Co-Ion Effect on Cr3+ Sorption by Amberlyst-15(H+)

Abstract

Cr 3+ sorption on strong acid exchanger Amberlyst-15(H + ) is studied as a function of time and temperature using CrCl 3 .6H 2 O and [Cr 4 (SO 4 ) 5 (OH) 2 ] solutions. The rate is found to be governed by a mixed diffusion for both the solutions and faster for Cl 1− solution than SO 4 2− . The exchange capacities are found to be higher for Cl 1− system than SO 4 2− . From the rate constant values, the energies of activation are calculated using the well-known Arrhenius equation. Equilibrium data is explained with the help of the Langmuir equation. The Langmuir parameters are also found to be higher for exchange from the chloride solutions. Various thermodynamic parameters (ΔH o , ΔS o , and ΔG o ) for Cr 3+ exchange on the resin are calculated. The ΔG o values are found to be negative while ΔH o and ΔS o are positive for both the Cr 3+ /Cl 1− and Cr 3+ /SO 4 2− systems. It is suggested that in case of Cl 1− solutions, the metal is exchanged as Cr 3+ , while in case of SO 4 2− solutions, the metal exchanging specie is CrSO 4 + .

Forward Osmosis: Potential use in Desalination and Water Reuse

“…As a result, the specific power consumption was the highest when MgSO 4 was used as a draw solution (Figure 9). Furthermore, the diffusion of SO 4 ions is lower than Cl which may aggravate the intensity of concentration polarization of MgSO 4 draw solution [29,30].…”

An advanced Cr(III) selective nano-composite cation exchanger: Synthesis, characterization and sorption characteristics

“…Hybrid inorganic-organic alumina functionalized with purpurogallin has been employed for removal and preconcentration of Cr(III) from underground water [14]. The chromium(III) has also been removed from tannery wastes using Amberlite IR 400 and its hybrids [15]. In addition, biomass waste generated from large scale fermentation process has been used as adsorbent for removal of Cr(III) from tannery effluent.…”

Removal of Cr(III) from Acid-Dissolution Water of Chromium Sludge by Cation Exchange Resin

“…[18,19]. It was recently studied that solutions containing Cr 3+ ion were treated with strong cation exchangers Amberlite IR-120, Amberlyst-15(H + ) and Indion 790, and weak acid exchanger Amberlite IRC-50 (Na), the result obtained showed that the resin has a strong affinity for these ions [13,[20][21][22][23][24]. However, recovery Cr(III) from acid-dissolution water of chromium sludge by ion exchange resin reported rarely.…”