CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xuan Zhou,Can Jin,Guifeng Liu,Guomin Wu,Shuping Huo,Zhenwu Kong
With the increasing concern in sustainable development and environmental governance, the biomass-based magnetic materials containing sufficient active sites and regular structure can be regarded as the high-performance adsorbents for removal of heavy metal pollutants from wastewater. In this study, we reported the tunable covalent binding of lignin onto amine-functionalized magnetic nanoparticles (AMNP) using cyanuric chloride as a chemoselective cross-linker. The chemical structures, morphologies, and magnetic properties of the synthesized lignin-based magnetic adsorbents (L1@MNP and L2@MNP) were comprehensively characterized. Batch adsorption experiments were conducted to investigate various effecting factors, including pH, contact time, solution concentration and temperature. With the higher component ratio of AMNP/lignin, L1@MNP displayed higher adsorption affinity ( q max = 111.23 mg/g) and selectivity towards Pb(II) than L2@MNP ( q max = 81.97 mg/g). The adsorption kinetics agreed well with the pseudo-second-order kinetic model, and the thermodynamic adsorption behaviors were found to be an endothermic and spontaneous process. In addition, the presence of magnetic cores in the network facilitated the fast recovery of both two magnetic adsorbents after the adsorption process, owing to the good superparamagnetic properties for L1@MNP (40.06 emu/g) and L2@MNP (26.95 emu/g). Furthermore, the core–shell magnetic adsorbents also showed superior stability even in an acidic solution, of which the removal efficiency could well maintain over 85% after 5 cycles. This work provides a facile strategy for the design and synthesis of lignin-based adsorbents with flexible nanoparticles as a building block for the potential application prospects in Pb(II) removal from wastewater.
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2012
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IF 0.887
Dajian Huang,Wenbo Wang,Yuru Kang,Aiqin Wang
A series of granular pH-sensitive semi-interpenetrating polymer network (semi-IPN) hydrogels based on chitosan (CTS), acrylic acid (AA) and gelatine (GE) were utilized for the adsorption and recycle of Pb(II) from aqueous solutions. The composite hydrogels have been characterized by FT-IR and TGA. The effects of contact time, pH value and initial Pb(II) concentration on the adsorption were investigated. Results indicated that the adsorption capacity of the hydrogel increased with increasing pH value and initial Pb(II) concentration, and a pH-sensitive adsorption characteristic was presented. The adsorption rate of the semi-IPN hydrogels on Pb(II) is fast with an adsorption rate constant of 14.9790 mg/(g·s), and adsorption equilibrium could be reached within 10 min. The adsorption isotherms of the hydrogels for Pb(II) could be described well by the Langmuir equation, rather than the Freundlich equation. The as-prepared hydrogels showed good reusability with 0.05 mol/l HNO3 solutions as the desorbing agent and 0.1 mol/l NaOH solutions as the regeneration agent, respectively. After five consecutive adsorption-desorption processes, the semi-IPN hydrogel with 20 wt% GE may reach 85.26% of its initial adsorption capacity. In addition, the adsorbed Pb(II) can be quantitatively recovered by simply eluting the hydrogel with dilute HNO3 solution, and a recovery ratio of 89.27% was reached for the semi-IPN hydrogel. The satisfactory adsorption amount is mainly derived from the chelating of functional groups (i.e. –COO− and –NH2) with Pb(II) ions. The hydrogel adsorbents exhibited excellent affinity for Pb(II), and can be applied to treat wastewater containing heavy metal ion and simultaneously recover the valuable metal sources.
