Journal of Polymers and the Environment最新文献

{"title":"Recycle of Flexible Polyurethane Foam by Acidolysis and Reuse of Recovered Polyol","authors":"Y. Aksu,&nbsp;H. Haykiri-Acma,&nbsp;S. Yaman","doi":"10.1007/s10924-024-03467-3","DOIUrl":"10.1007/s10924-024-03467-3","url":null,"abstract":"<div><p>Polyurethane foam (PUF) is one of the most widely used polymers and accordingly large quantities of waste materials reveal globally. In this study, chemical recycling method based on acidolysis by dicarboxylic acids using a mixture of unsaturated maleic acid and saturated phthalic acid was used to cleave urethane bonds and produce recycled polyol (repolyol). Effects of the reaction temperature (190 °C, 220 °C), stirring speed (400 rpm, 500 rpm), and reaction time (6 h, 12 h) on the hydroxyl number, water content, viscosity, and acid number of the repolyols were tested. FTIR (Fourier Transform Infrared) and TGA (Thermogravimetric Analysis) techniques were employed to compare the properties of the obtained repolyols with reference polyol. The repolyols were then used at 10–50 wt% as substitute of reference polyol to produce flexible polyurethane foam (FPUF). The produced foams were analyzed by optical microscopy and TGA techniques, and the density, hardness, air permeability, compression set, resilience, and tensile strength characteristics were tested. The analysis results of the FPUFs containing repolyols were compared with those of the reference foam. It was concluded that the obtained polyol can be safely used up to 20 wt% to produce FPUFs. However, further increase in repolyol ratio led to reduction in air permeability, compression set, and resilience performance of the produced FPUFs.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1147 - 1158"},"PeriodicalIF":4.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Characterization of Chitosan-Based Hydrogels Grafted Polyimidazolium as Nitrate Ion Adsorbent from Water and Investigating Biological Properties","authors":"S. Mojtaba Amininasab,&nbsp;Sara Adim,&nbsp;Sara Abdolmaleki,&nbsp;Bita Soleimani,&nbsp;Marjan Hassanzadeh","doi":"10.1007/s10924-024-03465-5","DOIUrl":"10.1007/s10924-024-03465-5","url":null,"abstract":"<div><p>In this study, a chitosan-based polymer composite hydrogel grafted with polyimidazolium was synthesized and evaluated as an adsorbent for nitrate removal from water. The synthesis began with the preparation of a dinitro compound, followed by the synthesis of a diamine monomer, which was then conjugated with chitosan in the presence of glyoxal and formaldehyde to form the final composite. The chemical structure of the synthetic monomers and the composite was characterized using FT-IR, ¹H-NMR, FE-SEM, EDX, and TGA analyses. The concentration of nitrate ions in aqueous solutions was quantified using a spectrophotometer at wavelengths of 220 nm and 275 nm. Various operational parameters, including pH, contact time, initial nitrate ion concentration, and adsorbent dosage, were optimized to maximize nitrate removal efficiency. At an initial nitrate concentration of 70 mg/L, a pH of 7, an adsorbent dosage of 40 mg, and a contact time of 40 min, the synthesized composite exhibited a maximum removal efficiency of 97.75% and an adsorption capacity of 85.53 mg/g. The selectivity of the composite for nitrate ions in the presence of competing ions such as sulfate, bicarbonate, chloride, and phosphate was also evaluated. The presence of competing ions reduced nitrate removal, with bicarbonate having the most significant inhibitory effect and phosphate the least. The adsorption kinetics was best described by a Pseudo-second-order model, while the equilibrium data conformed to the Langmuir isotherm model. The PCH reusability was checked by an adsorption/desorption experiment, and the results showed acceptable constant loading efficiency after five reuse cycles. In addition to the adsorption studies, the composite’s anti-cancer properties were assessed. Cytotoxicity tests were conducted in vitro against three cancer cell lines: A431 (skin carcinoma), HT29 (colorectal cancer), and MCF7 (breast cancer), using cisplatin as a reference standard. The results demonstrated a potent anti-cancer effect against the MCF7 cell line, with an IC50 value of 4.80 µM. Furthermore, the composite included a collapse in the mitochondrial membrane potential (MMP) in MCF7 cells, highlighting its potential as a therapeutic agent.