REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Liangyun Yu,Xue Chen,Liangju Sun,Qi Zhang,Bairen Yang,Mingquan Huang,Baocai Xu,Qin Xu
It's very exciting to develop an electrochemical sensor for simple, rapid and simultaneous determination of heavy metal ions in Baijiu by applying new nanocomposites. Herein, a novel COF DPTB @gold nanoparticles (AuNPs)@graphene (GR) was obtained via combining COF DPTB synthesized using the Schiff-base condensation between 2, 5-dimethoxyterephthalaldehyde and 1, 3, 5-tris(4-aminophenyl) benzene with AuNPs and GR. Owing to the high porosity and abundant adsorption sites of COF DPTB , the outstanding electrical conductivity of AuNPs and GR, as well as the high specific area and synergy of COF DPTB , AuNPs and GR, the proposed sensor exhibited excellent analysis performance for the detection of Cd 2+ , Pb 2+ and Cu 2+ . Under optimized conditions, the sensor showed good linearity range of 0.5–18 μM for Cd 2+ , and both 0.5–6.0 μM for Pb 2+ and Cu 2+ with the detection limits of 3.025 nM, 5.849 nM and 9.993 nM, respectively. In addition, the recovery measurement suggested the practicality of the prepared sensor.
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DOI
高影响因子
Journal of Cleaner Production
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2023
·
IF 11.1
Wei Li,Yue-Lei Hao,Wei-Liang Jin,Jing-Qi Liu,An-Na Tang,Li-Na Zhu,Hong-Xin Jiang,De-Ming Kong
The assessment and treatment of heavy metal pollution are eternal subjects of environmental protection. Facile on-site assessment of heavy metal pollution and efficient, rapid removal of pollutes are still challenging. Covalent organic frameworks (COFs) hold great promise as absorbents for heavy metal pollution treatment. To overcome the application limits of COF powders, a COF-based monolithic composite is prepared by direct in-situ growth of an N/O-rich COF on the surface of a melamine foam (MF). The resultant MF@COF inherits the macro-porous channels of MF, the good crystallinity of COF, and integrates the attractive features of monolithic materials such as ease of operation, facile and highly efficient recovery, and good reusability . The abundant N/O groups endow MF@COF with powerful capture capability towards various heavy metal ions . Its maximum adsorption capacity for Cd 2+ is 278.45 mg/g, and the adsorption equilibrium can be reached within 1–3 s. The adsorption kinetic of Cd 2+ by MF@COF follows the pseudo-second-order kinetic model , and the adsorption isotherm conforms to Freundlich model. Rapid adsorption, together with the easy-to-operate feature of monolithic material, make the ultrafast water purification possible. Meanwhile, MF@COF works well for the highly efficient enrichment of Cd 2+ to realize the naked-eye detection of Cd 2+ pollution at low levels, thus may be developed as an important tool for both on-site assessment and rapid treatment of heavy metal pollution.
研究领域:
环境科学
·
材料科学
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高影响因子
Processes
·
2022
·Vol. 10
·期 4
·618
·
IF 3.352
Qing Guo,Hongmei Tang,Lu Jiang,Meiqing Chen,Nengwu Zhu,Pingxiao Wu
In this study, bone char pretreated with hydrogen peroxide and traditional pyrolysis was applied to remove Cd2+from aqueous solutions. After hydrogen peroxide pretreatment, the organic matter content of the bone char significantly decreased, while the surface area, the negative charge and the number of oxygen-containing functional groups on the bone char surface increased. After being pyrolyzed, the specific surface area and the negative charge of the material were further improved. The adsorption kinetics and isotherms of Cd2+adsorption were studied, and the influence of solution pH and the presence of ionic species were investigated. The experimental results showed that the samples with lower crystallinity exhibited less organic matter content and more surface oxygen-containing functional groups, resulting in stronger adsorption capacity. After being treated with hydrogen peroxide and pyrolyzed at 300 °C, the maximum adsorption capacity of bone char was 228.73 mg/g. The bone char sample with the lowest adsorption capacity(47.71 mg/g) was pyrolyzed at 900 °C without hydrogen peroxide pretreatment. Ion exchange, surface complexation, and electrostatic interactions were responsible for the elimination of Cd2+by the bone char samples. Overall, this work indicates that hydrogen peroxide-treated pyrolytic bone char is a promising material for the immobilization of Cd2+.
