Journal of Cleaner Production
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2023
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IF 11.1
Zhenxiong Ye,Huidi Zhang,Xujie Chen,Lifeng Chen,Kunyapat Thummavichai,Xinpeng Wang,Toyohisa Fujita,Yuezhou Wei
Palladium is versatile in many industrial applications due to its distinct physicochemical properties . Due to the scarcity of natural resources and the growing market demand, palladium recovery from wastes such as spent catalysts is receiving increasing attention. Here, a silica-supported thiourea resin (SiPS-TU) was prepared and applied to separate Pd(II) from spent catalysts. The SiPS-TU was fabricated through in situ polymerization and post modification method using amorphous macroporous silica as the matrix. Experimental results suggested that the optimal acidity for the adsorption process was 0.1 M under selected range, and the uptake of SiPS-TU was affected by H + and Cl − . The adsorbent showed rapid sorption kinetics with an equilibrium attained in 30 min, while more than 3 h was required for the commercial D840 resin. Column tests showed that SiPS-TU had excellent dynamic separation property for Pd(II) in continuous process. Around 215 bed volumes (430 mL) of Pd(II) solution could be effective treated by the SiPS-TU bed before breakthrough at 4 mL/min, while D840 resin bed was less effective under equivalent conditions (20 mL). In view of its satisfactory adsorption performances, palladium was successfully separated from the catalyst leaching solution by SiPS-TU. XPS spectra and DFT calculations indicated that the adsorption mechanism of SiPS-TU for Pd(II) mainly involved anion exchange and coordination. In conclusion, this study provides a feasible material for palladium recovery from practical leachate.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2017
·Vol. 314
·期 1
·59-67
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IF 1.282
Liu Zhanxiang,Dong Yang,Liao Jiali,Li Xingliang,Yang Jijun,Yang Yuanyou,Luo Shunzhong,Liu Ning
A novel extractant, 5-octyloxymethyl-7-bromo-8-quinolinol (HBrO 8 Q), was employed to extract Pd(II) from low-acidity aqueous solution. The extraction behaviors indicated that HBrO 8 Q had high extraction efficiency and selectivity for Pd(II) under the experimental conditions, and the stoichiometry of Pd(II) with HBrO 8 Q was found to be 1:1 by means of mole ratio method and Job’s method. The thermodynamic study indicated that the extraction process was endothermic and spontaneous. Additionally, complete back extraction of palladium could be achieved by using acidic thiourea solution.
研究领域:
化学
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环境科学
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DOI
高影响因子
Arabian Journal of Chemistry
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2020
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IF 4.762
Zhen Huang,Chen Wang,Jiling Zhao,Shixing Wang,Yang Zhou,Libo Zhang
A new adsorbent was successfully fabricated by chemically linking pyromellitic acid onto a zirconium-based metal-organic framework composite for selective adsorption of Pd(II) from an aqueous solution. The adsorbent was characterized by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller equation and scanning electron microscope. The adsorption capacity, selectivity and repeatability of the adsorbent were tested by batch experiments. The optimum pH was 2.0, and the maximum adsorption capacity at room temperature was 226.1 mg/g. In the kinetic experiments, the adsorption process achieved equilibrium within 5 h and generally conformed to the quasi-second kinetics and Freundlich isotherm model. The N-H and O H groups on the adsorbent interacted with Pd(II) by electrostatic and coordination action. The adsorbent maintained excellent adsorption capacity after at least 5 cycles. At the same time, the selectivity of the adsorbent in aqueous solution is excellent from interfering ions. Therefore, the new adsorbent will have an obvious application prospect on the recovery of palladium.