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1131 - 1146"},"PeriodicalIF":4.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Free Radical Scavenging Polylactic Acid Fibers: A Study of Melt Spinning Preparation, Characterization, and Properties","authors":"Chenghui Zheng,&nbsp;Huanling Wu,&nbsp;Qingqing Zhou,&nbsp;Lingfang Wang,&nbsp;Jingchun Lv,&nbsp;Haiyan Mao","doi":"10.1007/s10924-024-03472-6","DOIUrl":"10.1007/s10924-024-03472-6","url":null,"abstract":"<div><p>Polylactic acid (PLA) fibers have great potentials in textile fields with eco-friendship and low carbon emission. However, the poor ductility, inferior free radical scavenging effect, and moderate biodegradability make them challenging in qualified fibers. In this context, a series of PLA fibers with excellent free radical scavenging effect were prepared by melt spinning with PLA /poly (ethylene oxide) (PEO) /curcumin (CUR). The tenacity and free radical scavenging effect of the fiber with 12.0 <i>wt</i>% PEO and 1.0 <i>wt.</i> % CUR were 3.14 CN dtex^-1, 96.2% respectively, compared with 2.24 CN dtex^-1, 2.9% for pure PLA fibers, respectively. X-ray diffraction analysis showed that CUR behaved as nucleating agents and accelerated the crystallization with elevated crystallinity. The synergistic action of PEO and CUR was found to have significant effects on the mechanical, thermal, crystalline, and free radical scavenging properties for the composite fibers. X-photoelectron spectroscopy analysis, morphological investigation, and disintegrability tests in soil demonstrated the homogenous, ductile, and outstanding biodegradable behaviors of the as-prepared fibers.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1106 - 1116"},"PeriodicalIF":4.7,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanocomposites Prepared in Supercritical Carbon Dioxide from Epoxidized Soybean Oil, Citric Acid, and Cellulose Nanofibers","authors":"Zengshe Liu,&nbsp;H. N. Cheng,&nbsp;Atanu Biswas,&nbsp;Michael Jackson,&nbsp;Nasib Qureshi","doi":"10.1007/s10924-024-03471-7","DOIUrl":"10.1007/s10924-024-03471-7","url":null,"abstract":"<div><p>There is increasing interest in using green and sustainable materials as replacements for petroleum-based polymeric materials. Plant oils are of particular interest as raw materials for the synthesis of new polymers for different applications. In this work, we have made novel green nanocomposites comprising epoxidized soybean oil (ESO), citric acid (CA), and cellulose nanofibrils (CNF) using supercritical carbon dioxide, without a catalyst or an accelerator. Both polymeric foamed products and bubble-free products could be obtained. The chemical structure of the new products was studied by solid-state and solution-state nuclear magnetic resonance (NMR), together with dynamic mechanical properties and glass transition temperature (T_g). The product was found to contain low-molecular-weight polymers of ESO involving tetrahydrofuran structures in the polymer backbone and ester crosslinks between ESO and CA. The incorporation of nanocellulose was found to increase the T_g and the storage modulus (G’) of the products. The G’ at 25 °C ranged from 0.08 MPa to 0.63 MPa with CNF loading from 0.00 g to 0.24 g. The T_g measured by dynamic measurement ranged from 6.41 °C to 11.07 °C. Effect of CO₂ pressure on the dynamic mechanical properties and T_g showed that the G’ at 25 °C ranged from 0.10 MPa to 0.14 MPa when the pressure changed from 55.2 bar to 75.8 bar, while the T_g changed from 6.70 °C to 7.28 °C under these conditions. With the aids of gel contents, TGA and FTIR results, the formation of crosslinked nanocomposites would be confirmed.