JOURNAL OF HAZARDOUS MATERIALS
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2016
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IF 4.836
Chunzhen Fan,Kan Li,Juexiu Li,Diwen Ying,Yalin Wang,Jinping Jia
In this paper, tetraethylenepentamine (TEPA) modified chitosan/CoFe 2 O 4 particles were prepared for comparative and competitive adsorption of Cu(II) and Pb(II) in single and bi-component aqueous solutions. The characteristics results of SEM, FTIR and XRD indicated that the adsorbent was successfully fabricated. The magnetic property results manifested that the particles with saturation magnetization value of 63.83 emu g −1 would have a fast magnetic response. The effects of experimental parameters including contact time, pH value, initial metal ions concentration and coexisting ions on single and bi-component adsorption were investigated. The results revealed that the adsorption kinetic was followed pseudo-second-order kinetic model, indicating that chemical adsorption was the rate-limiting step. Sorption isotherms were also determined in single and bi-component solutions with different mass ratio of Cu(II) to Pb(II) (Cu(II)/Pb(II)) and fitted using Langmuir and Freundlich isotherm models. A better fit for Cu(II) and Pb(II) adsorption were obtained with Langmuir model, with a maximum sorption capacity of 168.067 and 228.311 mg g −1 for Cu(II) and Pb(II) in single component solution, 139.860 and 160.256 mg g −1 in bi-component solution (Cu(II)/Pb(II) = 1:1), respectively. The present results suggest that TEPA modified chitosan/CoFe 2 O 4 particles are feasible and satisfactory adsorbent for efficient removal of Cu(II) and Pb(II) ions.
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
Metals
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2023
·Vol. 13
·期 7
·1253
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IF 2.9
Jiaming Gao,Haiwei Fu,Chen Liu,Yifan Zhu,Xiuqing Fu
Heavy metal pollution in water, particularly Pb ion pollution, has seriously threatened human life and health. Therefore, the manufacture of efficient and sensitive heavy metal ion detection materials is essential. The objective of this study was to improve the electrochemical detection performance of laser-induced graphene (LIG) for Pb(II). Considering the excellent ion affinity and high activity of transition metals, Ni-Fe alloy coatings were prepared on the surface of LIG through jet electrodeposition. The prepared LIG and Ni-Fe/LIG were qualitatively analyzed through Raman spectrometry, X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The surface micromorphologies, charge transfer capabilities, and electrochemically active surface areas of LIG and Ni-Fe/LIG were characterized. The detection range and limit of detection (LOD) of Pb(II) for LIG and Ni-Fe /LIG as electrochemical sensors were analyzed. Results showed that compared with LIG, Ni-Fe/LIG had more surface active sites, a higher charge transfer capability, and a larger electrochemically active surface area that reached 0.828 cm2. Ni-Fe/LIG had a detection range of 20–1200 µg/L and an LOD of as low as 0.771 µg/L. Ni-Fe/LIG demonstrated a better electrochemical detection performance for Pb(II) than LIG when used as an electrochemical sensor.Keywords:Pb(II) detection;Ni-Fe/LIG;jet electrodeposition;electrochemical sensor
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2020
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IF 4.794
Guo Lin,Chen Wang,Xiteng Li,Yunhao Xi,Wei Wang,Libo Zhang,Jun Chang
At present, the functionalized Zr-based coordination polymer for heavy metal ions removal are primarily implemented via post-synthesis, and it is still a challenge to reduce the concentration of heavy metal ions to wastewater discharge standard. In this work, the 2,2′-dithiodipropionic acid modified Zr-based coordination polymer (named as Zr-DTDPA) was prepared by direct synthesis. It presented extraordinary adsorption ability in the process of removing Hg(II)/Pb(II). The optimum pH for Hg(II) and Pb(II) absorption was 4.0 and 6.0, respectively, and the saturated adsorption capacity reached 960 mg/g and 478 mg/g. The adsorption process can be exceedingly fitted by Langmuir isotherm model and pseudo-second-order (PSO) kinetic model, which indicated that chemisorption played a dominant role. Additionally, the maximum selectivity coefficient reached 21.36 × 10 5 and 5605 for Hg(II) and Pb(II). Impressively, the residual contents of Hg(II) and Pb(II) were only 1.04 μg/L and 0.34 mg/L, which respectively reached the concentration standard of Hg(II) and Pb(II) in wastewater. Zr-DTDPA was easy to be regenerated, and the removal rate of Hg(II) had only decreased by 17.15% after ten consecutive cycles. The results of Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) suggested that the adsorption performance of Zr-DTDPA toward Hg(II)/Pb(II) was primarily determined by thiol/thio groups, and the adsorption mechanism was the interaction between sulfur atoms and Hg(II)/Pb(II) ions.
