Journal of Central South University
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2024
·Vol. 30
·期 12
·3881-3896
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IF 3.7
Ma Xin,Duan Guang-yu,Huang Jia-qi,Yang Jia,Cao Zhan-fang,Wang Shuai
Heavy metal-contaminated water has become a great challenge for aquatic ecosystems. Herein, a versatile composite (IRC 748-GO) adsorbent was prepared by modifying graphene oxide (GO) with Amberlite IRC 748 resin. The batch and dynamic adsorption experiments of Cu 2+ on the IRC 748-GO composite were conducted, and the results showed that the novel adsorbents have a high adsorption capacity compared to the pristine GO. The adsorption process was consistent with the pseudo-second-order kinetic model and the equilibrium data were well fitted to the Langmuir isotherm model, and the maximum uptake of Cu 2+ was 127.22 mg/g. The adsorption mechanism was investigated using FT-IR, SEM, XPS, and adsorption isotherms, which revealed that the carboxyl groups in IRC 748-GO composite could effectively chelate Cu 2+ . Overall, the IRC 748-GO composite exhibited important advantages such as great specific surface area and stability, as well as high adsorption capacity, which provides broad application prospects for efficiently remediating wastewater containing heavy metals.
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
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Jinghui Wang,Chengyu Wang,Yuhang Zhang,Zhijun Luo,Lingling Qu
A heat-activated sodium percarbonate and persulfate (heat-SPC-PS) system was employed to treat Cu(II)-EDTA wastewater effectively. In this binary-oxidant system, SPC functioned as an oxidant, precipitant, and neutralizer throughout the treatment process. Under optimized conditions (SPC dosage: 28.3 mM, PS dosage: 47.0 mM, temperature: 80 °C), the system achieved a Cu removal efficiency of 95.9 % and rate constant of 0.391 min −1 after 10 minutes of treating a 3.14 mM of Cu(II)-EDTA solution. The Cu ions released from Cu(II)-EDTA were precipitated as a mixture of CuO, CuCO₃, and Cu₂(OH)₂CO₃. Additionally, SPC neutralized the H⁺ ions generated from PS hydrolysis, yielding a final solution pH of approximately 7.86. When followed by an alkali precipitation (AP) step at pH 11, the combined heat-SPC-PS + AP process further increased Cu removal efficiency from 95.9 % to 98.4 %, with precipitation occurring as CuO. Reactive oxygen species (ROS) generated by heat-SPC-PS system, including OH • , SO 4 •- , O 2 •- , and 1 O 2 were key contributors to the decomplexation of Cu(II)-EDTA. Moreover, the treatment substantially reduced phytotoxicity of Cu(II)-EDTA solutions. Lettuce grown with the treated effluent exhibited growth indices comparable to those irrigated with deionized water, demonstrating the potential of the heat-SPC-PS system for the safe and effective treatment of heavy metal complexes in wastewater.
研究领域:
环境科学
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化学工程
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生物学
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Lin Li,Kaiyun Yang,Zhan Ding,Chang Liu
Spodumene is often associated with quartz in ore deposits. Due to their similar physicochemical properties, achieving selective flotation separation using sodium oleate (NaOL) alone is challenging. This study proposes an innovative reagent scheme for selectively separating spodumene from quartz via flotation. The approach employs a Cu(II)/peroxymonosulfate (PMS) advanced oxidation process to activate the spodumene surface, which subsequently promotes the adsorption of NaOL as the collector. Single-mineral flotation tests demonstrated that under the conditions of pH 8, NaOL concentration of 8 × 10 −4 mol/L, Cu(II):PMS molar ratio of 3:1, and total Cu(II)/PMS concentration of 3 × 10 −4 mol/L, the recovery of spodumene reached 93.48%, while that of quartz was only 0.91%. Artificial mixed mineral flotation tests yielded a spodumene concentrate with a Li 2 O grade of 6.52% and a recovery of 83.46%. The activation mechanism was investigated using zeta potential, contact angle, Fourier transform infrared spectroscopy (FTIR), electron paramagnetic resonance (EPR), scanning electron microscopy with energy dispersive spectroscopy (SEM), and X-ray photoelectron spectroscopy (XPS) analyses. The results indicate that OH generated by the Cu(II)/PMS system is associated with cleaning of the spodumene surface and modification of its chemical environment, which in turn correlates with enhanced NaOL adsorption and increased surface hydrophobicity. These observations are consistent with the improved flotation separation of spodumene from quartz under the tested conditions. This study presents a promising activation strategy for the efficient flotation of spodumene.