研究领域:
化学
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环境科学
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高影响因子
RSC Advances
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2016
·Vol. 6
·期 83
·79781-79791
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IF 3.289
Yanmei Luo,Junhui Ran,Rong Chen,Xinjian Cheng
Porous organic polymers (POPs) were prepared via two-step reactions. In the first step, dialdehyde compounds were synthesized using the Suzuki–Miyaura coupling reaction, and in the second step, the dialdehyde compounds reacted with hydrazine hydrate to form polymers using Schiff’s base formation reactions. These POPs are nanosheet-layer structured, crystalline and fluorescent. They were studied using FTIR, fluorescence spectra, UV-Vis, SEM, TEM, XRD, DSC, and TGA. It was found that the pore parameters, such as specific surface areas and pore diameters, of the POPs could be adjusted by changing the reaction time and temperature. The specific surface areas increased with the increasing of reaction time and temperature. The maximum specific surface area could reach 715.6 m2 g−1. Furthermore, the POPs could detect and remove Pd(II) ions and organic dyes. When in contact with Pd(II) ions, the fluorescence of the POPs was quenched, and the POPs could absorb Pd(II) ions as well. The maximum absorption capacity for Pd(II) ions could reach 20.6 mg g−1 within 5 min. Meanwhile, the POPs could absorb two model dyes, rhodamine B (RhB) and methylene blue (MB), with high efficiency within 5 min.
研究领域:
材料科学
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环境科学
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高影响因子
HYDROMETALLURGY
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2021
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IF 4.156
Wei Shi,Ying Hu,Quan Li,Tianqi Lan,Xueyan Zhang,Jing Cao
Unlike sulfur-containing extractants, extraction efficiency of extractants containing N atoms is often affected by the concentration of H + , but strong affinity of sulfur to Pd(II) may cause stripping process not smoothly. Since sulfur atom conjugated with C C decreases electron cloud density on S atom, a novel polymer extractant containing vinyl sulfide motifs (Poly-EDDYPF) was designed and prepared in this paper, the investigation of this acid resistant extractant shows that the polymer has high extraction efficiency of Pd(II) over 99% with nicely acid resistant. The loading experiment shows that the capacity of Pd(II) of Poly-EDDYPF is up to 268 mg/g. Nearly 95.6% Pd(II) in loaded organic phase could be easily stripped using acid thiourea solution (1 mol/L HCl + 0.1 mol/L thiourea) and the organic phrase could be reused at least 5 cycles without significant decrease of the extraction efficiency. The optimized conditions for the extraction process are given: [HCl] =1 mol/L, contact time = 20 min, amount of extractant =0.7 g/L, O/A ratio = 1/1. H + concentration and Cl – concentration exhibit practically no effect on extraction efficiency.
研究领域:
化学工程
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材料科学
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高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Lun Wang,Keming Wang,Ruihua Huang,Zhen Qin,Yingchun Su,Shanshan Tong
In the past few years, two-dimensional (2D) nanomaterials have emerged great potential for the removal of valuable metals and the capture of polluted-heavy metals. Herein, hierarchically flower-like microcrystals with 2D WS 2 nanosheets (F-WS 2 MCs) were prepared by one-pot hydrothermal synthesis strategy and its adsorption performances for precious metals were systematically assessed. The excellent adsorption efficiencies of ∼86.8%, ∼27.6%, and ∼94.1% towards Ag (I), Pd (II), and Au (III) respectively were achieved within 120 min, and the adsorption curves were in good agreement with a pseudo-second-order kinetic model showing a fast uptake rate at the optimum pH values (1.30 for Au (III), 1.43 for Ag (I), and 3.20 for Pd (II)). The adsorption isotherm followed well in the Langmuir model with the maximum removal capacities ( q max ) of 186.2 mg g −1 for Ag (I), 67.29 mg g −1 for Pd (II), and 1340.6 mg g −1 for Au (III), respectively. Furthermore, for recycling purposes, the relevant desorption solution was investigated with different ratios of monobasic acid and thiourea , suggesting the best desorption efficiency of 93.03%, 88.08%, and 85.34% for Ag (I), Pd (II), and Au (III), respectively. By characterizing the crystalline phase, and micromorphology element mapping of F-WS 2 MCs before and after adsorption, the strong affinity and significant adsorption–reduction were indicated to dominate the adsorption process. Therefore, this work broadens the application range of WS 2 microcrystals, providing an alternative material for capturing precious metals and wastewater treatment applications.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xuan Huang,Ming Yi,Kewen Tang
