JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Yu Sun,Siyu Zuo,Ziye Li,Ping Li,Jianshe Hu
With mercury pollution causes serious threats to ecosystems and human health because of its extreme toxicity and bioaccumulation, the development of efficient removal technologies has become an urgent environmental priority. This study introduces a novel adsorbent thiazolo[5,4- d ]thiazole conjugated microporous polymer (TzTzCMP) for efficient Hg(II) removal from wastewater. TzTzCMP synthesized via condensation of dithiocarbamate and triformyl-phenol, exhibits a coral-like porous structure with a high specific surface area of 436.86 m 2 /g and sulfur-rich active sites containing 15.15 wt% sulfur, enabling exceptional Hg(II) adsorption. Experiments demonstrated rapid kinetics, reaching equilibrium within 10 min, and a maximum adsorption capacity of 1050 mg/g. The adsorption kinetics and isotherm data for Hg(II) on TzTzCMP are well described by the pseudo-second-order and Langmuir models, respectively, indicating that chemical interactions dominate the adsorption process. The material maintained >95 % efficiency over five regeneration cycles and showed good selectivity under coexisting ion interference, attributed to Hg(II) coordination with N/S atoms in TzTzCMP, as confirmed by X-ray Photoelectron Spectroscopy (XPS) analysis and density functional theory (DFT) calculations. Fixed-bed column tests achieved 99.99 % removal, reducing effluent concentration to 1 μg/L and meeting drinking water standards. Combining high adsorption capacity and removal rate, rapid adsorption efficiency, good stability and reusability, TzTzCMP presents a promising solution for industrial Hg(II)-contaminated wastewater treatment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jiajie Zhang,Yilei Fang,Mengyu Tang,Xu Wu,Xin Yu,Ranwen Ou
Mercury (Hg) is a highly toxic and bioaccumulative heavy metal, the chemical-free regeneration of Hg(II) adsorbent is in great demand but remains a challenge, due to the strong binding between Hg(II) and adsorption sites. In this study, a thermally regenerable composites, PDEA-MOF-808, was synthesized by encapsulating the thermo-responsive polymer poly N-[2-(Diethylamino)ethyl]acrylamide (PDEAEAM) within a porous metal-organic framework (MOF-808). The amide and amine functional groups in PDEAEAM, especially the tertiary amine moieties, played key roles in Hg(II) adsorption, achieving a high capacity of 497.5 mg g −1 and rapid equilibrium within 20 min. The composite also exhibited exceptional selectivity (K d = 3.3 × 10 5 mL g −1 ), leading to high Hg(II) removal efficiencies of over 99.5 % when treating industrial wastewater and natural water. Furthermore, it was efficiently regenerated in warm water at 55 °C within 20 min, maintaining 91.3 % efficiency after ten adsorption-desorption cycles, presenting good reusability and stability. The excellent Hg(II) adsorption performance was attributed to ligand chelation between oxygen- and nitrogen-containing functional groups. This work highlights a sustainable, chemical-free strategy for heavy metal removal and offers a promising approach for developing high-performance, regenerable adsorbent for water treatment applications.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
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IF 3.752
Biao ZENG,Chao XIONG,Wei WANG,Guo LIN,Song CHENG,Jun CHANG
A novel adsorbent (MTZ-MOFs) was synthesized by a one-step reaction of zinc nitrate hexahydrate and 1-(2-dimethylaminoethyl)-1H-5-mercaptotetrazole to remove mercury from waste water. The results showed that MTZ-MOFs had excellent selectivity and repeatability for Hg(II), the optimum pH was 3.0, the maximum adsorption capacity was 872.8 mg/g, and the process was a spontaneous exothermic reaction. The adsorption behavior was chemisorption, which conformed to the pseudo-second-order kinetic and Freundlich isothermal model. Moreover, the adsorption mechanism showed that the adsorption process mainly depended on ion exchange and chelation, and the synergistic action of S and N atoms played a key role. So, MTZ-MOFs were an efficient adsorbent for mercury ion removal.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2017
·Vol. 28
·期 12
·1735-1742
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IF 1.907
Gonglei Shao,Huajie Yao,Ao Liu,Zhonglu Zhang,Jiajia Huang,Siguo Yuan
A series of novel adsorption resins were synthesized via the chloromethylation of polyphenylene sulfide (PPS) resin and subsequent functional group conversion reaction. Their chemical structure, thermal stability, and morphology were systematically characterized by the Fourier transform infrared spectroscopy, elemental analysis, Raman spectroscopy, thermogravimetric analysis, scanning electron microscope, and energy dispersive spectrometer, respectively. The experimental results showed that the thioureido, mercapto, aminopyridine, and quaternary ammonium groups had been respectively introduced into PPS matrix, the functional group content of PPS-based mercapto resin (HS-PPS), aminopyridine resin (AP-PPS), and quaternary ammonium resin (QA-PPS) were about 2.20, 1.71, and 2.61 mmol g −1 , respectively. The adsorptive performance for Hg (II) and As (V) were studied by batch adsorptive method; the adsorption capacities of the HS-PPS and AP-PPS resin for Hg (II) were 210.65 and 169.06 mg g −1 . The adsorption capacity of the QA-PPS resin was 88 mg g −1 for As (V). Copyright © 2017 John Wiley & Sons, Ltd.
