Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·123692
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IF 7.5
Yingying Fang,Yongkang Qiu,Yuyang Xi,Liang Si,Wei Wang,Weijun Peng,Yijun Cao
Lead (Pb) contamination in wastewater poses a persistent environmental challenge. Developing effective, sustainable adsorbents from renewable resources is a key goal of cleaner production. Herein, a bio‑based organic–inorganic composite hydrogel (I‑Hydrogel) was constructed using amino‑functionalized montmorillonite nanosheets (AMMT) combined with lignin (a renewable aromatic polymer), poly(vinyl alcohol) (PVA), and polyethyleneimine (PEI). In this design, AMMT provided inorganic adsorption-active sites, while the PVA/PEI network served as a three-dimensional scaffold to immobilize lignin and AMMT, generating a hierarchically porous framework enriched with nitrogen- and oxygen-containing functionalities. The optimized hydrogel exhibited a maximum Pb(II) adsorption capacity of 190.22 mg/g. The adsorption process was better described by the pseudo-second-order kinetic and Langmuir isotherm models and was thermodynamically favorable and endothermic within the investigated temperature range. Spectroscopic analyses indicated that Pb(II) uptake originated from a synergistic mechanism involving cation exchange at clay-associated sites and coordination interactions with amino, imine, hydroxyl, and other oxygen-containing groups in the hybrid network. This work demonstrates an effective strategy for integrating functional clay nanosheets with renewable bio‑based components into recoverable adsorbent platforms, offering a sustainable materials design approach that aligns with cleaner production principles for heavy‑metal removal from aqueous systems.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2026
·
IF 4.5
Nguyen Quang Tu Le,Van-Hien Pham,Bich-Ngoc Duong,Duy-Khoi Nguyen,Thi-Phuong-Tu Nguyen,Thien-Hoang Ho,Ngoc-Quyen Tran,Van-Phuc Dinh
Highly crystalline ETS-10 zeolite was prepared with a surface area of 250 m 2 /g and an average pore size of 1.67 nm. • Adsorption was highly pH-dependent, reaching peak efficiency at pH 5.0 for Pb(II) and pH 6.0 for both Cu(II) and Cd(II). • The Sips model best described the adsorption without being limited by concentration. • The adsorption kinetic of Pb(II) follows the PSO model, whereas the ID model controls the removal of Cd(II) and Cu(II). • The removal of Pb, Cu, Cd occurred via stoichiometric Na+/K+ ion exchange within 12-membered rings and surface complexation. Understanding adsorption kinetics and mechanisms play an instrumental role to determine the speed, efficiency, and pathways by which adsorbents remove pollutants. In this study, kinetics and mechanisms of the adsorption of Pb(II), Cu(II) and Cd(II) onto ETS-10 are investigated based on the combination of experimental, theoretical models (Langmuir, Freundlich, Sips, Pseudo-First-Order (PFO), Pseudo-Second-Order (PSO), Intraparticle diffusion (ID)), and modern analytical techniques (XRD, SEM-EDX, FT-IR and BET-BJH). Obtained results show that Sips models give the best fit with experimental data for three ions, while kinetic of Pb(II) adsorption follows PSO and kinetics of Cu(II) and Cd(II) uptakes follow ID models. The adsorption rates of Pb(II) > Cd(II) > Cu(II) during the diffusion process on the surface, whereas the ones of Pb(II) > Cu(II) > Cd(II) in the intraparticle diffusion process. The mechanisms of intraparticle diffusion, ion-exchange and complexion play mainly roles in the removal of Pb(II), Cd(II) and Cu(II). Download: Download high-res image (302KB) Download: Download full-size image
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NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Xin Chen,Yingjie Wan,Xiaobao Hou,Baofeng Wang,Fuqiang Huang
A green and sustainable strategy was proposed to efficiently convert polyvinyl chloride (PVC) waste into high-value porous carbon adsorbents for simultaneous waste plastic resourcing and heavy metal pollution control. The synthesis integrates solvothermal pretreatment with dimethylformamide (DMF), followed by KOH activation and heteroatom doping using thiourea as the N/S source. Solvothermal pretreatment increases carbon yield to 40 wt%. NS-PVC has a hierarchical pore structure with a high specific surface area of 1096.53 m2 g−1, moderate pore size distribution, and rich oxygen-containing, sulfur-containing, and nitrogen-containing functional groups, and comparative experiments confirmed that the doped N and S heteroatoms had a synergistic effect and promoted the adsorption performance, demonstrating exceptional removal efficiency (96%) for the high-concentration Pb(II) solution (1500 mg L−1), with a maximum adsorption capacity of 149.2 mg g−1. Through adsorption kinetics and isotherm studies, it was confirmed that the adsorption process of Pb(II) on NS-PVC was endothermic and consistent with the pseudo-second-order kinetic model and Langmuir models. By comparing the physicochemical properties of NS-PVC before and after the adsorption of Pb(II), it was confirmed that the adsorption of Pb(II) on NS-PVC was controlled by a combination of chemisorption and physisorption, including ion exchange, surface complexation, pore filling and electrostatic attraction.
