Journal of Saudi Chemical Society
·
2022
·
IF 4.712
Tao Chen,Ning Sun,Yuan Zhao,Jie Gao,Guowen Hu,Xiaobing Han,Yayang Tian,Linfeng Chen,Guobao Huang,Bing Li
A new aminophosphonic acid chelating resin was successfully prepared via electron beam irradiation grafting combined with chemical modification and used for the efficient removal of La(III). Firstly, glycidyl methacrylate (GMA) was grafted to polystyrene microspheres (PS) via electron beam co-radiation to obtain PS-PGMA microspheres, then followed by the amination with diethylenetriamine (DETA) to formed PS-PGMA-DETA (PGD) microspheres through nucleophilic substitution between amino and epoxy group, and finally PS-PGMA-DETA-PA (PGDP) microspheres was obtained by phosphorylation with phosphorous acid (PA). The obtained chelating resin absorbent was characterized by Fourier-transform infrared (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), which demonstrated that the millimetric aminophosphonic acid chelating resin were successfully prepared with well-defined morphology and enhanced thermal stability. The X-ray photoelectron spectroscopy (XPS) characterization results confirmed a possible adsorption mechanism, which is mainly based on the chelation and coordination of N and O in PDGP with La(III) in the solution. A series of parameters were taken into account in the adsorption experiment, such as absorbed dose, GMA concentration, dosage of PGDP, pH, contact time, temperature, and the initial concentrations of La(III). The maximum adsorption capacity obtained from the research can be achieved 288.69 mg/g at 298.15 K, pH = 6. The kinetic sorption for for La(III) fitted the type 1 pseudo-second-order (R 2 = 0.9981), which revealed that the La(III) are chemisorbed on the surface of the PGDP. It was concluded that the La(III) adsorption conformed to the Freundlich equation, indicating a multilayer adsorption process. Thermodynamic data indicated that the La(III) uptake process was a spontaneous and endothermic. In addition, this research provided a new irradiation grafting method for rare earth ions removal.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Jing-Yan Kang,Wei Ha,Yan-Ping Shi
A novel magnetic C 3 N 5 framework material (Fe 3 O 4 /C 3 N 5 ) was developed as a high selectivity extractant for La(III) determination in food samples. The Fe 3 O 4 /C 3 N 5 material was synthesized by thermal deammoniation method and has larger surface area (100.3 m 2 g −1 ) and more effective adsorption sites compared with that of individual C 3 N 5 material (19.4 m 2 g −1 ). It was proved that Fe 3 O 4 /C 3 N 5 material displayed excellent selectivity and adsorption capacity for La(III). In addition, adsorption isotherm and kinetic data indicated that La(III) adsorption based on Fe 3 O 4 /C 3 N 5 material is a monolayer adsorption which is compatible with Langmuir model and follows a pseudo-second-order kinetic equation. By using Fe 3 O 4 /C 3 N 5 material as extractant, an analytical method was established with low limits of detection (3σ, n = 6) of 10.4 μg L −1 , reasonable recoveries ranged from 86% to 106% and good precision with the RSD less than 10.7%. The analytical method was further applied to the determination of trace La(III) in food sample. It evinced that the concentration of La(III) in sea fish is 13.2 μg kg −1 and the content of 138 La is 0.138 μg kg −1 , which is 1.03% of total La(III).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Lei Tan,Zengjin Fu,Jing Wang,Wenyue Jiao,Tianwen Huang,Yan Hao,Yicheng Wang,Tingrui Lin
In this paper, poly(sodium styrene sulfonate) (PSS) hydrogel was synthesized following a one-step free-radical polymerization with N, N -methylene-bis-acrylamide (MBA) as a cross-linker. La(III) and Ce(III) were effectively removed from acidic aqueous solutions by using PSS hydrogel. FTIR, TGA, XRD, SEM, zeta potential analysis, and XPS were used to characterize the morphology and microstructure of PSS hydrogel. By varying pH, adsorbent dose, contact time, initial La(III) and Ce(III) ions concentrations, and interfering ions, the adsorption behavior of La(III) and Ce(III) ions on PSS hydrogel was studied. According to the experimental data, PSS hydrogel exhibited adsorption capacities above 200 mg·g −1 for La(III) and 