Acid Cation Exchange Research Articles

Silver nanoparticles embedded cation-exchange membrane for remediation of Hg species and application as the dip catalyst in organic transformation

Silver nanoparticles (Ag NPs) embedded in poly(perfluorosulfonic) acid cation-exchange membrane (Nafion-211) were synthesized by in situ reductions of Ag+ ions by sodium borohydride at room temperature and formamide at 65 °C. The formamide-reduction formed Ag NPs uniformly distributed in the membrane matrix. Therefore, the formamide-reduced Ag NPs embedded membranes were used for the sorption-preconcentration of Mercury (Hg)2+ ions by the galvanic reaction with Ag NPs in the membrane matrix. The replacement of Ag0 in NPs with Hg2+ ions resulted in the formation of Hg0 accumulated as nanodroplets in the membrane matrix as indicated by the field emission scanning electron microscopy studies. The sorption of Hg2+ ions via galvanic reaction in the Nafion membrane was found to be maximum (>93%) from pH = 2.5 to pH = 6.5. The Ag NPs embedded membrane was studied for Hg2+ ions sorption from the aqueous samples by radiotracer (203Hg), spectrophotometry, energy dispersive X-ray fluorescence and cold vapor atomic absorption spectrophotometry. This membrane was successfully applied for the determination and quantification of Hg2+ ions in the real water samples and safe storage of Hg for the remediation objective. The Hg0 embedded membrane was also found to be promising as the dip catalyst in the representative organic transformation of phenylacetylene to acetophenone. The Hg0 embedded membrane dip catalyst was reused in four consecutive cycles under similar conditions and found to be successful by giving an almost similar yield (%) of the product. This demonstrated a possibility of safe application of Hg0 stored in the matrix of poly(perfluorosulfonate) membrane for catalysis.

Comparative studies on the adsorption of various radioactive nuclides from waste aqueous solutions on graphene oxide, inorganic and organic ion exchangers

Abstract Adsorption of the radionuclides 141Ce, 140La, 140Ba, 137+134Cs, 131I, 125Sb, 103Ru, 95Nb and 95Zr are studied on graphene oxide from waste aqueous solution samples and their adsorption behaviors are compared to that on the inorganic ion exchanger Ceric tungstate as well as on the strong acidic cation exchanger Dowex-50X8 H+ form, the chelating resin Chelex-100 Na+ form and the strong basic anion exchanger AG-1X8 Cl− form. The waste samples are dilute aqueous solutions resulting from previous work. These solutions contained neither oxidizing nor reducing agents, consequently, it is expected that these radionuclides are existing in their most stable oxidation states, i.e. Ce(III), La(III), Ba(II), Cs(I), Ru(III) & (IV), Sb(III) & (V), Nb(V) and Zr(IV). The adsorption is studied under static conditions for all these radioactive nuclides in the presence of each other. Gamma radiometric analysis is carried out for these radionuclides. Effect of some factors on the adsorption is studied such as pH, graphene oxide particle sizes, contact time, temperature and other parameters. Complete removal of some radionuclides is achieved from these waste solutions by adsorption on graphene oxide. Some separation alternatives for some of these radionuclides are also achieved.

Simultaneous removal of silica and TOC from steam assisted gravity drainage (SAGD) produced water using iron-hydroxide-coated walnut shell filter media

Extracting Alberta’s bitumen by SAGD requires a growing supply of steam, which is mainly generated from recycled produced water (PW). Traditionally, a warm lime softener (WLS), followed by walnut shell filter (WSF) and weak acid cation exchange (WAC) units have been employed to minimize the concentrations of silica, TOC, and hardness from PW. In this study, we enhanced TOC and silica removal in a WSF unit by modifying the surface of the walnut shell media. The walnut shells were modified by anchoring low mass percentages (e.g., < 5 wt%) of iron(hydroxide) nanoparticles under moderate hydrolysis conditions. The nanoparticle-anchored walnut shell particles (WS-NPs) were fully characterized, and their ability to remove TOC and silica was tested using batch and column experiments. In the batch tests, up to 85 % of silica and TOC was removed. In the column tests, which mimicked industrial operations, WS-NPs significantly improved the breakthrough behavior without reaching pressure drop limitations. The column breakthrough behaviors were successfully described by a dimensionless advection-axial dispersion model. The model accurately captured the commercial breakthrough behavior, indicating the possibility of scaling up the filter using a combined unit that removes silica and TOC simultaneously without using WLS and WAC.