To address resources shortage and environmental degradation, noble metal recovery from e-waste is in desperate need. Herein, to achieve selective extraction of gold (Au) and palladium (Pd) from practical e-waste, a series of tridentate thioether extractants are designed with ester functional groups at both ends of the thioether. By varying the chain length of the ester alkyl, the relationship between extractant structure and performance is further explored. The results indicate that the as-introduced tridentate structure facilitate the Au(III) and Pd(II) extraction, demonstrating a complex mechanism involving both coordination substitution and ion association. Notably, the extractant with the shortest carbon chain length and smallest molecular weight delivers outstanding extraction capacities of 920.2 mg/g for Au(III) and 280.7 mg/g for Pd(II). More importantly, it exhibits superior selectivity (∼100 %) for Au(III) and Pd(II) in complex metal solutions. This work guides the design of thioether-based extractants for sustainable recovery of noble metal from practical e-waste.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Lina Guo,Ligang Yan,Ruijun Xie,Limin Han,Ning Zhu
In this work, we investigate a palladium complex exhibiting aggregation-induced emission enhancement (AIEE) properties and remarkable solvatochromism behavior driven by structural changes arising from solvent-solute interactions. Specifically, in polar aprotic solvents, the color of the Pd complex changes from blue to purple as solvent polarity increases, accompanied by a blue shift in the UV–Vis spectrum. Notably, this blue shift is even more pronounced in polar protic solvents, which also show a significant increase in fluorescence emission. These effects are likely driven by hydrogen-bond interaction between the protic solvents and the Pd complex. Density Functional Theory (DFT) calculations show that increased solvent polarity significantly alters the electronic distribution of the Pd complex. Higher solvent polarity leads to a higher orbital transition energy, resulting in a blue shift in the UV–Vis absorption spectrum. X-ray single-crystal structure analysis further reveals that hydrogen-bonding interactions between the Pd complex and methanol stabilize its planar structure. When water is introduced, the Pd complex undergoes aggregation through non-covalent interactions, which modify the stacking arrangement. This change weakens the π-π interactions between adjacent molecules, thereby minimizing energy loss in the system. Consequently, the Pd complex effectively utilizes the AIEE mechanism to detect water content in methanol.
研究领域:
化学
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材料科学
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2016
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IF 2.653
Man Qiao,Junze Jiang,Jidong Yang,Shaopu Liu,Zhongfang Liu,Xiaoli Hu
Based on l -tryptophan-Pd(II) system, a sensitive and selective fluorimetric assay for the quantification of ceftriaxone (CTRX) had been developed. The experimental results showed that in pH 4.0 Britton–Robinson (BR) buffer medium, the fluorescence of l -tryptophan ( l -Trp) ( λ ex / λ em = 276 nm/352 nm) could be efficiently quenched by Pd(II). When CTRX was added to the mixed solution of the l -tryptophan and Pd(II), the fluorescence of l -Trp recovered. The reaction mechanism and the reasons for the fluorescence recovery were also discussed. Pd(II) reacted with l -Trp to form a 1:1 chelate complex, and then, after CTRX was added in l -Try-Pd(II) system, the ligand exchange reaction occurred between l -Trp and CTRX, which resulted in the fluorescence recovery. Under the optimized experimental conditions, the recovered fluorescence intensities at 352 nm showed excellent linear relationship with the concentration of CTRX over the range of 6.0 × 10 − 8 –2.4 × 10 − 6 mol L − 1 (0.040–1.59 μg mL − 1 ). The correlation coefficient (R) was 0.9997 and the detection limit was 1.8 × 10 − 8 mol L − 1 (11.9 ng mL − 1 ). Furthermore, the assay had been applied to determine trace amount of CTRX human urine samples with satisfactory results.
