Resin Treatment Research Articles

Bonding treatment of denture resins repaired with VLC

Bonding treatment of denture resins repaired with VLC

Research on Solid-State Linear Transformer Driver Power Source Driving Atmospheric Pressure Plasma Jet Treatment of Epoxy Resin

The Solid-State Linear Transformer Driver (SSLTD) is a nanosecond pulse power source characterized by its fast rise time and adjustable output waveform. It can generate uniform and stable atmospheric plasma jets, which is suitable for material surface modification. In this study, a 15-stage SSLTD was designed and assembled, which can produce a stable nanosecond pulse voltage up to 15 times the amplitude of the charging voltage at high frequencies, with a rise time of approximately 10 ns. This device can be used to generate stable atmospheric pressure Ar plasma jets with an electron density in the range of 1015~1016 cm−3 and gas temperatures close to room temperature. After the modification treatment by the plasma jets, the content of the C=O groups on the surface of the epoxy resin significantly increased in the wavelength range of 1720~1740 cm−1, and its flashover resistance was noticeably enhanced. The optimal comprehensive modification effect was achieved at a charging voltage of 600 V, pulse width of 50 ns, and pulse frequency in the range of 800~1000 Hz.

Novel assessment of molten salt oxidation for cation exchange resin treatment: Effective neutralization of sulfurous gas with Li2CO3-Na2CO3-K2CO3 system

The conventional thermal treatment of cation exchange resin substantially releases sulfurous gases, causing significant equipment corrosion and air pollution. In contrast, the Li2CO3-Na2CO3-K2CO3 as an alkaline molten system effectively neutralizes sulfur gas and mitigates waste gas production inherent in thermal oxidation methods. In the molten salt oxidation process, the volume concentration of SO2 was reduced by 81.7 % compared to that in the traditional thermal oxidation process, and this method reduces the generation of hazardous gases such as CO, CH4, and C2H6. The integration of online gas mass spectrometry and phase stability diagrams for carbonate and sulfur interception products demonstrate excellent thermodynamic stability during the molten salt oxidation (MSO) process. Moreover, a more accurate assessment of the acid gas neutralization capacity of the molten salt system is provided, and the acid gas neutralization capacity of the Li2CO3-Na2CO3-K2CO3 carbonate system can reach 82.58 % at 800 °C. The predominant contributors to acid gas neutralization are Na2CO3 and K2CO3, as evidenced by waste salt composition and ternary phase diagrams. The stable presence of Li2CO3 throughout the MSO process contributes to the lowering of the melting point of the carbonate system to 393 °C.

Impact of surface treatment and addition of CuO NPs of surface roughness of acrylic denture base bonded to soft liner

Background: The import of the rough surface makes the application of several elements to enhance this feature vital for the adhesion of soft liners. Aim: The study's goal was to to ascertain the impact of copper oxide nanoparticles added in two ratios to heated-cured acrylic resin and fiber laser surface treatment on surface roughness. Materials and methods:60 acrylic specimens in the shape of discs were manufactured and divided into three groups: one received no addition; the other two received the addition of 0.3% CuO NPs; and a third group that received the addition of 0.5% CuO NPs. Each group was divided into two categories: those that were laser treatment and those who did not. The surface roughness test was then examined using a roughness tester called a profilometer. Results: The average roughness values were high for the control groups and low for the CuO NPs 0.5% groups. The mean values in the laser-treated groups had greater roughness than the control groups, according to the laser application.Conclusion:. As the fraction of CuO NPs increased, the surface roughness reduced. The laser treatment also reduced surface roughness.

Challenges and Progress in Spent Ion-Exchange Resin Management at NPPs

The management of radioactive spent ion-exchange resins poses significant challenges for NPPs, due to the lack of economically viable and efficient processing technologies. Such a situation necessitates urgent technological solutions. Historically, conventional methods of radioactive waste treatment have struggled to address the unique properties of spent ion-exchange resins, resulting in their gradual accumulation at industrial sites. At present, the accumulation of spent ion-exchange resins at Ukrainian NPPs has reached critical level, so that addressing radioactive waste management within the national nuclear power industry necessitates two distinct strategies: an immediate technological solution to condition and dispose of the accumulated spent ion-exchange resins, and a sophisticated method aimed at eliminating critical accumulation of spent ion-exchange resins in the future. This publication explores the context and the current status of spent ion-exchange resins management at Ukrainian NPPs, highlighting the efforts to develop and implement treatment technologies, both well-known and innovative. Various methods, including geopolymerization, UHF-vitrification, cementation, and decontamination, are assessed and compared for their feasibility and effectiveness. The study emphasizes the need for innovative approaches to yield safer, more stable, and volume-reduced end-products compared to conventional methods. Additionally, the paper discusses ongoing research endeavors and the importance of knowledge dissemination within the scientific community. Despite challenges, there is growing momentum towards finding practical solutions for spent ion-exchange resins treatment, emphasizing the need for continued research and innovation in this critical area of radioactive waste management. By addressing these challenges and advancing technological solutions, Ukraine can mitigate the accumulation of spent ion-exchange resins and enhance radioactive waste management practices in the national nuclear power industry.