Sorption of Pyridine-3-carboxylic Acid by Fe-Containing Sulfonic Acid Cation Exchanger KU-2

Sorption of Pyridine-3-carboxylic Acid by Fe-Containing Sulfonic Acid Cation Exchanger KU-2

Recovery of rare earth elements from uranium leach liquors by adsorption with diglycolamic acid ligands and ionic liquids

A series of extraction chromatographic resins containing various phosphorus-containing and DGA-based extractants and ionic liquids was synthesized and their sorption characteristics for rare earth elements (REE) in sulfate solutions were studied. The effects of the type and content of ionic liquid in the stationary phase as well as solid support type on the sorption capacity of the resins for La, Nd and Dy were evaluated. It was shown that the quantity of the stationary organic phase in the resins was 30–35% independent of the matrix type. In the case of the DODGAA: TODGA: [C4mim][Tf2N] system, the matrix type did not affect the resin capacity for REE in sulfuric acid solutions. Acidity of the aqueous phase was one of the most important factors affecting lanthanides sorption from sulfate solutions. The capacity of the sorbents for lanthanides decreased sharply with the increase of acidity of the solution, this decrease was stronger for light REE. The process of REE separation from uranium leach liquors was studied using real leach liquors after separation of uranium. It was shown that a resin based on hydrophobic silica gel impregnated by DODGAA:TODGA:[C4mim][Tf2N] mixture can be recommended for concentration and primary separation of lanthanides from multicomponent industrial solutions. The advantage of this sorbent is a high selectivity for REE over macro amounts of Al and Fe as compared with strong acid cation exchange resins and phosphorus-containing organic extractants, which are widely used for preconcentration. Using this sorbent for selective recovery of REE from uranium leach liquors provided concentration factors of 10–15 for light REE group and 150–300 for heavy REE group.

Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane.

This work reports the application of an electromembrane process, Donnan dialysis (DD), for the purification of so-called wet-process phosphoric acid (WPA). Nitric acid is used as the stripping solution to remove metallic cations (mostly Fe3+, Al3+, and Mg2+) that are harmful to the further processing of WPA. The paper first presents a set of experimental data on the measurements of the metallic cation fluxes through a perfluorinated sulfonic acid cation-exchange membrane. Not only WPA, but also synthetic phosphoric acid solutions with mixed metallic cations (MPA) and with a single metallic cation (SPA) were studied. This confrontation confirms (1) that the order of metallic cations fluxes is Mg2+ > Al3+ > Fe3+; (2) that, compared with MPA, the purification effect of WPA causes only negligible change; (3) that, by comparing the DD processes with SPA and MPA solutions, the reason for the low transmembrane fluxes of Fe3+ and Al3+ could be explained by the large ionic charge and large hydrated ion radius. Furthermore, by analyzing the ion composition of membranes equilibrated in SPA solutions, we conclude that the forms of cations in the membrane are most likely Fe3+, Al3+, and Mg2+.

Cross-linked poly(vinyl alcohol)/sulfosuccinic acid (PVA/SSA) as cation exchange membranes for reverse electrodialysis

To develop the suitable and cost-competitive membranes, the cross-linked poly(vinyl alcohol)/sulfosuccinic acid (PVA/SSA) cation exchange membranes (CEMs) were prepared and their potential as feasible reverse electro-dialysis (RED) CEMs was evaluated experimentally. Results proved after the thermal treatment at the cross-linking temperature of 120 ℃, the custom-made membranes exhibited the most favorable electrochemical characteristics. The PVA/SSA CEM with 20 wt% SSA in polymer blends had more advantages in the RED process because of the excellent mechanical and transport properties. Furthermore, the results presented that the stack with the custom-made CEMs with 20 wt% SSA content had similar maximum power density (1.022 W m−2) to that with the excellent commercial CEMs (Selemion CMV) (1.072 W m−2) in the same RED configuration, although the PVA/SSA CEMs possessed the relatively low permselectivity. Besides, the PVA CEMs had the lower stack resistance and non-ohmic resistance compared with the Selemion CMV CEMs.