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Journal of Building Engineering
·
2024
·
IF 6.7
Baomin Wang,Weigao Ding,Chengcheng Fan,Fei Liu,Wenxin Lu,Haoxiang Yang
C-S-H gel is a complex cementitious system, and the properties present significant difference with various Ca/Si ratios. The immobilization mechanism of three heavy metals in C-S-H gel at various Ca/Si ratios was investigated in this work from the prospect of the physical adsorption and chemical immobilization. Results showed that higher Ca/Si ratios can result in an increase in silicon chain polymerization, and lower BET specific area, and C-S-H gel with various Ca/Si ratios showed the excellent immobilization for heavy metals. Pb(II) and Zn(II) can form hydroxyl complex polyhedra in C-S-H under strongly alkaline environments, and increase the silicon chain polymerization degree similar to the doping of C-S-H gel by Al. However, Cd(II) was immobilized in the C-S-H gel with the formation of a solid solution under the action of ion exchange with Ca(II), rather than in the form of hydroxyl complex polyhedral and cadmium hydroxide coprecipitates. The highest adsorption capacity of Pb(II) was realized in C-S-H gel with a Ca/Si molar ratio of 0.9, reaching 95.6006 mg/g. Pb(II) was mainly immobilized in C-S-H gel via physical and chemical adsorption, and the effect of chemical adsorption tended to be significant as the Ca/Si molar ratio increased. And the formation of Pb 8 Ca(Si 2 O 7 ) 3 can be detected in C-S-H gel with a higher Ca/Si molar ratio.
研究领域:
材料科学
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环境科学
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2018
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IF 4.005
Zhongbo Shang,LiWen Zhang,Xuyang Zhao,Shanhu Liu,Deliang Li
A low-cost mercapto-modified coal gangue (CG-SH) was fabricated by modification of coal gangue (CG) with (3-mercaptopropyl) trimethoxysilane. The structure and composition for as-prepared CG-SH were characterized by using X-ray diffraction (XRD), Fourier transfer infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray fluorescence (XRF). Results indicated that larger amounts of mercapto-groups (-SH) was successfully introduced onto CG, which followed by acted as active sites for the removal of heavy metal cations, such as Pb(II), Cd(II) and Hg(II). The factors that affected the adsorption equilibrium as well as the removal efficiency, i.e., contact time, initial concentration, pH and temperature, were investigated in detail. The adsorption isotherms for Pb(II), Cd(II) and Hg(II) were well fitted with Langmuir model. The maximum adsorption capacity of CG-SH for Pb(II), Cd(II) and Hg(II) were calculated to be 332.8, 110.4 and 179.2 mg g −1 , respectively. The adsorption for Pb(II), Cd(II) and Hg(II) on CG-SH could be well described by pseudo-second-order kinetic model . And thermodynamic analysis suggests that the adsorption process for Pb(II) is exothermal, while that for Cd(II) and Hg(II) are endothermal. The results suggest CG-SH have great potential to be used as efficient absorbent for the removal of heavy metal cations from water.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jinxin Liu,Pan Wang,Hengjia Zhu,Jianming Pan
