Toxic nanoparticle treatment of ponds of farmed fish could be made safe by embedding in into water filters, find scientists in Iran





prevent fungal infections in fish farmed indoors, in a step that they say could replace the direct release of nanoparticles into tanks — a process they have found is toxic to young rainbow trout.

The filter was developed following a study published in the Iranian Journal of Fisheries Sciences, which concluded that the direct application of 'colloidal silver' nanoparticles should no longer be allowed for fish, not least for rainbow trout, for which Iran is the world's largest producer.  /cinvu

"We believe that the direct release of colloidal nanoparticles into the environment, especially in the aquaculture industry, must be prohibited," Mohammad Reza Kalbassi, associate professor of aquaculture biotechnology at Tarbiat Modares University, Iran, and co-author of the study, tells SciDev.Net. "However, indirect use in a filter or via other instruments after scientific consideration may improve [the aquaculture] industry in future". 


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