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Inorganics
·
2026
·Vol. 14
·期 7
·183
·
IF 3.4
Xianguang Bai,Huiping Wang,Zebao Lu,Bin Li
A novel carbohydrazide-based ligand (L) and its binuclear Cu(II) complex were successfully synthesized and characterized. Structural analysis confirmed that the Cu(II) complex adopted a monoclinic crystal system with a distorted coordination configuration, in which the multidentate Schiff base ligand chelated and bridged two Cu(II) centers. The in vitro anti-tumor results revealed that the Cu(II) complex exhibited prominent cytotoxicity against five human cancer cell lines with much lower IC50values than the free ligand, copper chloride and cisplatin. Mechanistic studies demonstrated that the Cu(II) complex significantly increased intracellular ROS and MDA levels, decreased the GSH/GSSG ratio, and reduced ATP content, thereby disrupting cellular redox balance and bioenergetic metabolism. In addition, flow cytometry analysis verified that the complex effectively triggered tumor cell apoptosis. In contrast, free CuCl2showed almost no anticancer activity, indicating that the synergistic effect between the Schiff base ligand and copper ions contributed to the excellent anti-tumor performance. This work suggests that the prepared binuclear Cu(II) complex can serve as a promising candidate for developing metal-based anticancer agents.
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高影响因子
Journal of the Iranian Chemical Society
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2026
·Vol. 23
·期 8
·258
·
IF 2.4
Yu Haiyan,Zhang Li,Jia Yongpeng,Tian Ye
Two coordination polymers, CP1 and CP2, based on Cu(II) and Zn(II) ions, were synthesized and structurally characterized as fluorescent sensors for 1,10-phenanthroline, an important nitrogen-containing chelating agent widely used in coordination chemistry and industrial systems. Both materials exhibit good crystallinity, thermal stability, and intrinsic fluorescence. Their fluorescence sensing behaviors toward 1,10-phenanthroline were systematically investigated in aqueous media. CP1 and CP2 show high selectivity and sensitivity toward 1,10-phenanthroline, with Stern–Volmer constants of 1.11 × 10⁵ M⁻¹ and 6.95 × 10⁴ M⁻¹, and detection limits of 3.2 µM and 4.5 µM, respectively. In addition, both coordination polymers display good anti-interference ability and recyclability. Comparative studies reveal that the different sensing efficiencies of CP1 and CP2 are closely related to the distinct electronic properties of the Cu(II) and Zn(II) centers. Mechanistic investigations indicate that the fluorescence quenching mainly arises from coordination interactions between 1,10-phenanthroline and the metal centers. This work not only demonstrates the potential of coordination polymers as effective fluorescent sensors for phenanthroline detection, but also provides insight into the role of metal centers in regulating fluorescence sensing performance.