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Toxics
·
2022
·Vol. 10
·期 9
·489
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IF 4.472
Chunlin He,Yun Liu,Chunhui Zheng,Yanming Jiang,Yan Liao,Jiaxin Huang,Toyohisa Fujita,Yuezhou Wei,Shaojian Ma
Utilising waste amine-oxime (WAO) resin through microwave semi-carbonization, a carbon adsorbent (CA) was obtained to remove Pb(II). After microwave treatment, the pore size of the skeleton structure, three-dimensional porous network, and lamellar pore structure of WAO was improved. The distribution coefficient (Kd) of Pb(II) onto CA is 620 mL/g, and the maximum adsorption capacity of Pb(II) is 82.67 mg/g after 20 min of WAO microwave treatment. The adsorption kinetics and adsorption isotherms conform to the quasi-second-order kinetic equation and Langmuir adsorption isotherm model, respectively. The surface of MT-WAO is negatively charged and the adsorption mechanism is mainly electrostatic interaction. Pb(II) elution in hydrochloric acid solution is more than 98%, and its recovery is high at 318 K and for 1 h.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xinglu Jiang,Yiwu. Qin,Jun Zhou,Wenjin Chen,Beibei Xie,Hailun Zhou,Kangjing Li,Chunyun Liang,Cong Liu,Ao Long,Shufang Zhuo,Yigeng Liu,Fengyuan Zhou
As exposed to heavy metals, they can bind to biomacromolecules and damage these molecular structures, thereby seriously threatening human's health，for example. Hence, to study the mechanism of interaction between heavy metals and biomacromolecules plays an important role in protecting human health from heavy metal hazards. Here, ssDNA and E. coli lysates were severed as biomacromolecules to analyze their molecular structure changes as exposed to gold (Au) ion and other heavy metal ions, such as Pb 2 + , Cd 2+ , Cr 2+ and Hg 2+ . Gold nanoparticles coated by E. coli lysates (ECL-Au NPs) have been produced in the process of reducing the toxicity of Au(III) by E. coli lysates. As simultaneously exposed to heavy metal ions and sunlight, Au(III) ion can be generated from ECL-Au NPs to rapidly cleave DNA through cycling between Au(0) and Au(III). Meanwhile, the electron transfers also occur in the biomacromolecules from E. coli lysates, and it must cause their structure destruction as well. In conclusion, as exposed to multiple heavy metals, sunlight can enhance the synergetic damage of biomacromolecules by heavy metals. This study provides not only a new tool for DNA cleavage, but also a new mechanism of DNA and proteins damage caused by heavy metal pollution.
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BIOLOGICAL TRACE ELEMENT RESEARCH
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2024
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IF 3.4
Wu Shihao,Zhao Peng,Wang Aihua,Dong Linpei,Wu Xiaojun,Wang Jifen,Zhang Yunfeng
Monochromatic excitation X-ray fluorescence (ME-XRF) spectrometry emerges as a novel technique in trace element analysis, distinguished by its simplicity, rapidity, and efficiency. Its application in forensic toxicology has grown significantly for identifying toxic trace metals in biological samples. This study further expands its utility by developing a method for the rapid determination of arsenic (As), mercury (Hg), thallium (Tl), and lead (Pb) in hair samples. Calibration curves were established using analytical reference samples, and optimal detection conditions were determined and validated. The LODs for As, Hg, Tl, and Pb were 0.03, 0.03, 0.03, and 0.05 μg g −1 , respectively. Method precision was evaluated through seven parallel analyses of samples within the concentration range of 0.27 to 20.051 μg g⁻ 1 , with relative standard deviations (RSDs) consistently below 10%. The feasibility of the ME-XRF technique for forensic toxicology analysis was validated through the analysis of authentic poisoned hair samples collected from the animal experiment.
