Effects of pore water velocity on the transport of arsenate

Article Abstract:

Increases in pore water velocity trigger increases in arsenate recovery in column effluent and increases in model-fitted sorption rate parameters. This indicates that nonequilibrium processes are important for the accurate description of AsO4 transport. A study of the effects of pore water velocity on arsenate transport which sought to establish the applicability of two equilibrium adsorption models and two simple kinetic adsorption models found the nth-order kinetic sorption model to sufficiently describe observed AsO4 breakthrough curves when the rate parameters and reaction order were allowed to vary with pore water velocities.

Research, Analysis, Arsenic compounds, Water, Chemical reaction, Rate of, Chemical kinetics, Water analysis

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Alternative model for cationic surfactant adsorption by layer silicates

Article Abstract:

An alternative model for cationic surfactant adsorption was constructed to determine the potential of cationic surfactants such as quaternary ammonium compounds (QAC), particularly hexadecyltrimethylammonium, in remediation of contaminated soils. Results showed that the model accurately described QAC adsorption under a variety of solution conditions.

Models, Usage, Measurement, Pollution, Environmental monitoring, Soil absorption and adsorption, Absorption, Soil science, Surface active agents

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