Sorption of Cr(VI) by Amberlite XAD-7 resin impregnated with brilliant green and its determination by quercetin as a selective spectrophotometric reagent

Kinetics, equilibrium and thermodynamic study of Cr(VI) sorption into toluidine blue o-impregnated XAD-7 resin beads and its application for the treatment of wastewaters containing Cr(VI)

“…Concentration of Cr(VI) in the aqueous solution was estimated spectrophotometrically by using quercetin as described in our previous work [28].…”

“…In the light of the requirements for the search of a simple and effective method for removal of Cr(VI) from the wastewaters and in the following of our previously group works in the context of EIRs application on removal, separation and preconcentration of metal ions [25][26][27][28], this work has been designed to prepare a selective anion-exchange resin containing TBO via the impregnation into high surface macroporous supports of Amberlite XAD-7, a copolymer backbone for the sorption of Cr(VI) from weakly acidic solutions. The present work is aimed to study the Cr(VI) removal kinetics and equilibrium between the Cr(VI) ions present in the aqueous solution and TBO into Amberlite XAD-7.…”

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

“…While for Cyanex 923-impregnated resins, they can adsorb Cr(VI) effectively when the solution pH is low, and the adsorption mechanism could be explained by taking into account that the interactions between the protonated oxygen atoms of polyacrylate (ester group) in the resins are combined and the organic solvent is solved with trioxochloromate (CrO 3 Cl -) complexes [77]. Commonly known cationic dyes, such as Brilliant Green (BG) [78] and toluidine blue O (TBO) [79], can also be used for the removal of Cr(VI). Figure 1.…”

Preconcentration and Determination of Fe(III) from Water and Food Samples by Newly Synthesized Chelating Reagent Impregnated Amberlite XAD-16 Resin

“…For the pH 1 and 2, a KCl/HCl solution was used. CH3COOH/CH3COONH4 buffer was used to adjust pH in the range of 3-6, while NH3/NH4Cl buffer was used for pH [8][9][10]. Synthesis of reagent.…”

“…Several studies have been reported for the XAD series resins which are impregnated with various reagents. [7][8][9][10][11][12] The large surface area of Amberlite XAD-16 resin (800 m 2 g -1…”