds on D. magna, nano-TiO and benzylparaben (BzP), were further tested with the algae. For nano-TiO 72 h EC value was 2.27 mgL and for BzP it was 10.61 mgL. In addition, D. magna was exposed to selected binary mixtures of the target compounds i.e. nano-TiO+BP3, nano-TiO+BzP and BP3+BzP On the endpoint of 48 h, a synergistic action was observed for nano-TiO+BP3 and nano-TiO+BzP, but an antagonistic effect occurred in the mixture BP3+BzP. These findings suggest that nano-TiO can increase the toxicity of the mixture when combined with other compounds.
This article was published in the following journal.
Name: Ecotoxicology and environmental safety
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The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.
An antibiotic mixture of two components, A and B, obtained from Nocardia lurida (or the same substance produced by any other means). It is no longer used clinically because of its toxicity. It causes platelet agglutination and blood coagulation and is used to assay those functions in vitro.
An enzyme with high affinity for carbon dioxide. It catalyzes irreversibly the formation of oxaloacetate from phosphoenolpyruvate and carbon dioxide. This fixation of carbon dioxide in several bacteria and some plants is the first step in the biosynthesis of glucose. EC 126.96.36.199.
A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Determination of the quantity of a material present in a mixture by measurement of its effect on the electrical conductivity of the mixture. (Webster, 3d ed)
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...