Desalination and Water Treatment
·
2024
·
IF 1
Bo Zhu,Lingyu Zhou,Qi Zhang,Xiaodong Wang,Hongmei Jiang,Aimin Lu
A rigid Pb(II)-imprinted polymers were synthesized by the combination of surface-imprinted method with sol–gel method using (3-mercaptopropyl) trimethoxysilane as a functional monomer, Pb(II) and hexadecyltrimethylammonium bromide as template ions and tetraethoxysilane as cross-linker and were used as adsorbents for the removal of Pb(II). The effect of molar ratio of cross-linker to functional monomer on the morphology and adsorption performance has been evaluated. The effects of pH, initial concentration and adsorption time on the adsorption performance of Pb(II) on both sorbents were investigated. The maximum adsorption capacity calculated from Langmuir isotherm was 68.03 mg g -1 and 17.13 mg g -1 for Pb(II)-IIP and Pb(II)-NIP, respectively. Kinetics studies showed that the adsorption process obeyed the pseudo-second-order kinetic model. The selective adsorption coefficient of Pb(II)-IIP for Pb(II)/Ni(II), Pb(II)/Cd(II), Pb(II)/Hg(II) and Pb(II)/Co(II) are 117.5, 1.42, 4.9 and 30.24, respectively. The spent Pb(II)-IIP could be reused at least five cycles, demonstrating its good practicability.
研究领域:
环境化学
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材料科学
·
分析化学
·
环境污染治理
·
功能高分子材料
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 45
·68680-68691
·
IF 5.19
Guo Lin-yu,He Xian,Hong Zhi-neng,Xu Ren-Kou
Lead (Pb) is one of the top metal pollutants worldwide, and its distribution between liquid and solid phases of soils is strongly controlled by its adsorption on minerals, organic matter, and their composites. This paper presented the effect of fulvic acid (FA) coexistence on the distribution of Pb(II) at the solid–liquid interface of four minerals, which provided reference for how to use humic substances to remove toxic Pb(II) in soils. The free Pb 2+ of suspensions, measured by Pb ion selective electrode, was used to characterize the complexation of FA with Pb 2+ at various pH. The adsorption isotherms of Pb(II) by montmorillonite, kaolinite, goethite, and gibbsite with and without FA were studied with batch experiments. Results indicated that the free Pb 2+ decreased and complexed Pb(II) increased with the increase of FA concentration in Pb(II)-FA solutions, whether the initial concentration of Pb(II) was 0.1 or 1 mM. Pb 2+ hydrolysis was low and the free Pb 2+ concentration in pure lead solution without FA was generally unchanged with increasing solution pH at pH < 6.0. But free Pb 2+ decreased with the increase of pH in the presence of FA, suggesting that the complexation ability of FA with Pb 2+ increased with the increase of solution pH. The adsorption of Pb(II) by the minerals without FA followed the order: montmorillonite > kaolinite ≈ goethite > gibbsite at pH5.0. The Pb(II) adsorption by montmorillonite and kaolinite significantly enhanced with 1 g/L FA, while significantly inhibited with 3 g/L FA at low initial Pb(II) concentration. However, the effect of FA on Pb(II) adsorption by montmorillonite was greater than that of kaolinite, which was mainly related to the crystal layer structure, adsorption area, and cation exchange capacity of the minerals. The Pb(II) adsorption by goethite and gibbsite was significantly enhanced by the addition of both 1 g/L and 3 g/L FA, and the enhancement was more evident in goethite system. The effect of FA on the distribution of Pb(II) between solid and liquid phases of the minerals was determined by the factors such as the initial concentration ratio of FA to Pb(II), the adsorption capacity of minerals for FA, and the number of soluble complexes of FA with Pb 2+ . Therefore, the distribution of FA between solid and liquid of four minerals affected the distribution of Pb(II) between solid and liquid phases of the minerals greatly. The results can provide an important reference for understanding the distribution of Pb(II) and the dynamics and mobility of active components in polluted soils.
