Heavy and toxic metal uptake by mesoporous hypercrosslinked SMA beads: Isotherms and kinetics

Biosorption Characteristics of Mn (II) by Bacillus cereus Strain HM-5 Isolated from Soil Contaminated by Manganese Ore

“…For instance, at low pH, cell wall ligands tightly bind with the hydronium ions H 3 O -and hence restrict the approach of metal cations due to repulsive force. On the contrary, at higher pH values, the metal ions on the cell surface may form hydrogen and oxygen chemical precipitation, which can affect the cell enzyme and other carriers to help transport, thus affecting the adsorption of bacteria and causing bacteria for a metal ions adsorption rate decrease [34,[39][40]. Similar results have been reported by others [16,41].…”

Kinetic and isotherm analysis for selective thorium(IV) retrieval from aqueous environment using eco-friendly cellulose composite

“…The nano-iron oxide (Fe 2 O 3 )-impregnated cellulose acetate beads used for the adsorption process were synthesized (Ayalew et al 2012;Gonte et al 2013a) by dissolving the requisite amount of cellulose acetate, NaCl and NaOH in 1:2 ratio of DMA/acetone solution to obtain a homogenous mixture. Five different compositions were prepared by varying the nano-iron oxide (Fe 2 O 3 ) content from 2 to 8 wt%.…”

“…The adsorption isotherm indicates how the adsorption molecules distribute between the liquid phase and the solid phase when the adsorption process reaches an equilibrium state. The adsorption mechanism and adsorbent's affinity for the metal ion can be determined by analysing the physicochemical parameters (Bulut et al 2008;Febrianto et al 2009;Gonte et al 2013b;Gonte and Balasubramanian 2013). There are several isotherm equations available for analysing experimental adsorption equilibrium data.…”

“…Several adsorption isotherms originally used for gasphase adsorption are available and readily adopted to correlate adsorption equilibria in heavy metals adsorption. Some well-known ones are Freundlich, Langmuir, Temkin, Redlich-Paterson and Sips equations (Febrianto et al 2009;Gonte et al 2013b;Gonte and Balasubramanian 2013). In this study, the experimental equilibrium data for adsorbed metal ions onto nano-iron oxide (Fe 2 O 3 )-impregnated cellulose acetate beads were analysed using the Langmuir, Freundlich, Temkin and D-R models.…”

“…The extrapolated value of log x/ m for C e = C 0 gives the maximum adsorption capacity (Gonte and Balasubramanian 2013;Aksu 2002;Hall et al 1966). The value of n and K F can be determined by plotting a graph between log q e and log C e and analysing the slope and intercept of the curve (Fig.…”