Regeneration Of Resin Research Articles

Cyclic Removal and Destruction of Per- and Polyfluoroalkyl Substances from Water Using Ion Exchange, Resin Regeneration, and UV/Sulfite Reduction

Ion exchange (IX) can effectively remove per- and poly-fluoroalkyl substances (PFAS) from drinking water sources at ng/L to µg/L levels. However, adsorbed PFAS on spent resins should be further destructed for detoxification. Traditional resin incineration or landfilling may cause secondary pollution to the surrounding environment and cannot achieve resin reuse. This study explored three variations of a PFAS treatment train, aiming to completely defluorinate PFAS with different chain lengths and functional groups at environmentally relevant levels (ng/L) and to reuse the resins and solvents. The optimized treatment train includes IX, resin regeneration with 5wt% NaCl and 60% v/v methanol, distillation of waste regenerant, and advanced reduction by hydrated electrons (eaq−) generated during the ultraviolet/sulfite (UV/sulfite) treatment of still bottoms. Such a treatment train achieved nearly 100% PFAS removal from surface water and groundwater using either PFAS-specific or generic resins, and almost 100% defluorination of PFAS except a few short-chain fluorinated sulfonates and ethers. Regenerated resins had comparable PFAS removal to the pristine resins over three cycles. The generic resins (e.g., Dupont AmberLite™ IRA910) are easier to regenerate and thus are recommended for the treatment train over PFAS-selective resins (e.g., Purofine® PFA694E). Direct heterogenous defluorination on resins loaded with perfluorooctane sulfonate (PFOS) was ineffective, potentially due to the consumption of UV light/eaq− by the resins and insufficient contact between the UV light/eaq− with PFOS on the resin surface. Distillation of the waste regenerant successfully concentrated PFAS in the still bottoms, reduced the waste volume, and removed excess methanol, all essential for effective UV/sulfite treatment. Meanwhile, the produced condensate with high methanol contents and low PFAS levels can be reused for the next regeneration cycle. Findings from this study provide a timely and sustainable solution to the stringent and evolving regulations on PFAS and the resultant production of PFAS-laden resins as hazardous wastes.

Tactfully introducing amphoteric group into electroactive membrane motivates highly efficient H2O splitting for reversible removal and recovery of nickel(II)

Membrane-based electro-deposition (MED) is an original process promising for reversible removal and recovery of toxic heavy metal ions from wastewater. The removal efficiency of heavy metal ions, however, was limited by the poor membrane surface H2O splitting in the conventional ion exchange membrane (IEM). Inspired by the amphoteric interface-triggered ion exchange resin regeneration phenomenon in electro-deionization, herein we subtly introduced the amphoteric group into IEM as a proof of concept to solve the above bottleneck. By virtue of the “electronic porter” role of the amphoteric -3OS-R-N(CH3)3+, the electron extraction from adsorbed H2O could be accelerated, extending the H2O splitting from the conventional membrane surface to the bulk membrane interior. Such an H2O splitting extension favorably produced an intensified and well-modeled OH- production region at the anodic side of IEM, enhancing the Ni2+ basic deposition accordingly. This special characteristic allowed our MED to realize a super-eminent metal ion removal rate (10.5 mol·h−1·m−2) along with an ultra-low specific energy consumption (0.1 kWh·mol−1) for Ni2+ removal, which considerably surpassed those of state-of-the-art heavy metal ion removal processes reported yet. Further, the deposited Ni2+ could be in situ recovered in conjunction with the facile polarity reversal method. The amphoteric electroactive membrane with high H2O splitting activity is expected to pave the path to engineering MED for efficient heavy metal ion removal and recovery.

A Facile Strategy for Freeze-Drying Preparation of Silica Aerogel from Sodium Silicate

