CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Binbin Shao,Yufan Chen,Deli Wu,Chaomeng Dai,Yalei Zhang
Structural Fe(II/III) hydroxides on the shell of nano-zerovalent iron (nZVI) are reactive sites for As(III) adsorption. Well-controlled structural Fe(II) hydroxides (SFH) is prepared to serve for As(III) removal in present study. With oxygen As(III) removal by SFH occurred efficiently but the removal efficiency was greatly reduced under anoxic conditions. The mineral transformation from SFH to lepidocrocite probably contributed to the robust removal efficiency of As(III). It is found that Cu(II), Cr(VI) and NO 2 − in aqueous solution could act as oxidants and promote the mineral transformation of SFH. A more efficient As(III) removal was therefore observed without oxygen. The removal efficiency decreased in the order O 2 /SFH ≈ Cu(II)/SFH > Cr(VI)/SFH ≈ NO 2 − /SFH at near neutral pH. The removal efficiency was less dependent on the initial pH for O 2 /SFH and Cu(II)/SFH systems than Cr(VI)/SFH and NO 2 − /SFH systems. Distribution of As on solid phases was able to describe the removal mechanism of As(III), and the results showed that the mineral transformation promoted the precipitation process and inhibited outer-sphere complexation, thus leading to enhanced As removal. With Cu(II), Cr(VI) and NO 2 − , the generation of oxidants from SFH transformation drove As(III) oxidation, and contributed to total As removal.
研究领域:
环境科学
·
化学
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DOI
高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2015
·
IF 0.991
Jianming Liu,Chao Wang,Zhenhu Xiong
A magnetic multiwalled carbon nanotubes (MWCNTs) nanocomposite was synthesized and was used as an adsorbent for removal of furazolidone (FZD) and Cu(II) from aqueous solutions. Influence of parameters on the adsorption capacity, including initial pH, contact time, and temperature, were investigated. Langmuir and Freundlich adsorption models were used for the mathematical description of adsorption equilibrium. Experimental data were analyzed by pseudo first order, pseudo second, and intraparticle diffusion order kinetic models. Thermodynamic parameters such as ΔH0, ΔS0, and ΔG0 calculated from adsorption process revealed that the adsorption process was spontaneous, exothermic, and a physical process in the experimental temperature range. Cu(II) had a strong suppression effect on FZD binding in the simultaneous adsorption and FZD preloading experiment. As for Cu(II) simultaneous adsorption and preloading, the impact of FZD on Cu(II) desorption was almost negligible. The practical application of magnetic MWCNTs and regeneration of magnetic MWCNTs for several cycles using hydrochloric acid and N,N-dimethylformamide were also investigated. Results of the study showed that the carbon nanotubes have good regeneration property and can be used as potential adsorbent for FZD and Cu(II) in water/wastewater.
研究领域:
环境科学
·
材料科学
·
水处理
·
吸附技术
·
纳米材料
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Guansheng Ma,Yuefeng Yan,Yuming Feng,Kaili Zhang,Boshi Gao,Jun Weng,Guangyu Qin,Seeram Ramakrishna,Xiaoxiao Huang
To cope with different environments of application, electromagnetic wave absorption (EWA) materials with multifunctionality have attracted a wide range of interests. And excessive heavy metal ions in aqueous solutions seriously affect people’s health and pose a major challenge to environmental safety. In this study, carbon microtube/carbon nanotube (CMT/CNT) composites were fabricated via carbonization and chemical vapor deposition (CVD) methods. The CNT wrapped with cobalt nanoparticles were grown in situ on the CMT which derived from kapok fiber. By varying the concentration of cobalt precursors, the EWA and Cu(II) adsorption performances of CMT/CNT can be efficiently tuned. Optimizing the cobalt content to 2 wt% resulted in a minimum reflection loss ( RL ) of −66.14 dB at a matching thickness of 1.91 mm, with an effective absorption bandwidth (EAB) of 5.35 GHz. The adsorption capacity of Cu(II) by the CMT/CNT composite can reach 102.01 mg/g when the initial Cu(II) concentration is 500 mg/L. This research not only shows great promise for applications in the field of EWA materials but also holds significant potential for heavy metal ion removal and as a catalyst carrier, among other areas.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Jin Qin,Shangshi Ye,Kai Yan,Jingdong Zhang
A visible light-driven photoelectrocatalytic system was constructed based on Bi/Bi 2 O 3 /TiO 2 nanotubes (NTs) to treat wastewater containing oxytetracycline and Cu 2+ mixed pollutants. The surface morphology , crystal phase, elemental composition , light absorption property and photoelectrochemical activity of the synthesized Bi/Bi 2 O 3 /TiO 2 NTs were investigated. The composite film , Bi/Bi 2 O 3 /TiO 2 NTs was used for the photoelectrochemical removal of oxytetracycline, and it had excellent visible light photoelectrocatalytic performance. Under optimal conditions, the composite film was simultaneously used to remove coexisting oxytetracycline-Cu 2+ . The study results show that the reduction of Cu 2+ on cathode was promoted by oxytetracycline while the degradation of oxytetracycline on photoanode was slightly suppressed by Cu 2+ . Also, possible photoelectrocatalytic degradation pathways for oxytetracycline-Cu 2+ were analyzed by HPLC-MS.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123082