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PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 6
·1-19
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IF 3
Xing Yun,Liu Wei,Li Yuqing,Yang Miao,Su Xinyi
The novel adsorbent of KMnO 4 -modified spent coffee grounds (KMnO 4 -SCGS) was successfully synthesized for the adsorption of Pb(II). Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and other characterization measurements were employed to evaluate the physical and chemical properties of KMnO 4 -SCGS. The results demonstrated that the adsorption behavior of Pb(II) was best fitted by the pseudo-second-order, Ritchie, and Langmuir isothermal models, indicating that the surface of KMnO 4 -SCGS was composed of homogeneous adsorption. The surface complexes with manganese oxide (MnO x ) and oxygen-containing functional groups, along with electrostatic interaction, physical adsorption, and ion exchange, played significant roles in the adsorption of Pb(II). The Langmuir maximum adsorption capacity for Pb(II) was 203.8 mg/g for KMnO 4 -SCGS, which was approximately 11.73 times higher than that of SCGS, and it remained over 80% after five cycles. Finally, the Box-Behnken design was utilized to optimize the results. Therefore, the modification of spent coffee grounds by KMnO 4 is a feasible approach for the adsorption of Pb(II). Graphic
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yiwen Zhang,Anwen Li,Tian Tian,Xunyong Zhou,Yutong Liu,Min Zhao,Longshan Zhao
A kind of new magnetic oyster shell (OS) composite (OS-Fe 3 O 4 @SiO 2 @NH 2 @PEI) was synthesized and used as an adsorbent to remove carmine (CM), sunset yellow (SY) and Pb (II) from water. Firstly, Fe 3 O 4 magnetic nanoparticles were introduced on the surface of waste oyster shell powder, then amino silanization was used to improve the stability of the material, and finally polyethylenimide (PEI) was grafted by Schiff base reaction. The composite was characterized by FT-IR, SEM, EDS, XPS , VSM, BET, TEM and zeta potential . The effects of adsorbent dosage and initial solution pH on the three samples were investigated by adsorption experiments. The adsorption kinetics and isotherms were investigated in depth under the best experimental conditions. The composite adsorbent not only selectively removed anionic azo dyes, but also had good recycling. In addition, OS-Fe 3 O 4 @SiO 2 @NH 2 @PEI still had good performance in mixed samples. These results indicated that OS-Fe 3 O 4 @SiO 2 @NH 2 @PEI was successfully used for the removal of a wide range of anionic dyes and heavy metal ions from the environment, and provided a new strategy for recycling waste.
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PubMed
高影响因子
Desalination and Water Treatment
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2025
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IF 1
Jingyi Chen,Xiaoxue Zhang,Junsheng Liu,Shan Jiang,Chunyu Ji,Jie Zhang
A series of novel polyethyleneimine/graphene oxide (PEI@GO) membranes were prepared and their adsorptions for heavy metal ions in mixed solutions were examined. It was found that they had good sorption performances for Pb(II), Cu(II), and Zn(II) in water. Their adsorptions for Pb(II), Cu(II), and Zn(II) obeyed the first-order kinetic modeling, dominating a physical style. Meanwhile, the fitting of intra-particle diffusion showed that Pb(II) and Cu(II) did not conform to the intra-particle diffusion stage, whereas Zn(II) did. Moreover, it was confirmed that the sorption of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) followed the Langmuir isotherm modeling, and the maximal values could reach 79.6 mg/g for Pb(II), 35.01 mg/g for Cu(II), and 32.27 mg/g for Zn(II), respectively. The calculation of thermodynamic parameters indicated that these adsorptions were spontaneous and endothermic processes. Further, the investigation of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) in ternary mixed systems evidenced that Zn(II) can be preferentially removed via step-by-step mode. In addition, the exploration of sorption mechanism using XPS and FTIR analyses showed that ligand interactions were involved in the adsorptive removal of Pb(II), Cu(II), and Zn(II). This study discloses that PEI@GO membranes are promising adsorbents for the removal of heavy metal ions from water.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Dongfang Wang,Jie Wu,Ruohan Li,Xianghai Kong,Pan Zhao,Yanping Zhu,Zerong Song,Jinjing Xu,Ziyu You,Yuhao Wang,Qingchuan Wu,Dongqing Cai
White pollution, excessive heavy metals, and fertilizer leaching have become key issues restricting the development of agriculture. In this work, we prepared multifunctional starch mulch film (SMF/MAP/FeS) by loading ferrous sulfide (FeS) and monoammonium phosphate (MAP) onto commercial starch mulch film using poly(vinyl alcohol) for bonding. The removal efficiencies of Pb(II)/Cr(VI) for SMF/MAP/FeS could reach 97% and 93% in the aqueous solution. The adsorption isotherm, thermodynamic, and kinetics studies indicated that the adsorption process was an endothermic multimolecular-layer chemisorption. The main removal mechanisms for Pb(II)/Cr(VI) of SMF/MAP/FeS were precipitation and redox reactions. In addition, SMF/MAP/FeS not only possessed great thermal insulation and moisturizing properties but also could realize the slow release of NH4+. Furthermore, the maximum release rate of NH4+ for SMF/MAP/FeS could reach 93.4% during Pb(II)/Cr(VI) removal. At the same time, SMF/MAP/FeS has a good degradability at 50 d. A pot experiment indicated that SMF/MAP/FeS had a detoxifying effect on the Pb(II)/Cr(VI)-contaminated soil to promote the growth of pakchoi. Therefore, this study not only solves the problem of plastic and heavy metal pollution but also realizes the slow release of nutrients.
