ANALYTICAL LETTERS
·
2025
·
IF 1.8
Kong Weiheng,Zhu Haitao,Cheng Xingwang,Wang Yu,Song Wei,Zhou Dianbing,Fu Yan,Yu Xiaofeng,Wu Qiong,Han Fang
A functionalized Zr-based metal–organic framework (MOF) was synthesized using UiO-66 as the framework, polydiallyldimethylammonium (PDDA) as the interfacial modifier, and polydopamine (PDA) as the functionalizing agent through a straightforward one-pot hydrothermal reaction. The material underwent characterization through X-ray diffraction to determine its crystal structure, scanning electron microscopy and transmission electron microscopy to analyze its surface morphology and microstructure, and X-ray photoelectron spectroscopy to evaluate its elemental oxidation states. These analyses revealed that UiO-66-PDDA-PDA displayed well-dispersed PDA and an abundance of functionalized hydroxyl and amino groups. Utilizing this innovative functionalized MOF material, an electrochemical sensor was developed based on a UiO-66-PDDA-PDA-modified glassy carbon electrode for the simultaneous determination of Cd2+, Cu2+, Pb2+, and Hg2+. The fabricated electrochemical sensor exhibited excellent selectivity and rapid response to microgram levels of the mentioned heavy metal ions in tea, water, and dairy products using cyclic voltammetry. The sensor demonstrated remarkably low detection limits and stable relative standard deviations (RSDs) for the four heavy-metal ions. Furthermore, the electrochemical properties and applications of the modified electrode were investigated by optimizing operational parameters such as pH, deposition potential, and deposition time to improve the detection of trace ions. This approach offers a rapid screening method for inspectors to verify sample compliance.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Danyang Dou,Bingjie Cai,Bingbing Zhang,Ying Wang
Nonlinear optical (NLO) crystals are very important for laser technology, but the performances of available NLO crystals are still insufficient for increasing demand. Recently, the exploration of new NLO crystals in non-π-conjugated systems with the heteroatomic tetrahedra is attracting a lot of interest. In this work, we systematically explore the metal sulfamates containing [NH2SO3] groups and four metal sulfamates, namely, Ca(NH2SO3)2·4H2O, Ca(NH2SO3)2·H2O, Pb(NH2SO3)2·H2O, and Pb(NH2SO3)2 were synthesized by aqueous solution and hydrothermal methods. Notably, these metal sulfamates exhibit different crystal structures and optical properties owing to the diverse arrangement of the functional groups in their structures. In addition, due to hydrogen bond regulation, the centrosymmetric (CS) compound Ca(NH2SO3)2·4H2O can transform into noncentrosymmetric (NCS) Ca(NH2SO3)2·H2O, leading to NLO activity. Experimental characterizations and theoretical analysis reveal that these metal sulfamates are ultraviolet transparent and suitable for developing new NLO materials.
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Yihuan Song,Feng Guo,Pingxiu Zeng,Jinhua Liu,Yuanchao Wang,Heyong Cheng
Toxicity, mobility, bioavailability and biofunctions of chromium, cadmium, mercury and lead are heavily dependent upon their specific chemical forms, leading to a high demand to metal speciation analysis rather than total quantification. Simultaneous speciation analysis of multiple metal(loid)s is attractive to a large sample capacity containing unstable analytes due to its economic and environmental advantages over the conventional single elemental strategies. In this work, an analytical method integrating online solid phase extraction into high performance liquid chromatography interfaced with inductively coupled plasma mass spectrometry (ICP-MS) to simultaneously preconcentrate and quantify Cr, Cd, Hg and Pb forms in pg L −1 levels in water was developed. Cr(III + VI), Cd(II), Hg(II), Pb(II), methylmercury (MeHg), ethylmercury (EtHg), and trimethyl (TML) and triethyl lead (TEL) were captured by the C 18 adsorbent (equilibrated with 10 mL of 1.0 mM 2-hydroxyethanethiol at 10 mL min −1 ) and eluted by mobile phase (5.0 mM Cys at pH 2.0), then completely separated on the C 18 column within 8.0 min and eventually determined by ICP-MS. Low limits of detection (0.001–0.007 ng L −1 ) and quantification (0.003–0.023 ng L −1 ), good relative standard deviations (<4%) and high enrichment factors (827–2656 folds) were obtained with good linearities. Three reference materials of total cadmium (GBW08602), total mercury (GBW08603) and total lead (GBW08601) in water were analyzed by the developed method to validate the accuracy with good agreement with certified values and satisfactory recoveries (92–100%). This method was proved feasible by the determination of Cr, Cd, Hg and Pb compounds in drinking water , river water, pond water and tap water .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
