News and Comments about Life
Europe is bound to face a lack of experts and researchers in the field of nanotechnology safety. As a consequence, companies wishing to market a new nanoproduct could find themselves unable to explore carefully its entire life-cycle, from manufacturing through use of the item all the way to its final disposal or possible recycling. With possible fall out on public health and the environment.
After more than a decade of working on nanotechnology, there are hundreds, maybe thousands of products based on nanotechnological manufacturing processes available on the market today, ranging from sun cream and pigments all the way to clothing.
Right from the very start of the industrial use of nanothecnology in production processes the issue of safety has been in the frontline. A great number of projects on the risks associated with nanomaterials have been initiated and carried out.
Harald Krug, a toxicologist at Swiss Empa has, after a decade of research in the field of nanosafety, come to the conclusion that "To date no specific risks are known to exist in association with the use of nanoproducts – or rather free nanoparticles." But even if there are no concrete indications of serious problems with synthetic nanoparticles, Krug says that this is not a general "all clear". But just when there is more need for them, a large number of environmental toxicological institutes in Europe have been closed down. One aspect that particularly worries Harald Krug.
The threat the Swiss scientist sees in the next future is the lack of experts and specialists in the field of the environmental nanotoxicology.” Consequently, in countless scientific publications in the field the rules of toxicology are not being followed, usually through lack of knowledge. "And as a result there are these horror stories which create a great deal of uncertainty and unease."
A 60 page report recently published by the German Society for Chemical Engineering and Biotechnology (DECHEMA) and the Chemical Industry Association (VCI) offers an overview of research projects conducted during the last decade on the subject of nanosafety. It covers six Swiss, 40 German, one US and 25 EU projects. In one of these projects Empa, together with the Cantonal Hospital of St Gallen, investigated whether nanoparticles can pass through the human placenta and enter the circulatory system of an unborn baby. Toxicologists from Empa’s «Materials meet Life» laboratory studied human placentas (donated by mothers immediately after giving birth) to evaluate how good a barrier they represent. Their experiments showed that particles with diameters of less than 200 to 300 nm could pass through into the fetal bloodstream. The question is, does this damage placental tissue or possibly have an influence on the development of the unborn child? At the same time, looking on the positive side, it is possible to imagine the transport of nanovehicles through the placenta as a means of delivering targeted treatment to the baby while it is still in the womb.
In another report (to which Krug was also a significant contributor) which was recently presented in Brussels, the European Academies Science Advisory Council (EASAC) drew attention to the gaps in our scientific knowledge in this field and indicated very clearly the topics which need to be researched in the coming years in order that nanomaterials can be directly utilized without risks to our environment or to human health. "Looking at these results, I really wish that in future we would invest more in education and training in environmental toxicology. Only then is it possible to undertake responsible research in this field, and only then can we guarantee the sustainable development of these new technologies," says Krug.