研究领域:
环境科学
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材料科学
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
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IF 4.1
Tallat Munir,Jiawei Zhou,Ming Liu,Shiyang Bai,Jihong Sun
A highly effective synthetic clinoptilolite (SCP) was developed and assessed for its potential in the simultaneous removal of Cd 2+ , Ni 2+ , Mn 2+ , Sr 2+ , and Fe 3+ from an aqueous solution. The present work explored the influences of SCP dosage, initial metal ion concentrations, temperature, contact time, and pH value on the adsorption performances of these metal ions. The results revealed exceptionally high adsorption capacities, reaching 2000, 1720, 1875, 1510, and 22 mg/g for Ni 2+ , Fe 3+ , Cd 2+ , Mn 2+ , and Sr 2+ , respectively. The specific surface area of SCP increased from 31.4 to 44.7 m 2 /g after five cycles. The adsorption mechanism and structure assessment were elucidated by XRD patterns and SEM images, showing that the Fe 3+ adsorption conformed to the Langmuir isotherm, while that of Mn 2+ , Cd 2+ , Sr 2+ , and Ni 2+ followed the Freundlich isotherm model with the adsorption kinetics best described by the pseudo-2nd-order kinetic model. Thermodynamic parameters showed endothermic behavior for Cd 2+ , Ni 2+ , Mn 2+ , and Sr 2+ , exothermic for Fe 3+ , and spontaneity for all metals except Sr 2+ . SCP retained over 90 % of its adsorption capacity after five regeneration cycles, maintaining structural integrity under thermal, acidic, and recycling conditions. These findings highlight SCP’s robust characteristics, reusability, and potential for sustainable heavy metal removal from 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
Separations
·
2026
·Vol. 13
·期 7
·198
·
IF 3.5
Haicheng Zhao,Lihui Gao,Xinmeng Jiang,Yijing Zhang
Coal gasification slag (CGS), a massive industrial solid waste, possesses inherent adsorptive potential that remains underutilized due to pore blockage by amorphous siliceous phases. Conventional modification strategies typically rely on energy-intensive high-temperature processes. Herein, we report a facile, low-temperature alkaline activation approach to transform CGS into a high-efficiency adsorbent (denoted NCGS) for Cd2+removal. Sodium hydroxide (NaOH) solution was employed under mild conditions (90 °C) to selectively etch siliceous species, thereby generating a porous architecture and enriching surface oxygen-containing functionalities. Orthogonal experimental design identified optimal synthesis parameters (1 mol/L NaOH, solid–liquid ratio of 1:30 g/mL, 12 h), yielding NCGS with significantly enhanced textural properties. The adsorption isotherm was well described by the Langmuir model, with a maximum capacity of 87.06 mg/g at pH 6.0, while kinetic studies indicated the adsorption process could be described by pseudo-second-order kinetic model. Comprehensive characterization via SEM-EDS, FTIR, and XPS elucidated a multi-mechanistic adsorption pathway mainly involving ion exchange (Na+/Cd2+) and coordination complexation. Life cycle assessment analysis revealed that NCGS production generates 11.23 kg CO2eq emissions, with transportation accounting for 88%. This study presents an energy-saving and environmentally friendly strategy to unlock the adsorptive potential of CGS, providing a highly promising waste-based adsorption material for the remediation of Cd2+-contaminated water.
