Measuring ZnO nanoparticles available concentrations in contaminated soils using the diffusive gradient in thin-films (DGT) technique

A major gap in understanding nanomaterials behaviour the environment is a lack of reliable tools to measure their available concentrations. In this research we use diffusive gradients thin films (DGT) for measuring concentrations zinc oxide nanoparticles (ZNO NPs) soils. Available nanoparticle were assessed by difference, using paired DGT devices with and without 1000 MWCO dialysis membranes exclude NPs. We used ZnO because its toxic effects are accelerated through dissolution Zn 2+ . Our test soils had different pH organic matter (OM) contents, which both affect rate Woburn (pH ? 6.9, OM 1.8%) Lufa 5.9, 4.2%) spiked single concentration 500 mg NPs per 1 kg soil dissolved evaluated 3, 7, 14, 21, 28, 60, 90, 120, 150 180 day intervals DGT. The results showed that NPs, as well nanoparticulate Zn, was much higher than Woburn. This work demonstrates can be simple yet technique determining probing kinetics. • equipped adding DM 2 During tests days low & also 1st study situ kinetics