RSC Advances
·
2019
·Vol. 9
·期 23
·13065-13076
·
IF 3.049
Yuzhe Zhang,Tingting Bian,Da Xia,Dandan Wang,Yi Zhang,Xudong Zheng,Zhongyu Li
Although bio-materials are widely used for the adsorption of heavy metal ions, they have low specific surface area, slow adsorption rates, and poor selectivity. To overcome these limitations, in this study, we report a 3D-ordered macroporous ion-imprinted chitosan film (3DOM-IICF); the 3DOM-IICF coupled with a colloidal crystal template and ion imprinting (IIP) technology has been used to absorb copper ions (Cu(II)) present in water. Moreover, polystyrene (PS) micro-spheres and copper templates were added to form a three-dimensional ordered macroporous structure and ion-imprinted sites, respectively. Finally, the film was formed by drying. Adsorption experiments showed the removal of Cu(II) from the 3DOM-IICF in an aqueous solution. The 3DOM-IICF exhibited good adsorption performance under neutral conditions of pH = 7.0, and the adsorption efficiency was high. The maximum adsorption capacity of the 3DOM-IICF was 261.31 mg g−1. The adsorption processes were more consistent with the pseudo-second-order kinetic model and the Langmuir isotherm. The 3DOM-IICF exhibits superior selective adsorption of Cu(II). Moreover, the 3DOM-IICF could be regenerated multiple times, reused as an adsorbent and maintained high adsorption capacity. This kind of imprinted template method has important significance in the selective adsorption of pollutants in bio-materials and is worthy of in-depth research.
研究领域:
环境科学
·
材料科学
·
生物工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Shijie Cao,Quanquan Li,Hui Yun,Boyu Zhang,Zhixue Wang,Xiaowen Wang,Jing Bai,Xiaodong Wang,Yunhua Xu
Magnesium Hydride (MgH 2 ) is a promising hydrogen storage material but suffers from a high dehydrogenation temperature and sluggish sorption kinetics, which hinder its practical application. Accordingly, we report the use of a Cu-based metal-organic framework (HKUST-1) derived carbon material as a catalyst for optimizing the MgH 2 hydrogen storage performance. The MgH 2 containing 10 wt% HKUST-1 (denoted as MgH 2 -HKUST-1) exhibits a maximum dehydrogenation temperature of 50 °C, much lower than pure MgH 2 . Additionally, it demonstrates enhanced hydrogenation dynamics: it adsorbs 6.4 wt% H 2 within 240 s when heated to 350 °C, and even at 200 °C, it still captures 5.7 wt% H 2 in 60 min. Moreover, the dehydrogenation activation energy is 85.01 kJ per mole of H 2 , showing a marked reduction compared to pure MgH 2 . Furthermore, the excellent H 2 storage performance perhaps stems from the synergistic interaction of Cu 2+ /Cu + redox reactions, mechanochemical size effects, and in situ carbon scaffolding.
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DOI
高影响因子
WATER RESEARCH
·
2026
·
IF 12.8
Yifei Peng,Ruya Chen,Zhuoya Fang,Xinyuan Qiu,Qingzhen Wang,Huajun Feng,Jinming Luo,Yijing Xia
Sulfur-mediated electroreduction provides an attractive route for the concurrent decomplexation and recovery of persistent Cu(II)-EDTA; however, the intrinsic activity of sulfur sites remains poorly defined. Here, MoS 2 is employed as a model platform to delineate the role of sulfur functionalities by comparing the metallic 1T and semiconducting 2H phases. Studies reveal that sulfur sites promote a direct two-electron reduction pathway from Cu(II) to Cu(0). In the 1T phase, enhanced covalent Cu-S interactions lower the adsorption and activation barriers of Cu(II)-EDTA, while the elevated density of states at the Fermi level facilitates rapid electron transfer. Combined spectroscopic and theoretical analyses further show that sulfur vacancies and distorted octahedral coordination in 1T-MoS 2 modulate the electronic structure of sulfur sites, thereby promoting Cu extraction and lowering the decomplexation barrier. Consequently, 1T-MoS 2 achieves 99.4% Cu recovery with > 99% EDTA preservation, corresponding to an energy efficiency of 198.80 g kWh -1 (at an initial concentration of 100 mg L -1 ), outperforming 2H-MoS 2 (82.85%, 153.43 g kWh -1 ). This sulfur-mediated pathway concurrently enables stable operation over 30 cycles with high selectivity in complex matrices. Moreover, the strategy extends to other metal-EDTA systems ( e.g. , Pb(II), Cd(II)), highlighting the generality of sulfur-active electrocatalysts for coupling ligand preservation with efficient heavy-metal recovery.