·
IF 7.129
Qiuling Yin,Peng Lyu,Guanghui Wang,Bing Wang,Yingjie Li,Zhongkui Zhou,Yadan Guo,Lianfang Li,Nansheng Deng
The decommissioning of uranium tailings (UMT) is usually accompanied by uranium (U) contamination in soil, which poses a serious threat to human health and ecological security. Therefore, the remediation of uranium pollution in soil is imminent from ecological and environmental points of view. In recent years, the use of biochar stabilizers to repair uranium tailings (UMT) soil has become a research hotspot. In this study, a novel phosphorus-modified bamboo biochar (PBC) cross-linked Mg–Al layered double-hydroxide composite (PBC@LDH) was prepared. The hyperaccumulator plant Indian mustard ( Brassica juncea L.) was selected as the test plant for outdoor pot experiments, and the stabilizers were added to the UMT soil at the dosage ratio of 15 g kg −1 , which verified the bioconcentrate and translocate of U and associated heavy metal Pb in the UMT soil by Indian mustard after stabilizer remediated. The results shown that, after 50 days of growth, compared with the untreated sample (CK), the Indian mustard in PBC@LDH treatment possessed a better growth and its biomass weight of whole plant was increased by 52.7%. Meanwhile, the bioconcentration factors (BF) of U and Pb for PBC@LDH treatment were significantly decreased by 73.4% and 34.2%, respectively; and the translocation factors (TF) were also commendable reduced by 15.1% and 2.4%, respectively. Furthermore, the Tessier available forms of U and Pb in rhizosphere soil showed a remarkably decrease compared with CK, which reached by 55.97% and 14.1% after PBC@LDH stabilization, respectively. Complexation, precipitation, and reduction of functional groups released by PBC@LDH with U and Pb described the immobilization mechanisms of biochar stabilizer preventing U and Pb enrichment in Indian mustard. As well as, the formation of U-containing vesicles was prevented by the precipitation of −OH functional groups with free U and Pb ions around the cell tissue fluids and vascular bundle structure of plant roots, thereby reducing the migration risk of toxic heavy metals to above-ground parts. In conclusion, this research demonstrates that the PBC@LDH stabilizer offers a potentially effective amendment for the remediation of U contaminated soil.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yinghao Xue,Wei Teng,Yanyan Chen,Qian Ma,Xiaoqian Chen,Yu Sun,Jianwei Fan,Yuping Qiu,Rongbing Fu
Simultaneous removal of cation (e.g., Pb(Ⅱ), Cd(Ⅱ)) and oxyanion (e.g., As(Ⅴ)) heavy metals have attracted increasing interest for adsorption applications due to the complexity of heavy metal polluted groundwater. Manganese-lanthanum binary oxides immobilized on hydrothermal carbonization carbon (Mn x La 1-x @HTCC) were therefore rationally designed in this work, and the Mn-La oxides immobilized on HTCC exhibited more uniform dispersion compared to bulk phase. In single adsorption systems, superior adsorption of different heavy metals could be achieved by tuning the molar ratio of Mn to La, and Mn leaching was reduced by ∼ 75% compared with Mn@HTCC (without La doping). In the coexisting systems, the simultaneous presence of As(Ⅴ) and Pb(Ⅱ) greatly enhanced adsorption of both two heavy metals, while competition was observed in the coexistence of As(Ⅴ) and Cd(Ⅱ). By analyzing the “release-readsorption” phenomenon of Mn and the variation of Mn valence during adsorption, the different roles of Mn species in the removal of three heavy metals were proposed. Finally, high-speed flow adsorption column experiments confirmed that the Mn x La 1-x @HTCC composite can effectively and continuously adsorb heavy metals accompanied by trace Mn leaching content. Overall, this study indicates the potential of Mn-La carbon composites as a novel adsorbent in groundwater remediation.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Ming Sui,Yanni Huang,Yang Tang,Jiaoyang Luo,Yiyang Dong,Yifei Guo,Yonggui Ma,Wei Gu,Mengyue Guo,Jingdan Huang,Dandan Kong,Jinping Li,Meihua Yang