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高影响因子
Food Bioscience
·
2025
·
IF 5.9
Linyuan Zhai,Xinyi Feng,Huali Jin,Tian Bai,Min Wei,Yong Liu,Zhiguang Suo
Cadmium ions (Cd 2+ ) as a class of widespread pollutants, can cause Irreversible damage to population health and habitat quality with small amounts of Cd 2+ . an electrochemical sensor for Cd 2+ detection was developed based on AuPt NPs@ZnNi-MOF bimetallic nanocomposites combined with hyperbranched hybridization chain reaction (HCR) signal amplification strategies. The sensor employed AuPt NPs@ZnNi-MOF as the electrode modification material, which promoted the electron transport on the electrode surface and significantly increased the current signal by 49.16 %, as well as provided a large number of active sites for the sensor. 3D DNA walker was initiated in the presence of the target, generating many DNA single strands that triggered catalytic hairpin self-assembly (CHA) at the electrode. The production of intermediate strand output is induced, which leads to the construction of hyperbranched HCR. Hyperbranched HCR amplification demonstrated high efficiency, producing numerous long double-stranded chains and creating abundant embedding sites for electroactive molecules. These signal amplification strategies led to a remarkable 2.52-fold enhancement in the current signal. Under the optimal experimental conditions, the detection range of the sensor was 0.001–500 nmol/L, and the limit of detection (LOD) was 0.221 pmol/L. Furthermore, the sensor exhibits excellent specificity, reproducibility, and stability, and has been successfully applied for the detection of Cd 2+ in tap water and tea, as well as achieving satisfactory results in the analysis of quality control samples such as rice flour and pork liver powder.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 8
·087505
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IF 3.721
Xiaolei Zhu,Bingchuan Liu,Sijing Chen,Longsheng Wu,Jiakuan Yang,Sha Liang,Keke Xiao,Jingping Hu,Huijie Hou
A green and effective strategy to prepare a novel lotus root-like three-dimensional (3D) bismuth/biomass derived activated carbon (Bi@BAC) composite was developed for simultaneous electrochemical sensing of Pb2+ and Cd2+. The BAC supports herein were prepared from naturally-abundant Platanus seeds chemically activation by KOH, with dense and uniform bismuth micro/nano-sized particles successfully anchored on the carbon substrate through microwave-assisted hydrothermal treatment and subsequent carbothermal reduction process. Simultaneous electrochemical detection of Pb2+ and Cd2+ using square wave anodic stripping voltammetry (SWASV) was performed with the novel composite modified carbon paste electrode (CPE). Under optimized experimental conditions, the Bi@BAC/CPE demonstrated good linear response for both two target metal ions in the concentration range of 0.5 to 50 μg L−1, with limits of detection (LOD, S/N = 3) of 0.13 and 0.08 μg L−1 for Pb2+ and Cd2+, respectively. Moreover, the modified electrode displayed high resistance to interference, long-term stability and good reproducibility. The Bi@BAC/CPE also demonstrated satisfactory recovery level for the detection of target metal ions in real water samples.
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
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Dongfang Wang,Yingchang Ke,Di Guo,Hongxu Guo,Jianhua Chen,Wen Weng
A metal-organic frameworks (MOFs), cauliflower-like MIL-100(Cr), has been facilely prepared through simple reflux method for the first time and characterized by XRD, FT-IR, SEM and XPS. The MOFs was found to be useful for the simultaneous and selective electrochemical detection of microgram Cd(II), Pb(II), Cu(II), and Hg(II) in aqueous solution. The detection was performed by the square wave anodic stripping voltammetry (SWASV). The MIL-100(Cr) modified electrode showed an excellent selectivity and stability for Cd 2+ , Pb 2+ , Cu 2+ , Hg 2+ determinations. The electrochemical properties and applications of the modified electrode were studied. Operational parameters such as pH, deposition potential and deposition time were optimized for the purpose of determination of traces of metal ions .
研究领域:
材料科学
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分析化学
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DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2014
·Vol. 2014
·期 20
·3172-3177
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IF 2.965
Zhiming Chen,Zhirong Geng,Zhiyang Zhang,Lianbing Ren,Tingxian Tao,Renchun Yang,Zuxiang Guo