研究领域:
环境科学
·
土壤学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jun Mao,Xianlin Lei,Xiyao Fu,Zhiping Chen,Hongxiang Zhu,Fei Xue,Zihan Yu,Lei Wang,Nannan Xia,Hui He
Extracting cellulose from agricultural residues and converting it into environmentally friendly adsorbents to solve the heavy metal contamination problem of groundwater and farmland is an effective strategy to achieve high-value utilization of agricultural residues. Herein, we propose a streamlined crosslinking strategy to fabricate a cellulose-based amphoteric hyperbranched adsorbent (MAHPA) in a controlled manner. The strategy involves synthesizing the amphoteric hyperbranched functional reagent first and then crosslinking it with microcrystalline cellulose (MCC). This approach simplifies the complexity of the multi-component cross-linking system, resulting in a conversion rate of reaction reagents exceeding 99 %. MAHPA, with a three-dimensional hyperbranched structure (degree of branching: 0.77), exhibits a high swelling rate (247.62 %) and high densities of carboxyl (7.05 mmol·g −1 ) and amino (8.27 mmol·g −1 ) groups. Moreover, the cellulose-hyperbranched double-network structure of MAHPA greatly enhances the intramolecular diffusion kinetics of heavy metal ions on MAHPA, enabling it to complete the removal of low concentrations of Cr(VI), As(V), Pb(II), and Cd(II) within 20 min. Interestingly, MAHPA demonstrates excellent synchronous capture performance for Cr(VI), As(V), Pb(II), and Cd(II) in groundwater at a velocity of 1.60 × 10 −2 m·s −1 . Meanwhile, applying MAHPA can realize the safe utilization of Cd-As contaminated soil. This work offers a general strategy for the structural design of cellulose-based hyperbranched adsorbent holding great promise as heavy metal contaminated groundwater and soil remediation field.
研究领域:
环境科学
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材料科学
·
农业科学
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产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.354
Dailian Zhu,Cunqi Qin,Shanshi Ao,Mei Wang,Minghua Wu,Yaohong lü,Kemei Pei,Huagang Ni,Peng Ye
Hypercrosslinked functionalized lignosulfonates (CLS) were prepared by Friedel–Crafts alkylation reaction. The structure of CLS without introducing any functional groups and the according adsorption behaviors of Pb(II) were characterized and studied, respectively. Due to increase of specific surface area and abundance exposure of binding sites, the maximum adsorption capacity of CLS was found to be as high as 74.45 mg/g, which was about seven times that of raw lignin. The results provide a new feasible synthesis method for preparing lignin-based materials with porous structures and promising application for the removal of heavy metal ions from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Weixia Yang,Yu Qiang,Mengshuo Du,Youyu Cao,Yingying Wang,Xiaoshuo Zhang,Tianli Yue,Jihong Huang,Zhonghong Li
The outstanding performance efficiency for the removal of heavy metal ions in solution is governed by various factors: (a) sufficient contact probability between heavy metal ions and the adsorbent, (b) convenient diffusion/accessibility of heavy metal ions to the surface and the interior of the adsorbent, and (c) abundant binding sites for heavy metal ions on the adsorbent. We designed an efficient MnFe 2 O 4 @MIL-53 @UiO-66 @MnO 2 adsorbent for Pb(II) and Cd(II) removal. The adsorbents were fabricated by merging self-propelled nanomotors, exploiting hierarchical structure, and using a metal-organic framework (MOF) composite to simultaneously meet the three requirements. The sufficient contact probability between Pb(II)/Cd(II) and MnFe 2 O 4 @MIL-53 @UiO-66 @MnO 2 was achieved via the self-propelled movement of MnFe 2 O 4 @MIL-53 @UiO-66 @MnO 2 which was induced by the catalytic decomposition of H 2 O 2 by MnO 2 . The convenient diffusion/accessibility of Pb(II)/Cd(II) on the surface and interior of MnFe 2 O 4 @MIL-53 @UiO-66 @MnO 2 was achieved by exploiting the properties of the hierarchical structure of MnFe 2 O 4 @MIL-53 @UiO-66 @MnO 2 . Abundant binding sites (-COOH) on MIL-53 and UiO-66 composites were present for the binding of the Pb(II)/Cd(II) ions to the adsorbent. The adsorption capacities of the nanomotor adsorbent for Pb(II) and Cd(II) were 1018 and 440.8 mg g –1 at 25 °C, respectively. Additionally, the complex formed of MnFe 2 O 4 and MIL-53 endowed the adsorbent with easy-recyclable properties under the influence of an external magnet. The nanomotors exhibit satisfactory removal performances for Pb(II) and Cd(II).