Removal of Zn2+ from polyethylene terephthalate (PET) glycolytic monomers by sulfonic acid cation exchange resin

Glycolysis of polyethylene terephthalate (PET) has always been a research hotspot in PET waste recovery due to its high efficiency and sustainability. Zinc acetate (ZnAc2•2H2O) and urea/(ZnAc2•2H2O) are usually regarded as the most promising catalysts for the glycolysis of PET, while the residue of Zn2+ in glycolytic monomers (bis(hydroxyalkyl) terephthalate (BHET)) was identified as a big hassle, which caused the detrimental effect on the chromaticity of down-stream product. However, the removal of Zn2+ from BHET has almost not been reported previously. In the present work, ion exchange was adopted as effective measure to eliminate trace Zn2+ from BHET and more than 99% of Zn2+ can be removed by 001*7 sulfonic acid resin with resin dosage of 1.6 g/L at 298.15 K, 160 rpm for 120 min. Additionally, based on prevailing adsorption kinetics, isotherms, thermodynamic models and various precise instruments, comprehensive adsorption mechanism were exploited. Pseudo-second-order model (R2 > 0.999) and Langmuir model (R2 > 0.999) were found to match well with the experimental data, indicating the sorption of Zn2+ on 001*7 was homogeneous monomolecular layer adsorption and dominated by chemisorption. The thermodynamic model revealed the sorption was thermodynamically spontaneous. Fourier-Transform Infrared Spectroscopy (FTIR) illuminated the sulfonic acid groups on 001*7 resin were the main binding sites for Zn2+. X-ray Photoelectron Spectroscopy (XPS) elucidated ion exchange and electrostatic interaction between the sulfonic acid groups and Zn2+ were responsible for the sorption of Zn2+. All the results obtained can prove 001*7 sulfonic acid resin is an efficient material for removal of Zn2+ from BHET.

Synthesis and properties of ion-exchange materials based on hydrolysis lignins

Hydrolytic lignin is a large-tonnage waste product of ethyl alcohol production and is a renewable resource. The structure of lignin is characterized by the presence of a large number of hydroxyl groups, which provides the value of lignin as a raw material for synthesis in polymer chemistry. But due to their low chemical stability in dilute alkalis, acids and solvents, lignins are of little use for wide practical use. The introduction of additional functional groups into the lignin maromolecule by oxidative modification with the use of resource-saving technologies makes it possible to obtain new products for the synthesis of composite materials. On the basis of electrochemically modified lignin in polycondensation reactions with phthalic acid, ion-exchange materials have been obtained: weakly acidic cation exchangers with a exchange capacity of 0.1 mol/l NaOH 3.5-3.8 mmol/cm3, capable of sorbing cations in a wide range of pH values, and ampholyte (exchange capacity for sodium cation 6.4-6.6 mmol/cm3, for chlorine anion - 1.1-1.3 mmol/cm3). Ion exchangers synthesized on the basis of chlorine and nitro-containing lignins have been investigated in comparison with generally known industrial ion exchangers; they have high exchange and physic-mechanical characteristics and chemical resistance.

Application of Ion Exchange Resin in the Advanced Treatment of Condensate Water

The advanced treatment of condensate water is important for efficient reuse of water resources, especially in confined space. In this work, a novel integrated process of ion exchange resins and activated carbon is proposed to remove various pollutants in condensate water. A fixed bed column of pre-treated basic anion exchange resin, acidic cation exchange resin, mixed ion exchange resins and modified activated carbon was applied to remove ionic pollutants, organic pollutants and adjust the pH value of output water. The effects of the types, amount ratios and the sequence of ion exchange resins were investigated using two types of condensate water. The results showed that the output water of the fixed bed column had an average TOC of 30~70 ppm, conductivity under 5 μS/cm, pH value of 5~8, which could meet the requirements of sanitary water. The saturated adsorption capacities of the basic anion exchange resin and the acidic cation exchange resin were calculated to be 0.87 mol/L and 1.82 mol/L, respectively. Under the actual operating conditions, continuous dynamic test was carried out over a condensate water treatment module consisting of two adsorption columns and four exchange columns to evaluate its real service life.