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DESALINATION
·
2026
·
IF 9.9
Yingyang Bu,Ran Han,Tianxu Feng,Wenxuan Wang,Guangze Nie
Efficient decontamination of toxic mercury from water remains a critical challenge. MoS 2 nanoadsorbents exhibit significant advantages for mercury capture due to the strong soft-soft interactions between Hg(II) and sulfur. However, conventional MoS 2 nanosheets or MoS 2 -based nanocomposites are often hindered by practical limitations, including difficulty in separation and recovery, pore blockage, nanoparticle leaching, and high pressure drop in flow-through systems. Herein, we report a millimeter-sized nanocomposite (MoS 2 @PDA@CER) fabricated by coating MoS 2 nanosheets onto a cation exchange resin via a polydopamine (PDA) adhesive layer. The millimeter-scale architecture enables easy separation and superior hydraulics for flow-through operation. MoS 2 @PDA@CER exhibits broad pH applicability (1–8), ultra-high adsorption capacity (1168.18 mg/g at pH 5), rapid adsorption kinetics (equilibrium within 1 h), and exceptional selectivity toward Hg(II). These outstanding properties are attributed to the synergy between the unique millimeter-sized structure of the resin support and the strong affinity of MoS 2 for Hg(II). Furthermore, the nanocomposite demonstrates deep purification capability, effectively treating various trace mercury-contaminated waters to meet drinking water standards. It also shows excellent reusability, with no significant loss in adsorption capacity after 10 cycles. In fixed-bed column tests, MoS 2 @PDA@CER successfully treated ∼3000 BV of Hg(II)-spiked wastewater, with effluent complying with the Chinese integrated wastewater discharge standard (50 μg/L); notably, the first 900 BV even met the drinking water standard (1 μg/L). All the results indicate that MoS 2 @PDA@CER is a scalable and efficient adsorbent for the remediation of mercury-contaminated wastewater.
