Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Jinpeng Wang,Ming Zhang,Runjuan Zhou,Jiyuan Li,Wei Zhao,Wenyuan Chen
This paper explored the effect of trace Cu(Ⅱ) (5 μM) on the degradation of Orange Ⅱ by Fe(Ⅱ)/Hydroxylamine (HA)/Persulfate (PS) system. The results showed that the addition of trace Cu(Ⅱ) not only improved the degradation efficiency of Fe(Ⅱ)/HA/PS system, but also broadened the pH range of Fe(Ⅱ)/HA/PS degradation Orange Ⅱ (2–10). Increasing the dosage of Fe(Ⅱ), Cu(Ⅱ) and PS will promote the degradation of Orange Ⅱ by the Cu(Ⅱ)/Fe(Ⅱ)/HA/PS system. However, the optimal dosage of HA is 0.03 mM. Lower or excessive HA dosage is not conducive to the degradation of Orange Ⅱ by the Cu(Ⅱ)/Fe(Ⅱ)/HA/PS system. Scavenger experiments show that SO 4 ·- is the main reactive oxygen species (ROS) in the Cu(Ⅱ)/Fe(Ⅱ)/HA/PS system. In both acidic and alkaline environments, Cu(Ⅰ) reduced by hydroxylamine can promote the conversion of Fe(Ⅲ) to Fe(Ⅱ). In acidic environment, Fe(Ⅱ) reduced by Cu(Ⅰ) is the reason why trace Cu(Ⅱ) can enhance the efficiency of Fe(Ⅱ)/HA/PS system to degrade Orange Ⅱ. However, in alkaline environment, Cu(I) reduced by hydroxylamine is the main participant in the production of SO 4 ·- by activating persulfate, which is also the main reason for broadening the applicable pH of Fe(Ⅱ)/HA/PS for Orange Ⅱ degradation to alkaline environment.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Saudi Chemical Society
·
2021
·
IF 3.932
Shuhua Cao,Fahui Li,Qian Xu,Meng Yao,Shun Wang,Yunjun Zhou,Xiaotong Cui,Ruolin Man,Kaoxue Li,Xishi Tai
A novel tetranuclear copper complex (TCC) has been successfully synthesized and characterized using high resolution mass spectrometry (HRMS), Fourier transform infrared spectroscopy (FTIR) and X-ray single crystal diffraction technique. TCC was capable of triggering by Glutathione (GSH) to produce Cu (Ⅰ), then the resulted Cu (Ⅰ) further converted the overexpression of endogenous H 2 O 2 into •OH, a highly cytotoxic reactive oxygen species (ROS), thereby killing the cancer cells. TCC showed high cytotoxicity to 4T1, MCF7, HepG2 cancer cells. Interestingly, the cytotoxicity of TCC to non-cancerous cells is much lower than that of cancer cells. Cell cycle experiments demonstrated that TCC was capable of arresting the cancer cell cycle in the G2/M phase. The apoptosis experiments shown that TCC could induce apoptosis rather than necrosis.
研究领域:
无机化学
·
材料科学
·
癌症研究
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Xiaolan Hu,Li Long,Tengjing Gong,Jiaqi Zhang,Jinpeng Yan,Yingwen Xue
In order to increase the adsorption properties of sodium alginate gel beads, a series of SA@PF-beads (sodium alginate-based beads with different amount of pore-forming agent) were prepared with calcium carbonate as the pore forming agent. The experimental results showed that the adsorption capacity of Cu(Ⅱ) increased by at least two times (from 13.69 mg/g to 33.88 mg/g, treated with SA@PF-0 and SA@PF-2.0, respectively) with proper amount of calcium carbonate added, which is economical and effective. In the experiment, SEM was used to measure the morphology of gel beads with different amount of pore-forming agent. FTIR and XPS were used to analyze the variation of functional groups and bond energies in the adsorption process. Adsorption isotherms and kinetics were conducted and showed that the adsorption process was consistent with Langmuir model and Elovich kinetic model. The maximum Langmuir adsorption 229.746 mg/g. The effects of pH, temperature and solid-liquid ratio on adsorption capacity were also investigated. In brief, calcium carbonate is an efficient and convenient pore-forming agent, which can be used to improve the adsorption properties of alginate gel materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Ruifeng Peng,Haibo He,Qian Wang,Xiaoxia Yan,Qiongwei Yu,Haixiao Qin,Yunyi Lei,Liqiang Luo,Yuqi Feng
In this study, we proposed a novel anti-aggregation of gold nanoparticles (AuNPs) strategy for colorimetric sensing of iodide ions (I − ) regulated by the redox reaction between the target ions and the ion cross-linking agent. Cu 2+ as interlinking ion can induce aggregation of arginine capped AuNPs (Arg-AuNPs) due to the formation of Arg-Cu 2+ -Arg analogous structure resulting from the chelation between Cu 2+ and arginine, with a clear color change of solution from red to blue. In the presence of I − , however, Cu 2+ would be readily reduced owing to the formation of CuI, AuNPs underwent a transformation from an aggregation to a dispersion state depending on the concentration of I − , leading color changes from blue to red. The corresponding color variation in the process of anti-aggregation of AuNPs can be monitored through UV–vis spectrophotometer or by the naked-eye, making quantitative analysis of I − feasible in a convenient colorimetric or visual way. The assay only took 5 min, showing high sensitivity with a lowest detectable concentration of 10 nM and excellent selectivity for I − over other anions tested, which was successfully applied for the detection of I − in drinking water and table salt samples.
