Abstract: Analytical solutions to the one‐dimensional advection‐dispersion equation are presented for several cases where the source concentration is either input continuously at a periodically fluctuating level or input as a single ...

Abstract: The adsorption‐diffusion rate of a humic acid and three molecular size fractions thereof by two particle size fractions of activated carbon was investigated over an extended time period. Long‐term removal of humic substances ...

Abstract: The removal of dissolved organic carbon (DOC) by granular activated carbon (GAC) in a fixed‐bed adsorber was simulated using an approximate analytical solution and was found to agree satisfactorily with the performance ...

Abstract: Disinfection with chlorine dioxide was compared to disinfection with chlorine in wastewater from three treatment sequences: (1) Conventional activated‐sludge treatment; (2) activated‐sludge/nitrification; and (3) ...

Abstract: Ground-water aquifers are an important source of water for domestic, agricultural, and industrial use, but they are often contaminated by hazardous chemicals. In this note, the writers consider the transport of a sorbing ...

Abstract: The experimental in situ aquifer biorestoration site at Moffett Field, California, is a small, confined, sand and gravel aquifer, interspersed with layers of silts and clays. Laboratory sorption and solids characterization ...

Abstract: External mass‐transfer coefficients are measured with organic compounds, p‐nitrophenol and 2,4‐dichlorophenol, under conditions representative of fixed‐bed activated‐carbon adsorption for water treatment. The superficial ...