研究领域:
环境科学
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化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Dekai Cheng,Xiaohui Dai,Li Chen,Yanhua Cui,Changwu Qiang,Qian Sun,Jiangdong Dai
Heavy metals such as Pb(II) pollutions in wastewater have been a serious environmental problem. In this study, we loaded polyamide–amine (PAMAM) on the surface of magnetic halloysite nanotubes (MHNTs) via one-step thiol–yne click chemistry to obtain dendritic magnetic halloysite nanotubes (MHNTs-PAMAM) with high-density amine groups for the highly efficient adsorption of Pb(II). The synthesized MHNTs-PAMAM were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and thermogravimetric analysis (TGA), which confirmed the formed nanostructures and chemical features of MHNTs-PAMAM. And batch adsorption experiments were carried out to investigate the effect of pH and other variables on the adsorption amount. Here, TGA shows that PAMAM grafting on halloysite nanotubes (HNTs) achieves a sufficiently high graft ratio of 6.1 wt %, which ensures sufficient active adsorption sites on the surface of the composite. With the increase of the grafted PAMAM generation, the functional group density and adsorption capacity of the material also gradually increased, and the maximum adsorption capacity of the material for Pb(II) was up to 194.4 mg g–1. The adsorption kinetics agrees well with the pseudo-second-order equations, and the equilibrium data can be described by the Langmuir isotherm (R2 = 0.940).
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Bin Liu,Peng Lv,Ruofei Wu,Yonghui Bai,Jiaofei Wang,Weiguang Su,Xudong Song,Guangsuo Yu
The discharge of large-scale industrial solid waste and wastewater has caused severe damage to environmental health. In this study, the adsorption behaviors of Pb(II) and Congo Red (CR) dye in single and binary aqueous systems were investigated using novel functionalized nanoporous glass microspheres (NGM). The NGM material was fabricated from coal gasification fine slag (CGFS) by a simple treatment and characterized using TG, BET, XRD, TEM, FT-IR, and XPS to analyze its physicochemical properties. The adsorption experiments showed that the adsorption amounts of DMA-NGM for Pb(II) and CR were 302.39 mg/g and 342.74 mg/g for the single systems, and 372.73 mg/g and 412.93 mg/g for the binary systems, respectively. The increased adsorption capacity was attributed to the synergistic effect of electrostatic attraction and chelation. Furthermore, the pseudo-second-order model and Elovich model could reasonably describe the adsorption of Pb(II) and CR on DMA-NGM. Pb(II) adsorption on DMA-NGM was monolayer adsorption and CR adsorption was multilayer adsorption. In summary, the results demonstrate the potential of efficient and environmentally friendly adsorbents for the resource recovery of CGFS and the processing of printing and dyeing wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Ruomeng Zhu,Pengling Zhang,Xinxin Zhang,Mei Yang,Ruiqi Zhao,Wei Liu,Zhongyue Li
A key matter in heavy metal removal technology is to develop the adsorbents with efficient adsorption sites. In this study, an oxygen-rich covalent organic framework (JUC-505) was functionalized by carboxyl (−COOH) groups to form synergetic effects aiming for the removal of Cd(II) and Pb(II) ions. JUC-505-COOH shows a high Cd(II) uptake of 504 mg⋅g −1 surpassing most of the reported porous adsorbents. Meanwhile, the kinetics study shows a rapid adsorption process at a high initial concentration (100 mg⋅L −1 ), and the equilibrium can be reached within 5 min. We investigated the adsorption mechanism in-depth by density functional theory calculations, proving the synergistic effects of surface complexation and hydrogen-bond, which are from the post-modified −COOH groups and the in-situ oxygen atoms of JUC-505, respectively. Moreover, under the interference of common ions in natural water, the removal efficiency of Cd(II) is almost insusceptible, which sheds lights on the potential for the application in the natural water purification . In addition, the Pb(II) uptake (559 mg⋅g −1 ) and the adsorption kinetics also surpass most of the reported porous adsorbents.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 33
·50177-50191
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IF 5.19
Wang Meng-lu,Zhao Zhe,Lin Shumin,Su Ming,Liang Bolong,Liang Shu-xuan