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DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2018
·
IF 3.974
Xiaofeng Yi,Fuliang Sun,Zhenhua Han,Fuhao Han,Jiarui He,Minrui Ou,Junjie Gu,Xiaoping Xu
In this work, a novel sodium alginate (SA)/polyvinyl alcohol (PVA)/graphene oxide (GO) hydrogel microspheres were prepared by a simple method. Sodium alginate was physically crosslinked by Ca 2+ ; GO was encapsulated into the composite to strengthen the hydrogels; PVA played a significant role in well dispersing of GO in SA. The SA/PVA/GO (SPG) hydrogels were employed as an efficient adsorbent for removal of Cu (II) and U (VI) from aqueous solution. Batch experiments with the subject of the pH, initial metal ion concentration , competing ions and contact time were investigated. Structure characterization was successfully conducted by FTIR, SEM, EDX, BET and XPS. Furthermore, the sorption kinetics of Cu 2+ and UO 2 2+ followed pseudo-second order model and exhibited 3-stage intraparticle diffusion model. Equilibrium data were best described by Langmuir model and the obtained maximum adsorption capacities of SPG hydrogel microspheres for Cu 2+ and UO 2 2+ were 247.16 and 403.78 mg/g, respectively. The difference in adsorption capacity can be confirmed by the percentage of elements in EDX spectra and the intension of peak of elements in XPS spectra. The SPG sorbent exhibited excellent reusability after 5 adsorption-desorption cycles. All results suggested that the prepared adsorbents could be considered as effective and promising materials for removal of Cu (II) and U (VI) in wastewater.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Na Ma,Ke Li,Bo Xu,Huafeng Tian,Songbai Ma,Jinlong Li,Yuge Ouyang,Qian Liu,Dagang Liu,Rakesh Kumar
To solve the problem of the presence of heavy metals in water causing water pollution, the biodegradable film based on zein/polyvinyl alcohol (PVA) with the incorporation of nano-hydroxyapatite (nHAP) was fabricated through an electrospinning technique. The copper ion was taken as the representative of heavy metal ions in this study. The result showed that the incorporated nHAP nanoparticles were dispersed within the zein/PVA matrix, and strong hydrogen bonding interactions were formed between the filler and matrix, improving the hydrophobicity of the nanofibrous films and maintaining thermal stability. The adsorption mechanism was analyzed by fitting the adsorption process with pseudo-first-order model and pseudo-second-order model. Based on the ion exchange effect, electrostatic interaction, and complexation, the adsorption capacities of nanofibrous films for Cu(II) were significantly increased after adding nHAP. When the nHAP content was 20 wt.%, the Cu(II) adsorption capacity reached up to 23.86 mg/g, and the adsorption efficiency was 13.94% higher than that of neat zein/PVA nanofibers. This work suggests the potential of the electrospun zein/PVA/nHAP nanofibrous films as desirable eco-friendly materials in metal removal applications.
研究领域:
环境科学
·
材料科学
·
水处理
·
纳米技术
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产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
·
2025
·
IF 7.1
Tianhong Wang,Jiahui Xu,Anhong Cai,Jibo Xiao,Peng Wang,Min Zhao,Xianfeng Huang
Organic phosphonates detected frequently in water bodies pose severely environmental risks, and the cleavage of their C-P bonds to converse orthophosphate (PO 4 3- ) serves as a prerequisite step for achieving deep phosphorus elimination. Although the in situ generation of Cu(III) via Cu(II)/oxidant system for selective phosphonates degradation has been studied, the oxidation efficiency is constrained by sluggish Cu(II)/Cu(I) reduction, especially under acidic conditions. In this study, the introduction of UV irradiation accelerated the Cu(I)/Cu(II)/Cu(III) cycle in Cu(II)/peroxymonosulfate (PMS) process, enabling efficient and selective oxidation of 1,1-diphosphonic acid (HEDP, a typical phosphonate) into PO 4 3- across a wide pH range. UV-driven trace Cu(II)/PMS system can convert 90% of HEDP into PO 4 3- within 10 min at the pH range of 4-10, which was significantly higher than the conversion efficiency of HEDP by UV/PMS, Cu(II)/PMS and UV/Cu(II)/H 2 O 2 processes. The decomposition of HEDP was enhanced with increasing Cu(II) and PMS concentrations. Notably, mechanistic investigation revealed that Cu(III)-induced intramolecular electron transfer was the key contributor during the UV/Cu(II)/PMS-driven decomposition of HEDP into PO 4 3- . The experimental results of competitive ligands clearly suggested that the high selectivity of HEDP oxidation by UV/Cu(II)/PMS was closely related to the complexation of Cu(II) with HEDP. Additionally, although natural organic matter and inorganic anions to some extent affected HEDP degradation, UV-driven trace Cu(II)/PMS system still exhibited satisfactory results in treating HEDP in actual wastewater. This study proposes a strategy for efficient phosphonate removal under varying pH conditions, which provides new insights for practical wastewater treatment applications.
