Journal of the Taiwan Institute of Chemical Engineers
·
2015
·
IF 3
Zhuoxing Wang,Jiang Xu,Yunjun Hu,Heng Zhao,Junliang Zhou,Yu Liu,Zimo Lou,Xinhua Xu
A selective adsorbent for Hg(II) was prepared by coating Fe 3 O 4 nanoparticles with SiO 2 which was further functionalized with thiol (–SH) group. The new adsorbent (Fe 3 O 4 @SiO 2 -SH) was shown to adsorb aqueous Hg(II) species in a wide range of pH (1.0–8.0) conditions. The Hg(II) adsorption capacity q e was more than 90.0 mg g −1 at pH > 3.0, and was slightly decreased to 84.6 mg g −1 under strong acidic conditions due to the electrostatic repulsion. The Langmuir isotherm model fitted the adsorption data better than the Freundlich, Temkin, and Dubinin-Radushkevich isotherms models. The maximum adsorption capacity of Fe 3 O 4 @SiO 2 -SH for Hg(II) was 132.0 mg g −1 . The adsorption kinetics were shown to follow the pseudo-second-order kinetic model, and the kinetic constant k 2 was 2.4 × 10 −3 g mg −1 min −1 . The magnetic retrieve of the newly-developed adsorbent was easily carried out via an external magnetic field, enabling both excellent adsorbent utilization and adsorption efficiency at high Hg(II) concentrations.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Duanlian Tang,Xiaoying Lyu,Zhixian Huang,Renwei Xu,Jie Chen,Ting Qiu
Nitrogen-doped microporous carbon, which features a uniquely tunable porosity, exhibits promisingly high adsorption prospects in the greenhouse gas capture and water treatment. Herein, we propose a series of novel N-doped microporous carbons (CMPA n -C1000), and precisely tune their porosities via a direct pyrolysis of rigid conjugated microporous poly(aniline)s (CMPA n , n = 1, 2, 3) with pore size difference in a molecular level, as achieved by simply tuning their linkers with varying sizes, planarity, and symmetry. The CMPA3-C1000, with a satisfactory amount of nitrogen heteroatoms , high S BET of ∼800 m 2 g −1 , and large ultra-micropore volume of 0.25 cm 3 g −1 , has excellent CO 2 capture ability ( i.e. , 5.1 mmol g −1 at 273 K, 1 atm) and Hg(II) adsorption performance ( i.e. , Q e = 571 mg g −1 ; k 2 = 0.0031 g mg −1 min −1 ), respectively. CMPA3-C1000 might perform chemisorption towards Hg(II), according to calculations using density functional theory and experimental data; nitrogen atoms in porous carbon contributed to this excellent Hg(II) adsorption.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
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.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
·
吸附技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Xiaosai Hu,Haoran Cao,Man He,Junrui Miao,Yanyan Jin,Hongming Lv
Polyethyleneimine (PEI), with an abundance of amino groups, demonstrates a strong affinity for heavy metal ions, thus emerging as a promising candidate for applications in wastewater treatment. However, the inherent water solubility of PEI limits its direct use for the remediation of heavy metals. Contrary to the previous synthetic approaches that employed PEI solely as a surface modifier, the present work utilizes the PEI polymer as the fundamental matrix for the development of water-insoluble polyethyleneimine derivative adsorbents (PAPEI). This innovative method eliminates the need for additional solid substances, enabling the effective elimination of Hg(II) from aqueous solutions. PAPEI adsorbents achieved a high adsorption capacity of 1832 mg g−1 for Hg(II) with a good selectivity (distribution coefficient Kd = 3.2 × 104 mL g−1). The adsorption process between the PAPEI adsorbents and Hg(II) was primarily attributed to chelation affinity. This work proposed a straightforward approach for designing PAPEI adsorbents that can efficiently remove Hg(II) from aqueous environments.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
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.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2016
·Vol. 74
·期 12
·2946-2957
·
IF 1.064
Wang Shixiang,Liu Yong,Fan Qin,Zhou Anlan,Fan Lu,Mu Yulan
An environmental friendly and economic natural biopolymer-sodium humate (HA-Na) was used to capture Hg(II) from aqueous solutions, and the trapped Hg(II) (HA-Na-Hg) was then removed by aluminium coagulation. The best Hg(II) capturing performance (90.60%) was observed under the following conditions: initial pH of 7.0, coagulation pH of 6.0, HA-Na dosage of 5.0 g L −1 , Al 2 (SO 4 ) 3 .18H 2 O dosage of 4.0 g L −1 , initial Hg(II) concentration of 50 mg L −1 and capturing time of 30 min. The HA-Na compositions with the molecular weight beyond 70 kDa showed the most intense affinity toward Hg(II). The results showed that the reaction equilibrium was achieved within 10 min (pH 7.0), and could be well fitted by the pseudo-second-order kinetics model. The capturing process could be well described by the Langmuir isotherm model and the maximum capturing capacity of Hg(II) was high up to 9.80 mg g −1 at 298 K (pH 7.0). The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis showed that the redox reaction between Hg(II) and HA-Na and the coordination reaction of carboxyl and hydroxy groups of HA-Na with Hg(II) were responsible for Hg(II) removal. The successive regeneration experiment showed that the capturing efficiency of humates for Hg(II) was maintained at about 51% after five capture-regeneration recycles.