Silica aerogels have attracted widespread attention for their distinct nanoporous networks, composed of interconnected silica nanoparticles and high-volume nanosized pores. Nonetheless, producing silica aerogels with low costs and simple processes still remains a considerable challenge. Herein, the mesoporous silica aerogels were prepared from inorganic silicon source through the freeze-drying. Using sodium silicate as the silica precursor, the gel was formed by the ion exchange and sol-gel in sequence. The regeneration of the weak acidic ion exchange resin produced the sodium acetate solution, which can be potentially used as carbon source for sewage treatment. To eliminate the collapse of microstructure of the silica hydrogel during freeze-drying, the tert-butanol aqueous solution was used as the freeze-drying medium. Particularly, the direct mixing of tert-butanol and silica sol to generate wet gel avoids prolonged and material-consuming solvent replacement. The pore structure of mesoporous silica aerogel can be adjusted by changing the concentration of tert-butanol solution. The 18 wt% tert-butanol solution results in the most favorable mesoporous structure of silica aerogel, owing to the eutectic behavior within the gel, which was verified by differential scanning calorimetry (DSC) analysis, and also due to the superior and uniform mesoporous structure of wet gel, which was validated by the cryogenic scanning electron microscopy (cryo-SEM) observation. Under optimal process conditions, the obtained silica aerogel exhibited a high porosity (97.74%) and typical mesoporous structure with the large pore volume (4.84 cm3·g-1) and an average pore diameter of 24.40 nm. The proposed cost-effective preparation strategy could elevate the potentials for large scale applications of silica aerogels in the fields of thermal insulation for building, industrial catalysis and adsorption, etc.

Evaluation of a triethylenetetramine-chitosan derivative for the removal of palladium ion from an intricate adsorbate system

Palladium (Pd), a well-known noble metal for its exceptional physical and chemical properties, finds widespread applications in sectors including automotive, hydrogen purification, dentistry, coinage, and jewelry. The growing demand for Pd has led to resource scarcity. This feature necessitated upon the economically and environmentally viable means for the reclamation of the precious metal ions from secondary sources. This article delves into the Pd adsorptive-desorption trends associated with the triethylenetetramine cross-linked chitosan (CH-TETA) derivative in moderately complex solutions. The effect of moderate solution chemistry complexity, incorporating ammonium hydroxide (NH4OH) and ethylenediaminetetraacetic acid (EDTA), within the synthetic electroless plating (ELP) solutions was investigated. Batch adsorption experiments were conducted through a variation of process parameters namely solution pH, CH-TETA dosage, adsorption duration, initial Pd concentration, and temperature. CH-TETA demonstrates an impressive Pd adsorption capacity ranging from 43.53 to 117.08 mg g⁻¹ and is correspondingly accompanied by the metal removal efficiency range of 87.05 % to 39.03 %. Such promising performance has been ascertained for an initial Pd constitution of 50 to 300 mg L⁻¹. Despite constituting other additives in the adsorbate system, utilizing simple acidic and basic eluents, the CH-TETA derivative exhibited a reasonable recovery efficacy of 39.68 %. Thereafter, recovery of Pd can be further enhanced into two approaches. In these, the first refers to the utilization of various other methods such as thermal, electrochemical, ultrasound, and microwave-assisted regeneration from spent adsorbents. Secondly, a pre-treatment method can be adopted to remove the additives prior to the adsorption process. In summary, the recovery of precious metal ions from the spent adsorbents has been a challenging task. Based on the discussion, further improvements based on the findings of this article are possible by targeting relevant research methodologies in resin chemistry and regeneration methods.

Ultrasonication-enhanced regeneration of resin for adsorbing uranium from leach solutions generated via in-situ leaching

Ultrasonication-enhanced regeneration of resin for adsorbing uranium from leach solutions generated via in-situ leaching

Fluoropolymer sorbent for efficient and selective capturing of per- and polyfluorinated compounds

Per- and poly-fluoroalkyl substances (PFAS) have gained widespread attention due to their adverse effects on health and environment. Developing efficient technology to capture PFAS from contaminated sources remains a great challenge. In this study, we introduce a type of reusable polymeric sorbent (PFPE-IEX + ) for rapid, efficient, and selective removal of multiple PFAS impurities from various contaminated water sources. The resin achieves >98% removal efficiency ([PFPE-IEX + ] = 0.5–5 mg mL−1, [PFAS]0 = 1–10 ppb in potable water and landfill leachate) and >500 mg g−1 sorption capacity for the 11 types of examined PFAS. We achieve efficient PFAS removal without breakthrough and subsequent resin regeneration and demonstrate good PFAS recovery in a proof-of-concept cartridge setup. The outcomes of this study offer valuable guidance to the design of platforms for efficient and selective PFAS capture from contaminated water, such as drinking water and landfill leachate.