The present study aimed to investigate the co-adsorption and application of water stabilized Fe 3 O 4 @ZIF-8 composite with magnetic cubic crystal structure. This new material was successfully prepared by facile modification strategy and rational design, which was used for simultaneous adsorption of oxytetracycline (OTC) and Pb(II) in aqueous solution. The co-adsorption behavior and mechanism of the composite for OTC and Pb(II) were systematically investigated by characterization techniques and batch experiments, and its application potential was effectively evaluated. The results showed that the synthesized Fe 3 O 4 @ZIF-8 composite innovatively retained the cubic crystal structure of ZIF-8 and was successfully loaded on the surface of Fe 3 O 4 particles with small particle size to form a core-shell structure. The Fe 3 O 4 @ZIF-8 composite possessed a large specific surface area (1722 m 2 /g), magnetic separation performance (13.4 emu/g), and rich functional groups. The co-adsorption of OTC and Pb(II) on Fe 3 O 4 @ZIF-8 had fast reaction kinetics (equilibrium within 90 min) and large adsorption capacity (310.29 mg/g and 276.06 mg/g respectively). The adsorption process for both contaminants followed pseudo-second order kinetics and Langmuir isotherm models and had synergistic and competitive effects at the same time. π-π stacking and electrostatic interaction were the main mechanisms of adsorption. Fe 3 O 4 @ZIF-8 had good adsorption performance after cyclic adsorption for 4 times and it performed well in the treatment of real waste water. This study provided a new sight for the control of combined pollution of OTC and Pb(II) and proved Fe 3 O 4 @ZIF-8 composites have great application potentials for complex wastewater treatment.
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
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2023
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IF 3.4
Xue Su,Qiannan You,Linlin Zhuang,Zhimin Chang,Mingfeng Ge,Li Yang,Wen-Fei Dong
Circulating tumor cells (CTCs) are important prognostic markers for cancer diagnosis and metastasis, and their detection is an important means to detect cancer metastasis. Herein, we construct a novel bifunctional electrochemical biosensor based on the PB-MXene composite films. A simple electrostatic self-assembly approach was employed to prepare a film composed of PB nanocubes on the MXene substrates. Given that the PB is an artificial peroxidase for H 2 O 2 sensing, the PB-MXene films can realize the real-time monitoring of H 2 O 2 secretion from living CTCs. Besides, the anti-CEA attached biosensors can be utilized to quantify the corresponding CTCs. The synergic effects of the MXene with a large specific area and PB with enzyme-free catalysis for H 2 O 2 resulted in PB-MXene films exhibiting high electrocatalytic and low cytotoxicity for both H 2 O 2 sensing and living CTCs capturing. As a result, the biosensor shows a low detection limit of 0.57 μM towards H 2 O 2 with a wide linear range (1 μM to 500 μM), as well as an excellent sensing performance for CTCs (an extremely low detection limit of 9 cells/mL in a wide linear range of 1.3 ×10 1 to 1.3 ×10 6 cells/mL). Moreover, the prepared biosensor showed satisfactory stability and anti-interference ability for potential applications in clinical cancer diagnosis and tumor metastasis.
研究领域:
生物医学工程
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癌症诊断
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2023
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IF 4.6
Hui Jiang,Jinqi Chen,Jihong Deng,Xiang Zhao,Leijun Xu
This study provides a reference for rapid determination of heavy metal Pb in soybean oil by microwave detection technique. The microwave transmission coefficients of soybean oil samples with different concentrations of the heavy metal Pb were collected using a portable microwave detector made by our team. Three feature optimization methods, which were bootstrapping soft shrinkage (BOSS), competitive adaptive reweighted sampling (CARS), and variable combination population analysis (VCPA), were employed to select the features of microwave transmission coefficients after least square filtering, and partial least squares (PLS) models constructed on features selected were used to rapid determine the heavy metal Pb content in soybean oil. The results showed that the three variable optimization algorithms can screen out highly targeted features. Especially, the CARS-PLS model obtained the optimal generalization performance, and its coefficient of determination ( R P 2 ) and residual predictive deviation (RPD) were 0.9857 and 8.3838, respectively. The results reveal that it is feasible to use the microwave detection technique combined with appropriate chemometrics methods to determine the heavy metal Pb in soybean oil with high precision. This study provides a practical technique for nondestructive determination of heavy metal residues in edible oil .