·
IF 7.5
Zhe Xu,Jiantong Zhou,Chengfeng Liu,Weilan Zhen,Taicheng An
The peroxodisulfate (PDS)-based oxidation systems are promising for Cu(II) complex decomplexation owing to its capacity to harness the self-enhanced decomplexation (SED) effect of Cu(II) complexes. This phenomenon was conventionally attributed to liquid-phase autocatalysis via Fenton-like reactions between daughter Cu(II) species and PDS. However, this frequently adopted hypothesis is inconsistent with the actual catalytic activity of Cu(II) species and has been challenged by our preliminary results. Herein, we revisit the decomplexation of copper(II)-ethylenediaminetetraacetate (Cu(II)-EDTA) in UV/PDS system, with particular emphasis on correcting the catalytic behaviors of Cu species and clarifying the indispensable role of UV-irradiation in SED effect. Both acidic and alkaline conditions exhibit significant SED effect, but we reveal a pH-dependent SED mechanism that is fundamentally different from the prevailing liquid-phase autocatalysis mechanism. Under acidic conditions, Cu(II) complexes exhibit enhanced catalytic capacity with decreasing ligand coordination strength, primarily stemming from the activation of PDS by Cu(I) species produced via the irradiation-induced intramolecular charge transfer; In alkaline environments, only liberated Cu(II) substantially contribute to SED effect via spontaneous hydrolysis, forming nanostructured CuO after aging, which activates PDS through heterogeneous Fenton-like processes. While acidic conditions demonstrate faster decomplexation, alkaline-generated solid products facilitate multi-cycle treatment efficiency and alkaline conditions also exhibits stronger resistance to chloride. This work corrects the misinterpretation of SED mechanism in UV/PDS/Cu(II)-EDTA system, and provides a fundamental and accurate mechanistic basis for the efficient treatment of copper-containing organic wastewater by PDS-based processes.
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Feng Hu,Mengyi Liu,Jubo Zhang,Fangjiu He,Xiaowen Shi
This study presents an innovative electrochemical biosensor for the rapid and sensitive detection of Staphylococcus aureus ( S. aureus ), a significant foodborne pathogen. The biosensor is based on carbon paper modified with a Cu(Ⅱ)-crosslinked chitosan hydrogel film. Unlike conventional methods that rely on biomolecular recognition, this paper sensor detects S. aureus by measuring its unique respiration cycle, specifically its ability to reduce ferricyanide to ferrocyanide in the presence of mannitol. The chitosan hydrogel enhances the surface concentration of ferrocyanide and exhibits anti-fouling properties, while Cu(Ⅱ) crosslinking improves conductivity and diffusion. The biosensor demonstrates high sensitivity (0.082 μA/μM in I-t tests and 5.31 μA/μM in DPV tests) and low limits of detection (3.47 μM in I-t tests and 0.64 μM in DPV tests). It achieves a detection linear range of 10 0 to 10 5 CFU/mL with an LOD of 3.4 CFU/mL as well as excellent repeatability (RSD of 4.2%) and stability (retaining 83.4% of its initial signal after 15 days). Its performance in real food and wound samples confirms its high sensitivity and reasonable recovery rates, even in complex matrices. This research provides a strong foundation for the application of electrochemical biosensors in food safety monitoring and pathogen detection.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Shuangyan Zhang,Chun Hu,Qihui Wei,Xiangbing Ding,Meixiu Pan,Yuchen Zhang,Huiling Zhang,Yunjun Mei
Coffee grounds are converted to magnetic biochar via one-step co-ball milling. • Cu(II) uptake increases by ∼66% with rapid magnetic separation. • Oxygen-containing groups and Fe 3 O 4 synergistically drive adsorption. • Over 71% capacity is retained after five cycles. The increasing prominence of Cu(II) pollution in water bodies has driven the development of efficient and easily recoverable adsorbents. In this study, M-CBC was prepared from waste coffee grounds via pyrolysis and ball milling. Ball milling significantly increased the specific surface area and introduced abundant oxygen-containing functional groups. The loaded Fe 3 O 4 provided favorable superparamagnetism (saturation magnetization: 8.87 emu/g), enabling rapid magnetic separation. Batch adsorption experiments showed that under optimal conditions (pH 5.0, dosage 0.8 g/L, time 180 min), the actual adsorption capacity for Cu(II) reached 23.54 ± 0.23 mg/g, representing an approximately 66% enhancement compared to unmodified biochar. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, with a theoretical maximum adsorption capacity of 49.06 ± 1.36 mg/g at 25 °C, suggesting predominantly monolayer adsorption behavior on relatively homogeneous active sites. Thermodynamic analysis revealed that the adsorption process exhibited spontaneous and temperature-dependent characteristics, indicating the possible coexistence of multiple adsorption interactions. After five consecutive adsorption–desorption cycles, M-CBC retained 71.4% of its initial capacity, demonstrating excellent regeneration stability. Mechanistic analysis revealed that surface complexation with oxygen-containing groups played a dominant role, while the redox activity of Fe 3 O 4 provided synergistic enhancement. The combined effects of ball milling and Fe 3 O 4 loading effectively improved the adsorption performance, magnetic recoverability, and structural stability of the biochar. This work offers a resource-efficient approach to valorize waste coffee grounds and highlights the promising potential of M-CBC for treating Cu(II)-containing industrial wastewater due to its high efficiency and easy recoverability. Download: Download high-res image (142KB) Download: Download full-size image
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MOLECULAR PHARMACEUTICS
·
2026
·
IF 4.9
Mengxiao Fan,Xiang Wen,Jing Zhang,Ruibao Li,Xiangjun Chen,Xiaoning Song,Shengnan Li
Designing multifunctional nanotherapeutic platforms that integrate multiple therapeutic capabilities with enhanced tumor specificity and low systemic toxicity has emerged as a promising strategy for cancer therapy. Herein, we put forward a simple and clear route to construct multifunctional nanoparticles (NPs) integrating chemodynamic therapy (CDT), starvation therapy (ST), and photothermal therapy (PTT) by using polydopamine as a protective layer to coat Cu2+-doped zinc phosphate loaded with glucose oxidase (designated as Cu-ZnP@GOx/PDA/PEG NPs) for optimizing therapeutic efficacy. The obtained Cu-ZnP@GOx/PDA/PEG NPs utilize porous Cu2+-doped ZnP to provide sufficient space for efficient GOx loading, while the PDA shell coated on the surface acts as a “gatekeeper” to prevent enzyme leakage and provides photothermal conversion capabilities. When Cu-ZnP@GOx/PDA/PEG NPs accumulate at tumor sites, the slightly acidic tumor microenvironment triggers the degradation of Cu-ZnP@GOx/PDA/PEG NPs, thereby releasing loaded GOx and doped Cu2+. The released Cu2+ is reduced to Cu+ by glutathione (GSH), subsequently catalyzing H2O2 decomposition to generate highly cytotoxic hydroxyl radicals (•OH) for effective CDT. The released GOx can cut off glucose metabolism in tumor cells to realize ST, and the substances produced during the process of glucose oxidation can improve the microenvironment for better CDT. Under near-infrared irradiation, the generated heat by the photothermal effect of PDA can not only be applied for PTT but also enhance the catalytic efficiency of Fenton-like reactions and the enzymatic activity of GOx, achieving the goal of trimodal synergistic therapy of CDT/ST/PTT. Importantly, in vivo studies using tumor-bearing mice demonstrate that the combined therapy via Cu-ZnP@GOx/PDA/PEG NPs effectively suppresses tumor growth, and no obvious systemic toxicity can be observed. Taken together, the construction of Cu-ZnP@GOx/PDA/PEG NPs can provide a feasible strategy for a safe and efficient cancer therapy.
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PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2018
·
IF 2.795
Lelin Zeng,Yan Liu,Tao Yang,Yunquan Yang,Kewen Tang
Low selectivity and weak stability constantly restrict the industrial application of emulsion liquid membrane (ELM) for metal ions separation. This study proposed an improved ELM system, in which selectivity and stability were simultaneously enhanced for separation of Cd(II)/Cu(II) by adding citric acid and its salt as retardant and buffer difunctional additives. Initially, the separation coefficient ( β Cd/Cu ) in the blank experiment was only 1.15 in 15 min, which indicated that P507 exhibited a poor selectivity as a carrier. After adding citrate additives, the β Cd/Cu of the improved ELM system increased to more than 395.19 for two reasons. Firstly, the selectivity was enhanced by the selective chelation of citrate radicals on the Cu(II) ions, which were trapped in feed solution. Conversely, the Cd(II) ions were preferentially extracted by the P507 and then stripped into internal phase. Secondly, the stability was also improved, because the pH variation in the feed solution caused by the instability of membrane breakage was effectively controlled by the citrate additives as a pH buffer. Important variables in the citrate-enhanced ELM system including total citrate concentration, P507 concentration, dosage ratio of H 3 Cit to Na 3 Cit, H 2 SO 4 concentration, and metal ion concentration were studied, respectively. The scale-up continuous experiment was executed in a pilot-scale modified rotating disc contactor with β Cd/Cu of 859.61, which indicated that the citrate-enhanced ELM has considerable industrial application potential for efficient and steady separation of Cd(II)/Cu(II).