研究领域:
分析化学
·
纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Lu Fan,Yingxi Wang,Ling Li,Jianggang Zhou
In this study, 2-amino-terephthalic acid was designed for construction of MOFs , and carbon quantum dots (CQDs) were designed to activate the Metal Organic Frameworks (MOFs) to be used as fluorescent sensor for selectively detection for Fe 3+ and Cu 2+ , enhancing the fluorescence to an “on” state by the hybrid with CQDs in the MOFs as activating agent; quenching the fluorescence to an “off” state by removal of CQDs through the metal competitive coordination substitution strategy. Using this strategy, the prepared CQDs/MOFs material can be used as a fluorescence “on-off” probe for highly sensitive detection of Fe 3+ and Cu 2+ in aqueous solution. It was found that the LOD of CQDs/MOFs for sensing Fe 3+ and Cu 2+ were 2.3 ppb and 1.3 ppb, respectively. It was proved that the CQDs/MOFs has little cytotoxicity to 4T-1 cells, indicating the potential application in the detection for Fe 3+ and Cu 2+ ions in cells.
研究领域:
化学
·
材料科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Wei Zhang,Ping Xiong,Qiao Li,Jiansheng Li,Jinyou Shen,Pengyu Zhu,Xiuyun Sun,Jingyu Lu,Ya Hu
EDTA-complexed heavy metals (EDTA-CHMs), one of the typical contaminants in industrial effluents , present challenges for wastewater purification because of their stability and high solubility over a wide pH range. Selective adsorption of various EDTA-CHMs coexisting in industrial wastewater is crucial for the recovery of heavy metal resources. Hence, investigating the competitive behavior and selective adsorption mechanisms of coexisting EDTA-CHMs during the effluent removal process is worthwhile. In this study, we chose Ferrihydrite (Fh) as the adsorbent and focused on the competitive adsorption behavior of two common EDTA-CHMs (EDTA-Cu(Ⅱ) and EDTA-Cr(Ⅲ)) on the Fh surface, as well as their removal mechanisms. For binary systems (EDTA-Cu(Ⅱ) and EDTA-Cr(Ⅲ)), the maximum adsorption capacity of Fh for EDTA-Cu(Ⅱ) was 17.32 mg/g, but because of the coexisting EDTA-Cu(Ⅱ), adsorption of EDTA-Cr(Ⅲ) by Fh was severely inhibited. In a competition experiment with binary contaminants of different EDTA complexes, Fh consistently exhibited stronger adsorption performance on EDTA-Cu(Ⅱ) when the ratio and addition order of EDTA-Cu(Ⅱ) and EDTA-Cr(Ⅲ) in the coexisting system was changed, and the valence state of the EDTA-CHMs was the key factor. The adsorption mechanism indicated that Fh could directly adsorb EDTA-CHMs through electrostatic interaction and surface complexation. The recycling rate of EDTA-Cu(Ⅱ) was still approximately 70.63% after five cycles of treatment with Na 2 SO 4 solution. This study provides new insights into the adsorption behavior of coexisting EDTA-CHMs on adsorbents and the selective removal of related pollutants.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yuting Hao,Hao Zhang,Xizhuang Yue,Zhen Zhao,Shuang Zhao
Herein, a novel, simple prepared and robust electrochemical sensor based on the copper-containing metal organic framework (CuBTC) has been developed for the determination of metformin (MET), a first-line drug for type 2 diabetes mellitus. CuBTC was synthesized by hydrothermal method. The morphology and structure of CuBTC were characterized by scanning electron microscopy, X-ray powder diffraction and infrared spectroscopy. The electrochemical behavior of MET at the glassy carbon electrode modified with CuBTC/Nafion mixture was deeply explored by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The electrochemical studies showed that CuBTC had excellent electrocatalytic ability towards the redox reaction of MET. Under the optimal conditions, the linear range of MET on the modified electrode was 0.5–280 μmol/L, and the detection limit was 0.19 μmol/L. Additionally, the proposed sensor exhibited good long-time stability, reproducibility and selectivity, which was successfully applied to detect MET in tablets, serum and urine samples.