Modulation of cream cheese physicochemical and functional properties with ultrafiltration and calcium reduction

The production of cream cheese from ultrafiltered (UF) milk can reduce acid whey generation but the effect of altered protein and calcium concentration on the physicochemical properties of cream cheese is not well understood. In this study, the effect of skim milk concentration by UF (2.5 and 5 fold) was assessed both with and without calcium reduction using 2% (w/v) cation resin treatment. UF concentration increased the concentration of peptides and free amino acids and led to a more heterogeneous and porous microstructure, resulting in a softer, less viscous and less thermally stable cream cheese. Calcium reduction decreased peptide generation, increased the size of corpuscular structures, decreased porosity and increased thermal stability but did not significantly decrease cheese hardness or viscosity. The study illustrates how protein or calcium concentration, can be used to alter functional properties.

Advanced strategies for conversing and fixing sulfur during waste resins oxidation through Ca/Zn oxides enhanced Na2CO3-K2CO3 system

The effective reduction of sulfur pollutant emissions during the treatment of waste resins has always posed a challenge. This study put forward a solution to using the metallic oxide enhanced Na2CO3-K2CO3 system for the treatment of waste resins (CERs). Na2CO3-K2CO3 was used as a medium for heat transfer and desulfurization, while CaO or ZnO functioned as catalysts in the sulfur conversion process. The thermodynamic analysis substantiated the reliability of enhanced sulfur fixation by CaO and ZnO. H2S, SO2 and COS primarily generated during the destruction stage of -SO3H (280–500°C) and residues (∼700°C), which were largely absorbed through a vapor-liquid-solid reaction to generate CaCO3, ZnS and K2SO4. CaO improved the conversion of sulfur to sulfate and effectively mitigated the excessive emissions of CO2. SO2 generated by the oxidation of ZnS at about 800 °C could be further absorbed by molten Na2CO3-K2CO3 to form K2SO4. The proposed method exhibited in-situ desulfurization capability and effectively inhibited the sulfur migration to gaseous products. At 800°C, the sulfur retention rate, the formation rate of SO42- and the oxidation efficiency of CERs reached 91.39 %, 80.61 % and 99.99 %, respectively. The existence of CaO and ZnO facilitated the inorganic transformation of organic sulfur, and the efficient conversion of organic sulfur into inorganic compounds was achieved. This approach provides a new opportunity to improve the treatment efficiency of radioactive solid waste containing organic sulfur.

Study on fretting friction properties based on GCr15 alloy and liquid epoxy resin protective coatings on GCr15 alloy

GCr15 alloy steel is a representative alloy steel of high carbon chromium bearing steel, with good comprehensive performance. However, the fretting wear and fatigue at the interface of the GCr15 friction pair greatly reduce its service life. In this study, the friction pair of GCr15 alloy was prepared by the surface treatment of epoxy resin coating. The tangential fretting wear experiments were conducted on the samples with the point contact mode in an SRV-IV multifunctional tester to investigate the evolution law of coefficient of fretting wear, dissipation energy and damage varying with the normal load and displacement amplitude. The results showed that the coefficients of the friction pairs treated with epoxy resin composite materials are lower than those of GCr15-GCr15 friction pairs under the same normal load and displacement amplitude, and the friction coefficients of both types of friction pairs gradually decreased with the increase of normal load and the decrease of displacement amplitude. At the same time, epoxy resin coating treatment reduced the dissipation energy of fretting wear. From the perspective of damage protection, GCr15-GCr15 exhibits severe scratch damage, micropores, and microcracks after friction experiments, while the epoxy resin coating mainly showed furrow. In addition, the decrease in hardness of polymer composite coating increased the wear rate of the samples to a certain extent.