180 mg·g −1 for Ce(III) over a wide pH range. Furthermore, adsorption data was simulated using pseudo-first order, pseudo-second order and intra-particle diffusion kinetic equations. For the description of adsorption equilibrium, Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isothermal models were used. According to the results, the Langmuir isotherm equation provided the best fit. Based on the Langmuir isotherm equation, the maximum absorption capacities of La(III) and Ce(III) by PSS hydrogel was 241.0 and 223.7 mg·g −1 , respectively. According to FTIR and XPS analysis, sulfonic acid groups were involved in the adsorption of La(III) and Ce(III) ions. And ion exchange and complexation were the main mechanisms involved. Finally, reusability tests reveal that the PSS hydrogel can be reused 13 times without losing effectiveness.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 8.3
Jing Pan,Yongde Yan,Yanghai Zheng,Shengrong Guo,Xuepeng Wang,Sihao Wang,Zhiguang Du,Kaijie Wang,Yun Xue,Kai Zhu
A method for the preparation of LaNi 5 alloy by molten salt co-reduction is reported. The electrochemical co-reduction process of La(III) and Ni(II) as well as the reaction process of intermetallic compounds formation were investigated. It was confirmed that the diffusion coefficient of La(III) in LiF–CaF 2 molten salt is 4.684–8.098 × 10 −5 cm 2 s −1 at temperatures of 1113–1183 K. And the reaction activation energy was obtained to be 78.86 kJ mol −1 . And, the exchange current densities of La(III)/La(0) were determined by the Tafel (0.149–0.251 A cm −2 ) and linear polarization (0.143–0.204 A cm −2 ) methods. Furthermore, five different La–Ni intermetallic compounds were detected by studying the co-reduction reaction of La(III) and Ni(II) ions. Meanwhile, the formation potentials of La–Ni intermetallic compounds were defined by various electrochemical tests. In addition, the LaNi 5 alloy was obtained via potentiostatic electrolysis according to the electrochemical results. This study provides new insights into the electrochemistry of the LiF–CaF 2 –LaF 3 –NiF 2 molten salt and enhances the understanding of the molten salt electrolytic preparation of La–Ni alloys from co-reduction.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2025
·
IF 2.3
Saeed Ahmed Memon,Jiaxin Duan,Wenting Li,Yun Wei
The enhancement and removal of rare earth ions from wastewater resources have emerged as a crucial study to ensure the superior quality of rare earth resources application. In this work, amide humic acid-coated Fe3O4 magnetic nanoparticles (Fe3O4@AHA MNPs) were fabricated by chemical coprecipitation hydrothermal technique. The fabricated nanoparticles showed excellent stability in aqueous solutions. They could be easily collected from solutions using a magnetic separation strategy. Adsorption studies were used to investigate the adsorption performance of Fe3O4@AHA MNPs for La (III) under a variety of circumstances. Furthermore, isothermal adsorption lines and kinetic and thermodynamic modeling were used to examine the adsorption mechanism of La (III). Results revealed that Fe3O4@AHA MNPs had a high adsorption capacity of 148.83 mg g−1 and adsorption equilibrium was attained after 45 min when the adsorbent dose was 20 mg at pH 6. Fe3O4@AHA MNPs demonstrated high reusability for La (III), retaining 78.5% of initial adsorption capability after five cycles. Finally, the fabricated Fe3O4@AHA MNPs was successfully employed and applied to remove La (III) from industrial wastewater samples. According to these results, the Fe3O4@AHA MNPs have potential to be a useful material for enrichment and preconcentration of La (III) or other trivalent lanthanides from wastewater.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Liqiong Wu,Ming Yang,Lifeng Yao,Zhangyang He,Jun-xia Yu,Weiyan Yin,Ru-an Chi