Soil assessment after chemical accidents using metabolic profiling and microbial community evaluation

This study investigated the effects of accidental contamination of soils with phenol, toluene, nitric acid, and hydrogen fluoride (HF) by simulating chemical leakage in the soil with/without rain and characterizing the resulting metabolites and microbial. In the case of acid leakage, pH and cation exchange capacity were decreased, and the content of fluoride ion was increased in case of HF leakage. Using mass spectrometry-based metabolomics analysis, phytosphingosine was detected as a distinguishing metabolite in soils contaminated with phenol and HF in rain conditions. Microbial communities were identified by 16s rRNA metagenome sequencing. Sphingomonas was one of the dominant species in soils contaminated with phenol and HF. These results suggest that phytosphingosine and Sphingomonas might be used as biomarkers to evaluate the status of soils contaminated with phenol or HF. Under simulated rain conditions, the species alpha-diversity index of soil microbes and the physicochemical properties of the soil indicated values close to those of the uncontaminated soil. Rain played an important role in the recovery of microbial and metabolic profiles after chemical accidents. Metabolic profiling and microbial community analysis can serve as a diagnostic tool for ecotoxicological research at chemical accident sites.

A facile modification of cation exchange resin by nano-sized goethite for enhanced Cr(VI) removal from water

ABSTRACT A novel macroporous strong acidic cation exchange resin (D001) modified by nano-sized goethite (nFeOOH@D001) was fabricated by using a facile ethanol dispersion and impregnation method, and its efficiency for Cr(VI) removal was tested thereafter. Due to the dispersing effect of ethanol, FeOOH particles of 20–150 nm were coated on the D001 surfaces. The nFeOOH@D001 obtained a Cr(VI) removal efficiency and capacity of 80.2% and 7.4 mg/g respectively, 5 times and 8 times higher than that of the pristine D001. The Cr(VI) removal by nFeOOH@D001 followed the pseudo second-order kinetics and the Langmuir adsorption model. Column experiments also demonstrated that the nFeOOH@D001 exhibited a much better ability to remove Cr(VI) as compared to the D001. Additionally, the nFeOOH@D001 showed a potential for reusability and renewability. The adsorbed nFeOOH@D001 could be easily desorbed by 0.1 M acetic acid and a reuse efficiency of 92.7% could be maintained after 4 desorption–adsorption cycles. The used nFeOOH@D001 could be eluted by 0.1 M HCl to remove nFeOOH, and the renewed D001 could be recoated by nFeOOH and achieved a regeneration rate of 97.8% for Cr(VI) removal. The above results indicated that nano-sized goethite modification is a promising method to endow D001 with the ability to remove Cr(VI) from water.

The role of intraparticle diffusion path length during electro-assisted regeneration of ion exchange resins: Implications for selective adsorbent design and reverse osmosis pretreatment

Inorganic membrane scaling is a major cause of process failure for reverse osmosis (RO). Pretreatment using selective ion exchangers can reduce membrane scaling by removing scale-forming ions such as calcium (Ca2+) and phosphate (P). Ca- and P-selective ion exchangers also enable calcium phosphate recovery via precipitation from spent regenerants enriched with both ions. However, conventional regeneration approaches require substantial chemical and energy inputs. In this study, we designed a RO pretreatment process using electro-assisted regeneration of a column train containing a hybrid anion exchanger (HAIX) and a weak acid cation exchanger (WAC) to selectively remove > 90% Ca2+ and P from synthetic secondary effluent. HAIX and WAC were regenerated using pH 11 catholyte and pH 3 anolyte produced via electrochemical water splitting. HAIX contains ferric oxide nanoparticles (FeOnp) in a parent strong base anion exchanger (SBA). By comparing P regeneration efficiency of HAIX and SBA, we identified that FeOnp dopants reduced intraparticle diffusivity by 85% from SBA to HAIX. However, HAIX exhibited faster column regeneration kinetics than SBA, potentially due to the shortened intraparticle diffusion path length caused by the surface-distributed P in saturated HAIX, which overcompensated for low intraparticle diffusivity. Regenerability enhancement caused by the reduced intraparticle diffusion path length was also confirmed by comparing WAC with shallow-shell WAC (SSWAC), which has surface-distributed carboxylate functional groups. We anticipate that this study will inform selective adsorbent design by identifying strategies to improve regenerability, facilitate process intensification by replacing chemical inputs with electricity, and enhance resource recovery from wastewater.

Stability & Kinetics of the Bipolar Membrane Interface: Implications for Electrochemical Technologies

Hybrids of acidic cation exchange membrane (CEM) and alkaline anion exchange membrane (AEM) electrolytes, known as bipolar membrane (BPM), are of interest to a host of electrochemical applications that range from galvanic and electrolytic to electrosynthetic systems. Hindering a more extensive establishment of BPMs into some of these devices are the characteristics of the interface, or junction, between the CEM and AEM materials. This junction must facilitate a low-loss ionic recombination or water dissociation process while also being able to withstand swelling, hydraulic, osmotic, and Maxwell stresses. We show that kinetics and stability of the BPM junction are coupled to the underlying material properties, membrane configuration, and operating conditions. We report material design guidelines as a roadmap for producing robust BPM interfaces.