Investigation of microhardness, surface roughness, and color change of preheated composite resins

Aim: Applying heat is a method currently used to enhance the depth of polymerization in composite resin. This study aimed to evaluate the effects of heat treatment on resin hardness, color change, and surface roughness. Methodology: In this study, 64 samples (8 mm2 × 2 mm2) were produced (3M Filtek Universal, G-aenial A’CHORD, Neo Spectra and Clearfil Majesty ES-2) using a Teflon mold (n = 8). Half of the samples were preheated to 50oC, while the other half were polymerized at room temperature. Initial color measurements were performed using a spectrophotometer, the surface roughness was assessed with a profilometer, and the microhardness was determined using a Vickers microhardness device. Subsequently, all samples were immersed in a coffee solution at 37oC. The color changes were documented by the seventh day. The changes in color, roughness, and hardness of the materials were examined by the thirtieth day. Results: The groups that received heat treatment exhibited higher hardness values. The unheated G-aenial A’CHORD composite resin demonstrated the most significant color change by the end of the thirtieth day, while heated and unheated Clearfil Majesty ES-2 composite samples exhibited the least color change. By the end of the thirtieth day, the surface roughness of all samples increased significantly from the baseline, with the 3M Filtek Universal samples, both heated and unheated, showing the highest surface roughness. Conclusion: According to the results of this study, heat treatment of composite resins before polymerization reduces discoloration and improves hardness. Therefore, it is recommended to heat composite resins before application. How to cite this article: Çekmez MB, Karaoğlanoğlu S, Aybala Oktay E, Aydın N, Ersöz B. Investigation of microhardness, surface roughness, and color change of preheated composite resins. Int Dent Res 2024;14(1):42-49. https://doi.org/10.5577/intdentres.523

Differentiation and quantification of extracellular polymeric substances from microalgae and bacteria in the mixed culture

Extracellular polymeric substances (EPS) play significant roles in the formation, function, and interactions of microalgal-bacteria consortia. Understanding the key roles of EPS depends on reliable extraction and quantification methods, but differentiating of EPS from microalgae versus bacteria is challenging. In this work, cation exchange resin (CER) and thermal treatments were applied for total EPS extraction from microalgal-bacteria mixed culture (MBMC), flow cytometry combined with SYTOX Green staining was applied to evaluate cell disruption during EPS extraction, and auto-fluorescence-based cell sorting (AFCS) was used to separate microalgae and bacteria in the MBMC. Thermal extraction achieved much higher EPS yield than CER, but higher temperature and longer time reduced cell activity and disrupted the cells. The highest EPS yield with minimal loss of cell activity and cell disruption was achieved using thermal extraction at 55℃ for 30 min, and this protocol gave good results for MBMC with different microalgae:bacteria (M:B) mass ratios. AFCS combined with thermal treatment achieved the most-efficient biomass differentiation and low EPS loss (<4.5 %) for the entire range of M:B ratios. EPS concentrations in bacteria were larger than in microalgae: 42.8 ± 0.4 mg COD/g TSS versus 9.19 ± 0.38 mg COD/g TSS. These findings document sensitive and accurate methods to extract and quantify EPS from microalgal-bacteria aggregates.

ZnO enhanced molten Na2CO3-K2CO3 system for simulated waste resins treatment: Efficient conversion and fixation of organic sulfur and iron(III)

The radioactive spent resins from pressurized water nuclear power plant always contain a significant proportion of 55Fe, which invariably leads to the release of radionuclides and acidic gases if not treated promptly. Herein, an efficient ZnO enhanced molten salt oxidation (MSO) method was established for the removal and fixation of organic sulfur and Fe in simulated radioactive resins containing Fe3+ (Fe-CERs). The existence of Fe3+ facilitates the reaction with O2 to form Fe2O3, which contributes to the fracture of organic skeleton. The comparative study was conducted to explore the impact of ZnO on the oxidation behavior of Fe and S at 600–800 °C. The introduction of ZnO caused the continuous formation of ZnS at 600–700 °C, and the conversion of ZnO at 800 °C indirectly promotes the retention rate of S (85.42 %). The potential conversion of Zn0.73Fe0.27S to ZnS may occur within the temperature range of 700 °C to 800 °C. Additionally, the predominant presence of carbon in residues at approximately 700 °C could exert a stimulating effect on the sulfidation process of Fe2O3 and inhibit the formation of SO2. The coexistence of Fe2O3, carbon and ZnO effectively diminishes H2S and SO2 amounts while further enhancing the fixation of S and Fe. The increase generation of K2SO4, FeS and Fe3O4 leads to a high formation rate of SO42- (79.36 %) and a great retention efficiency of Fe (96.23 %) at 800 °C. The proposed novel MSO method holds promising potential for applications in the treatment of organic contaminants.