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
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.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Yu-Ting Zhuang,Xiao Zhang,Dan-Hua Wang,Yong-Liang Yu,Jian-Hua Wang
A hierarchical and hybridized hydrogel with rational structure and composition as adsorbent possesses a series of distinct advantages, e.g., fast ion diffusion, high selectivity and good stability. Herein, a novel three-dimensional (3D) molybdenum disulfide (MoS 2 )-reduced graphene oxide (rGO) hydrogel with two-dimensional heterointerfaces is fabricated by an eco-friendly one-pot hydrothermal method. The heterointerfacial area could be readily tuned by the regulation of MoS 2 /rGO ratio, in order to improve the adsorption capacity and selectivity. The 3D MoS 2 -rGO hydrogel with 70 wt% MoS 2 shows high selectivity for Hg(II) ions, with a distribution coefficient value (K d ) of 7.49 × 10 6 mL g −1 even in the presence of other coexisting ions. More attractively, the free-standing and flexible 3D MoS 2 -rGO hydrogel can be used as a column-packed device, providing an efficient pathway for the fast removal of 80 mg L − 1 Hg(II) within 7 min to achieve a tolerable concentration of < 2 μg L −1 in 30 mL water with 5 mg of 3D MoS 2 -rGO hydrogel. Considering that the direct-contact adsorption is more efficient than oscillating adsorption, the 3D MoS 2 -rGO hydrogel as nanobuilding block shows a promising potential for cleaning the point-of-use water.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Lytuong Tran,Pingxiao Wu,Yajie Zhu,Shuai Liu,Nengwu Zhu
A novel approach to prepare adsorbents for Hg(II) uptake from aqueous media based on the grafting of dimercaprol (BAL), containing thiol and hydroxyl groups, onto the natural montmorillonite and vermiculite was investigated concerning the evaluation of the adsorption capacity. The kinetic study showed that the adsorption process abided by pseudo-second-order model. The adsorption behavior of Hg(II) onto the obtained samples fitted well with Langmuir isotherm model, exhibiting an enhanced maximum adsorption capacity of 8.57 and 3.21 mg g −1 for BAL-Vm and BAL-Mt, respectively. The feasibility of Hg(II) uptake onto the the samples was studied thermodynamically and the calculated coefficients such as Δ H , Δ S and Δ G indicated a physical and spontaneous process. The pH values and coexisting cations had a great influence on Hg(II) removal, confirming the optimal pH value of 4.0–5.0 and the negative correlation between the ionic strength and the adsorption capacity of Hg(II). In general, BAL-Vm possessed a higher efficiency of Hg(II) uptake than BAL-Mt, contrary to that of the pristine clays. The pristine and functionalized materials were investigated by XRD, FTIR, BET, SEM and zeta potential analysis to gain in-depth insight into the structure and surface morphology. The results showed that BAL was successful grafted on montmorillonite and vermiculite surface, providing plentiful adsorption sites as chelating ligands. The mechanisms of Hg(II) adsorption on these samples could be further explained as ion exchange and electrostatic attraction for Vm and Mt, and formation of complexes for BAL-Vm and BAL-Mt.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Linghao He,Shuai Zhang,Minghua Wang,Donglai Peng,Fufeng Yan,Zhihong Zhang,Liming Zhou