研究领域:
食品科学
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化学计量学
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产品关联
DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2019
·Vol. 50
·期 10
·1445-1451
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IF 2.809
Aili Liu,Huile Jin,Jun Li,Liyun Chen,Haoyuan Zheng,Xinnan Mao,Dajie Lin,Jichang Wang,Shun Wang,Weizhong Jiang
A microwave- and ultrasound-assisted reduction and assembly of lead dimethyldithiocarbamate (Pb (DMDC) 2 ) led to the formation of rod-like Pb (DMDC) 2 embedded with PbS quantum dots (QDs). Transmission electron microscopy measurements show the presence of numerous isolated PbS QDs on the Pb (DMDC) 2 microrod surface, which may potentially act as hot spots for enhanced Raman spectroscopy. A case study using mercaptopyridine as the analyte demonstrates that the rod-like hybrids have outstanding performance as a surface-enhanced Raman scattering (SERS) substrate, comparable with that of Au nanorods. The excellent SERS performance of the as-fabricated PbS QDs/Pb (DMDC) 2 hybrids may be attributed to the unique dispersion of PbS QDs as well as the intimate contacts between PbS QDs and Pb (DMDC) 2 . This study therefore presents a new approach for the development of low-cost and highly efficient semiconductor-based SERS substrates.
研究领域:
材料科学
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光谱学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Xianyang Li,Jiakang Qu,Zhuqing Zhao,Yan Zhao,Hongwei Xie,Huayi Yin
A green, straightforward and inexpensive sulfide metallurgy approach is of great importance to reduce the Sulfur oxides gas emissions caused by the conventional extraction methods. Herein, liquid antimonial lead alloy (Sb 3 Pb 7 ) can be directly extracted from the mixture of antimony sulfide and lead sulfide (Sb 2 S 3 –PbS) at the cathode in eutectic sodium chloride-potassium chloride (NaCl–KCl) melt at 730 °C, and sulfur gas evolves at the graphite inert anode . The reduction mechanism of Sb 2 S 3 –PbS involves two stages: the insertion of sodium ion (Na + ) into liquid sulfides and then the removal of divalent sulfide ion (S 2− ) to generate uniform Sb–Pb alloy. The electrolytically generated Sb–Pb alloy as the positive electrode for Li||Sb–Pb liquid metal battery (LMB) can be nearly fully discharged to x Li = 0.45 (lithium mole fraction , Li/(Li + SbPb)) at 50 mA cm −2 and 500 °C. During the discharge process, Li 2 Sb and Li 3 Sb formed as the intermetallic layer because of the high melting point and low solubility of the intermetallic in the liquid Pb. The present study provides an environmentally benign way to electrochemically convert sulfide minerals to value-added Sb–Pb alloys not only for the large-scale energy-storage system but also for metal production.
研究领域:
冶金学
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电化学
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储能技术
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DOI
高影响因子
Materials Today Physics
·
2023
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IF 11.5
Xiaolong Liang,Rui Xu,Mengruizhe Kong,Han Wan,Wei Bai,Deming Dong,Qizhu Li,Huihong Xu,Zhou Li,Binghui Ge,Jiming Song,Chong Xiao
Owing to the unavoidable electron scattering , introducing phonon-scattering defects to suppress the phonon diffusion in thermoelectric materials will always deteriorate the carrier transport. Therefore, exploring new methods to counterpoise the contradiction between carrier transport and phonon scattering is urgently needed. Herein, present work highlights that Pb/In codoping on BiCuSeO can suppress the phonon propagation while preserving the carrier transport, which alleviates the contradiction between carrier mobility (μ) and lattice thermal conductivity (κ l ), and improves the thermoelectric performance in Pb/In-codoped BiCuSeO. Multi-scale phonon-scattering centers, such as point defects , dislocations, In 2 O 3 /Cu 2 Se nano-precipitates and phase/grain boundaries, were introduced to promote full-wavelength phonon scattering, which brought about much reduced κ l and substantially low total thermal conductivity, and a minimum κ l of 0.30 W m −1 K −1 was achieved in Bi 0·91 Pb 0·06 In 0·03 CuSeO at 873 K. More importantly, Pb/In codoping can compensate the increased density of state effective masses caused by Pb single-doping, which resulted in improved μ and the obvious increased μ/κ l . In addition, the improved μ also led to considerably increased electrical conductivity and power factor. Finally, the maximum ZT of 1.23 at 873 K and a high ZT avg of 0.72 between 300 and 873 K are achieved in Bi 0·93 Pb 0·06 In 0·01 CuSeO, which is superior to both the pristine and Pb-single-doped counterparts. Our findings elucidate the importance of balancing the carrier transport and phonon scattering during defect modulation of the thermoelectric performance.
研究领域:
材料科学
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热电材料
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物理学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）