Substantial decrease of PFAS with anion exchange resin treatment – A clinical cross-over trial

BackgroundPer- and polyfluoroalkyl substances (PFAS) are heat and stain resisting chemicals. They are persistent, bioaccumulating and spread ubiquitously. Many hotspots where humans are exposed to high levels of PFAS have been reported. A few small observational studies in humans suggest that treatment with an Anion Exchange Resin (AER) decreases serum PFAS. This first clinical controlled crossover study aimed to assess whether AER decreases perfluorooctanesulfonic acid (PFOS) in highly exposed adults. MethodsAn open label 1:1 randomized treatment sequence crossover study with allocation to oral AER (cholestyramine 4 g three times daily) or observation for 12 weeks was conducted among citizens from a PFAS hotspot. Main inclusion criteria was serum PFOS > 21 ng/mL. Primary endpoint was change in serum PFOS levels between treatment and observational period. ResultsIn total, 45 participants were included with a mean age of 50 years (SD 13). Serum PFOS baseline median was 191 ng/mL (IQR: 129–229) and decreased with a mean of 115 ng/mL (95 % CI: 89–140) on treatment, and 4.3 ng/mL in observation period corresponding to a decrease of 60 % (95 % CI: 53–67; p < 0.0001). PFHxS, PFOA, PFNA and PFDA decreased during treatment between 15 and 44 %. No serious adverse events were reported. ConclusionsOral treatment with AER significantly lowered serum PFOS concentrations suggesting a possible treatment for enhancing elimination of PFOS in highly exposed adults.

Autophagy machinery plays an essential role in traumatic brain injury-induced apoptosis and its related behavioral abnormalities in mice: focus on Boswellia Sacra gum resin.

Traumatic brain injury (TBI) is described as a structural damage or physiological disturbance of brain function that occurs after trauma and causes disability or death in people of all ages. New treatment targets for TBI are being explored because current medicines are frequently ineffectual and poorly tolerated. There is increasing evidence that following TBI, there are widespread changes in autophagy-related proteins in both experimental and clinical settings. The current study investigated if Boswellia Sacra Gum Resin (BSR) treatment (500mg/kg) could modulate post-TBI neuronal autophagy and protein expression, as well as whether BSR could markedly improve functional recovery in a mouse model of TBI. Taken together our results shows for the first time that BSR limits histological alteration, lipid peroxidation, antioxidant, cytokines release and autophagic flux alteration induced by TBI.

Adsorption properties and kinetics of organic acids in yellow rice wine by weakly basic anionic resins based on membrane separation

Abstract Yellow rice wine (Huangjiu) is a traditional alcoholic beverage in China. This study aimed to find a new method to reduce the acidity of Huangjiu. Three membranes with different molecular weight cut-offs (200, 1000, and 2000 Da) were selected to separate small molecules in Huangjiu, and then the adsorption of four models of weakly basic anion-exchange resins (335, D301, D314, and D354) on the organic acids in the filtered fractions of Huangjiu was investigated. The D354 resin exhibited the highest adsorption rate of 157.74 mg/g and the adsorption of acids was more consistent with the proposed second-order kinetic model. The adsorption capacity of D354 resin decreased with increasing temperature, and the adsorption of D354 resin correlated better with the Freundlich isotherm model. The initial deacidification efficiency of the D354 resin was 91.52% and it decreased by 3.88% after 10 regenerations. After the D354 resin treatment, the total acid content decreased by 56.11%, and the retention rates of amino acids and volatile substances reached 97.96% and 81.93%, respectively. The results showed that D354 resin could be used for the deacidification of Huangjiu. Membrane separation combined with resin adsorption process provides a new method to reduce the acidity of Huangjiu, which helps to maintain the flavor of the deacidified Huangjiu while efficiently reducing the acidity.