Regeneration of conventional and emerging PFAS-selective anion exchange resins used to treat PFAS-contaminated waters

Anion exchange resins (AERs) have emerged as a promising separation technology to remediate PFAS-contaminated waters due to their improved selectivities and capacities in comparison to legacy activated carbon adsorbents. Presently, site managers choose between AER systems employing resins defined as being ‘regenerable’ with relatively low PFAS selectivity, and PFAS-selective resins that are marketed as ‘single-use’ media intended for disposal upon PFAS breakthrough. However, the potential for these highly-selective adsorbents to be regenerated and/or reused remains poorly characterized. This study presents a comprehensive evaluation of the efficacy of various regenerant solution constituents, mixtures, and operational considerations on the regenerability of both ‘regenerable’ and ‘PFAS-selective’ AERs that were loaded during a pilot treatment study of PFAS-contaminated groundwater. Batch screening of regenerant solution constituents found that both classes of resins may be effectively regenerated using combinations of salt brine and organic cosolvent, with high cosolvent fractions being necessary for PFAS-selective AERs. While neither brine-only nor solvent-only regenerant solutions led to effective PFAS desorption, the efficacy of regeneration with brine/cosolvent mixtures varied with salt type and cosolvent composition. Chloride salts outperformed sulfate and bicarbonate salts, cosolvent efficacy depended on the volume fraction and type used, and highly non-polar solutions led to optimal PFAS desorption. Continuous-flow regeneration experiments showed near-complete PFAS desorption from regenerable AERs using 10 bed volumes (BVs) of 70 % methanolic brine solutions, whereas PFAS-selective resins required more bed volumes (30) of brines with higher methanol content (90 %) or a more hydrophobic cosolvent (n-propanol); increasing regenerant empty-bed contact time had minimal effect on PFAS desorption. > 90 % methanol recovery from the resulting waste regenerant mixtures was accomplished with negligible PFAS contamination using distillation, leaving a minimal volume of a PFAS-concentrated still bottoms waste that may be further treated for PFAS destruction. Life cycle analyses revealed that groundwater treatment using PFAS-selective AERs operated in a regenerable mode have lower environmental impacts and costs than systems using conventional regenerable AERs, and lower treatment costs than systems operated using PFAS-selective resins in a single-use mode. Although counterintuitive, these findings stem from the fact that higher cosolvent requirements for regeneration of PFAS-selective resins lead to greater internal recycling of regenerant solutions and much lower volumes of residual waste still bottoms that require off-site incineration or disposal.

Enhancing Resource Recovery through Electro-Assisted Regeneration of an Ammonia-Selective Cation Exchange Resin

Enhancing Resource Recovery through Electro-Assisted Regeneration of an Ammonia-Selective Cation Exchange Resin

Gold recovery from chloride leach solution of TCCA using D301 anion exchange resin and elution with thiourea

Trichloroisocyanuric acid (TCCA), which is used for gold leaching, is an alternative to cyanidation due to its lower toxicity and higher efficiency. This study investigated the gold recovery procedures from highly effective chloride leaching solution using the D301 resin. This approach prevented the inhibition of gold adsorption when using activated carbon. Herein, the optimal conditions for gold adsorption were discussed, including establishing adsorption kinetics and isotherms, and calculating adsorption activation energy. Additionally, SEM (Scanning Electron Microscope), FTIR (Fourier Transform Infrared Spectroscopy), and XPS (X-ray Photoelectron Spectroscopy) techniques were used to reveal the mechanism of gold adsorption using D301 resin. Under optimal conditions (pH 4.0, temperature 25 °C, time 120 min), an average adsorption percentage of 99.2% was achieved. Analysis of the adsorption data confirmed that gold adsorption followed the pseudo-second-order kinetic model and Freundlich adsorption isotherm. The calculated activation energy was 9.69 kJ mol−1, indicating a predominance of physical adsorption involving ion exchange reactions with protonated tertiary amine groups in the D301 resin beads. Furthermore, among various eluents tested in desorption experiments, a solution containing a mixture of thiourea and hydrochloric acid with 0.4 mol L−1 and 0.8 mol L−1, respectively, demonstrated superior efficiency, achieving a successful desorption percentage reaching 95.7 ± 0.3% within 80 min. After three cycles of resin regeneration, the regeneration efficiency reached 91.2% while maintaining an average adsorption percentage of 95.3%.