研究领域:
分析化学
·
药物分析
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS BIOCHEMISTRY
·
2022
·
IF 4.885
Jinmao Ma,Dongrun Wang,Wei Zhang,Xiangyu Wang,Xia Ma,Minsheng Liu,Quanlin Zhao,Lincheng Zhou,Sanxiang Sun,Zhengfang Ye
The host–guest β-cyclodextrin has attracted much attention for potential application in various fields due to its low price, natural pores, and functionality. Herein, we report a method using 1,4-phenylene diisocyanate (PPDI) to fabricate β-cyclodextrin (CD)-modified poly(chloromethyl styrene) (PCMS) resin, namely, PCMS@PPDI-CD. β-Cyclodextrin was utilized to improve the adsorption performance of PCMS, which was then applied to anchor β-cyclodextrin powder. The product exhibits excellent renewability and availability due to the application of PCMS. The adsorption performance was fully exerted by the combination of β-cyclodextrin and PCMS. SEM mapping, FTIR, TG , BET, and XPS analyses were conducted to explore the morphological and structural properties of PCMS@PPDI-CD. Adsorption experiments show that PCMS@PPDI-CD removed 100 % of TC and 75 % of Cu(Ⅱ), and the maximum adsorption capacity for Cu(Ⅱ) and TC reached 187.6 and 266.4 mg g −1 , respectively. After recycling six times, the adsorption ability of Cu(Ⅱ) and TC still achieved excellent removal performance. In addition, the chelation of the lone N pair, the hydrophobicity of the cavity, H-bonding, complexation, n-π interaction, and porous structure showed the possible mechanism. We used computational formulas to simulate the adsorption state and found that the resin is theoretically feasible. Most importantly, we propose a novel application of PCMS@PPDI-CD. This work shows that the resulting PCMS@PPDI-CD is highly efficient and can be easily recycled, making it an attractive resin for adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Qianying Jia,Qinggong Jia,Shijie Zhu,Yufeng Zheng,Shaokang Guan
In the cardiovascular field, coating containing copper used to catalyze NO (nitric oxide) production on non-degradable metal surfaces have shown unparalleled expected performance, but there are few studies on biodegradable metal surfaces. Magnesium-based biodegradable metals have been applied in cardiovascular field in large-scale because of their excellent properties. In this study, the coating of copper loaded in silk fibroin is fabricated on biodegradable ZE21B alloy. Importantly, the different content of copper is set to investigate the effects of on the degradation performance and cell behavior of magnesium alloy. Through electrochemical and immersion experiments, it is found that high content of copper will accelerate the corrosion of magnesium alloy. The reason is the spontaneous micro-batteries between copper and magnesium with the different standard electrode potentials, that is, the galvanic corrosion accelerates the corrosion of magnesium alloy. Moreover, the coating formed through silk fibroin by the right amount copper not only have a protective effect on the ZE21B alloy substrate, but also promotes the adhesion and proliferation of endothelial cells in blood vessel micro-environment. The production of NO catalyzed by copper ions makes this trend more significant, and inhibits the excessive proliferation of smooth muscle cells. These findings can provide guidance for the amount of copper in the coating on the surface of biodegradable magnesium alloy used for cardiovascular stent purpose.
