The present study was carried out to investigate the potential of carboxylate group functionalized Multi-walled carbon nanotubes (MWCNT−COOH) adsorbent for the removal of Methyl orange (MO) textile dye from aqueous solutions. The effects of pH, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚K was fixed at 25 min. The effect of te...

This work describes the synthesis of a novel magnetic graphene oxide composite for removal of Cr(VI) ions. The synthesized nanosorbent were characterized with various techniques such as FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), elemental analysis and vibrating sample magnetometry (VSM). This material is illustrated to represent a viable sorbent for the removal of Cr(VI...

Simulation of chemical element adsorption, release, and transport is possible without the need to perform time consuming, detailed adsorption studies on multiple samples by incorporating prediction equations into chemical speciation–transport models before simulating. Adsorption models also assume that the chemical species in a mixture is at chemical equilibrium which is the state in which the ...

w Kinetics and mechanisms of selenate and selenite adsorption/desorption a t the goethitelwater interface were studied by using pressure-jump (p-jump) relaxation with conductivity detection at 298.15 K. A single relaxation was observed for selenate Se0:adsorption. This relaxation was ascribed to Se0,2on a surface site through electrostatic attraction accompanied simultaneously by a protonation ...

The adsorption potential of clay and sandy soil to remove benzene from liquid-phase system was examined. A series of batch adsorption tests were carried out for various concentrations of benzene (50 250 mg/l) in tightly corked 1000 ml flasks for clay and sandy soil, respectively. Equilibrium and kinetics data were obtained from the batch experiments. Adsorption increased with increasing initial...

Aqueous-phase edsorption equilibrium and kinetic mechanism of phenol, 3-chlorophenol rnd o-cresol onto Norit Granular Activaied Caibon (NAC 1240) were studied in a batch system at temperature of 30 oC, agitation speed of 120 rpm, initial phenol concentrations of 25-200 mg/t. The elfects of initid phenol concentration and time of adsorption on phenol adsorption process were lnvestigated. The ads...

A series of batch and column laboratory experiments were conducted to determine adsorption coefficients of mercury (II) for Oak Ridge Reservation (ORR) soil. The experimental setup used soil collected from an area offsite of the ORR, in a location upstream of East Fork Poplar Creek (EFPC). The batch equilibrium experiments were conducted in the range of 600 to 5,000 μg/L of initial Hg(II) conce...

Suppose we flow through an adsorption or chromatograph column so fast that the adsorption is not at equilibrium at a given point in the column. This departure from equilibrium could be either due to diffusion resistance within the porous particles of the column or due to kinetic limitation of the adsorption process. Alternatively, you may wish to separate different size macromolecules by the di...

the present study was carried out to investigate the potential of carboxylate group functionalized multi-walled carbon nanotubes (mwcnt−cooh) adsorbent for the removal of methyl orange (mo) textile dye from aqueous solutions. the effects of ph, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚k was fixed at 25 min. the effect of te...