Adsorption Thermodynamics and Kinetics of Resin for Metal Impurities in Bis(2-hydroxyethyl) Terephthalate.

Adsorption of heavy metals from degraded of Polyethylene terephthalate (PET) products by strong cation exchange resin AmberliteIR-120 under optimized conditions toward the selectivity removal of metals are in the following order: Al3+ > Zn2+ > Mg2+ > Fe2+ > Ni2+. Therefore, kinetic and adsorption isotherm models were applied for fitting experimental data. Comparatively, adsorption isotherm study revealed that Langmuir isotherm model better fits adsorption on surface of resin over than the Freundlich model. In summary, AmberliteIR-120 strong acid cation exchange resin can be used as an efficient adsorbent for heavy metals removal from depolymerized products bis(2-hydroxyethyl) terephthalate.

Seralite SRC-120 resin catalyzed synthesis of bis(indolyl)methanes using indoles and low/high boiling point carbonyl compounds under solvent free conditions

A highly inexpensive, and operationally simple seralite SRC-120 (strongly acidic cation exchange resin) catalyzed synthesis of 3,3′-bis(indolyl)methanes (BIMs) from indoles and low/high boiling point carbonyl compounds under solvent-free condition is reported. Synthesis of BIMs with low boiling point carbonyls at room temperature takes prolonged reaction time and give low yields at high temperature. The reported method overcomes these limitations and works remarkably well with low/high boiling point aldehydes/ketones in shorter reaction times (5–10 min) under microwave irradiation conditions and provides moderate to excellent yields (65–94%). Moreover, the recyclability of the catalyst for at least five times without notable loss in activity makes the whole process attractive and green protocol.

Синтез нанокомпозита гидроксид хрома (III) – катионообменник КУ-2-8

Работа посвящена получению нанокомпозита гидроксид хрома (III) – катионообменник по-средством включения Cr(OH)3 в матрицу сильнокислотного катионита. Гидроксидсодержащий ги-бридный катионообменник синтезировали на основе полимерного носителя с сульфоновокислыми ионообменными группами КУ-2-8, поэтапно переводя функциональные группы из натриевой в Сr3+-форму и осаждая гидроксид хрома (III) в зерно катионообменника раствором щелочи NaOH. Содер-жание хрома в нанокомпозите определяли по концентрации вышедших в раствор противоионов мето-дом прямой потенциометрии. Морфологию поверхности гибридных хром-полимерных гранул иссле-довали методом сканирующей электронной микроскопии. Элементный анализ состава скола нано-композита определяли методом рентгеновского энергодисперсионного микроанализа. Найдено, что поверхность гибридной гранулы однородна. Сера и натрий достаточно равномерно распределены по всему объему полимерных гранул за исключением внешнего слоя, обедненного этими элементами. Хром обнаружен не только в поверхностном слое гранулы толщиной 10–15 мкм, но и в объеме зерна, где его концентрация существенно ниже. Распределение хрома по объему зерна является неравно-мерным. Показано, что при переходе от периферии зерна к центру концентрация хрома экспоненци-ально снижается. Элементное картирование подтверждает, что хром находится в грануле катионооб-менника в окисленной форме. Предложен механизм формирования нанокомпозита гидроксид хрома (III) – катионообменник КУ-2-8 с сульфоновокислыми ионообменными группами. В ходе реакции ионообменного насыщения происходит переход ионита в Cr3+-форму. При подщелачивании реакци-онной среды осадок гидроксида хрома (III) локализуется вблизи поверхности катионообменника. Формирование осадка Cr(OH)3 в наноразмерных порах катионита препятствует диффузионному пере-носу ионов Cr3+ по направлению к его поверхности, в то время как Доннановское исключение не поз-воляет гидроксильным ионам в достаточной концентрации проникнуть достаточно глубоко в объем гранулы ионита. Показана возможность получения наночастиц модификатора (гидроксида хрома (III)) с неравномерным распределением в объеме гранулы, объединенных в агломераты микрометро-вого размера.

