Waste might be generated during ENM manufacturing,
and this may or may not contain ENMs, whereby
the latter scenario may be handled according to the
local waste management system. Nanowaste may
occur as a by-product of the manufacturing process as
(1) rejected material from the ENM size selection
stage (Ko¨hler et al. 2008), (2) residual ancillary
materials used for the manufacturing and/or purification
of ENMs and (3) leftover surplus of raw material.