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JOURNAL OF MOLECULAR STRUCTURE
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2026
·
IF 4.9
Yu-Fen Zhang,Yi-Ping Tian,Si-Yu Tian,Xiao Wang,Ji-Jiang Wang,Long Tang,Er-Lin Yue,Xiang-Yang Hou
Developed novel electrochemical sensors with nano-sheet structured, addressing the low conductivity and poor stability of traditional MOFs in sensing applications. As far as we know, this is the first report. • Realized simultaneous determination of Cu²⁺ and Hg²⁺ with outstanding performance: wide linear range, low detection limit, rapid electrochemical response, excellent selectivity against interfering ions, good reproducibility, and long-term stability. • Comprehensively elucidated the sensing mechanism by integrating Laviron’s adsorption theory, involving the intrinsic electrochemical activity of MOF nanosheets and specific interactions between MOF crystalline frameworks and target metal ions. • Validated practical applicability in complex real matrices (seaweed food samples) with satisfactory accuracy and recoveries meeting international analytical standards, enabling on-site heavy metal monitoring. • Provided a rational design strategy for the development of high-performance MOF-based sensors, highlighting significant practical potential in food safety and environmental heavy metal detection. Heavy metal ion presence in food poses a severe threat to human and ecological health. It is important to achieve rapid, sensitive and efficient detection of heavy metal ions. Two novel electrochemical sensing platforms based on Ni-MOF1/GCE and Cd-MOF2/GCE modified electrodes were developed for discriminative simultaneous detection of Cu²⁺ and Hg²⁺ in seaweed food matrices. Two sensors exhibit significantly enhanced electrochemical performance compared to conventional MOF-based sensors, featuring a three-dimensional Nano-network structure and abundant accessible active sites. Under optimized differential pulse anodic stripping voltammetry (DPV) conditions, two sensors exhibited rapid responses, wide linear ranges (20–180 μM for Cu²⁺, 7–180 μM for Hg²⁺) for both Cu²⁺ and Hg²⁺, with low limit of detection (LOD, 3.00 × 10⁻⁹ M for Cu²⁺, 2.50 × 10⁻⁹ M for Hg²⁺). Benefiting from the structural characteristics, two sensors show highly selective, sensitive, long-term stability under real sample testing. Applications in real seaweed food samples demonstrated high recovery rates and validated the sensor’s reliability. A possible mechanism involving the electrochemical sensing of Cu²⁺ and Hg²⁺ was proposed by integrating laviron’s adsorption theory. This work provides superior sensors, offering promising prospects for Cu²⁺ and Hg²⁺ monitoring in environmental and agricultural safety. Ni-MOF1/GCE and Cd-MOF2/GCE sensors are constructed as electrochemical sensors with excellent simultaneous ultrasensitive determination performance for trace multiple Cu 2+ and Hg 2+ in food samples. Download: Download high-res image (420KB) Download: Download full-size image
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zina Zhang,Kaiyue Fan,Tengda Shi,Tong Hao,Jiaqi Li,Yanan Yang,Yu Bian,Hong Zheng
The key to removing and detecting trace Hg (II) in water is to achieve rapid adsorption and high adsorption capacity of the adsorbent while maintaining the simplicity and safety of the adsorbent preparation process. Herein, we report a post-modification of covalent organic frameworks by medical antidote dimercaprol (DMC-COF) for efficacious removing and detection on trace Hg (II) in water. The as-prepared DMC-COF showed excellent selectivity to trace Hg (II) and fast adsorption dynamics, which was attributed to the abundance of sulfhydryl and hydroxyl sorption sites in the COF mesopores and on the COF surface. The effluent concentration of Hg(II) coexisting with Ca(II) reduced from 30 μg·L −1 to the permissible limit (1 μg·L −1 ) of potable water standard within 30 s. The sorption equilibrium was achieved during 3 min and the adsorption rate reached over 98 %. The material also showed a wide applicable pH range (3.5–9.5), excellent regeneration feasibility and selectivity of Hg(II) coexisting with a wide range of heavy metals in tap water, and the effluent concentration of Hg(II) coexisting with trace of As(V), Cr(VI), Cd(II) and Pb(II) could reduce from 30 to 0.19 μg·L −1 during 10 min. Moreover, Hg(II) of 3, 6, 10 and 30 μg·L −1 in tap water could be achieved to meet the WHO standard within 1 min. Meanwhile, its conjugated framework could be used as a signal sensor for rapid testing for low concentration Hg(II) in water, with a fluorescence detection limit of 1.06 mg·L −1 . DFT calculations yielded the optimized structure of DMC grafted onto COF-V, revealing that Hg²⁺ and Hg(OH)₂ primarily adsorbed at the -S and -SH sites, predominantly through van der Waals interaction, whereas Hg(OH)⁺ mainly adsorbed at all the -S, -SH and -OH sites, governed by notable attraction.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Yuping Xiang,Yingying Guo,Guangliang Liu,Yanwei Liu,Maoyong Song,Jianbo Shi,Ligang Hu,Yongguang Yin,Yong Cai,Guibin Jiang