Conventional heavy metal adsorbents are limited by passive mass transfer mechanisms that constrain separation efficiency in practical applications. Herein, we report a novel approach integrating autonomous nanomotor propulsion with selective molecular recognition for enhanced Pb(II) removal. Bullet-shaped Janus nanomotor adsorbents (JSNMs@IIPs) were synthesized through asymmetric emulsion templating, featuring silver nanoparticle-catalyzed propulsion chambers and ion-imprinted polymer recognition shells. Under H 2 O 2 fuel (10.0 wt%), JSNMs@IIPs exhibited controlled autonomous motion (23.1μm s −1 ) that delivered significant kinetic enhancement with 265 % faster adsorption rates compared to static systems. The JSNMs@IIPs achieved maximum Pb(II) adsorption capacity (158.5 mg g −1 at 318 K) while maintaining high selectivity (k = 16.8–61.3) against competing metal ions and excellent regenerability (93 % capacity retention over seven cycles). XPS analysis revealed coordination-based adsorption through Pb-N interaction formation within pre-organized imprinted cavities, while autonomous motion enhanced mass transfer through active convection. This work establishes motion-enhanced molecular recognition for advanced separation technologies, demonstrating that nanomotor propulsion can simultaneously improve kinetics and maintain selectivity in complex separation challenges.
研究领域:
环境科学
·
纳米技术
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材料科学
·
化学工程
·
分析化学
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高影响因子
Journal of Analysis and Testing
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2024
·
IF 5.5
Wang Nan,Li Jiaqi,Ma Yitian,Xu Ahua,Tao Huajin,Huang Baoyu,Hao Song,Liao Jianjun,Lin Shiwei,Tang Yipeng,Hou Ying,Bian Chao,Li Xiaogan
In this paper, a sensor using carbon nanospheres modified boron-doped diamond (CNs/BDD) electrode for detecting heavy metal ions rapidly in aqueous solution is studied. The CNs/BDD electrode is characterized systematically by techniques including scanning electron microscopy (SEM), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). The electrochemical properties of the CNs/BDD electrode, BDD electrode and Au electrode are compared by cyclic voltammetry. It is found that the CNs/BDD electrode has more negative hydrogen evolution potential, a wider potential window and a larger effective electrode area, which is conducive to the accurate detection of heavy metal ions. The square-wave anodic stripping voltammetry (SWASV) is applied to assess and quantify the sensing capability of the CNs/BDD electrode. The effects of deposition potential, deposition time and other experimental parameters on the detection performance are studied. Under the optimal experimental conditions, CNs/BDD electrodes exhibit remarkable detection capabilities for lead (Pb(II) ions, in which a linear relationship within the concentration range from 1 to 140 µg/L with a 0.9994 correlation coefficient is obtained. Meanwhile, it has excellent repeatability with a low relative standard deviation (RSD) of 0.57%, and the achieved actual limit of detection (LOD) reaches 0.01 µg/L. In addition, the interference experiment results show that except for Cd(II) ions and Cu(II) ions, other common ions in water have little interference to Pb(II) ion detection. The Pb(II) ions recovery rates are 89.1–115.7% in the real water samples. Experimental analysis indicates that the CNs/BDD electrode possesses the advantages of low detection limit, short detection time, and simple experimental equipment, which meets the requirements of Pb(II) ions field detection.