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2025
·
IF 2.4
Weimin Yan,Chengmin Hou
The composite particles (St/Fe3O4) were prepared using the co-precipitation method, whereby FeSO4 and FeCl3 were precipitated under alkaline conditions. The particles were composed of a starch matrix and Fe3O4. Subsequently, AA was grafted and cross-linked onto the composite particles (St/Fe3O4) via a one-step traditional free radical polymerization method, resulting in the formation of polymer-modified composite particles (St/Fe3O4-g-pAA). The initiator used in this process was 2,2’-Azobis(2-methylpropionitrile). The structures of St/Fe3O4 and St/Fe3O4-g-pAA were characterized by FTIR, thermogravimetric analysis and hysteresis loop. The impact of varying parameters, including the dosage of the St/Fe3O4 and St/Fe3O4-g-pAA adsorbents, the initial pH value of the Cu(II) solution, the initial Cu(II) concentration, the absorption time, and the temperature, on the adsorption behavior of Cu(II) was investigated. The results demonstrated that St/Fe3O4-g-pAA exhibited excellent adsorption performance for Cu(II), with a unit adsorption capacity of 123.92 mg/g and a maximum removal rate of 85% when the original concentration of the Cu(II) solution was 10. The experiment was conducted with 24 mg/L of Cu(II) at a pH of 7 at room temperature, with a mass of 1.5 mg of St/Fe3O4-g-pAA and an adsorption time of 3 h. The adsorption process followed the Langmuir model and the pseudo-second-order kinetic model, which was dominated by chemical adsorption and belonged to single-layer adsorption. The results of the renewable performance studies demonstrated that following eight cycles of adsorption, 92% of the initial adsorption effect was retained. It can therefore be concluded that the St/Fe3O4-g-pAA adsorbent material prepared in this work is an effective means of improving the adsorption rate of Cu(II).
研究领域:
环境科学
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材料科学
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化学工程
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高分子科学
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水处理技术
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高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2016
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IF 0.812
Liyuan Zhang,Yanfang Tai,Changpeng Lv,Chuanhu Wang
In this study, the water-soluble magnetic-multi-walled carbon nanotubes nanocomposites were fabricated via a facile and efficient approach and were characterized by X-ray diffraction, energy-dispersive X-ray, and transmission electron microscopy in detail. The nanocomposites could be employed as an effective adsorbent for removal of heavy metal ions, Cu(II) ions, from aqueous solution. It is noteworthy that the novel adsorbent displayed good water-dispersibility, rapid absorption rate, high absorption capacity, and convenient magnetic separation. Furthermore, the nanocomposites could be recovered and recycled for 10 consecutive trials without significant loss of its activity.
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高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Peifei Ding,Weifeng Song,Chao Wang,Zefeng Yu
Metakaolin-based geopolymer was investigated as absorbent to remove Cu(II) and Pb(II) from aqueous solution. The effects of adsorbent quantity, pH, contact time, and initial concentration of Cu(II)/Pb(II) in solutions were investigated. Furthermore, kinetics and isothermal adsorption were fitted by using equations. Kinetic adsorption of Cu(II) and Pb(II) fitted well to pseudo-second-order model. The isothermal adsorption of two heavy metals by the metakaolin-based geopolymer fitted well with Langmuir isotherm adsorption model. The maximum monolayer adsorption capacities were found to be 178.6 mg/g (2.79 mmol/g) and 312.5 mg/g (1.51 mmol/g) for Cu(II) and Pb(II), respectively. Results clearly showed that the adsorption of metal ions on geopolymer was accompanied by ion exchange. Low-cost, convenient, and effective adsorption of Cu(II) and Pb(II) make metakaolin-based geopolymers potential candidates for heavy metal removal in wastewater treatment.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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高影响因子
Desalination and Water Treatment
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2024
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IF 1
Rong Ping Chen,Lei Yu,Cao Xing Huang,Chen Huan Lai,Ting Ting Ma,Zi Shuai Zhang,Qiang Yong
Magnetic humic acid nanoparticles (MHA) was prepared via coprecipitation method. Adsorptive removal of methylene blue (MB) and Cu(II) by MHA in single-component and binary systems was studied, respectively. MHA showed highly removal efficiency to MB and Cu(II). The adsorptions of MB and Cu(II) on MHA were pH dependent with uptake dropping in acidic solutions. The adsorption mechanisms of MB and Cu(II) were also different. MB is adsorbed via two mechanisms: π–π interactions and ion exchanging, while Cu(II) only involves ion exchanging. It was also proved that MHA can selectively remove MB in acidic solutions. The adsorption equilibrium and kinetic study indicated that the adsorption of MHA was in agreement with Langmuir model and pseundo-second-order model, respectively. Furthermore, MHA could be easily regenerated and reused with almost no loss of adsorption capacity. Overall, MHA is an efficient and versatile adsorbent for Cu(II) and MB.