Alcohol regeneration of anion exchange resin loaded with per‐ and polyfluoroalkyl substances and organic contaminants

Alcohol regeneration of anion exchange resin loaded with per‐ and polyfluoroalkyl substances and organic contaminants

Investigation of water and carbon footprint reductions employing best available techniques in the textile sector

This study includes a new approach in terms of connecting best available technique (BAT) selection/decision to water and carbon footprint evaluations in addition to economical and environmental performance criteria. This new approach was applied to an integrated textile facility mainly employing cotton fabric finishing and printing-dyeing. After potential implementation of selected 12 BATs, the reduction potentials in the existing water/carbon footprints were calculated. The blue water, grey water and total water footprint values of the facility were found to be 126, 837 and 963 L/kg product, respectively. The total carbon footprint value of the facility was found to be 7.011 kg CO2eq/kg product, and most of this comes from steam use. The optimization of resin regeneration frequency/duration and washing-rinsing steps in the water softening system via online hardness sensors provides 20–30% reductions in blue water footprint values. It was calculated that when BATs from 1 to 7 together are implemented in the facility, an average of 68.5% reduction in the total water footprint could be achieved. Alternatively, when BATs 1–5 and 8 are implemented, such reduction is 45.6%, highlighting the effectiveness of the selected BATs. BAT 9 exhibited the highest reduction in total carbon footprints due to the fact that it is related to minimization of energy losses. If all selected BATs are to be implemented in the facility, a reduction of 1.179 kg CO2eq/kg product could be achieved in the total carbon footprint, corresponding to 16.8% reduction. Significant reductions in energy consumption could be achieved through techniques/applications such as isolation of hot surfaces, reducing reprocesses by improving dyehouse-laboratory coordination, optimizing recipes and applying correct dyeing techniques at once, making lighting systems efficient, process modifications/optimizations in pre-treatment and final finishing processes, and reducing water consumption in processes requiring hot water. This study indicated that selection and application of BATs in industries should be coupled with water/carbon footprint evaluations.

Towards a zero liquid discharge process from brine treatment: Water recovery, nitrate electrochemical elimination and potential valorization of hydrogen and salts

This research addresses the issues related with treatment and valorization of brines and nitrate decontamination of surface and ground waters. The objective was to approximate to zero liquid discharge (ZLD) minimizing the environmental impact of brines of an electrodialysis reversal water treatment plant (EDRWTP) as an example. The innovative in flow process was developed from lab to pre-industrial scale and joined several main concepts: ion-exchange equilibrium for softening or demineralization of brines; reversed osmosis to recover suitable water and to enrich the waste in nitrate for efficient electrochemical reduction of NO3− to N2; valorization of subproducts by direct use or by precipitation; and assessment of the whole process by measuring in-line several parameters. The achieved softening was around 98 % and the recovered water from this current by reversed osmosis was 75 %. The brine of this step (25 %) contained around 1500 mg/L of nitrate and it was treated by electrochemical reduction with a Bi/Sn cathode providing a gas current of 60 % of initial nitrate reduced to N2, O2, H2O, NH3 and at least 97 % of H2. The aqueous current contained around 40 % of initial nitrate as ammonium and nitrite lower than 50 and 5 mg/L, respectively. Hypochlorite was added to this last current for oxidizing ammonium and nitrite to N2 and nitrate, respectively, being nitrate and ammonium lower than 50 and 5 mg/L, respectively. After the obtained water was demineralized and conducted to the EDRWTP inlet. The recovery of insoluble salts as calcium carbonate, reuse of saline solutions for the regeneration of process resins and the potential use of hydrogen generated as a by-product during the electrochemical reduction are other possible utilities.

Industrial-scale highly efficient nickel recovery from electroplating wastewater using resin adsorption followed by aeration mixing acid regeneration

Cation-exchange resins have been used to recover nickel from electroplating wastewater, but resin regeneration often consumes a large amount of acid and alkali, resulting in low Ni(II) concentrations in regenerating solution. In this study, the industrial-scale Ni(II) recovery from electroplating wastewater using resin adsorption and regeneration was investigated. Two cation-exchange resin tanks and one chelated resin tank in series effectively reduced the nickel concentrations to below 0.1 mg/L. The spent resin could be efficiently regenerated by a novel aeration mixing method, greatly reducing acid and alkali consumption in comparison with the traditional downstream regeneration method. The spent resin was successfully regenerated by 2 bed volume (BV) of 6 % HCl, and the acid utilization ratio was above 99 %. More than 60 g/L of Ni(II) ions in regenerating solution was stably obtained, which benefited the subsequent nickel recovery by electrodeposition. Similarly, H2SO4 was also effective for Ni(II) desorption from the spent resins. The adsorption and regeneration cost was calculated to be ¥ 5.5–9.5/m3 for the electroplating wastewater containing 200–800 mg/L Ni(II) ions, much lower than that by chemical precipitation. This study provided an effective resin regeneration method to consume less regenerants and obtain higher Ni(II) concentrations, making the Ni(II) recovery cost-effective.