Medicinal teas (MT) were popular in Asian countries for its various effective components. However, Pb pollution poses a serious threat to MT consumption due to the irreversible effect on enzyme activity and neurodegenerative disease. Owing to its toxicity and matrix interference, a rapid screening method for Pb at trace level with high sensitivity and accuracy is urgent for MT consumers. Herein, a simple and ultra-sensitive AuNPs/MWCNTs-MB/DNA-GCE quadruplex biosensor was developed and investigated. Specifically, the monitoring technology of scanning electrochemical microscope was utilized to analyze the assembly and application process for screening key parameters in complex matrix , through in-situ characterization of the microstructure changes on stepwise modified sensors. According to the combined results of electrochemical test and Randles-Sevcik equation, the proposed sensor showed a wide linear range from 5.0 * 10 −15 to 5.0 * 10 −13 M with LOD of 0.9 fM. In addition, the optimized sensor exhibited an excellent selectivity under the inference of metals and medicinal components. The proposed biosensor was successfully implemented for the ultrasensitive monitoring Pb pollution in MT while its water infusions recoveries maintained within acceptable range (81–118 %, 82–129 %). In all, AuNPs/MWCNTs-MB/DNA-GCE provided a new insight into the design, optimization, application and mechanism analysis of sensor for reliable sensing in controlling MT pollution and consumption safety.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 12
·4731-4740
·
IF 4.58
Lu Zhiwei,Zhang Junjun,Dai Wanlin,Lin Xueni,Ye Jiaping,Ye Jianshan
The authors report on a disposable sensor for the differential pulse anodic stripping voltammetric (DPASV) determination of the ions Zn(II), Pb(II) and Cu(II). Simultaneous detection is accomplished by using a screen-printed carbon electrode (SPCE) co-modified with an in-situ plated bismuth (Bi)) film and gold nanoparticles (AuNPs). The synergistic effect of the Bi film, and the large surface and good electrical conductivity of the AuNPs strongly assist in the co-deposition of the three ions. Four well-defined and fully separated anodic stripping peaks, at 540 mV for Zn(II), 50 mV for Pb(II), 140 mV for Bi(III) and 295 mV for Cu(II), all vs. Ag/AgCl, can be seen. The modified SPCE was characterized by scanning electron microscopy, X-ray diffraction, cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimized conditions, the sensor has a good response to these ions. The detection limits (at an S/N ratio of 3) are 50 ng·L −1 for Zn(II), 20 ng·L −1 for Pb(II), and 30 ng·L −1 for Cu(II). The method was applied to the determination of the 3 ions in spiked lake water samples.
Schematic of screen-printed carbon electrode (SPCE) co-modified with a bismuth film and gold nanoparticles for electrochemical simultaneous determination of Zn(II), Pb(II) and Cu(II) by differential pulse anodic stripping voltammetric (DPASV).
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 94
·77159-77167
·
IF 3.84
Lili Xiao,Shenghai Zhou,Guangzhi Hu,Hongbo Xu,Yi Wang,Qunhui Yuan
A novel nanoporous carbon material (NPC) was prepared by simple pyrolysis of an isoreticular metal–organic framework-8 (IRMOF-8) at 1000 °C. The obtained NPC possessed a three-dimensional hierarchy of micro-, meso-, and macropores, a high surface area of 1715 m2 g−1 and a large pore volume of 1.70 cm3 g−1. By using Nafion and bismuth films as co-modifiers, the obtained NPC was further used for the fabrication of a sensitive NPC–Nafion/bismuth composite modified glassy carbon electrode (NPC–Nafion/Bi/GCE) for electrochemical determination of Pb(II) in aqueous solution. The synergistic effect of the Nafion and Bi films, as well as the high activated surface area, hierarchical porous texture, and good electrical conductivity of the NPC contributed to the enhanced electrochemical response of Pb(II) at the NPC–Nafion/Bi/GCE during differential pulse anodic stripping voltammetry. Under the optimum conditions, the fabricated electrode exhibited two linear ranges varying from 1–7 μg L−1 and 7–70 μg L−1, respectively. The detection limit was estimated to be 0.8 μg L−1 (at a signal-to-noise ratio of 3) for Pb(II), which was about 12 times lower than the guideline value set by the World Health Organization (WHO) for drinking water. The NPC–Nafion/Bi/GCE showed high reproducibility, with relative standard deviations of 6.2% and 3.4% for multiple successive measurements of 10 and 50 μg L−1 Pb(II), respectively. The composite electrode was successfully used in the analyses of Pb(II) in tap-water samples, and good recoveries were obtained for various spiked values.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Liting Zhang,Mingjun Qiao,Haoyu Zheng,Tony Vancov,Vasileios Antoniadis,Sabry M. Shaheen,Stephen Joseph,Chao Chen,Shengdao Shan,Hanbo Chen,Hailong Wang