Particle-bound mercury (HgP), ubiquitously present in aquatic environments, can be methylated into highly toxic methylmercury, but it remains challenging to assess its bioavailability. In this study, we developed anEscherichia coli-based whole-cell biosensor to probe the microbial uptake of inorganic Hg(II) and assess the bioavailability of HgP sorbed on natural and model particles. This biosensor can quantitatively distinguish the contribution of dissolved Hg(II) and HgP to intracellular Hg. Results showed that the microbial uptake of HgP was ubiquitous in the environment, as evidenced by the bioavailability of sorbed-Hg(II) onto particulate matter and model particles (Fe2O3, Fe3O4, Al2O3, and SiO2). In both oxic and anoxic environments, HgP was an important Hg(II) source for microbial uptake, with enhanced bioavailability under anoxic conditions. The composition of particles significantly affected the microbial uptake of HgP, with higher bioavailability being observed for Fe2O3 and lower for Al2O3 particles. The bioavailability of HgP varied also with the size of particles. In addition, coating with humic substances and model organic compound (cysteine) on Fe2O3 particles decreased the bioavailability of HgP. Overall, our findings highlight the role of HgP in Hg biogeochemical cycling and shed light on the enhanced Hg-methylation in settling particles and sediments in aquatic environments.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Lu Feng,Tianyu Zeng,Haobo Hou
For the serious hazards to human and natural environment caused by the toxic Hg(II), a new MOF-based adsorption material, UiO-66-AHMT, was designed and synthesized by incorporating the 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole molecule into the UiO-66-NH 2 matrix and used for the removal of Hg(II) from aqueous media. As expected, UiO-66-AHMT exhibits rapid removal ability toward Hg(II) and maximum uptake capacity of 327.88 mg/g at 298 K and pH = 5, the adsorption capacity is improved significantly compared to the unmodified UiO-66-NH 2 and comparable in the excellent UiO-66 based adsorbents reported so far. The adsorption behaviors of UiO-66-AHMT conform well to the pseudo-second-order and Langmuir models, respectively, which indicate that the adsorption process is mainly monolayer chemisorption . Meanwhile, UiO-66-AHMT shows strong selectivity to Hg(II) in the coexistence of varieties of metal ions and outstanding recyclability characteristics. To investigate the adsorption mechanism, the Hg(II) loaded UiO-66-AHMT mainly analyzed by XPS suggests that the nitrogen- and sulfur-containing groups in grafted molecule have the synergistic complexation to Hg(II). Furthermore, the binding strength between different function sites and Hg(II) are quantified and the stable complexation patterns are obtained based on the DFT calculation. These results strongly confirm that UiO-66-AHMT is a potential adsorbent in the practical treatment of wastewater containing Hg(II).
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Nano Materials Science
·
2021
·
IF 0
Biao Zeng,Wei Wang,Sijin He,Guo Lin,Wenjia Du,Jun Chang,Zhao Ding
Mercury (Hg) ions can lead to a serious impact on the environment; therefore, it was necessary to find an effective method for absorbing these toxic Hg ions. Here, the adsorbent (Zn-AHMT) was synthesized from zinc nitrate and 4-amino-3-hydrazine-5-mercapto-1,2, 4-triazole (AHMT) by one-step method and, characterized the microstructure and absorption performance by fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Thermal Gravimetric Analyzer (TGA) and X-ray photoelectron spectroscopy (XPS). Through a plethora of measurements, we found that the maximum adsorption capacity was 802.8 mg/g when the optimal pH of Zn-AHMT was 3.0. The isothermal and kinetic experiments confirm that the reaction process of Zn-AHMT was chemisorption, while the adsorption process conforms to the Hill model and pseudo second order kinetic model. Thermodynamic experiments showed that the adsorption process was spontaneous and exothermic. Selective experiments were performed in the simulated wastewater containing Mn, Mg, Cr, Al, Co, Ni, Hg