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1117 - 1130"},"PeriodicalIF":4.7,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polymeric Nanocomposite Adsorbent of Cross-linked Chitosan-adipic Acid and SnO2 Nanoparticles for Adsorption of Methyl Orange Dye: Isotherms, Kinetics, and Response Surface Methodology","authors":"Ahmed Saud Abdulhameed,&nbsp;Rima Heider Al Omari,&nbsp;Al Omari,&nbsp;Samaa Abdullah,&nbsp;Alaa A. Al-Masud,&nbsp;Mahmoud Abualhaija,&nbsp;Sameer Algburi","doi":"10.1007/s10924-024-03453-9","DOIUrl":"10.1007/s10924-024-03453-9","url":null,"abstract":"<div><p>In the present work, a polymeric nanocomposite adsorbent of cross-linked chitosan-adipic acid and SnO₂ nanoparticles (CS-ADP/SnO₂) was created for the adsorption of methyl orange (MO) dye from water. Response surface methodology (RSM) was used to examine how three factors affected the adsorption of the dye MO: time C (10–40 min), pH (4–10), and CS-ADP/SnO₂ dosage (0.02–0.08 g/L). The CS-ADP/SnO₂ nanocomposite has a BET surface area of 28.64 m²/g, a total pore volume of 0.0271 cm³/g, and a mean pore diameter of 3.79 nm. The several XRD diffraction peaks and average crystallite size of 31.33 nm of the CS-ADP/SnO₂ nanocomposite indicate that it primarily possesses polycrystalline properties. The MO adsorption by CS-ADP/SnO₂ could be well described by the isotherm model, which was validated by the adsorption kinetics and Freundlich and pseudo-first-order kinetic models. The best circumstances for maximum MO elimination (80.54%) were found to be a pH of 4, a CS-ADP/SnO₂ dosage of 0.055 g/L, and a contact period of 40 min, according to the results of the BBD model. At 25 ^oC, the maximal adsorption capacity of the CS-ADP/SnO₂ nanocomposite toward the MO dye was 344.91 mg/g. The Yoshida H-bonding, electrostatic interaction, hydrogen bonding, and n-π stacking interaction, were postulated as the mechanisms for MO dye adsorption onto CS-ADP/SnO₂ nanocomposite. In summary, this research suggests that the composite has the ability to effectively remove organic dyes from water systems, making it a promising new adsorbent.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1086 - 1105"},"PeriodicalIF":4.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of Drug Carrier Material with Targeted and Sustained-Release from Modified Lignin","authors":"Chenghan Li,&nbsp;Zijing Zhou,&nbsp;Yiping Li,&nbsp;Xudong Zhu,&nbsp;Hong Yan,&nbsp;Fen Li","doi":"10.1007/s10924-024-03464-6","DOIUrl":"10.1007/s10924-024-03464-6","url":null,"abstract":"<div><p>In this paper, the modified lignin drug carrier materials with targeted slow release effect were studied. 0.2 g of alkali lignin was added to 20 mL of acetylation reagent (the ratio of acetyl bromide to acetic acid is 8:92) at 50 °C, sealed and stirred for 3 h for acetylation reaction, rotary evaporation for 30 min, drying to a fixed weight, to obtain acetylated lignin, recorded as ACAL. Dissolve 2.0 mg of ACAL in 10 mL of 99.5% ethanol solution and stir continuously at room temperature for 2 h. Deionized water is added during mixing until the desired water content is reached. After continuous stirring for 10 min, the lignin-coated material was obtained by rotating evaporation for 2 h. 5 mL prepared ACAL solution (6 mg/mL) and 5 mL prepared PTX solution (10 mg/mL) were mixed, and 0.15 V/min was dropped into deionized water magnetic force and stirred for 16 h until the final water content was 99%. The suspension was transferred to a rotary evaporator, evaporated for 2 h, and dried to constant weight to obtain the lignin/paclitaxel drug carrier system, labeled as ACAL/PTX materials. Fourier transform infrared spectroscopy (FIRS), hydrogen nuclear magnetic resonance (¹H-NMR), ultraviolet-visible spectroscopy (UV), field emission scanning electron microscopy (SEM) and Zeta potential were used to study and characterize the modified lignin drug carrier materials with targeted and sustained release. The drug release, toxicity, distribution and anticancer effect in vitro were studied. The results show that the solubility of acetylated lignin in alcohol is 1.14 times that of alkali lignin. he modified acetyl group replaced the free phenol hydroxide group in the benzene ring of lignin, and the structure of lignin itself did not change. Lignin coating material is hollow porous nanospheres, and its drug loading rate and encapsulation rate reach 17.8% and 71.23% respectively. acilitate release rate was only 21.94% when pH value of human gastric juice was 1.2. The release rate of facilitate could reach 74.81% at pH 5.5 of simulated tumor cells. Significant drug release occurred within the first 10 h. When the concentration of lignin carrier material was 10–100 mg/mL, the survival rate of cells was greater than 95%, indicating that lignin coated material was non-toxic and had stable slow-release and targeting effect. In addition, the biological distribution of facilitate in mice showed that PTX was mainly concentrated in tumor sites of mice, but in liver, spleen, lung and kidney was low. In the anti-cancer effect test, the tumor cells were significantly reduced after 5 consecutive administration, which also proved that the lignin/PTX drug delivery system has high targeting and anti-cancer effect.