研究领域:
心血管工程
·
材料科学
·
生物医学工程
·
腐蚀科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Peng Xu,Jiaqi Feng,Na Li,Jiafan Yao,Guangchao Li,Baolin Hou
Zero-valent copper (Cu(0))-activated peroxodisulfate (PDS) generates reactive oxygen species (ROS) that effectively degrade azo dyes, but its application is limited by low Cu(I) conversion and narrow pH range. To overcome these barriers, this study introduced hydroxylamine (HA) to the Cu(0)/PDS system, boosting its oxidative capacity by accelerating the Cu(I)/Cu(II) redox cycle. Under the optimal conditions, the Cu(0)/PDS/HA system achieved a 78.5 % improvement in the degradation efficiency of orange II (AO7) within 10 min. UV-Vis spectroscopy, electron spin resonance (ESR) analysis, and scavenging experiments confirmed SO 4 •- and • OH as the primary reactive species in the Cu(0)/PDS/HA system, with minimal Cu(III) formation. A Systematic investigation of operational parameters (initial pH, Cu(0) dosage, HA concentration, and PDS concentration) and water matrix components (Cl - , NO 3 - , SO 4 2- , HCO 3 - , and humic acid) revealed their impact on AO7 removal. Furthermore, experiments in real water samples (tap, lake, and river water) validated the practicality of the Cu(0)/PDS/HA system, which was also demonstrated to effectively degrade other common pollutants. In conclusion, the present study provided an efficient strategy to bolster the oxidizing capacity of Cu(0)/PDS system, broadening its application potential for treating refractory organic pollutants.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Xiaolu Sun,Linhua Jiang,Ning Duan,Guangbin Zhu,Yanli Xu,Hao Jin,Yong Liu,Rong Zhang
Currently, domestic and foreign copper smelting waste acid mainly employ sulfuration method to realize the separation of Cu(Ⅱ) and As(Ⅲ), facing the problem of unreasonable sulfidizing agent dosage and sulfidation time. If excessive sulfidizing agent dosage or overly long sulfidation time, it will lead to human health threat and large hazardous waste volume. If insufficient sulfidizing agent dosage or overly short sulfidation time, it will cause the waste of copper resources and substandard treatment solution. In this paper, the competitive sulfuration mechanism of Cu(Ⅱ)/As(Ⅲ) solution ( C (As(Ⅲ)) = 10 g/L) with different Cu(Ⅱ) concentrations is revealed, i.e., when C (Cu(Ⅱ)) ≥7 g/L, the sulfidation sequence of Cu(Ⅱ) and As(Ⅲ) follows the solubility product constant (Ksp); when C (Cu(Ⅱ)) ≤6 g/L, the precipitation process of Cu(Ⅱ)/As(Ⅲ) is dominated by the liquid-phase mass-transfer mechanism (ion diffusion). The sulfide precipitation of Cu(Ⅱ)/As(Ⅲ) is a co-deposition process. With the increase of sulfidizing agent dosage ( S/Cu ratio) and sulfidation time ( t ), the Cu(Ⅱ) concentration gradually decreases to reach complete removal, while the further increase of S/Cu ratio and t leads to the decrease of copper content in the sulfide precipitates. Finally, the methods are demonstrated that detected accurately Cu(Ⅱ) and As(Ⅲ) concentrations in a rapid and non-destructive manner. This work not only provides a novel perspective on the efficient separation of Cu(Ⅱ)/As(Ⅲ) in copper smelting waste acid, but also opens a unique approach for direct and rapid detection of Cu(Ⅱ)/As(Ⅲ) concentration during the sulfuration process. Hence, this research is a guide for the regulating means ( S/Cu and t ) in the actual multi-step sulfuration process of copper smelting waste acid treatment and electrorefining solution purification .
研究领域:
冶金工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2019
·Vol. 9
·期 5
·255
·
IF 2.061
Niannian Yang,Runkai Wang,Pinhua Rao,Lili Yan,Wenqi Zhang,Jincheng Wang,Fei Chai
Calcium alginate (CA) beads as a green sorbent were easily fabricated in this study using sodium alginate crosslinking with CaCl2, and the crosslinking pathway was the exchange between the sodium ion of α-L-guluronic acid and Ca(II). The experimental study was conducted on Cu(II), Cd(II), Ni(II) and Zn(II) as the model heavy metals and the concentration was determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The characterization and sorption behavior of the CA beads were analyzed in detail via using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The adsorption experiments demonstrated that the CA beads exhibited a high removal efficiency for the selective adsorption of Cu(II) from the tetra metallic mixture solution and an excellent adsorption capacity of the heavy metals separately. According to the isotherm studies, the maximum uptake of Cu(II) could reach 107.53 mg/g, which was significantly higher than the other three heavy metal ions in the tetra metallic mixture solution. Additionally, after five cycles of adsorption and desorption, the uptake rate of Cu(II) on CA beads was maintained at 92%. According to the properties mentioned above, this material was assumed to be applied to reduce heavy metal pollution or recover valuable metals from waste water.Keywords:alginate beads;green sorbent;selective adsorption;heavy metals
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）