研究领域:
环境科学
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材料化学
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水处理
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吸附技术
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高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Shuai Tang,Lujian Lin,Xuesong Wang,Anxin Feng,Xue Feng,Jing Kong
The kinetics of Cu(II) and fulvic acid (FA) adsorption onto biochar has been investigated. The modified biochar samples derived from rice husks were characterized by scanning electron microscopy equipped with the energy-dispersive X-ray spectroscope and Fourier transform-infrared spectroscopy. Some characteristic parameters, such as specific surface area and zeta potential, were also determined. The optimum condition of Cu(II) adsorption was temperature of 308 K, 2 g L –1 of adsorbent dosage and 25 mg L –1 of FA concentration. The maximum removal efficiencies of Cu(II) ions and FA were almost 81% and 94%, respectively. The experimental data for adsorption of Cu(II) and FA on modified biochar was fitted by various adsorption kinetic models. The results showed that the pseudo-second-order equation was the best-suited model. Elovich equation was consistent with the experimental data suggested chemical interactions between modified biochar and adsorbates. Also, the intraparticle diffusion model fitted the experimental data well, indicating that the process of Cu(II) and FA adsorption was diffusion-controlled. In addition, complexation reactions between FA and Cu(II) promoted the adsorption of adsorbates on modified biochar. The relatively high desorption efficiency proves the strong regeneration capacity of modified biochar.
研究领域:
环境科学
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吸附技术
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水处理
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重金属去除
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材料表征
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高影响因子
Journal of Macromolecular Science Part B-Physics
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2016
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IF 0.62
Shaoping Yang,Shiyu Fu,Juanjuan Liu,Yiming Zhou
Hydrogels based on cellulose-graft-poly (acrylic acid) copolymers (C-g-AA) were synthesized by graft copolymerization in a phosphoric acid solvent. Fourier transform infrared (FT-IR) spectra confirmed the structure of the C-g-AA. The adsorption behaviors of the hydrogels for Cu(II) and Ni(II) were investigated. The results showed that their adsorption capacity increased as the initial concentrations of metal ions and the pH value of the solution increased. Freundlich and Langmuir isotherm models were employed to analyze the data from batch adsorption experiments. The results indicated that there were very good correlation coefficients for their linearized equations. The maximum adsorption amounts of the hydrogels for the metal ions, based on the Langmuir model, were 182 and 200 mg/g for Cu(II) and Ni(II), respectively. When the initial concentration of metal ions was 1000 mg/g the actual adsorption amounts of the hydrogels for Cu(II) and Ni(II) were 181 and 183 mg/g, respectively.
研究领域:
环境化学
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高分子科学
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水处理
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吸附技术
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高影响因子
Journal of Coatings Technology and Research
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2026
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IF 3.4
Xiao Dingwen,Zhang Huidong,Fang Yueguang,Wang Ziran,Xiu Lanling,Ye Junwei
Textiles are susceptible to microbial colonization due to prolonged accumulation of organic residues, such as sweat and skin secretions. These residues serve as nutrients for pathogenic growth, elevating the risk of infection in everyday environments. To mitigate, we developed a composite coating with persistent antibacterial properties by grafting polyethyleneimine (PEI) onto PET fabric surfaces followed by Cu(II) coordination. The functionalized fabrics (PET-PEI-Cu) exhibited exceptional antibacterial efficacy, achieving a bacteriostatic rate exceeding 99.99% against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus , significantly outperforming commercial PET fabrics. Furthermore, PET-PEI-Cu demonstrated excellent laundering durability, retaining its antibacterial efficacy even after 50 repeated washing cycles. With its sustained antimicrobial activity, this fabric holds promise for reducing bacterial contamination in hospital bedding. This could help mitigate cross-infection risks, reduce the disinfection burden on healthcare staff, and lower operational costs. This work provided a scalable strategy for preparing high-performance, long-lasting antibacterial textiles with broad application prospects in healthcare and public health. Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）