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1069 - 1085"},"PeriodicalIF":4.7,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable Chitosan-Aminated Starch Blends as Innovative Materials for Advanced Optical Applications","authors":"Amritha Radhakrishnan,&nbsp;Unnikrishnan Gopalakrishna Panicker","doi":"10.1007/s10924-024-03462-8","DOIUrl":"10.1007/s10924-024-03462-8","url":null,"abstract":"<div><p>The development of bio-based polymer blends for optoelectronic applications constitutes a pivotal and sustainable approach in the domain of materials science. In this work, biopolymer films, having a low bandgap and high optical conductivity, have been developed using chitosan and aminated starch, through a casting route. Initially, aminated starch synthesised by reductive amination was subjected to the evaluation of its structural, optical, thermal, and morphological features. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-visible ), field emission scanning electron microscopy (FE-SEM), contact angle evaluation, mechanical studies, biodegradability evaluation, and thermal examinations were executed to evaluate the functional performance of the blends, duly assisted by computational analysis. FE-SEM confirmed the homogeneity, while XRD indicated the amorphous nature of the blends. Thermogravimetric analysis (TGA) highlighted the increase in thermal stability with an increase in the aminated starch content in the blends. The UV-visible measurements indicated high optical conductivity (7 × 10⁹ S/cm) and increased absorption coefficient (56 mm⁻¹) for an optimized blend with high aminated starch content. The energy band gap has been found to reach 2.3 eV, which makes the system a potential candidate for various optoelectronic applications. Computational analysis based on density functional theory (DFT) has been found to support the experimental observations effectively.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1047 - 1068"},"PeriodicalIF":4.7,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Disintegration of Biodegradable Plastic Bags in Marine Mesocosm Conditions: The Effects of Time and Temperature","authors":"Hannah I. Collins,&nbsp;Larissa Tabb,&nbsp;Bridget A. Holohan,&nbsp;J. Evan Ward","doi":"10.1007/s10924-024-03470-8","DOIUrl":"10.1007/s10924-024-03470-8","url":null,"abstract":"<div><p>Plastic pollution in the marine environment is a persistent and ubiquitous issue. Biodegradable and compostable plastics may present a positive alternative to traditional non-biodegradable polymers for marine applications such as aquaculture. Mater-Bi (MB) is a starch-based polymer used in compostable films and plastic carrier bags and has been proven to completely biodegrade in a variety of laboratory conditions. However, degradation rates in the natural environment differ from static laboratory tests and depend on the specific physicochemical and environmental conditions of a particular location. This study examined the degradation of Mater-Bi in coastal marine conditions in a flow-through mesocosm system, in comparison to polyhydroxybutyrate (PHB), a well-known biopolymer, and high-density polyethylene (HDPE), a traditional plastic polymer. Mass and area loss were both used as proxies for disintegration across a nine-month time span. Results indicate that both Mater-Bi and polyhydroxybutyrate disintegrate when exposed to shallow water column and sediment conditions, losing on average 25 to 47% of area or mass, whereas high-density polyethylene showed no evidence of degradation. Loss of area and mass of Mater-Bi and polyhydroxybutyrate were especially pronounced, averaging 0.87%/week after 30 weeks of submergence when water temperature increased to 20 °C. The disintegration of biodegradable plastics through microbial action over time and in warmer temperatures likely contributed to these results. Biodegradable plastics such as Mater-Bi may therefore have a lower environmental impact and persist in the marine environment for shorter periods of time than conventional non-biodegradable polymers.