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- W2108936152 abstract "Nanotechnology-based products, referred here as nanoproducts, have increased d the global markets over the past few years due to the benefits incurred to both consumers and manufacturers. This has resulted in substantially non nanomaterials (ENMs) into different studies have quantified the amounts of ENMs into different modelling techniques, due to lack of metrology to quantify the releases. These releases have been estimated to pose risk to various env calculated were largely greater than 1. However, all these studies have shown that only nano TiO2 (nTiO2) is the ENM of concern in the environment currently. The predicted environmental concentration (PEC) aquatic and terrestrial environments for ENMs: nTiO (CNT), and fullerenes (nC60) under the minimum, probable and maximum scenarios us modelling techniques as these consumer nanoproducts and industrial applications. The PEC values were calculated under high and low efficiency regimes of wastewater treatment plants of the Gauteng Province in South Africa (SA) – where the probable scenario values were deemed as most realistic estimates. The reported toxicological data of these ENMs in published evaluating the predicted no-effect concentrations (PNEC). Risk posed to both media considered in this study was calculated as the ratio of PEC/PNEC for each ENM. Findings from this study showed that the PEC plants ranged from 5.22 x 10-7 (Dk) values were taken as 0.75, 1 or 3 values in the terrestrial environment (PEC 10-2 μg/kg. On predicting risks of ENMs from 5.58 x 10-8 to 57.22 for high efficiency plants; whereas under low efficiency plants the RQwater values were found to be much higher ranging from 7.74 x 10 minimum, probable and maximum scenarios. The RQ determined for the first time in this study, where nAg had the highest RQ value of 2.846 x 10 maximum scenario implying that the concentration of nAg in raise any possible risk concerns. ABSTRACT -quantified releases of engineered environmental media, viz., water, air, and soil. Previous environmental media ironments because the risk quotient (RQ) values values were calculated in this study on the 2, nanosilver (nAg), carbon nanotubes are among the most used nanoscale materials in numerous scientific literature were applied in water values of ENMs under high and low efficiency to 9.69 μg/L. The values were obtained when t ; given Gauteng is a water scarce region. The calculated PEC soil) were very low, ranging from 3.97 x 10 to the aquatic environment, the RQ -8 to 96.93 under the soil values for nAg, CNT and nC Gauteng are so" @default.
- W2108936152 created "2016-06-24" @default.
- W2108936152 creator A5067906581 @default.
- W2108936152 date "2011-02-28" @default.
- W2108936152 modified "2023-09-26" @default.
- W2108936152 title "Estimated environmental risks of engineered nanomaterials in Gauteng." @default.
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- W2108936152 hasPublicationYear "2011" @default.
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