Modification of Amberlite Ira 400 (CL-) by Incorporating Alizarin S and Sodium Morpholyldithiocarbamate (Mordtc) Respectively (original) (raw)
Related papers
2007
The sorption properties of the commercially available cationic exchange resin, Amberlite IRC-718, that has the iminodiacetic acid functionality, toward the divalent metal-ions, Fe 21 , Cu 21 , Zn 21 , and Ni 21 were investigated by a batch equilibration technique at 258C as a function of contact time, metal ion concentration, mass of resin used, and pH. Results of the study revealed that the resin exhibited higher capacities and a more pronounced adsorption toward Fe 21 and that the metal-ion uptake follows the order: Fe 21 > Cu 21 > Zn 21 >Ni 21. The adsorption and binding capacity of the resin toward the various metal ions investigated are discussed.
Ligands Sorption Studies on Transition Metal Ion Loaded Amberlite IRC-50
Langmuir, 1998
Ligands sorption of ammonia, diethanolamine, and triethanolamine on the cation exchanger Amberlite IRC-50 having Cu 2+ , Ni 2+ , and Zn 2+ ions was studied as a function of temperature 290-318 K and different initial concentrations 1-500 mmol‚L -1 . Sorption was found to follow the order Cu 2+ > Zn 2+ > Ni 2+ and ammonia > diethanolamine > triethanolamine. Desorption of metal cations from the exchanger to the aqueous phase was also observed when the temperature of the system was increased. The results were explained in terms of ligand sorption and ion exchange, which were found to be dependent upon the stabilities of the complexes inside the resin and in the aqueous solution and the basicity and hydrophobicity of the ligand involved. The ratio of metal released/amine sorbed was determined which indicated two possible mechanisms of ligand sorption. The data were explained with the help of mass action law. IR studies also confirmed the presence of metal complexes and metal-amine complexes inside the resin.
New generation Amberlite XAD resin for the removal of metal ions: A review
The direct determination of toxic metal ions, in environmental samples, is difficult because of the latter's presence in trace concentration in association with complex matrices, thereby leading to insufficient sensitivity and selectivity of the methods used. The simultaneous removal of the matrix and preconcentration of the metal ions, through solid phase extraction, serves as the promising solution. The mechanism involved in solid phase extraction (SPE) depends on the nature of the sorbent and analyte. Thus, SPE is carried out by means of adsorption, ion exchange, chelation, ion pair formation, and so forth. As polymeric supports, the commercially availableAmberlite resins have been found very promising for designing chelating matrices due to its good physical and chemical properties such as porosity, high surface area, durability and purity. This review presents an overview of the various works done on the modification of Amberlite XAD resins with the objective of making it an efficient sorbent. The methods of modifications which are generally based on simple impregnation, sorption as chelates and chemical bonding have been discussed. The reported results, including the preconcentration limit, the detection limit, sorption capacity, preconcentration factors etc., have been reproduced.
Biokemistri, 2011
Simple quantitative technique has been developed for assessing the exchange parameters of Amberlite IR-45 (OH) using column chromatographic techniques from the displacement of exchangeable hydroxyl ions of the resin by sulphate ions. The results obtained showed retention time of 33min, retention volume of 56.5cm 3 , void volume of 18cm 3 , and exchange capacity of 41mmole/g and exchange site density of 2.4682 x 10 22 sites /g.
Cation exchange effective equilibrium distribution coefficients(K' d ) of 18 metal ions with resin Amberlite IR-120 have been determined in varying adipic acid [H 2 AA] concentrations, viz., 2.0×10 -2 _ 7.6×10 -2 M [H 2 AA]. Separation factors of metal ion species were calculated and some possible binary separations were worked out on the basis of their K' d values. An entirely different approach has been proposed for the association of adipate anion involving its partial exchange with the resin site along the complexation of the metal species.
Talanta, 2002
A chelating type ion exchange resin (Amberlite IRC-718), containing iminodiacetate groups as active sites, has been characterized regarding the sorption and subsequent elution of Cd, Zn and Pb, aiming to metal preconcentration from solution samples of different origins. The methodology developed is based on off-line operation employing mini columns made of the sorbent. The eluted metals were determined by flame atomic absorption spectrometry. The effect of column conditioning, influent pH and flow rate during the sorption step, and the nature of the acid medium employed for desorption of the retained metals were investigated. Working (breakthrough) and total capacities were measured under dynamic operating conditions and the results compared with those obtained with Chelex-100, a resin extensively employed for analytical preconcentration. Structural information on the complexation of metals by the chelating groups was obtained by Fourier Transform infrared spectrometry. The analytical response of the Amberlite sorbent was assessed for the analysis of water samples and digestates of marine sediments.
Evaluation of chromium(VI) sorption efficiency of modified Amberlite XAD-4 resin
Arabian Journal of Chemistry, 2017
The present work deals with the removal of Cr(VI) from aqueous media by modified Amberlite XAD-4 (MAX-4) resin through the solid phase extraction method. Different parameters such as pH, dosage and temperature were optimized during the batch experiment. The experimental data were analyzed by Freundlich, Langmuir, Dubinin-Radushkevich (D-R) and Temkin equilibrium isotherms. Each characteristic parameter of isotherms was determined. The kinetic sorption experiments show that the sorption process follows pseudo second order kinetics. The sorption mechanism was investigated by Reichenberg (R-B) and Morris-Weber equations. From the thermodynamic parameters, it could be concluded that the sorption process is endothermic and spontaneous in nature. The interference and desorption studies were also performed. The results show that MAX-4 resin has the capability to remove Cr(VI) significantly from aqueous media even in the presence of interfering ions.
In this paper, we studied the feasibility of using La(III)-, Ce(III)-, Y(III)-, Fe(III)-and Al(III)-loaded 200CT resin as adsorbents for the removal of As (III and V) from aqueous solution. The effects of the contact time, pH of solution and initial concentration of solution on the removal of As(III and V) were investigated in a batch system in order to explain the adsorption mechanism. The removal of As(III and V) by using metal(III)-loaded 200CT resins are strictly pH-dependent. The reaction mechanism was discussed and followed an ion exchange adsorption mechanism. The kinetics of As(III) adsorption with Y(III)-200CT and As(V) adsorption with Fe(III)-200CT can be described well by the pseudo-first-order and second-order models. The equilibrium adsorption data were fitted by four isotherm models. The fitting results suggested that the Y(III)-and Ce(III)-200CT resins are better adsorbents for the As(III) adsorption and the maximum uptakes are 0.4835 and 0.4592 mol/kg, respectively. And Fe(III)-200CT resin is the best adsorbent for the removal of As(V) with the maximum capacity of 1.450 mol/kg. The coexisting ion influence of PO 4 3− was bigger than SO 4 2− on the removal of As(III and V).