Adsorptions of heavy metal ions by a magnetic chelating resin containing hydroxy and iminodiacetate groups

Biosorption of benzidine based textile dyes “Direct Blue 1 and Direct Red 128” using native and heat-treated biomass of Trametes versicolor

“…There is an external surface mass transfer or film diffusion process that controls the early stages of the adsorption process. This may be followed by a reaction or constant rate stage and finally by a diffusion stage where the adsorption process slows down considerably [40,41]. Thus, the second order kinetic model was suitable for description of biosorption kinetics for the removal of DB-1 and DR-128 dyes from aqueous solution onto native and heat-treated biomass of T. versicolor.…”

Kinetics of mercury ions removal from synthetic aqueous solutions using by novel magnetic p(GMA-MMA-EGDMA) beads

“…There is an external surface mass transfer or film diffusion process that controls the early stages of the adsorption process. This may be followed by a reaction or constant rate stage and finally by a diffusion stage where the adsorption process slows down considerably [30][31][32][33].…”

“…At saturation, the concentration of Hg(II) ions in the effluent was same as the inlet Hg(II) ions concentration. The driving force for adsorption is the concentration difference between the Hg(II) ions on the adsorbent and the Hg(II) ions in the solution [6,[32][33][34][35]. Thus, the high driving force due to high Hg(II) ions concentration resulted in a better performance in the continuous system.…”

Development of Polymeric and Polymer‐Based Hybrid Adsorbents for Chromium Removal from Aqueous Solution

“…The most important factors causing environmental pollution are wastewater and water pollution. In recent years, environmental contamination with heavy metal ions has been of growing public concerns because of their toxicities in relatively low concentration and tendency to bio-accumulate [1]. Chromium, which is on the top-priority list of toxic pollutants defined by the U.S. Environmental Protection Agency (EPA), exists in nature mainly in two oxidation states and occurs most frequently as Cr(VI) or Cr(III) in aqueous solutions [2].…”