In this study, polyaminophosphoric acid (PA)-functionalized ion-imprinted chitosan (CS) aerogel was fabricated for the first time, exhibiting good antibacterial property for selective La(III) recovery and oil/water separation. The as-prepared PA-CS-IIA-2 shows a remarkable adsorption capacity of 114.6 mg/g toward La(III) and high selectivity in the competitive adsorption systems, which is attributed to its abundant imprinting sites and surface functional groups. Benefiting from the amphiphilic property, the PA-CS-IIA-2 also exhibits an excellent adsorption performance for the extractant, oils, and organic solvents. Besides, the PA-CS-IIA-2 presents excellent regeneration and reusability characteristics. Moreover, compared with CS, the PA-CS-IIA-2 exhibits a significantly improved antibacterial activity originating from the PA component. Most importantly, the PA-CS-IIA-2 aerogel is capable of removing multiple pollutants all together and effectively inhibiting bacteria in the complex wastewater environments. Therefore, this study paves the way for developing high-performance rare-earth capture materials with multiple functions to meet diverse applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2020
·
IF 3.104
Mei Li,Yongcheng Zhang,Haiming Li,Hailing Jiang,Wei Han,Yang Sun
In the present work, cyclic voltammetry (CV), square wave voltammetry (SWV) and chronopotentiometry (CP) were used to investigate the electrochemical coreduction behaviors of La(III) and Mg(II) as well as La(III), Mg(II) and Mn(II) on Mo electrode in LiCl + KCl molten salts. CV and SWV results exhibit that the coreduction mechanism of La (III) and Mg(II) on Mo electrode is that La(III) is reduced and Mg–La intermetallic compound is formed, leading to the deposition potential of La(III) shifting to more positive one. The electrochemical signals pertaining to the formation of metallic La, Mg and Mn as well as Mg–La intermetallic compound are also observed by coreduction of La(III), Mg(II), and Mn(II) in LiCl + KCl molten salt on the inert Mo electrode. However, the electrochemical signals associated with the formation of La–Mn and Mg–Mn alloys are not observed, which means that the depolarization effect of La(III) and Mg(II) does not occur on pre-deposited Mn electrode. The Mg–La–Mn alloys were formed by co-deposition of La(III), Mg(II), and Mn(II) on Mo electrode at various concentration ratios of La(III) and Mg(II). The results of scanning electron microscopy equipped with energy dispersive spectroscopy and X-ray diffraction displays that the Mg–La–Mn alloys are comprised of La–Mg compound Mg 17 La 2 , Mg and Mn phases. The concentration ratio of La(III) and Mn(II) has few effects on the alloy composition .
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 49
·108230-108246
·
IF 5.8
Zhang Xiao,Luo Shiwen,Duan Jiaxin,Lan Tao,Wei Yun
Adsorption is an effective method for the removal of hazardous substances from wastewater. In this work, a low-cost and environmental-friendly composite hydrogel material of sodium alginate doped with nitrogen doped carbon dots (SA@NCDs) was fabricated by impregnation for lanthanide and enhanced phosphorus adsorption in wastewater. The effects of NCDs doping amount, dosage, pH, initial solution concentration, adsorption time and temperature on the process of La (III) adsorption by SA@NCDs were investigated. The adsorption isotherms fitted to Langmuir isotherm model (R 2 = 0.9970–0.9989) and the adsorption kinetics followed pseudo-second-order kinetic model (R 2 = 0.9992). The maximum adsorption capacity of the adsorbent for La (III) was 217.39 mg/g according to the Langmuir model at 298.15 K. After five cycles, the removal efficiency of La (III) adsorbed by SA@NCDs was still 85.1%. Moreover, the loaded La (III) enhanced the adsorption of phosphorus. The La (III)-SA@NCDs-5 hydrogel adsorbent greatly improved the adsorption capacity for phosphorus compared with the La (III)-free adsorbent, and the adsorption amount can reach 9.64 mg-P/g. The SA@NCDs complex hydrogels for rare earth adsorption were prepared by introducing NCDs rich in amino group into SA hydrogels. The introduction of NCDs increases the adsorption sites of hydrogels, and also overcomes the problem that NCDs itself is difficult to recover in wastewater treatment applications. The lanthanide adsorbed material has a stable structure and can be used to remove phosphorus to deal with waste using the waste. It indicates the SA@NCDs hydrogel composite adsorbent have good potential for wastewater treatment. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECOLOGICAL INDICATORS
·
2025
·
IF 7.4
Xin Wang,Yue Ben,Wanxin Liu,Qing Zhou,Lihong Wang,Xiaohua Huang
