title: Conducting a battery of bioassays for gold nanoparticles to derive guideline value for the protection of aquatic ecosystems.
abstract: Gold nanoparticles (Au-NPs) are used in many applications, including the manufacture of products like cosmetics, paints, and electrochemical immunosensors, and in the detection, diagnosis, and treatment of tumors. However, there are no legal or recommended guidelines for protecting aquatic ecosystems from Au-NPs. In this study, we conducted a battery of bioassays and present toxicity values for two bacteria, one alga, one euglena, three cladoceran, and two fish species that were exposed to Au-NPs. Guideline values for protecting aquatic ecosystems from Au-NPs were derived using methods that are generally used to derive water-quality guidelines and are used in Australia, New Zealand, Canada, the European Community (EC), and the USA. Au-NPs had adverse effects on all test species, including growth inhibition of both bacteria, the alga, and the euglena; mortality and immobilization in the three cladocerans; and developmental malformations in the embryos and larvae of the two fish. Guideline values of 0.15 and 0.04 × 10(10) particles/mL were derived for Au-NPs using a species sensitivity distribution (SSD) and assessment factor. The guideline value derived for Au-NPs using an assessment factor was more stringent than that derived using SSD. This is the first study to derive guideline values for nanoparticles in water environments.
authors.affiliation: Department of Environmental Science, Konkuk University , Seoul , Korea.
authors.forename: Sun-Hwa
authors.initials: SH
authors.lastname: Nam
authors.forename: Yu-Jin
authors.initials: YJ
authors.lastname: Shin
authors.forename: Woo-Mi
authors.initials: WM
authors.lastname: Lee
authors.forename: Shin Woong
authors.initials: SW
authors.lastname: Kim
authors.forename: Jin Il
authors.initials: JI
authors.lastname: Kwak
authors.forename: Sung-Ji
authors.initials: SJ
authors.lastname: Yoon
authors.forename: Youn-Joo
authors.initials: YJ
authors.lastname: An
mesh_terms: D000818:Animals; D001681:Biological Assay; D017753:Ecosystem; D005399:Fishes; D005618:Fresh Water; D006046:Gold / Q000737:chemistry*; D017408:Guidelines as Topic; D007313:Insecta; D053768:Metal Nanoparticles / Q000737:chemistry / Q000633:toxicity*; D012623:Seawater; D014871:Water Microbiology
chemical_list: D006046:Gold
keywords: A battery of bioassays; aquatic ecosystem; ecotoxicology; gold nanoparticles; guidelines; nanoparticles; nanotoxicology; risk assessment