Fig. 6

Environmental level (●, other countries, X, South Korea) of nanoparticles and its toxicity level () on aquatic organisms Kim et al. (2010); Kim et al. (2014); Yang et al. (2013); Kiser et al. (2009); Westerhoff et al. (2011); Mitrano et al. (2012); Johnson et al. (2011a); Gottschalk et al. (2009); Johnson et al. (2011b); Khosravi et al. (2012); Hendren et al. (2013)