研究领域:
环境化学
·
水处理技术
·
高级氧化工艺
·
污染物降解
·
金属基氧化体系
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产品关联
DOI
高影响因子
HYDROGEOLOGY JOURNAL
·
2026
·
IF 2.3
Wang Huan,Zhang Zhenfei,Liang Haozhi,Liu Yongyi,Du Xinqiang
Clogging of porous media during artificial recharge is a technical bottleneck that limits the application of this technology. Sand column experiments were used to simulate the clogging of porous media to explore the effect of Cu(II) alone and in combination with suspended solids on hydraulic conductivity ( K ). The results indicate that at the end of experiments, the normalized hydraulic conductivity ( K ’) in experimental groups with Cu(II) concentrations of 1, 3, and 5 mg/L decreased to 0.634, 0.323, and 0.242, respectively. The degree of clogging increases with increasing Cu(II) concentration. At the end of recharge, the K ’ of the porous media in the 1 mg/L Cu(II), 100 NTU kaolin, and 100 NTU kaolin + 1 mg/L Cu(II) experimental groups decreased to 0.634, 0.233, and 0.016, respectively. The presence of Cu(II) and kaolin can individually cause clogging of porous media, but when Cu(II) coexists with kaolin, the degree of clogging significantly intensifies. The impact of Cu(II) and kaolin on porous media is not simply additive, but synergistic. The presence of Cu(II) changes the surface charge of suspended solids, increases particle size, and enhances migration, thereby significantly exacerbating clogging. This study systematically elucidates the clogging mechanism of suspended solids under the influence of Cu(II), thus providing a scientific basis for the design and management of artificial recharge systems.
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 6
·5511-5520
·
IF 1.5
Xingpu Qi,Jianzhong Qian,Tong Chen,Daoli Lu,Bin Chen
With a chemical and eco-friendly in situ reduction technique, an excellent Ag-Pd bimetallic nanoparticle (Ag-Pd)-based hybrid was successfully synthesized in this study. To determine copper(II) ions in water, this work employed differential pulse adsorptive stripping voltammetry (DPAdSV) and preconcentration methods. Furthermore, the sensor feasibility was studied with river and tap water as real specimens. The results revealed the potential of the proposed electrochemical sensor to be applied for the early testing of water quality based on its desirable behavior in Cu(II) determination in real specimens.
