Competitive adsorption of trace organics on membranes and powdered activated carbon in powdered activated carbon-ultrafiltration system

Abstract

An activated carbon adsorption model was developed to predict final permeate concentrations of a target trace organic compound (o-dichlorobenzene, DCB) under the variable influent concentration in powdered activated carbon-ultrafiltration (PAC-UF) system for drinking water production. The results were then compared with experimental DCB concentrations both in bulk and permeate. In the adsorption period, the DCB concentrations both in bulk and permeate were always lower than the predicted ones while the permeate concentrations were lower than the bulk ones regardless of membrane materials used and PAC doses. On the other hand, during the desorption period, the experimental values were higher or lower than the predicted ones depending on PAC dose and membrane used. The competitive adsorption and/or desorption of DCB between PAC and membrane itself resulted in this discrepancy, and this trend was more pronounced in a hydrophobic membrane.

Composite Hybrid Membrane Materials for Artificial Organs

“…This is the case of carbon nanotubes or graphenes which are not soluble in aqueous solution at physiological pH. The hybrid membranes are obtained by dispersing the inorganic fillers in the polymer solution by sonication followed by preparing the membrane using phase inversion, evaporation of the solvent, or extrusion [7][8][9][10].…”

Effect of operating parameters in a submerged membrane adsorption hybrid system: experiments and mathematical modeling

“…The performance of the membrane-adsorption hybrid system depends on reactor configuration, operating modes, carbon dose, carbon adsorptive characteristics and computed by using continuously stirred tank reactor (CSTR) model and plug-flow reactor (PFR) model, both of which are based on the homogeneous surface diffusion model (HSDM) [8,9,10,11]. Campos et al [12,13] proposed a mathematical model to predict the removal of organic compounds when PAC was applied to various membrane reactor configurations and operations.…”

Removal of sodium dodecyl benzene sulfonate and phenol from water by a combined PAC adsorption and cross‐flow microfiltration process

“…The removal of trace levels of dissolved organic matters such as atrazine, dichlorobenzene, humic acids, and trichlorophenol from surface and ground waters using PAC–MF or PAC–UF has been extensively studied 8–19. This process has been also applied to remove organic pollutants such as phenol, aniline, and trichloroethylene from industrial effluents 18, 20, 21.…”