ABSTRACT
Commercial.products.incorporating.nanomaterials.eventually.reach.the.end.of.their. usable.life. Sunbathers.wash.sunscreen.containing.titanium.dioxide.(TiO2).nanoparticles.from.their.skin;.antimicrobial.silver.particles.drain.from.washing.machines.in. the.rinse.cycle;.paints.and.coatings.flake;.or.materials.are.landfilled. What.happens. to.those.nanoparticles.at.the.end.of.product.life? In.short,.no.one.knows. Initial.attention.has.focused.on.the.fate.of.nanoparticles.in.wastewater.treatment. Nanoparticles. can.enter.a.municipal.wastewater.treatment.plant.as.a.result.of.commercial.use.and. discharge. Wastewater.discharges. from.manufacturing.processes.also.can.contain. nanoparticles. As.illustrated.by.examples.in.this.chapter,.however,.the.discharge.and. fate.of.nanomaterials.is.difficult.to.quantify.