Ultrasound-assisted macroporous resin treatment improves the color and functional properties of sunflower meal protein

Sunflower meal protein (SMP) has been considered as a high-quality source of plant protein. However, because the chlorogenic acid (CA) contained in sunflower seed meal was prone to oxidation reactions under traditional alkali extraction conditions, the extracted protein has a dark color and some poor functional properties. To this end, this study used ultrasound-assisted macroporous resin treatment to extract SMP. The improvement effects and potential mechanisms of ultrasonic-assisted macroporous resin treatment with different powers (100, 300, and 500 W) on the color and functional properties of SMP were studied. The results showed that compared with untreated sunflower meal protein (USMP), the lightness value (L*), solubility, emulsification, and gel elasticity were significantly enhanced when treated with 100 W and 300 W ultrasonic-assisted macroporous resin. However, when the ultrasonic power was increased to 500 W, the L* value, solubility, emulsification, and gel elasticity decreased instead, indicating that lower power (100 W and 300 W) ultrasonic-assisted macroporous resin treatment significantly improved the color and functional properties of SMP. Further research found that ultrasound-assisted macroporous resin treatment changed the secondary and tertiary structures of SMP, transformed β-sheet into α-helix and β-turn through rearrangement, and significantly improved surface hydrophobicity. It shows that ultrasonic-assisted macroporous resin treatment expands the SMP structure and exposes hydrophobic groups, thereby improving the color and functional properties of SMP. This study provides a potential strategy for extracting SMP with light color and good functional properties. It also provides a theoretical basis for the wide application of SMP in food processing.

Scientific Analysis and Conservation Treatment of the Ancestral Tablet Excavated from the Site of Gongpyeong, Seoul

Scientific analysis and conservation treatment were conducted on two ancestral tablets excavated in whole form the site of the 15th and 16th districts (B area) in Gongpyeong, Seoul. As a result of scientific analysis, a rectangular empty space was confirmed inside the ancestral tablet that could not be seen with the naked eye. It was a form of manufacturing and combining a main body and a prop composed of the front side and the back side, and the tree species of all the members of the two ancestral tablets were identified as Castanea spp.. It is supposed that the two ancestral tablets excavated from the Gongpyeong site were manufactured in accordance with the standard and shape similar to the contents of “Garye”, which has records on the production of ancestral tablets. The excavated ancestral tablets were immersed to the final 40% using PEG#2000 by applying the PEG immersion method, and dried using a vacuum freeze dryer. After drying, disparate things such as PEG and soil remaining on the surface were removed, and PEG#4000 15% (in ethyl alcohol) was applied to the surface once to the surface to strengthen the surface. A slight crack was observed in a part of a prop of one of the two ancestral tablets, and it was restored using epoxy-based resin, color-matched, and conservation treatment was completed.

Surface topography and spectrophotometric assessment of white spot lesions restored with nano-hydroxyapatite-containing universal adhesive resin: an in-vitro study

BackgroundWhite spot lesion (WSL) is a main shortcoming accompanied by orthodontic treatment. It impairs the esthetic, surface hardness, and surface texture of enamel. So, this study was conducted to analyze the surface characteristics and color change of white spot lesions treated with nano-hydroxyapatite (nHA)-enriched universal adhesive resin.Materials and methodsEighty sound human permanent molars crowns were sectioned into two halves, producing 160 specimens. 16 specimens were left untreated, and 144 specimens were artificially-demineralized to generate WSLs. The specimens were classified according to the treatment approach applied as follows: I; Sound enamel, Group II; artificially-created WSLs, Group III; ICON resin-restored WSLs, Group IV; Universal adhesive resin-restored WSLs, Group V; 0.5 wt% nHA-containing universal adhesive resin-restored WSLs, Group VI; 1 wt% nHA-containing universal adhesive resin- restored WSLs, and Group VII; 3 wt% nHA-containing universal adhesive resin-restored WSLs, Group VIII; 5 wt% nHA-containing universal adhesive resin-restored WSLs, Group IX; 7 wt% nHA-containing universal adhesive resin-restored WSLs, and Group X; 10 wt% nHA-containing universal adhesive resin-restored WSLs. Some surface characteristics and color changes were assessed. Data was collected and analyzed statistically using ANOVA and the Tukey test at p < 0.05.ResultsSurface microhardness of WSLs was significantly improved with all investigated ratios of nHA-containing universal adhesive (p < 0.0001), with the highest mean belonging to 10 wt% nHA-containing universal adhesive resin treated WSLs. All ratios of nHA-containing universal adhesive resin significantly reduced the surface roughness of WSLs (p < 0.0001). The investigated ratios of 1, 3, 5, 7, and 10 wt% nHA-containing universal adhesive resin treatment approach could mask the WSLs significantly (p < 0.0001).ConclusionsNano-hydroxyapatite-containing universal adhesive is a promising contemporary approach for the management of WSLs, coupled both the remineralizing concept and the minimally invasive resin infiltration.

Enhanced ethanol production using hydrophobic resin detoxified Pine forest litter hydrolysate and integrated fermentation process development supplementing molasses.