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Ruirui Wang,Hasnain Nawaz,Linbo Huang,Sheng Zhong,Shuang Wei,Bin He,Ruixia Liu,Suojiang Zhang
Electrochemical CO 2 reduction to highly selective ethylene is particularly desirable yet challenging. The competition between methane and ethylene in the CO 2 RR process underscores the critical necessity of designing the catalyst for ethylene by suppressing the methane pathway. Herein, we introduced controllable Cu(II)/Cu(I) interfaces by regulating the ratio of ionic liquids (ILs) and H 2 O. The Cu x O-IL4 catalyst with main CuO/Cu 2 O structure, exhibits a high Faraday efficiency toward C 2 H 4 (∼54 %) and less CH 4 (∼1 %) under 250 mA·cm −2 current density at −1.18 V (vs RHE). Experimental and theoretical analyses demonstrate that Cu(I) sites favor CO bridge formation, while Cu(II) sites preferentially generate CO atop on Cu x O-IL4 catalysts. The Cu(II)/Cu(I) interface in Cu x O-IL4 facilitates the generation of CO bridge intermediates, thereby lowering the energy barrier for *CO dimerization and also preventing *CO hydrogenation to CH 4 formation, thus enhancing the selectivity of CO 2 -to-ethylene conversion. The study provides a novel approach for precisely controlling CO adsorption configurations to enhance CO 2 RR selectivity toward high-value multicarbon products formation.
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xiaorong Gan,Huimin Zhao,Xie Quan,Yaobin Zhang
An ultrasensitive electrochemical sensor for Cu 2+ detection was first developed based on p-aminothiophenol (PATP) anchored on the surface of Au nanoparticle-decorated hydrogen-incorporated TiS 2 nanosheets (PATP/Au-H x TiS 2 ). In the synthesis process, the plane edges of H x TiS 2 nanosheets offered Au nanoparticles with incubation sites for the heterogeneous nucleation and growth. On the other hand, Au nanoparticles were not only served as an excellent electrical catalyst to facilitate electron transfer and as a substrate for loading PATP molecules by Au-S valent bonds, but also could effectively avoid the aggregation of H x TiS 2 nanosheets . Due to the synergetic effects from Au-H x TiS 2 for signal amplification, the as-formed electrochemical sensor exhibited highly sensitive and selective assaying of Cu 2+ with a detection limit of 90 pM (3σ) and a linear range from 0.2 nM to 5 μM, under optimal conditions. Its specificity was ascribed to the strong coordination interaction between Cu 2+ and N atoms of imine moieties in PATP after electrochemical oxidation .
研究领域:
分析化学
·
纳米科技
·
环境科学
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DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 8
·1532
·
IF 3.7
Keyu Chen,Yongming Wei,Kaihuai Duan
Highlights A novel PS-2-AB chelating resin was synthesized by grafting 2-aminobenzimidazole onto polystyrene. The resin showed Cu(II) and Ni(II) adsorption capacities of 125.04 mg/g and 157.44 mg/g, respectively. The resin maintained over 84% adsorption capacity after five regeneration cycles. To address heavy metal contamination in wastewater, this study developed a novel chelating resin (PS-2-AB) by grafting 2-aminobenzimidazole onto chloromethylated polystyrene. The resin was characterized using SEM, BET, FTIR, and XPS to confirm successful modification and analyze its structural properties. Batch adsorption tests were conducted to evaluate its removal performance for Cu(II) and Ni(II) ions. Under optimal conditions (pH 5.0–7.0, dosage: 1.0 g/L), PS-2-AB achieved maximum adsorption capacities of 125.04 mg/g for Cu(II) and 157.44 mg/g for Ni(II), which are significantly higher than those of the commercial resin D113 (44.68 mg/g for Cu(II) and 25.17 mg/g for Ni(II)) under the same conditions. Adsorption kinetics followed the pseudo-second-order model, indicating chemisorption-dominated behavior, while equilibrium data fit the Langmuir model, suggesting monolayer adsorption. Thermodynamic parameters confirmed a spontaneous and endothermic process. After five regeneration cycles, PS-2-AB retained approximately 87% (Cu) and 89% (Ni) of its original capacity, demonstrating good reusability. These results indicate that PS-2-AB exhibits markedly better adsorption performance than D113, making it a promising and cost-effective adsorbent for the efficient removal of Cu(II) and Ni(II) from aqueous media.
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PubMed
高影响因子
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