Guide for application of macroporous adsorption resins in polysaccharides purification

AbstractAs a highly selective, recoverable, and low‐cost process, macroporous resins (MPRs) are of interest for the purification of bioactive components from natural products. This guide takes super‐crosslinked MPR as an example, and focuses on application of macroporous adsorption resin in polysaccharide purification, including pretreatment and regeneration of macroporous adsorption resin, various factors affecting the adsorption effect of macroporous adsorption resin, and adsorption mechanism of resin.

Recovery of ammonium from stormwater by ion exchange: Purifying seepage water in laboratory and pilot scales

Ammonium removal from seepage water (representative stormwater) by ion exchange was investigated experimentally on laboratory and pilot scales. The results present the removal of ammonium from the worst-case scenario of stormwater, which is seepage water. Ammonium removal was efficiently accomplished with commercial resin CS16GC in proton and sodium forms. With the resin in H+ form, simultaneous removal of Na+, K+, Ca2+, and Mg2+ was achieved, whereas with the resin in Na+ form, other metals except Na+ were removed. Resin regeneration could be done efficiently with 2 mol/L HCl and 2 mol/L NaCl. Cyclic (7 cycles) ammonium removal runs were conducted with the CS16GC resin in Na+ form on both laboratory and pilot scale. Qualitatively, the results obtained from the cyclic runs done on laboratory and pilot scales were similar; however, some differences were observed because of slightly different feed compositions. In the pilot-scale run, 95–100% ammonium removal was obtained. The performance of the commercial resin was efficient compared with novel materials reported in the literature in an analysis method proposed by the authors. Ion exchange–based ammonium removal was shown to be an efficient method, and further investigation on the long-term stability of the process is warranted.

A strategy for deep removal of Cu from Ni anolyte based on the ion-exchange method

The sulfide precipitation method has been one of the major strategies used for the removal of Cu from the Ni anolyte. However, the high cost and short shelf-life of the Cu removal agents have consistently posed problems in the practical industrial use of the Ni anolyte purification process. In the present study, a new method for removing Cu from Ni anolyte based on ion exchange is proposed to address the drawbacks of the current sulfide precipitation method. Through isothermal adsorption curve analysis, thermodynamic studies, kinetic studies and cross-sectional SEM-EDS analyses, it was found that the selectivity difference of D850 resin to Cu2+ and Ni2+ is dependent on iminodiacetic acid forming a triple bond with Cu2+ while forming a double bond with Ni2+ in the removal of Cu from a Ni anolyte. The resin dynamic adsorption experiments showed that the fixed-bed ion exchange process is quite similar to the cascade solvent extraction process. The investigations into resin regeneration found that the desorption of Cu2+ and Ni2+ was adequately completed for static desorption when the desorbent concentration was than more 1 mol/L for 60 min. The experiments on D850 resin desorption showed that the desorption equilibrium time, desorbent concentration, and desorption temperature were key factors affecting the desorption of Cu2+ and Ni2+. The dynamic desorption process revealed that a high concentration of hydrochloric acid and a high flow rate could accelerate the desorption process, concentrating the outflow peak and facilitating the collection of Cu2+ and Ni2+. This Cu removal method based on resin ion exchange utilizes the different characteristics of iminodiacetic acid adsorbing Cu and Ni to achieve efficient Cu removal from the Ni anolyte and its recycling. This method is superior to the current method due to its high selectivity, fast adsorption, high desorption rate, and high Cu–Ni ratio of the desorption solution.