研究领域:
环境化学
·
电分析化学
·
水质监测
·
纳米材料
·
传感器与生物传感器
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DOI
高影响因子
CELLULOSE
·
2017
·Vol. 25
·期 1
·735-751
·
IF 3.417
Cui Sheng,Wang Xue,Zhang Xin,Xia Wei,Tang Xianglong,Lin Benlan,Wu Qi,Zhang Xin,Shen Xiaodong
In this paper, a MnFe 2 O 4 -Cellulose magnetic composite aerogel (MnCA) with high adsorption capacity was fabricated by in situ incorporating MnFe 2 O 4 to regenerated cellulose hydrogel matrix, followed by CO 2 supercritical drying. A green synthetic strategy was performed by using renewable cellulose materials, environmentally benign cellulose solvents and facile synthetic conditions. The results showed that the obtained magnetic cellulose aerogel had a continuous and tiered three dimensional network with interconnected fibrils of about 30 nm in width, which was similar to those of cellulose aerogel prepared from NaOH/urea solution via CO 2 supercritical drying. Meanwhile, they had high specific surface areas of 236–288 m 2 /g and total pore volume of 0.55–0.88 cm 3 /g. In addition, the hybrid aerogel showed superparamagnetism with maximum saturation magnetization reaching up to 18.53 emu/g. The magnetic nanocomposite aerogel could be used for biological and environmental applications. The adsorption test showed that MnCA had rapid adsorption rate and excellent adsorption ability of removing heavy metal ions in aqueous solution which could attain to 63.3 mg/g within 100 min. Moreover, all the composite aerogels exhibited good reusability and could be easily reused from the water after adsorption.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
吸附技术
·
化学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Ke Wang,Zhaobin Tian,Na Yin
Novel cross-flow disturbance of ceramic membrane was used for the first time to enhance the adsorption of highly toxic Cu(II) onto Zr-based metal–organic frameworks (Zr-MOFs). Effects of temperature and pH were investigated on the adsorption process of Cu(II) onto the MOFs using the jar test. The results showed that the MOFs can well adsorb Cu(II) (59.8 mg g–1) at a pH of 6 and a temperature of 40 °C. On the basis of this, the MOFs were then added into a novel cross-flow ceramic membrane filtration system. Effects of the operation temperature and membrane pore size were also investigated on the adsorption process. The results showed that Zr-MOFs adsorption of Cu(II) increased with temperature. The ceramic membrane with a pore size of 200 nm exhibited better Cu(II) removal and membrane flux than did the 50 nm membrane, as well as better kinetic data fit of the pseudo-second-order model. With the aid of cross-flow disturbance of ceramic membrane, the capacity was incredibly increased to 988.2 mg g–1 at a pH of 6, temperature of 40 °C, cross-flow velocity of 4.5 m s–1, and trans-membrane pressure of 0.05 MPa. The principal advantages of this method are a significant enhancement of adsorption onto the Zr-MOFs in the removal of Cu(II) and convenient application in the continuous treatment of heavy metal wastewater. This can be used as an effective method in continuous adsorptive removal of heavy metals from wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
·
吸附分离
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DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2017
·
IF 2.002
Xin Li,Dandan Zhang,Zihui Liu,Ying Xu,Dongfeng Wang
Organophosphorus pesticides are a class of the most important groups of insecticides and are widely applied to pest and plant diseases control in agriculture. The extensive application of organophosphorus pesticides can subsequently release organophosphorus pesticides into environment which may pose a seriously adverse impact to non-target organisms and humans. However, we could not ban organophosphorus pesticides at present as they are very efficient. Therefore, the new technique of degradation of organophosphorus pesticides must be studied. In this paper, a ternary copper Schiff base complex 2Cu(C 14 H 8 NO 3 Cl)(C 12 H 8 N 2 )·3CH 3 OH was synthesized and characterised by physico-chemical and spectroscopic methods. The degraded effects of 4 pesticides by the complex were investigated. The results showed that the degraded rates of every organophosphorus pesticide were increased. However, the effects of degradation were varied because of the different molecule structures of organophosphorus pesticides. Gas chromatography-mass spectrometry (GC–MS) and ion chromatography were used to analyze the degradation products by the complex, and then the catalytic mechanism of degradation was proposed. The study results suggest that the Schiff base copper complex, as a potent catalyzer, may find its applications in catalytic degradation area.
研究领域:
环境科学
·
农业化学
·
分析化学
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DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2016
·
IF 1.918
Xuefang Shang,Kui Ren,Jie Li,Wanli Li,Jiajia Fu,Xueli Zhang,Jinlian Zhang
A new copper(II) complex based on Schiff bases of 3-nitrosalicylaldehyde was synthesized and the crystal was also obtained fortunately. Its structure was well characterized by single-crystal X-ray diffraction and HRMS. The complex showed the strongest binding ability and high selectivity for hydrogen sulfide among other anions (AcO − , H 2 PO 4 − , F − , Cl − , Br − and I − ) at neutral pH in organic-aqueous solutions. The possible mechanism was the copper ion was released and combined with hydrogen sulfide after the anion was added. In addition, the further application of the sensor was applied to hela cells cytotoxicity. The above results indicated the copper(II) complex could be used as a sensor for the detection of HS − in the sample of environment, pharmacy, and etc. More importantly, the copper(II) complex also exhibited effective and wide antibacterial activity.
研究领域:
化学
·
生物学
·
医学
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DOI
高影响因子
危险品化学品经营许可证（带存储）