Globally escalating ethanol demand necessitates the use of hybrid technologies integrating first- and second-generation biofuel feedstocks for achieving the futuristic targets of gasoline replacement with bioethanol. In present study, an optimized two-step sequential pre-treatment (first dilute alkali, then dilute acid) of Pine forest litter (PFL) was developed. Furthermore, the saccharification of pre-treated PFL was optimized through Response Surface Methodology using Box-Behnken Design, wherein 0.558g/g of reducing sugar was released under the optimized conditions (12.5% w/v of biomass loading, 10 FPU/g of PFL enzyme loading, 0.15% v/v Tween-80 and 48h incubation time). Moreover, during hydrolysate fermentation using Saccharomyces cerevisiae NCIM 3288 strain, 22.51 ± 1.02g/L ethanol was produced. Remarkably, hydrophobic resin (XAD-4) treatment of PFL hydrolysate, significantly removed inhibitors (Furfural, 5-hydroxymethylfurfural and phenolics) and increased ethanol production to 27.38 ± 1.18g/L. Furthermore, during fermentation of molasses supplemented PFL hydrolysate (total initial sugar: 100 ± 3.27g/L), a maximum of 46.02 ± 2.08g/L ethanol was produced with 0.482g/g yield and 1.92g/l/h productivity. These findings indicated that the integration of molasses to lignocellulosic hydrolysate, would be a promising hybrid technology for industrial ethanol production within existing bio-refinery infrastructure.

SAT007 Excess Bile Acids Can Compensate To Promote Regeneration In Constitutive Androstane Receptor Knockout Mice

Abstract Disclosure: W. Zhou: None. U.V. Chembazhi: None. J. Huang: None. S. Bangru: None. A.E. Dean: None. A. Kalsotra: None. D.A. Rudnick: None. S. Anakk: None. The liver plays a key role for the metabolism of nutrients and xenobiotics. Nuclear receptor constitutive androstane receptor (CAR) regulates the transcription of detoxification and proliferation genes. The liver can also regenerate, which can be tested using a model of 2/3rd partial hepatectomy (PHx). We investigated the role for CAR during liver regeneration by mining publicly available single-cell RNA seq data after PHx. Car and its target expression was enriched in hypermetabolic hepatocytes, which was unexpected since based on previous studies we anticipated a proliferative role for CAR. We also examined liver weight, hepatocyte proliferation, and levels of bile acid (BAs) and liver enzymes in Car knockout (CarKO) and wild-type (WT) mice after PHx, and found them comparable between the two genotypes. Intriguingly, we noted a dramatic BA overload and concomitant changes in the expression of genes responsible for BA synthesis and detoxification in CarKO mice after PHx. This led us to speculate if the BA excess observed in CarKO mice after PHx promoted regeneration. When this excess BAs was reduced with a resin treatment in CarKO mice, we found deficits in proliferation and Yes-associated protein signaling demonstrating that elevated BAs act as mitogens to counteract the regenerative defects in CarKO livers. Presentation: Saturday, June 17, 2023

A low-cost and sustainable solution for nitrate removal from secondary effluent: Macroporous ion exchange resin treatment

Macroporous ion exchange resin has excellent selectivity to nitrogen (N), phosphorus (P) and partially soluble refractory organic compounds contained in the secondary effluent of wastewater treatment plants (WWTP). In this study, macroporous ion exchange resins were chosen as an alternative to single biochemical nitrogen removal processes. Various conditions were examined to optimize adsorption performance, and the adsorption mechanism was explored through isotherm fitting, thermodynamic parameter calculation, and kinetic analysis. The experiment demonstrated that the resin exhibited strong selectivity for nitrate (NO3−) and achieved an equilibrium adsorption amount of 9.8924 mg/g and an equilibrium adsorption time of 60 min at 25 °C. The resin denitrification pilot plant demonstrated stable operation for two months and achieved COD<20 mg/L, TN < 1.5 mg/L, and NH4+-N<0.5 mg/L. The removal rates of COD, TP, NH4+-N, NO3−-N, and TN were 41.65%, 42.96%, 55.37%, 91.8%, and 90.81%, respectively. After the resin was regenerated, the removal rates of NO3−-N, TN and the regeneration recovery rate were above 90%. Through cost analysis, the treatment cost of the pilot plant is only 0.104 $/m3. This study presents a practical, low-cost, and efficient treatment method for the deep treatment of secondary effluent from WWTP in practical engineering, providing new ideas and theoretical guidance.