Graphical Core–shell magnetic Fe 3 O 4 @C nanoparticles are functionalized with sulfonic and carboxylic acid groups and employed to capture heavy metal ions in aqueous media. The magnetic Fe 3 O 4 @C nanoparticles can be easily separated with an external magnet and possess rapid removal kinetics, high adsorption capacities, and removal efficiencies for Pb 2+ , Hg 2+ , and Cd 2+ ions from aqueous solution. Core–shell magnetic Fe 3 O 4 @C nanoparticles functionalized with sulfonic and carboxylic acid groups were synthesized and employed to capture heavy metal ions in aqueous media. The Fe 3 O 4 cores possess unique magnetic properties for adsorbent separation, and the –SO 3 H and –COOH groups attached to the surface of the carbon shells determine the efficiency of heavy metal ion removal. Batch adsorption experiments showed that Pb 2+ , Hg 2+ , and Cd 2+ ions can be completely and quickly removed by the Fe 3 O 4 @C nanoparticles. The equilibrium was established within 5 min, and the maximum adsorption capacities of the Fe 3 O 4 @C nanoparticles toward Pb 2+ , Hg 2+ , and Cd 2+ ions were 90.7, 83.1, and 39.7 mg/g, respectively. The removal efficiencies were 96.3, 98.1, and 93.8 % for Pb 2+ , Hg 2+ , and Cd 2+ ions, respectively. This work provides a facile and general approach to synthesize magnetic functional nanocomposites for 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
BIOSENSORS & BIOELECTRONICS
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2026
·
IF 10.5
Haozi Lu,Wei Zhou,Ye Li,Meiqing Yang,Jifei Yang,Can Hu,Yabo Ogunduyile,Travis Hu,Gang Yu,Huimin Li,Ming Zhang,Song Liu
In the field of non-invasive detection methods, sweat analysis has been increasingly capturing the interest of researchers due to its potential for clinical and health monitoring applications. While the detection of various substances in sweat has been extensively documented, the detection of heavy metal ions such as cadmium (Cd 2+ ) and lead (Pb 2+ ) is challenging due to their low concentrations, often falling below 100 ppb. Sweat testing also faces challenges such as variability in sweat production and evaporation rates, biological fouling, and sensor sensitivity decay, which significantly affect the accurate measurement of biomarker levels in sweat. Traditionally, machine learning in the biosensing domain is often employed for final data analysis and fitting, but its application in optimizing experimental conditions is less common. In this study, we developed a sensing platform based on Ti 3 C 2 T x /Bi 2 Se 3 nanoflower-modified screen-printed carbon electrodes (SPCE) for the detection of Cd 2+ and Pb 2+ in simulated sweat. The sensor demonstrates a broad detection range and relatively low limits of detection (LOD), with a linear detection range of 10-150 ppb and an LOD of 2.88 ppb for Cd 2+ , and a linear detection range of 5-150 ppb and an LOD of 3.45 ppb for Pb 2+ . In addition, an LSBoost–NGO machine-learning framework was employed to model the dependence of the stripping current on key experimental variables and to identify operating conditions that maximize analytical performance. These results demonstrate the potential of Ti 3 C 2 T x /Bi 2 Se 3 /SPCEs combined with machine-learning-guided optimization for sweat-based monitoring of trace heavy metal ion..
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2016
·
IF 1.86
Nai-Di Tan,Jian-Hang Yin,Guang Pu,Yaqing Yuan,Lei Meng,Na Xu
A novel polyethylenimine (PEI)-salicylaldehyde (SA) fluorescence probe, simply prepared by stirring procedure, can sensitively detect Zn 2+ (25 nM) and Cd 2+ (10 nM) in aqueous solution. Formation of metal-to-ligand complexes (Zn 2+ @PEI-SA and Cd 2+ @PEI-SA) between ions and Schiff base generate a new emission at 454 nm, which increase with the concentration of the ions (turn-on). Furthermore, after adding S 2− into the complexes, we can distinguish them due to the fluorescence quenching for Cd 2+ @PEI-SA (turn-off). Both response times for turning on and off the fluorescence are less than 1 min.
研究领域:
分析化学
·
环境科学
·
材料科学
·
荧光传感
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123147
·
IF 7.5
Jiaxin Gao,Xu Xu
This study demonstrates a facile one-step carbonization route for converting loofah sponge into magnetic porous nitrogen-doped biochar (FeN@BC-KOH) for the removal of Pb 2+ , Cd 2+ , and Cu 2+ from aqueous solutions. The proposed method integrates KOH activation, nitrogen doping and Fe-based magnetization in a single step, thereby simplifying the preparation procedure relative to conventional multi-step modification strategies. Systematic characterizations confirm the formation of mesoporous structure with high specific surface area, along with abundant oxygen/nitrogen functional groups and Fe-N x active sites. The synergistic contribution of porous structure, nitrogen-containing moieties and magnetic confers the biochar with enhanced adsorption capacity and facile magnetic separation performance. Adsorption conditions were optimized using Box-Behnken Design (BBD). Kinetic investigations demonstrated that the adsorption process adhered to a pseudo-second-order model (R²>0.9688). Meanwhile, the isotherm data were most appropriately characterized by the Freundlich model (R²>0.8723), implying that multilayer adsorption governed by chemisorption was predominant. The principal adsorption mechanisms encompassed complexation, precipitation, ion exchange. FeN@BC-KOH demonstrated excellent reusability (8 cycles). This work provides a green, scalable, and high-efficiency strategy for valorizing agricultural waste loofah sponge into high-performance adsorbents, which exhibits good application potential in the remediation of actual heavy metal-contaminated water.
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高影响因子
危险品化学品经营许可证（带存储）