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2024
·
IF 4.7
Shaomin Liu,Zihan Wang,Mingyi He,Jinglin Zhu
The pollution of water bodies by heavy metal ions has recently become a global concern. In this experiment, a novel chelating resin, D851-6-AHHA, was synthesized by grafting 6-amino-N-hydroxyhexanamide (6-AHHA) onto the (-CH 2 N-(CH 2 COOH) 2 ) group of the D851 resin, which contained a hydroxamic acid group, amide group, and some carboxyl groups. This resin was developed for the purpose of removing heavy metal ions, such as Cr(III) and Pb(II), from water. The findings from static adsorption experiments demonstrated the remarkable adsorption effectiveness of D851-6-AHHA resin towards Cr(III) and Pb(II). Specifically, the maximum adsorption capacities for Cr(III) and Pb(II) were determined to be 91.50 mg/g and 611.92 mg/g, respectively. Furthermore, the adsorption kinetics of heavy metal ions by D851-6-AHHA resin followed the quasi-second-order kinetic model, while the adsorption isotherms followed the Langmuir model. These findings suggest that the adsorption process was characterized by monolayer chemisorption. The adsorption mechanism of D851-6-AHHA resin was comprehensively investigated through SEM, XRD, FT-IR, and XPS analyses, revealing a high efficiency of D851-6-AHHA resin in adsorbing Cr(III) and Pb(II). Specifically, the (-C(=O)NHOH) group exhibited a notable affinity for Cr(III) and Pb(II), forming stable multi-elemental ring structures with them. Additionally, dynamic adsorption experiments conducted using fixed-bed setups further validated the effectiveness of D851-6-AHHA resin in removing heavy metal ions from aqueous solutions. In conclusion, the experimental findings underscored the efficacy of D851-6-AHHA resin as a highly efficient adsorbent for remediating water bodies contaminated by heavy metal ions.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Xueyi Ren,Honglei Tian,Jianke Li,Yuhuan Zhang
Colorimetric detection methods are prosperous in the monitoring of contaminants in food and environmental matrices. However, the traditional single-channel color changes seriously restrict the enhancement of their sensitivity and facile applications. Herein, a Fe 3+ concentration-controlled dual-channel ratiometric colorimetric sensing platform for the sensitive detection of Pb 2+ was established. Generally, the low concentrations of Fe 3+ can trigger a typical absorption peak at 652 nm of the oxidized TMB (oxTMB). While high concentrations of Fe 3+ induce colorless-to-orange change due to the generation of biphenyl quinone with strong absorption peaks at 450 nm. Interestingly, the presence of Pb 2+ could convert Fe 3+ to Fe (3+x)+ by a displacement reaction, causing a blue-to-colorless change at low Fe 3+ concentrations or an orange-to-blue color change at high Fe 3+ concentrations. The latter dual-channel color variances corresponded to a more distinguished visual quantification of Pb 2+ compared to the former one-channel changes. As such, the Pb 2+ was detected over a range of 0.625-25 µM, with a low detection limit (LOD) of 70 nM. Additionally, by integrating smartphone optical equipment and color recognition software, an intelligent platform for the instant detection of Pb 2+ was established, with a LOD of 0.30 µM. In real samples detection, the developed smartphone sensing platform demonstrated excellent recovery rates (89.0±4.6% to 111.1±7.4%), comparable to the conventional UV-Vis spectroscopy. This work sheds light on fabrication dual-channel colorimetric detection methods for enhanced sensing performance and provides a rapid, sensitive, and intelligent platform for detecting small molecular hazards in the environment.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Mao-Ting Ding,Xian-Zhang Ling,F.F. Lin,L. Pei,C.G. Fan
A facile hydrothermal process was used for the synthesis of barium bismuthate nanoribbons. The nanoribbons were applied as the sensing materials for sensitive detection of Pb(II). The micromorphology and structure of the prepared products were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The suspension with barium bismuthate nanoribbons was cast on the surface of a glassy carbon electrode (GCE). The barium bismuthate nanoribbons modified GCE was used for the detection of Pb(II) using square wave anodic stripping voltammetry (SWASV) technique. The results show that the fabricated GCE exhibited a linear range of 0.001-2 mM with the limit of detection (LOD) of 0.13 μM. The barium bismuthate nanoribbons modified GCE has a promising potential in practical application for the detection of real samples with water and soil.
