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Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity
We studied the fluorescence properties of fulvic acids isolated from streams and rivers receiving predominantly terrestrial sources of organic material and from lakes with microbial sources ofExpand
Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matter.
Aromatic carbon and the presence of specific aromatic compounds resulted in EEMs that aided in differentiating wastewater effluent DOM from drinking water DOM, and the highest cumulative EEM volume was observed for hydrophobic neutral DOM fractions. Expand
Fate of endocrine-disruptor, pharmaceutical, and personal care product chemicals during simulated drinking water treatment processes.
Conventional treatment would have low removal of many EDC/PPCPs, while addition of PAC and/or ozone could substantially improve their removals, and existing strategies that predict relative removal of herbicides, pesticides, and other organic pollutants can be directly applied. Expand
Titanium dioxide nanoparticles in food and personal care products.
This research showed that, while many white-colored products contained titanium, it was not a prerequisite and testing should focus on food-grade TiO(2) (E171) rather than that adopted in many environmental health and safety tests (i.e., P25), which is used in much lower amounts in products less likely to enter the environment. Expand
Nanoparticle silver released into water from commercially available sock fabrics.
Variable leaching rates among sock types suggests that the sock manufacturing process may control the release of silver, and physical separation and ion selective electrode (ISE) analyses suggest that both colloidal and ionic silver leach from the socks. Expand
Titanium nanomaterial removal and release from wastewater treatment plants.
Titanium (Ti) occurs naturally in soils and as highly purified titanium dioxide (Ti5O2) in many commercial products that have been used for decades and is monitored in environment where WWTP liquid effluent is discharged or biomass disposed to increase knowledge on the fate and transport of other nanomaterials in the environment. Expand
Pharmaceuticals, Personal Care Products, and Endocrine Disruptors in Water: Implications for the Water Industry
For over 70 years, scientists have reported that certain synthetic and natural compounds could mimic natural hormones in the endocrine systems of animals. These substances are now collectively knownExpand
Impact of natural organic matter and divalent cations on the stability of aqueous nanoparticles.
Among all the studied nanoparticles, SiO(2) exhibited the unique stability due to its low NOM adsorption capacity and small Hamaker constant, and remained stable no matter whether the solution contained NOM or Ca(2+). Expand
Relationships between the structure of natural organic matter and its reactivity towards molecular ozone and hydroxyl radicals
Abstract Oxidation reaction rate parameters for molecular ozone (O3) and hydroxyl (HO) radicals with a variety of hydrophobic organic acids (HOAs) isolated from different geographic locations wereExpand
Antimony leaching from polyethylene terephthalate (PET) plastic used for bottled drinking water.
Nine commercially available bottled waters in the southwestern US (Arizona) were purchased and tested for antimony concentrations as well as for potential antimony release by the plastics that compose the bottles, finding only a small fraction of the antimony in PET plastic bottles is released into the water. Expand