Herein, a series of novel carboxymethyl cellulose (CMC)/pectin-based hydrogel beads were synthesized with chitosan as a cross-linker. The hydrogel composites were denoted as CPC-1/2/3/4/5, with varying mass ratios of CMC, pectin, and chitosan (6:0:1, 5:1:1, 4:2:1, 3:3:1, and 2:4:1). This is a pioneering study that investigates the synergistic effects of these biopolymers in a single hydrogel system for the adsorption of heavy metals, specifically Cd 2+ , Pb 2+ , and Cu 2+ . CPC-4 was identified as the optimal adsorbent, and its adsorption behavior, efficiency, and mechanisms were systematically explored. The adsorption kinetics of CPC-4 for Cd 2+ , Pb 2+ , and Cu 2+ adhered to the pseudo-second-order model, while equilibrium adsorption isotherms were best described by the Langmuir model. Notably, CPC-4 achieved maximum adsorption capacities for Cd 2+ , Pb 2+ , and Cu 2+ of 139.4, 270.3, and 143.6 mg/g, respectively. Spectroscopic analyses including FTIR and XPS revealed abundant oxygen- and nitrogen-bearing functional groups (carboxyl, hydroxyl, and amine) in CPC-4, which facilitated metal ion binding through complexation reactions. Density functional theory calculations demonstrated that the incorporation of chitosan significantly enhanced the interaction between CMC and pectin, identifying the coupled regions as the most favorable sites for metal adsorption, with adsorption energies of −4.03 eV for Cd, −4.59 eV for Pb, and −5.59 eV for Cu. The superior adsorption performance of CPC-4 is primarily attributed to complexation and hydrogen bonding at the cross-linked sites. In summary, this study highlights the potential of this biopolymer-based hydrogel composite as a promising new adsorbent for the effective management of heavy metal contamination in aquatic environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Haixin Xia,Yaohong Zhang,Qian Chen,Renrong Liu,Hai Wang
Two functionalized biochar composites (ZF@CBC and SZF@CBC) were fabricated and applied for capturing Pb(II) and Cd(II) from wastewater. SZF@CBC were achieved by loading Zn/Fe nanoparticles (NPs) and coating starch onto corn cobs biochar (CBC) surface, while ZF@CBC was realized by loading Zn/Fe NPs onto CBC surface. The characterization analysis (SEM-EDS, XRD and FTIR) revealed that Zn/Fe NPs and starch were successfully introduced onto CBC surface. The adsorption data of Pb(II) and Cd(II) by ZF@CBC and SZF@CBC conformed to the model of pseudo second order kinetic and Langmuir isothermal and the capture Pb(II) and Cd(II) was a chemisorption process. The maximum sorption capacities of SZF@CBC for Pb(II) and Cd(II) reached 199.98 mg/g and 183.93 mg/g, which were 3.37 and 3.84 times high as that of CBC, respectively. Due to the presence of plentiful exposed adsorption sites (–OH, –COOH, Zn-O and Fe-O) on SZF@CBC surface, which endowed it to accelerate Pb(II) and Cd(II) adsorption. In addition, complexation, electrostatic attraction, ion exchange and physical adsorption took part in the adsorption process. Besides, SZF@CBC still exhibited very good removal capacity for Pb(II) and Cd(II) even in the coexistence of multiple interfering ions and maintained stable adsorption capacity after five consecutive cycles. Therefore, SZF@CBC could be used as an excellent adsorbent for decontaminating Pb(II) and Cd(II) from wastewater with multiple pollutants, and also could be used in resource utilization of biomass waste, which possessed potential applications prospects.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 33
·50177-50191
·
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.
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Mu Li,Jingwen Luo,Jianjiang Lu,Wentao Shang,Jiale Mu,Feiyun Sun,Zijun Dong,Xiaoyan Li
A novel Polyacrylonitrile (PAN) composite membrane involving ZIF-8 nanoparticles , named as ZIF-8/PAN membrane, was obtained via electrospinning to remove the Congo red (CR), Pb(II) and Cu(II) ions in industrial wastewaters , during which the adsorption mechanisms were examined in this study. The adsorption efficiency of the electrospun ZIF-8/PAN membrane was as high as 89%, 92% and 76% for CR, Pb(II) and Cu(II), respectively. Comparative analysis showed that ZIF-8 nanoparticles embedded in the ZIF-8/PAN membrane accounted for these enhanced adsorption capabilities. The adsorption behaviors of the ZIF-8 nanoparticles were investigated through experiments and theoretical analysis, and the results unraveled that the adsorption for CR by the ZIF-8 was mainly including electrostatic interaction, hydrogen bonding and π − π interaction, while those for Pb(II) and Cu(II) were mainly caused by ion-exchange and chemical adsorption. Parametric studies were conducted to optimize the conditions for removing CR, Pb(II), and Cu(II) by ZIF-8 nanoparticles, during which all of pollutants showed different reactions to the solution pH. This work not only develops a novel ZIF-8/PAN composite membrane for effective removals of pollutants, but also reveals the underlying mechanisms of pollutants adsorption in terms of molecular interactions, providing important understandings on fibrous materials design for efficient heavy metals and dyes removals in industrial wastewater treatment .
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）