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Natural organic matter concentration and hydrochemistry influence aggregation kinetics of functionalized engineered nanoparticles.
The results show that without Suwannee river natural organic matter (SRNOM), MUA coating resulted in greater stability than citrate coating for GNPs, indicating that for the new materials emerging from the application of nanotechnology the well-described aggregation mechanisms of colloids in the environment require a detailed re-examination. Expand
The potential of TiO2 nanoparticles as carriers for cadmium uptake in Lumbriculus variegatus and Daphnia magna.
The toxicity of cadmium to two freshwater organisms, water column crustacean Daphnia magna and sediment oligochaete Lumbriculus variegatus, was investigated both in the absence and presence of titanium dioxide (TiO(2)) nanoparticles. Expand
Separation and characterization of nanoparticles in complex food and environmental samples by field-flow fractionation
Abstract The thorough analysis of natural nanoparticles (NPs) and engineered NPs involves the sequence of detection, identification, quantification and, if possible, detailed characterization. In aExpand
Influence of surface functionalization and particle size on the aggregation kinetics of engineered nanoparticles.
The results show that the physico-chemical properties of the capping agent have a greater influence on the aggregation behavior of FAuNPs than either their core composition or their particle size. Expand
Fate and behaviour of Cu and Zn from pig slurry spreading in a tropical water–soil–plant system
Pig slurry is commonly spread on crop fields as a means of managing this agricultural waste product. However, this practice has an impact on the environment, e.g. increasing soil copper (Cu) and zincExpand
Fate of pristine TiO2 nanoparticles and aged paint-containing TiO2 nanoparticles in lettuce crop after foliar exposure.
Results obtained on the foliar uptake mechanisms of nano- and microparticles are important in the perspective of risk assessment of atmospheric contaminations. Expand
Investigation of copper speciation in pig slurry by a multitechnique approach.
X-ray absorption near-edge structure spectroscopy showed that Cu speciation in raw pig slurry and size fractions could be described by Cu(2)S and that its oxidation state is Cu(I), and geochemical calculation demonstrated that chalcocite was the major Cu species present under Pig slurry lagoon physical-chemical conditions. Expand
Combining size fractionation, scanning electron microscopy, and X-ray absorption spectroscopy to probe zinc speciation in pig slurry.
This study involved a combination of techniques to investigate Zn speciation in pig slurry and highlighted the presence of 49% Zn bound to organic matter, 37% amorphous Zn hydroxides [Zn(OH)(2], and 14% sphalerite (ZnS). Expand
Zinc fate in animal husbandry systems.
The understanding of Zn absorption has made progress, and fine-tuned approaches towards the nutritional and metabolic interactions for Zn supplementation in farm conditions still require further studies, according to an overview of the current knowledge on the fate of zinc. Expand
Validation of methods for the detection and quantification of engineered nanoparticles in food.
A generic approach for the validation of methods for detection and quantification of nanoparticles in food samples is outlined, proposing validation of identity, selectivity, precision, working range, limit of detection and robustness. Expand