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1035 - 1046"},"PeriodicalIF":4.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste Fish Oil is a Promising Substrate for Productive Synthesis of Degradable Polyhydroxyalkanoates","authors":"Evgeniy G. Kiselev,&nbsp;Aleksey V. Demidenko,&nbsp;Natalia O. Zhila,&nbsp;Vladimir V. Volkov,&nbsp;Tatiana G. Volova","doi":"10.1007/s10924-024-03461-9","DOIUrl":"10.1007/s10924-024-03461-9","url":null,"abstract":"<div><p>Waste fish oils (WFOs) obtained from the wastes of <i>Sprattus balticus</i> and <i>Scomber scombrus</i> have been investigated as a new substrate for the synthesis of polyhydroxyalkanoates (PHA). WFOs produced by thermal or enzymatic methods had some differences in the ratio of fatty acids and lipid saturation. <i>C. necator</i> B-10,646 bacteria, grown in a laboratory Bio-Flo fermenter with high mass transfer characteristics and a high degree of emulsification of WFO fat, provided high productivity in all variants, superior to other substrates (sugars, glycerol, etc.). The total yield of bacterial biomass and PHA content obtained on WFO from smoked sprat heads by thermal or enzymatic method was 87.4 and 109.7 g/L and 75.6 and 81.0%, respectively, for 30 h of cultivation, which slightly exceeded the results obtained using WFO from fresh mackerel heads. Under studied conditions, bacteria utilized the entire spectrum of fatty acids in WFO lipids including polyenoic and saturated fatty acids. This ensured a high degree of utilization of WFOs by bacteria (92.3–94.7%). The synthesized PHA samples were represented by poly(3-hydroxybutyrate-<i>co</i>-3-hydroxyvalerate-<i>co</i>-3-hydroxyhexanoate) with similar degrees of crystallinity, molecular weight and temperature characteristics. The studied WFOs can be recommended as a new and renewable substrate for productive synthesis of PHA.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1022 - 1034"},"PeriodicalIF":4.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural Modification of Polyacrylic Resin by Hydroxamic acid to Increase the Adsorption Performance for rare Earth ions","authors":"Guangyu Duan,&nbsp;Chunjie Zhou,&nbsp;Xiaoya Li,&nbsp;Zhanfang Cao,&nbsp;Feipeng Jiao,&nbsp;Hong Zhong,&nbsp;Xin Ma,&nbsp;Shuai Wang","doi":"10.1007/s10924-024-03463-7","DOIUrl":"10.1007/s10924-024-03463-7","url":null,"abstract":"<div><p>Typically, traditional rare earth element (REE) extraction processes generate industrial effluents rich in REEs, resulting in significant resource waste and environmental pollution. Hence, there are important practical applications for the preparation of adsorbents with high adsorption efficiency and superior stability for the recovery of REEs. In this work, a poly(6-(N-acetyl-acryloylamino) hexyl hydroxamic acid) (PAAHA) chelating resin was successfully prepared by grafting 6-acetyl amino hexyl hydroxamic acid onto polyacrylic resin (D113). The PAAHA chelating resin was utilized for the removal of La³⁺, Ce³⁺, and Y³⁺, and the maximum uptake capacities determined from the batch adsorption experiments were 2.10, 2.38, and 3.98 mmol/g, respectively, which were 3.09, 3.05, and 9.05 times greater than those of the D113 resin. The results demonstrated that the adsorption process was consistent with the pseudo-second-order kinetic and Langmuir isotherm models, suggesting that monolayer chemisorption was the dominant process. Concurrently, five successive adsorption‒desorption cycles revealed that the PAAHA chelating resin displayed remarkable reproducibility and stability. Notably, the –CONHOH group exhibited a marked affinity for REEs, resulting in the formation of stable five-membered rings via mechanism characterization. In summary, this resin represents a novel strategy for designing adsorbents and shows considerable promise for the remediation of mining tailings containing REEs.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"1006 - 1021"},"PeriodicalIF":4.7,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}