Two novel nanocomposites of zinc phosphate [Zn 3 (PO 4 ) 2 ] and Hg 2+ -targeted DNA [Zn 3 (PO 4 ) 2 @DNA] and Zn 3 (PO 4 ) 2 and multi-wall carbon nanotubes (MWCNTs) modified with Hg 2+ -targeted DNA [Zn 3 (PO 4 ) 2 @MWCNTs-DNA] were fabricated by the assembly of Hg 2+ -targeted DNA strands with Zn 2+ ions. Two as-prepared nanocomposites were subsequently used as electrochemical biosensors for sensitively detecting Hg 2+ due to the combination effect of the formation of T–Hg 2+ –T coordination between DNA strands and Hg 2+ and the direct adsorption of Hg 2+ onto porous nanocomposites. In comparing with Zn 3 (PO 4 ) 2 @DNA nanocomposite, the crystallization degree of Zn 3 (PO 4 ) 2 @MWCNTs-DNA was improved due to the presence of MWCNTs, which further enhance electrochemical activity of the nanocomposite. As a result, Zn 3 (PO 4 ) 2 @MWCNTs-DNA nanocomposite-based electrochemical biosensor showed a higher sensitivity toward Hg 2+ detection in aqueous solution than Zn 3 (PO 4 ) 2 @DNA-based biosensor. It showed a detection limit of 0.071 nM within the range of 0.1–50 nM of the concentration of Hg 2+ . This newly developed biosensor also presented excellent selectivity, repeatability, and applicability in Hg 2+ detection. Therefore, the fabricated Zn 3 (PO 4 ) 2 -based nanocomposite using this novel strategy showed their considerable potential use in water or environmental treatment.
研究领域:
环境科学
·
分析化学
·
生物传感技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Kun Jia,Keyu Yi,Weixi Zhang,Penghua Yan,Shuai Zhang,Xiaobo Liu
Because of its strong toxicity to the ecosystem and human beings, mercury is regarded as one of the most hazardous heavy metals . Among various fluorescent sensors that have been designed for Hg (II) detection, the probes showing Hg (II) concentration dependent ratiometric fluorescent responses normally exhibited improved analytical performance. Herein, we have synthesized series of amphiphilic polyurethane (PU) to encapsulate hydrophobic fluorescent quantum dots (QD) via the emulsion confinement self-assembly, leading to generation of QD@PU colloids whose red emission can be selectively quenched by Hg (II) among other metal ions . In order to further improve the Hg (II) detection performance of QD@PU probe, the green emitting carbon nanodots (CD) were synthesized and conjugated with QD@PU, resulting to formation of CD-QD@PU colloidal probe showing ratiometric fluorescent response towards Hg (II), which finally contributed to an enhanced sensitivity and wider linear range for Hg (II) detection. More interestingly, both QD@PU and CD-QD@PU doped stretchable PU membranes still hold naked eye discrimination for Hg (II). Basically, the current work revealed a universal protocol to prepare fluorescent probe for Hg (II) detection using PU and low dimensional fluorescent nanoparticles as building blocks, which will open new way for design and fabrication of other advanced sensors and analytical devices.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 6
·347
·
IF 4.2
Chao Liu,Hui Wang,Shengmin Xu,Hongbao Li,Yilin Lu,Chuhong Zhu
Mercury ions can be enriched along the food chain and even low concentrations of mercury ions can seriously affect human health and the environment. Therefore, rapid, sensitive, and highly selective detection of mercury ions is of great significance. In this work, we synthesized Fe3O4@SiO2@Au three-layer core/shell nanoparticles, and then modified 4-MPy (4-mercaptopyridine) to form a SERS sensor. Mercury ions in water can be easily captured by 4-MPy which were used as the reporter molecules, and the concentration of mercury ions can be evaluated based on the spectral changes (intensification and reduction of peaks) from 4-MPy. After the mercury ion was combined with the pyridine ring, the peak intensity at 1093 cm−1increased with the concentration of mercury ion in the range of 10 ppm–1 ppb, while the Raman intensity ratio I (416 cm−1)/I (436 cm−1) decreased with the increase of mercury ion concentration. This magnetically separatable and recyclable SERS sensor demonstrates good stability, accuracy, and anti-interference ability and shows the potential to detect actual samples. Furthermore, we demonstrate that the probe is applicable for Hg2+imaging in macrophage cells.Keywords:core/shell nanoparticles;4-pyridinethiol;surface-enhanced Raman spectroscopy (SERS);Mercury (II) ion;Raman cell imaging
研究领域:
纳米技术
·
分析化学
·
环境科学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）