ions. Our results showed that the Zn-AHMT has a stronger affinity for Hg ions. The removal rate of Zn-AHMT remained above 98%, indicating that the Zn-AHMT had a good stability validated by three adsorption-desorption repeatable tests. According to the XPS results, the adsorption reaction of Zn-AHMT was mainly attributed to the chelation and ion exchange. This was further explained by both density functional theory (DFT) calculation and frontier molecular orbital theory. We therefore propose the adsorption mechanism of Zn-AHMT. The adsorption reaction facilitates via the synergistic action of S and N atoms. Moreover, the bonding between the adsorbent and the N atom has been proved to be more stable. Our study demonstrated that Zn-AHMT had a promising application prospect in mercury removal.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xing Chen,Ji-Xing Zhao,Jia-Wei Wang,Yao Liu,Lian-Chao Wang,Rohan Weerasooriya,Yu-Cheng Wu
Development of robust methods for rapid detection of heavy metal ions and associated chemical species in water is challenging. Different mercury species are ubiquitous in the environment; they bio-amplify and undergo methylation into organo-Hg species. We developed a new electrochemical method for rapid screening of free Hg 2+ in water by square wave anodic stripping voltammetry (SWASV) on a metal-organic framework (MOF) platform using ZIF-67 as starting substrate. Bimetallic MOF structures were fabricated by doping iron, manganese or nickel ions into ZIF-67 using a facile NaOH treatment. The GCE was modified with Ni, Mn, or Fe doped ZIF-67 nanocomposites to enhance performance for Hg 2+ detection. When compared to pure ZIF-67/GCE, the Hg 2+ detection sensitivity by the metal ions-doped ZIF-67/GCE was increased by 260%. The detection limit was improved by 60%. The Fe doping on ZIF-67 (Fe x Co y ) significantly improves electroanalytical performance due to the formation of iron oxide on ZIF-67. The GCE modified with Fe 1 Co 1 nanocomposite showed the best performance for electrochemical detection of Hg 2+ . Besides, the cyclic voltammetry (CV) and electrochemical impedance spectrum (EIS) data also confirmed that Fe doping of the ZIF-67 enhanced the electron transfer rate at the solid-liquid interface. Hg 2+ detection and quantification at this new chemically modified sensing electrode were not interfered by Cd 2+ , Pb 2+ , and Cu 2+ . The Fe 1 Co 1 modified GCE is stable when used repeatedly for ten cycles. The spike recovery of 0.3 to 1.00 µM Hg 2+ with Fe 1 Co 1 modified GCE was always above 99.0%. The chemically modified sensor with Fe 1 Co 1 holds a promise in monitoring Hg 2+ at trace concentrations.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 10
·1-9
·
IF 6.232
Jiao Mingxia,Li Yun,Jia Yuxiu,Xu Le,Xu Guiyun,Guo Yingshu,Luo Xiliang
Water-soluble Cu nanoclusters (NCs) with tunable emission were synthesized through an eco-friendly one-pot aqueous method. Blue-, green-, and red-emitting NCs with the emission peaks at 420 nm, 505 nm, and 630 nm were obtained by employing ethanediamine, cysteine, and glutathione as surface ligands, respectively. The ligand effects on the optical properties of Cu NCs were studied by the single variable method. It has been revealed by systematic characterizations that the dependence of emission color on the structures of ligands was mainly attributed to their different size-tuning effects. Glutathione has the strongest chelating ability and it can significantly reduce the monomer reactivity and thus decrease the supersaturation degree of the reaction, which is favorable for modulating Cu precursor to grow into larger NCs. In contrast, ethanediamine ligand resulted in smaller nanoclusters due to its weaker binding capability. Because of the strong emission and terrific fluorescent stability, Cu NCs capped with ethanediamine, possessing an emission peak at 420 nm when excited at a wavelength of 350 nm, were directly used for probing Hg(II) with satisfying selectivity, presenting a linear range of 0.1–5.0 mM and a detection limit of 33 μM. The sensor showed good performance in real sample analysis with recoveries ranging from 99% to 103%, and comparable accuracy with atomic fluorescence spectroscopy, manifesting the reliability of the current strategy for sensing Hg(II).
Water-soluble copper nanoclusters with blue, green, and red emissions were synthesized by employing ethanediamine, cysteine, and glutathione as surface ligands respectively, and the blue-emitting nanoclusters with strong emission and terrific stability were directly used for selectively sensing Hg 2+ .
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