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Transformation Products of Synthetic Chemicals in the Environment (Paperback, 2009 ed.)
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Discovery Miles 54 190
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Transformation Products of Synthetic Chemicals in the Environment (Paperback, 2009 ed.)
Series: Reactions and Processes, 2 / 2P
Expected to ship within 10 - 15 working days
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Following release to the environment, synthetic chemicals may be
degraded by biotic and abiotic processes. The degradation of the
chemical can follow a plethora of pathways and a range of other
substances can be formed via
thesedifferentpathways(e.g.[1]).Anumberoftermshavebeenusedforthese
substances including metabolites, degradates and transformation
products - in this book we use the term transformation products.
While we often know a lot about the environmental properties and
effects of the parent synthetic chemical, we know much less about
the transformationproducts. Transformationproductscanbehave very
differently fromtheparent c- pound (e.g. [2]). For example,
selected transformation products are much more persistent than
their associated parent compound in soils, waters and sediments
andsomemaybetransported aroundthelocal,regionalandglobal
environmentstoadifferentextentthantheparentcompound.Transformation
products can also have very different toxicities than the parent
compound (e.g. [3]) and in some cases transformation products can
be orders of mag- tude more toxic than their parent compound;
although this situation is rare. The environmental risks of
transformation products can therefore be very different than the
risks of the parent compound.
Thepotentialenvironmentalimpactsoftransformationproductsarerec-
nised by many regulatory assessment schemes. For example, in the
EU, pes-
cideproducersarenotonlyrequiredtoassessthefateandeffectsoftheparent
pesticide but are also required to assess the potential adverse
effects of major metabolitesandminor metabolitesthat aredeemed
tobeofconcern[4]. S- ilar requirements also exist for new human and
veterinary pharmaceuticals and biocides (e.g. [5]). However, for
many older substances and many other substance classes (e.g.
industrial chemicals), data on the environmental risks of
transformationproductscan be limited or non-existent.
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