Publications by authors named "Brooke N Gray"
Single-solute batch kinetic and isotherm experiments were conducted in Type 1 (18.2 MΩ·cm resistivity) water supplemented with 10 mM carbonate buffer (pH 7.75, 25 °C) for nine drinking water relevant perfluoroalkyl chemicals and three bituminous-coal based granular activated carbons (GACs).
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- - The study assessed how selective certain drinking water-related PFAS compounds are for chloride ions using three types of anion exchange resins, focusing on low concentrations relevant to drinking water (≤500 ng/L).
- - Results showed that most PFAS behaved according to traditional ion exchange principles, with selectivity increasing with both PFAS carbon chain length and chloride concentrations, while maintaining a much higher selectivity than inorganic anions like nitrate.
- - A competition experiment confirmed that selectivity values for individual PFAS could be used in a multisolute context, paving the way for improved models in water treatment processes involving PFAS.
A coconut shell (AC1230CX) and a bituminous coal based (F400) granular activated carbon (GAC) were ground with mortar and pestle (MP), a blender, and a bench-scale ball milling unit (BMU). Blender was the most time-efficient for particle size reduction. Four size fractions ranging from 20 × 40 to 200 × 325 were characterized along with the bulk GACs.
View Article and Find Full Text PDFWhen implementing anion exchange (AEX) for per- and polyfluoroalkyl substances treatment, temporal drinking water quality changes from concurrent inorganic anion (IA) removal can create unintended consequences (e.g., corrosion control impacts).
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