研究领域:
环境科学
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电化学
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材料科学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Si Liu,JinHui Huang,Wei Zhang,LiXiu Shi,KaiXin Yi,ChenYu Zhang,HaoLiang Pang,JiaoNi Li,SuZhou Li
In this study, the adsorption behavior of Pb(II) on natural-aged and virgin microplastics in different electrolyte solutions was investigated. The results demonstrated that natural-aged microplastics exhibited higher adsorption capacity for Pb(II) compared to virgin ones, and the addition of CaCl 2 strongly inhibited the adsorption amount of Pb(II). The adsorption kinetics of Pb(II) adsorption were better fitted by the pseudo-second order model and Elovich equation, and were slowed down greatly at higher ionic strength. The rate-limiting steps of adsorption process were dominated by intra-particle diffusion. The adsorption isotherm of Pb(II) onto microplastics affected by salt ions can be well described by Freundlich model, the greater adsorption efficiency of natural-aged microplastics proved that adsorption process was multilayer and heterogeneous. In addition, pH significantly influenced the adsorption of Pb(II) due to the changes electrostatic interactions. The effect of fulvic acid in the electrolyte solutions was also revealed and attributed to the complexation with Na + and Ca 2+ . Furthermore, the higher pH and ionic strength in different environmental water dramatically decreased adsorption capacity onto microplastics. Finally, it’s confirmed that the adsorption mechanisms affected by salt ions mainly involve electrostatic interaction, surface complexation, and ionic exchange. These findings indicate that salt ions exert an important influence on the adsorption of heavy metals for MPs, which should be further concerned.
研究领域:
环境科学
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生态学
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·
IF 3.1
Bian Hang,Li Peng,Ma Yu,Liu Lin,Li Dong,Zhang Ning
In recent years, the surge in industrialization and urbanization has led to the release of a significant amount of heavy metal ions into water. These ions, when present in drinking water, can enter the human body and cause irreversible health problem. Metal-organic frameworks (MOFs) have drawn considerable attention for their outstanding ability to remove these heavy metal ions. However, MOF powders tend to aggregate in water, reducing their adsorption efficiency and potentially leading to secondary environmental pollution. In this regard, the development of MOF composites that are highly adsorptive, recyclable, and maintain stable dispensability in water is crucial for heavy metal ions removal. Herein, the in situ growth of zeolitic imidazolate framework (ZIF-8) on melamine sponge (MS) using a secondary growth method is reported. The resultant composite sponges exhibit high efficiency in adsorbing Pb(II) and Cu(II) from water and maintain good reusability. These findings offer a promising method in efficiently eliminating Pb(II) and Cu(II) from aqueous solutions.
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
ACS Omega
·
2019
·
IF 2.584
Liting Pan,Guanzhong Zhai,Xiaorong Yang,Hairong Yu,Changjing Cheng
Herein, we report a novel type of smart graphene oxide nanocomposites (MGO@PNB) with excellent magnetism and high thermosensitive ion-recognition selectivity of lead ions (Pb2+). The MGO@PNB are fabricated by immobilizing superparamagnetic Fe3O4 nanoparticles (NPs) and poly(N-isopropylacrylamide-co-benzo-18-crown-6 acrylamide) thermosensitive microgels (PNB) onto graphene oxide (GO) nanosheets using a simple one-step solvothermal method and mussel-inspired polydopamine chemistry. The PNB are composed of cross-linked poly(N-isopropylacrylamide) (PNIPAM) chains with numerous appended 18-crown-6 units. The 18-crown-6 units serve as hosts that can selectively recognize and capture Pb2+ from aqueous solution, and the PNIPAM chains act as a microenvironmental actuator for the inclusion constants of 18-crown-6/Pb2+ host–guest complexes. The loaded Fe3O4 NPs endow the MGO@PNB with convenient magnetic separability. The fabricated MGO@PNB demonstrate remarkably high ion-recognition selectivity of Pb2+ among the coexisting metal ions because of the formation of stable 18-crown-6/Pb2+ inclusion complexes. Most interestingly, the MGO@PNB show excellent thermosensitive adsorption ability toward Pb2+ due to the incorporation of PNIPAM functional chains on the GO. Further thermodynamic studies indicate that the adsorption of Pb2+ onto the MGO@PNB is a spontaneous and endothermic process. The adsorption kinetics and isotherm data can be well described by the pseudo-second-order kinetic model and the Langmuir isotherm model, respectively. Most importantly, the Pb2+-loaded MGO@PNB can be more easily regenerated by alternatively washing with hot/cold water than the commonly used regeneration methods. Such multifunctional graphene oxide nanocomposites could be used for specific recognition and removal of Pb2+ from water environment.