Releasing of Silver From Fabrics Containing Nano Ag0 During Washing And Toxicity Tests of Ag+ , Nano Ag0 , Nano Ag2o, and Wash Water on Moina Macrocopa

The objectives of this research were to study the content of total silver that was detached from fabrics containing nano Ag 0 after washing and to determine toxicity test of Ag +, nano Ag 0 , nano Ag 2 O, and wash water on water fleas (Moina macrocopa), a common freshwater zooplankton in a tropical region.The average content of silver nanoparticles in commercial T-shirt was 212 mg/kg of fabric.In addition, silver nanoparticles were detached from fabrics after washing in a washing machine.The maximum content of total silver in the wash water was 122.6 µg/L.The results of toxicity test showed the following order of toxicity on water flea; Ag + > nano Ag 0 > nano Ag 2 O.The LC 50 (Lethal Concentration) of Ag + , nano Ag 0 , nano Ag 2 O were 0.045±0.13,1.59±0.59and 18.94±1.45mg/L, respectively.The toxicity test of the wash water from fabrics containing silver nanoparticles revealed that the mortality of water fleas was not significantly different from the control treatments and this could be due to very low concentrations of silver nanoparticles in the wash water.