研究领域:
材料科学
·
环境科学
·
分析化学
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DOI
高影响因子
POLYMER BULLETIN
·
2026
·Vol. 83
·期 4
·194
·
IF 4
Wang Ting,Deng Hongyan,Touqeer Abbas,Li Wenbin,Fatima Mah Noor,Song Yuting
In this study, we successfully prepared carbonized/dextrinated-starch (CDS) modified with biological modifiers and investigated its adsorption properties. The morphological features of different modified starch (S) and CDS were characterized using multiple analytical techniques. Adsorption behaviors of CTC and Pb(II) were evaluated via batch experiments, and the effects of pH, temperature, and ionic strength on adsorption were compared. Morphological analyses confirmed successful surface modification by biological modifier, which altered the physicochemical properties of S and CDS. Both the Langmuir and Freundlich models were suitable for describing the adsorption process of CTC and Pb(II). The maximum adsorption capacities of CTC and Pb(II) on different modified materials were 14.06–25.82 mmol/kg and 388.70–807.52 mmol/kg, respectively, following the trends: SA-modified > AE-modified > unmodified material and modified CDS > modified S. Higher temperature and pH promoted the adsorption of CTC and Pb(II), and the process was an endothermic, spontaneous, and entropy- increasing reaction. The adsorption capacity for both CTC and Pb(II) initially increased and then decreased as the ionic strength increased. Moreover, the modified CDSs were practical and environmentally friendly for the treatment of CTC and Pb(II).
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产品关联
DOI
高影响因子
Nanoscale Advances
·
2018
·Vol. 1
·期 1
·389-394
·
IF 0
Linlin Zang,Ru Lin,Tianwei Dou,Lu wang,Jun Ma,Liguo Sun
Nanofibrous membranes have a high specific surface area and large porosity, which are beneficial for being used as adsorbents to remove heavy metal ions from water. In this work, electrospun nanofibers were wrapped with a hydrogel layer with a tunable thickness, which endowed the membrane with excellent superhydrophilic performance. Because of good water-retention properties and abundant functional groups originating from the hydrogel layer, as a static adsorbent, the maximum adsorption capacity of Pb(II) was up to 146.21 mg g−1 according to the Langmuir model. Meanwhile, the electrospun membrane also possessed water permeability as a flow-through membrane for dynamic adsorption, which was obviously different from traditional hydrogel adsorbents. As a result, the rejection ratio of Pb(II) can remain over 55% after running for 72 h under high pH conditions and at low initial ion concentrations. Apart from these, cycle operations confirmed the regeneration of the membrane, and competitive adsorption experiments illustrated the selective removal of Pb(II) in a mixed ion solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Shuai Tang,Lujian Lin,Xuesong Wang,Anxin Feng,Anqi Yu
Both heavy metals and microplastic pollutants are ubiquitous in the aquatic environment. The uptake of lead(II) ions from aqueous solutions onto aged nylon microplastics was investigated as a function of pH, contact time, temperature, supporting electrolyte concentration and fulvic acid concentration in batch studies. The effect of surface properties on the adsorption behavior of lead(II) was investigated with scanning electron microscope equipped with the energy dispersive X-ray spectroscope (SEM-EDAX), Fourier transform-infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and differential scanning calorimetric (DSC). The adsorption kinetics conformed to the pseudo-second order equation, Elovich equation and intraparticle diffusion model well. The experimental data of the adsorption process was fitted to the Langmuir and Freundlich adsorption isotherms and the parameters were estimated. The lead(II) uptake on aged nylon microplastics was spontaneous and endothermic in nature. The lead(II) adsorption was significantly dependent on the sodium chloride concentrations, initial solution pH and fulvic acid concentrations. Results of this study highlight the importance of surface carboxyl function group of aged nylon microplastics in controlling lead(II) adsorption.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Shuya Wang,Yipeng Huang,Linchun Zhang,Feiming Li,Fangyuan Lin,Yiru Wang,Xi Chen
Highly fluorescent methylammonium lead bromide (MAPbBr 3 ) perovskite could in situ grow in a sulfydryl functionalized mesoporous alumina film when methylammonium bromide (MABr) meets the sulfydryl-captured Pb(II). In this work, the extraction ability of the mesoporous alumina film towards Pb(II) was found to drastically enhanced after sulfydryl modification. Under the optimal conditions, the Pb(II) adsorption capacity of the sulfydryl functionalized film was 94.9 μg/g. With the strong extraction capability to Pb(II), fluorescence turn-on determination of Pb(II) was enabled by in-situ formation of MAPbBr 3 perovskite in the sulfydryl functionalized alumina film, and a limit of detection (LOD) as low as 5 × 10 −3 μg/mL was achieved. This method integrates the extraction and background-free determination of Pb(II), well addressed the low concentration determination issue and facilitating the whole analysis processes.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）