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Bao-Lin Zhang,Wei Qiu,Pan-Pan Wang,Yu-Lei Liu,Jing Zou,Lu Wang,Jun Ma
This study examined the effects of two kinds of iron-trimesic metal-organic frameworks (MOFs) [MIL-100(Fe) and Fe-BTC] on adsorption of Pb(II) and Cd(II). For both materials, adsorption of Pb and Cd nearly approached equilibriums in the initial 2 min with high pseudo-second-order kinetics rate constants (0.895 g·mg −1 ·min −1 for Pb and 1.416 g·mg −1 ·min −1 for Cd). Both materials showed better adsorption performance with the increase of solution pH (from 2 to 7). Adsorption processes were endothermic, entropy-increased and spontaneous. The higher enthalpy change ( Δ H 0 ) and entropy change ( Δ S 0 ) values for Cd adsorption reflected the more difficult adsorption of Cd compared with Pb, which is related with more negative hydration enthalpy ( Δ H hyd Θ ) and larger ionic radius of Cd. Multilayer adsorption phenomena appeared with no maximum adsorptive capacity observed. Both Langmuir-Freundlich and Freundlich-BET models could well describe isotherms. Multilayer adsorption may be attributed to the formation of inner-sphere complexation and outer-sphere complexation. Bockris-Devanathan-Muller (BDM) electrical double layer theory was used for illustrating adsorption mechanism. The fixed-bed adsorption experiments with Fe-BTC showed outstanding elimination performance in initial operating period (>99.8% for Pb and >99.6% for Cd), with effective filtration volume of 980 mL for Pb and 300 mL for Cd. Recyclability test showed that Fe-BTC could be well regenerated by ethylenediamine tetraacetic acid disodium salt (EDTA-2Na). This study showed that MIL-100(Fe) and Fe-BTC are potential for practical heavy metal removal applications.
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
APPLIED CLAY SCIENCE
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2018
·
IF 3.641
Sidi Zhu,Mingzhu Xia,Yuting Chu,Muhammad Asim Khan,Wu Lei,Fengyun Wang,Tahir Muhmood,Along Wang
Herein, we reported the adsorption and desorption of Pb(II) on l -lysine modified montmorillonite (L-Mt) with molecular dynamics simulation. l -lysine (Lys) modified montmorillonite (L-Mt) was prepared, characterized by various analytical techniques, and the simulation studies were performed to evaluate the interlayer structure and interaction properties of l -lysine and L-Mt. The results of X-ray powder diffraction (XRD) and Fourier transform infrared (FTIR) spectrum suggested that Lys + was intercalated into the interlayer of Na-montmorillonite (Na Mt) successfully. The batch adsorption experiments were implemented to study the adsorption capacity of Pb(II) on L-Mt in water. The maximum adsorption capacity of Pb(II) on the L-Mt (up to 43.3 mmol/100 g) were considerably higher than that on Na Mt (up to 15.3 mmol/100 g), at room temperature. The adsorption isotherms of both, L-Mt and Na Mt can fit the Langmuir isotherm . The adsorption experiments showed that Pb(II) removal efficiency of L-Mt is better than Na Mt in acidic solution. The simulation results revealed the micro-mechanism of Lys + inserted into the interlayer gallery of Na Mt. It can be deduced that lysine interacted with montmorillonite surface mainly through the protonated side-chain amino group rather than through the protonated main-chain amino group or deprotonated carboxyl group . These consequences are expected to elucidate the adsorption mechanisms occurring at the water/clay minerals interface at atom level, providing significant insight into the adsorption and retention of Pb(II) on L-Mt composite, and lead to relevant engineering applications while treating heavy metals of wastewater.
研究领域:
环境科学
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材料科学
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化学
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高影响因子
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