研究领域:
分析化学
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环境与生物医学分析
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荧光传感器
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DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2018
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IF 3.974
Yuan Chen,Yuancai Chen,Jingyi Wu,Jianyi Zhang
In this paper, we found a bacteria ( Bacillus wiedmannii MSM) that could not only culture quickly under aerobic condition , but also can biological reduction of Pd (II) under both aerobic and anaerobic conditions. For reducing Pd (II) by Bacillus wiedmannii MSM, the best electron donor was sodium formate and the best growth time was 24 h (mid-log growth phase cells). TEM indicated that a lot of palladium nanoparticles (Pd-NPs) were mainly located in the periplasmic space of the live cells. However, the autoclaved cells could not synthesize Pd-NPs, which proved the role of enzyme in the reduction of Pd (II). A few of Pd-NPs were only formed on the surface of Cu 2+ -treated cells, which proved the main but not the only role of periplasmic hydrogenase in the reduction of Pd (II). XRD and XPS also proved that Pd-NPs could be synthesized by live cells over broad ranges of temperature (20–40 °C) and pH (pH 3.0–7.0). This may be especially useful for in situ reduction and remediation of Pd (II) for both anaerobic and aerobic wastewater.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2021
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IF 1.134
Yan-Xiong LIU,Long-Chun BIAN,Jie-Ren XIA,Qiu-E CAO
A novel Pd(II) ion-imprinted polymer (Pd(II)-AAP-IIP@VMWCNTs) was constructed by using 2-( N -allyl)aminopyridine (AAP), vinyl functionalized multi-walled carbon nanotubes (VMWCNTs), ethylene glycol dimethacrylate (EGDMA) and Na 2 PdCl 4 as functional monomer, carrier, cross-linker and template ions, respectively. The structure, morphology, adsorption property and applicability as adsorbent in solid phase extraction were characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), binding experiment and solid phase extraction (SPE) experiment, respectively. The equilibrium adsorption capacity and imprinting factor of Pd(II)-AAP-IIP@VMWCNTs for Pd(II) were found to be 9.053 mg/g and 3.46, respectively. The SPE column packed with Pd(II)-AAP-IIP@VMWCNTs displayed good adsorption selectivity to Pd(II). The adsorption rate and extraction rate of this column to Pd(II) were more than 90% and 74%, but below 40% and 15% to the other coexisting ions under the optimized SPE conditions. The obtained Pd(II)-AAP- IIP@VMWCNTs-based SPE method could be combined with inductively coupled plasma optical emission spectroscopy (ICP-OES) for determination of Pd(II) in environmental water. The recoveries were in the range of 87.2%–91.6% with the relative standard deviations of 2.5%–6.8%.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
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IF 5.2
Zhenzhen Tang,Derong Xu,Hongyu Chen,Si Tang,Chunlin He,Shunyan Ning,Min Li,Guoyuan Yuan,Shuangkou Chen,Jian Feng
Metal-organic frameworks are recognized as a new kind of potential adsorbent for wastewater treatment because of their tunable pore size, high surface area and modifiable functionality. In this work, 2,6-diaminopyridine functionalized UiO-66-NH 2 (UiO-66-DAP) was synthesized by a post-modification strategy and was applied to the adsorption of Pd(Ⅱ) from aqueous solution. The aminopyridine structure on UiO-66-DAP greatly improved the adsorption performance for Pd(II), with an adsorption capacity of 190.95 mg/g. The adsorption process of Pd(Ⅱ) on UiO-66-DAP was consistent with the pseudo-second-order kinetic model and the Langmuir adsorption isotherm . Thermodynamic studies confirmed that the adsorption process was endothermic and spontaneous. Regeneration studies showed that UiO-66-DAP was stable and recyclable. Moreover, UiO-66-DAP could maintain high selectivity to Pd(Ⅱ) even in a wastewater containing multiple interfering metal ions. According to the results of Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), zeta potential , comparative experiments and DFT calculations, the chelation and electrostatic attraction between Pd(Ⅱ) and the aminopyridine structural unit are the dominant mechanisms. Using UiO-66-DAP as an adsorbent, this study provides a promising way for the separation of palladium form wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）