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PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Zhanqi Liu,Manyu Zhang,Shuo Wang,Hui Qiu,Yaran Song,Qina Sun,Tifeng Jiao,Qingrui Zhang
Heavy metal contamination in industrial wastewater, particularly lead (Pb(II)), poses significant environmental and health challenges. Conventional membrane technologies, like nanofiltration and ultrafiltration, struggle with selectivity and separation recovery in complex wastewater streams. To address this, we present an advanced metal-phenolic network (MPN) membrane that leverages the tunable coordination chemistry of Tannic Acid (TA) and metal complexes to address these limitations. The TA-MPN membrane demonstrates exceptional performance, achieving 6–15 times higher selectivity for Pb(II) than commercial polyamide membranes, even in the presence of competing ions such as Cd(II), Zn(II), Cr(VI) and Ni(II). In electroplating wastewater applications, the membrane reduces Pb(II) levels to below 0.1 mg/L with a capacity of 80 L/m 2 and removal efficiency exceeding 95 %, meeting stringent GB21900-2008 standards. Furthermore, the membrane exhibits outstanding regenerability, maintaining consistent performance over 10 regeneration cycles using extremely low doses of 0.1 % HCl. An economic analysis reveals a preparation cost of 22.6 USD/m 2 and a treatment cost of 0.227 USD per ton of wastewater, demonstrating its cost-effectiveness. The findings establish the TA-MPN membrane as a scientifically robust solution for selective and cost-effective Pb(II) remediation and recovery, effectively addressing the limitations of conventional membranes while advancing scalable and sustainable technologies for heavy metal treatment.
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高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Mingyue Piao,Jing Zhang,Huishi Du,Hongxue Du,Honghui Teng
The use of three-dimensional (3D) electrochemical oxidation has become a popular method for treating water pollutants. In this study, the degradation of real wastewater discharged by the chemical industry was conducted using Pb loaded biochar (Pb/BC) as a particle electrode. The properties of Pb/BC were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller. The impact of various factors, including Pb loading, pH, dosage of Pb/BC, and working voltage, on chemical oxygen demand (COD) elimination were examined, and the best results were obtained on pH 7 and working voltage of 14 V, with 25 g/L Pb/BC (8% Pb loaded on BC) added in 3D reaction system. The degradation process was well fitted with the first-order kinetic. COD removal efficiency was 67.60% after 90 min reaction with only 6.21 kW·h/kg COD of energy consumption. The presence of tert-butanol had a significant impact on decreasing the efficiency of COD removal, suggesting that the hydroxyl radicals produced during the reaction were the primary means of degrading COD, rather than direct electro-oxidation. Toxic results indicated that the treated wastewater was less toxic than the original water. The use of Pb/BC may have practical applications in the treatment of actual chemical wastewater.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ying Jiang,Wanting Wang,Guichun Luo,Yungui Li,Yapeng Dong,Xiuyuan Zuo,Hai Liang
ZIF-8-decorated biochar hold great potential for heavy metal contaminated wastewater remediation due to the superior adsorption performance of ZIF-8. However, the inevitable blockage of nature pore during preparation restricted the enhancement of adsorption performance and further practical applications. Herein, a novel Zn(NO 3 ) 2 activation-combined in-situ growth strategy was established for porous ZIF-8-decorated biochar (AI-BC@ZIF-8) preparation, this strategy enables the synergistic promotion of porous structure and distribution of ZIF-8 for adsorbent. The AI-BC@ZIF-8 exhibited an excellent adsorption capacity of 249.63 mg/g for Pb, achieving removal efficiency of 99.8% for conventional 50 mg/L Pb-containing wastewater. The adsorption process conforms to the pseudo-second-order kinetic model and the Langmuir isothermal model, indicating the monolayer chemical adsorption mechanism. The results of FTIR, BET and XPS analyses indicate that the adsorption mechanism of AI-BC@ZIF-8 is electrostatic interaction, N-coordination, precipitation, ion-exchange and pore-filling. Overall, this adsorbent demonstrates outstanding adsorption performance, showing its great potential in efficient and low-cost water purification. This work provides a viable strategy for the synthesis of highly porous and efficient ZIF-8-decorated biochar for heavy metal removal from wastewater.
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