ANALYSIS OF EXISTING METHODS FOR IMPROVING THE PHYSICAL AND CHEMICAL CONDITIONS OF THE ION EXCHANGE PROCESS IN WATER TREATMENT

The article deals with the issues of existing processes for improving the physical and chemical conditions of the ion exchange process in water treatment. Patents and publications on the use of the ion exchange method in water treatment have been analysed. The expediency and scientific significance are determined by the possibility of further improving the efficiency of the ion exchange process in water treatment on the basis of the obtained results. Existing methods, such as thermal and cryogenic treatment, membrane plants, distillation and reverse osmosis, have a number of disadvantages, such as high energy consumption of the process and the inability to be used on an industrial scale. A promising method to improve the efficiency of modified ion exchange resins is to use the effect of a magnetic field on the feed water with constant stirring. The article analyses ion exchange resins and their problems, existing research aimed at modernising the ion exchange process, considers ways to optimise the selectivity of ion exchange resins, their modification with dendritic aggregates, and the use of mixed cationic and anionic ion exchange resins. Regeneration of ion-exchange resins using ammonium bicarbonate technology, reagent-free regeneration methods, such as electrodialysis, electrodionization systems, in order to reduce process waste, possible schemes of using ion-exchange plants in combination with other methods of water treatment. The analysis shows the relevance of using the ion exchange process in water treatment and the prospect of further research on ways to intensify the process to reduce energy and economic resources. The obtained results demonstrate the most advanced ways to improve the method of ion exchange for water treatment, such as reagentless regeneration of ionites using electrodialysis, modification of resins by introducing the necessary functional groups.

Enhanced coagulation coupled with cyclic IX adsorption-ARP regeneration for removal of PFOA in drinking water treatment.

Laboratory investigations were conducted to demonstrate a potentially transformative, cost-efficient per- and polyfluoroalkyl substances (PFAS) treatment approach, consisting of enhanced coagulation and repeated ion exchange (IX)-advanced reduction process (ARP) for concurrent PFAS removal and IX resin regeneration. Enhanced alum coagulation at the optimal conditions (pH6.0, 60 mg/L alum) could preferentially remove high molecular-weight, hydrophobic natural organic matter (NOM) from 5.0- to ~1.2-mg/L DOC in simulated natural water. This facilitated subsequent IX adsorption of perfluorooctanoic acid (PFOA, a model PFAS in this study) (20 μg/L) using IRA67 resin by minimizing the competition of NOM for functional sites on the resin. The PFOA/NOM-laden resin was then treated by ARP, generating hydrated electrons (eaq - ) that effectively degraded PFOA. The combined IX-ARP regeneration process was applied over six cycles to treat PFOA in pre-coagulated simulated natural water, nearly doubling the PFOA removal compared with the control group without ARP regeneration. This study underscores the potential of enhanced coagulation coupled with cyclic IX-ARP regeneration as a promising, cost-effective solution for addressing PFOA pollution in water. PRACTITIONER POINTS: Enhanced alum coagulation can substantially mitigate NOM to favor the following IX removal of PFOA in water. Cyclic IX adsorption-ARP regeneration offers an effective, potentially economical solution to the PFOA pollution in water. ARP can effectively degrade PFOA during the ARP regeneration of PFOA/NOM-laden resin.

Use of Nanofiltration and Demineralization of Industrial Effluents : Evaluation of the Feasibility of Reuse for Irrigation of Green Spaces

Assessment of the applicability of neutralization station wastewater in combination with nanofiltration for watering green spaces. To achieve this objective, various analyses were carried out, including pH, conductivity, suspended solids, chlorides, nitrates, sulfates, bicarbonates, silica, total nitrogen, BOD5, COD and heavy metals. The results of our analyses showed that most of the parameters analyzed complied with the standards in force for water intended for the irrigation of green spaces. A few values slightly outside the recommended ranges were observed, mainly due to the cationic resin regeneration process. With regard to heavy metals, the levels found were all below the regulatory threshold values, indicating a low risk of contamination by these elements. On the basis of these results, a number of recommendations were made to demonstrate the feasibility of using discharges from the neutralization pit for watering green spaces, subject to the implementation of appropriate treatment and monitoring measures.

TITANOMAGNETITE CONCENTRATE PROCESSING BY SORPTION CONVERSION

A hydrometallurgical technology for processing titanomagnetite concentrate has been proposed and justified. It includes the decomposition of the concentrate in low-concentration sulfur-acidic solution in the presence of sulfonic cation exchanger in H+ form with the transfer of the main part of the metals of the titanomagnetite concentrate into the sorbent and obtaining a residue enriched with ilmenite, desorption of metals from the saturated sulfonic cation exchanger with a 5 M sodium chloride solution, fractional hydrolytic precipitation and separation of titanium hydroxide, vanadium-enriched iron hydroxide, pure hydroxide iron and mixtures of iron and manganese hydroxides, regeneration of sulfonic cation exchange resin. The optimal parameters for carrying out individual processes have been determined. The technology practically does not consume sulfuric acid and does not generate liquid waste.