Rare earth elements (REEs) are a type of frequently reported emerging pollutant that affects plant growth. The harm caused by continuous exposure to low-dose REEs has rarely been studied. Quickly, accurately, and non-invasively monitoring the continuous influence of low-dose REEs on plant growth in situ is key to indicating and warning of its harm to plants and ecosystems. In this study, after continuous exposure to low-dose lanthanum [La(III), a REE] for 14 days, invisible damage occurred in leaf cells, and La accumulated continuously in the soybean plants (leaves > stems > roots > pods > seeds), causing potential human health risks. Two proteins [vitronectin-like protein (VN) and arabinogalactan proteins (AGP)] in leaf cells that bound La(III) were selected as biomarkers, and changes in these two proteins were detected by constructing dual-sensors in living leaf cells after continuous exposure to low-dose La(III) for 14 days. The results showed that the electrochemical outputs from leaf cells–the electron transfer resistance R et (VN) and R et (AGP)–were related to the damage indices such as MDA, chlorophyll content, electrolyte leakage, cell vitality, fresh and dry weight of leaves, and leaf area. Using this output, two warning intervals of visible damage were obtained: R et (VN) was 8.53 %–47.22 %, and R et (AGP) was 12.75 %–51.31 %. This study successfully demonstrated the real-time in situ detection of plant cell biomarker changes and invisible damage under low-dose La(III) exposure, providing methods for early warning monitoring of plant damage caused by low-dose continuous exposure to REEs.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2011
·Vol. 60
·期 9
·1355-1361
·
IF 2.056
Xiaonan Zhu,Yihu Song,Shaohui Chen,Peihua Du,Qiang Zheng
An acrylate processing aid (ACR)-based ionomer containing lanthanide (La(III)) ion was synthesized and the influences of the ionomer on thermal stability, fusion time, transparency and tensile properties of rigid poly(vinyl chloride) (PVC) were investigated. Results revealed that the ionomer with a suitable La(III) content behaved as a good stabilizer as well as processing aid to the rigid PVC product. The ionomer could accelerate fusion of PVC much more quickly than ACR because of the strong interaction between La(III) carboxylate and PVC. Moreover, it exhibited a stabilizing efficiency comparable to lanthanum and calcium stearates (LaSt 3 and CaSt 2 ). The composite stabilizer of ionomer/zinc stearate (ZnSt 2 ) exhibited an ability to improve initial discoloration better than LaSt 3 /ZnSt 2 and CaSt 2 /ZnSt 2 because the ionomer could form a complex with ZnSt 2 much more slowly than LaSt 3 and CaSt 2 . The compounds stabilized using ionomer/ZnSt 2 exhibited a transparency comparable to those stabilized using organotin or liquid barium/zinc stabilizers, which was much better than those stabilized using LaSt 3 /ZnSt 2 and CaSt 2 /ZnSt 2 . Copyright © 2011 Society of Chemical Industry
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Qing Shu,Xinyuan Liu,Yanting Huo,Yuhui Tan,Caixia Zhang,Laixi Zou
A novel solid Brönsted-Lewis acid catalyst La-PW-SiO 2 /SWCNTs (single-wall carbon nanotubes) was synthesized from the synergistic modification of H 3 PW 12 O 40 (HPW) by single-walled carbon nanotubes functionalized with sidewall hydroxyl groups (SWCNTs–OH) and La 3+ via sol–gel method. The freshly prepared catalyst was characterized by several methods, and the catalytic activity and stability of it were studied from the esterification of oleic acid and methanol. Results showed that the highest conversion of oleic acid was 93.1% (mass) and maintained as high as 88.7% (mass) after six cycles of La-PW-SiO 2 /SWCNTs. The high catalytic activity and stability of La-PW-SiO 2 /SWCNTs can be attributed to the strong electron withdrawing effect of La 3+ on π bond of SWCNTs , because it can facilitate the formation of a large number of strong Lewis acid sites. Therefore, the reduction of catalytic activity of a solid acid catalyst due to the fact that hydration reaction of its Brönsted acid sites can be effectively reduced. La-PW-SiO 2 /SWCNTs can be an efficient and economical catalyst, because it shows good catalytic activity and stability.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）