Mass transfer process and separation mechanism of four 5′-ribonucleotides on a strong acid cation exchange resin

5′-ribonucleotides including adenosine 5′-monophosphate (AMP), cytidine 5′-monophsphate (CMP), guanosine 5′-monophosphate (GMP) and uridine 5′-monophosphate (UMP) have been widely used in the food and pharmaceutical industries. This work focused on the assessment of mass transfer process and separation mechanism of four 5′-ribonucleotides and counter-ion Na+ on the strong cation exchange resin NH-1. The intraparticle diffusion was determined as the rate-limiting step for the mass transfer of AMP, CMP, GMP, and Na+ on the resin NH-1 through the Boyd model. Meanwhile, a homogeneous surface diffusion model (HSDM) combing ion exchange and physical adsorption was proposed and tested against adsorption kinetic data in the batch adsorption systems. The fixed-bed film-surface diffusion model based on the HSDM was then developed and successfully predicted the concentration profiles of 5′-ribonucleotides and the change of pH at the outlet of the fixed-bed in the dynamic adsorption and separation process. Finally, the separation mechanism of 5′-ribonucleotides was presented combining model prediction and experimental results. The separation of UMP, GMP and CMP were mainly based on their differences in isoelectric points, while that of AMP and CMP were lied with the discrepancy of their physical adsorption binding capacity with the resin NH-1.

Константы равновесия сорбции пиридинкарбоновых кислот сульфокатионитом полистирольного типа

The processes of sorption of pyridine-3-carboxylic (nicotinic) and pyridine-4-carboxylic (isonicotinic) acids by sulfonic acid cation exchangers of the polystyrene type (CU-2-4 and CU-2-8) from aqueous solutions with different pH values were studied. Analysis of the FTIR spectra of isonicotinic acid, isonicotinic acid sulfate, and CU-2-8 sulfonic cation exchanger filled with isonicotinic acid showed that pyridinecarboxylic acid is in the protonated form in the polymer phase. Experimental data of the equilibrium distribution of acids in the aqueous solution-cation exchange system have been obtained. The values of the equilibrium constants for ion exchange and ligand sorption processes involving various forms of pyridinecarboxylic acid, sulfonic cation exchanger, and protons were calculated. The equilibrium constants for the ion exchange of sulfocationite protons by pyridinecarboxylic acid cations from solution are in the range 3.3-4.4. The selectivity of sulfonic cation exchangers to cations increases in the sequences proton &lt; nicotinic acid cation &lt; isonicotinic acid cation. The values of the equilibrium constant for ligand sorption of molecules are 195-220 dm3/mol for isonicotinic acid and reach 320-330 dm3/mol for nicotinic acid, i.e. the sorption activity of the H-form of the cation exchanger is higher in relation to nicotinic acid molecules. A change in the amount of a crosslinking agent (from 4% to 8% divinylbenzene) in a polystyrene type sulfonic cation exchanger does not significantly affect its sorption activity towards pyridinecarboxylic acids.

Highly efficient dye removal and lysozyme purification using strong and weak cation-exchange nanofiber membranes

Electrospinning technology was applied for the preparation of polyacrylonitrile (PAN) nanofiber membrane in this work. After hot pressing, alkaline hydrolysis and neutralization treatment, a weak acid cation exchange membrane (P-COOH) was prepared. By the covalent coupling reaction between the acidic membrane and aminomethane sulfonic acid (AMSA), a strong acidic nanofiber membrane (P-SO3H) was obtained. The surface morphology, chemical structure, and thermal stability of the prepared ion exchange membranes were analyzed via SEM, FTIR and TGA. Analytical results showed that the membranes were prepared successfully and thermally stable. The ion exchange membrane (IEX) was conducted with the newly designed membrane reactor, and different operating conditions affecting the adsorption efficiency of Toluidine Blue dye (TBO) were investigated by dynamic flow process. The results showed that dynamic binding capacity (DBC) of weak and strong IEX membranes for TBO dye was ~170 mg/g in a dynamic flow process. Simultaneously, the ion exchange membranes were also used for purifying lysozyme from chicken egg white (CEW). Results illustrated that the recovery yield and purification factor of lysozyme were 93.43% and 29.23 times (P-COOH); 90.72% and 36.22 times (P-SO3H), respectively. It was revealed that two type ion exchange membranes were very suitable as an adsorber for use in dye waste treatment and lysozyme purification process. P-SO3H strong ion-exchange membrane was more effective either removal of TBO dye or purification of lysozyme. The ion exchange membranes not only effectively purified lysozyme from CEW solution, but also effectively removed dye from wastewater.