INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 19
·11202
·
IF 6.208
Yuting Xiao,Ruixiao Luo,Yansong Ji,Shiwei Li,Hongmei Hu,Xiaoning Zhang
Sericin is a by-product of the silk industry. Its recycling contributes to environmental protection and the sustainable development of the cocoon silk industry. In this paper, on the basis of realizing sericin enrichment in solution, the Cu(II) adsorption capacities of sericin-derived carbon (SC), prepared at different pyrolysis temperatures, were studied. SC was characterized using scanning electron microscopy (SEM) and the zeta potential. The effects of the initial concentration of Cu(II), pH, adsorption temperature, and contact time on the adsorption process were evaluated, followed by an investigation of the mechanism of Cu(II) adsorption by SC. The results showed that SC has a porous structure that provides sites for Cu(II) adsorption. The maximum adsorption capacity of Cu(II) onto SC1050, 17.97 mg/g, was obtained at an adsorption temperature of 35 °C and a pH of 5.5. In addition, the pseudo-second-order kinetic model and Langmuir isotherm model correctly described the adsorption process of Cu(II) onto SC1050. Therefore, SC can act as a potential adsorbent for removing Cu(II) from water. This study helps promote the effective use of cocoon silk resources.Keywords:silk sericin;sericin-derived carbon;copper(II);adsorption
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Applied Spectroscopy
·
2014
·Vol. 81
·期 5
·807-811
·
IF 0.514
Liu Y.,Fan J.,Ma W.,Fu Ch.
An aqueous two-phase system of acetone and (NH 4 ) 2 SO 4 mixture has been developed for the extractive separation of copper (Cu). The complex formed by Cu(II) and Nuclear Fast Red was found to be extracted into the acetone-rich upper phase, and the absorbance of the complex was determined at 465 nm. Beer’s law was obeyed over the concentration range of ~0.6–3.2 mg/l for Cu(II) with a good linearity. The proposed method has been applied to the separation and determination of Cu(II) in seafood samples with a coefficient of variation less than 2.8%. The recovery obtained was ~96.3–101.7%.
研究领域:
分析化学
·
环境化学
·
食品安全检测
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-11
·
IF 3.9
Li Yingquan,Zhao Baowei,Shang Tingting
Both biochar and humic acid adsorb heavy metals, but their combined effect has rarely been reported. In this paper, the adsorption of Cu(II) by single biochar (BS) and biochar with humic acid (BS + HA) in aqueous solution were studied, and the effects of solution pH, initial Cu(II) concentration, temperature and Ca 2+ ionic strength on the adsorption of Cu(II) were investigated. The results showed that under the same time, the adsorption of Cu(II) under the BS and BS + HA systems showed an increasing trend with the increase of pH, and the maximum adsorption capacity of the BS + HA system was reached at a pH of about 4, while the BS system alone exhibited a noticeable lag. The increase of the initial concentration of Cu(II) also promoted the adsorption capacity of the two systems, and the adsorption of Cu(II) by the BS and the BS + HA systems was a spontaneous adsorption process, and the elevation of the temperature effectively promoted the adsorption of Cu(II). The addition of Ca 2+ could promote the adsorption efficacy of the single BS system, but had little effect on the BS + HA system. Overall, the BS + HA system showed better adsorption than the single BS system, and the addition of humic acid enhanced the adsorption performance of biochar to Cu(II). The results could provide a theoretical basis for the combined action of biochar and humic acid on the remediation of Cu(II) contaminated water.
研究领域:
环境科学
·
土壤学
·
水污染修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Yu Liu,Ruiqi Fu,Yue Sun,Xiaoxin Zhou,Shams Ali Baig,Xinhua Xu
In this study, EDTA-functionalized Fe 3 O 4 (Fe 3 O 4 @SiO 2 -EDTA) was prepared by silanization reaction between N-(trimethoxysilylpropyl) ethylenediamine triacetic acid (EDTA-silane) and hydroxyl groups for Pb(II) and Cu(II) removal from aqueous solutions. Fe 3 O 4 @SiO 2 -EDTA composites were characterized using SEM, TEM, EDX, FTIR, XPS, TGA and saturated magnetization techniques. Maximum Pb(II) adsorption capacity was found to be 114.94 mg g −1 with SiO 2 /EDTA molar ratio of 2.5:1. The adsorption rate was significantly fast and the equilibrium was reached within 10 min. The optimum pH was recorded to be 5.0. The maximum adsorption capacity of the studied heavy metal ions calculated by Langmuir model followed the order: Cu(II) (0.58 mmol g −1 ) > Pb(II) (0.55 mmol g −1 ) ≈ Ni(II) (0.55 mmol g −1 ) > Cd(II) (0.45 mmol g −1 ). Moreover, Pb(II) and Cu(II) adsorption capacities were not significantly affected by co-existing cations and NOM. These results suggested that this adsorbent can be considered as a promising adsorbent to remove Pb(II) and Cu(II) from wastewaters.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiaojie Zhang,Kangrui Ma,Hong Peng,Yuefa Gong,Yanjun Huang
Simultaneous removal of chromium(VI) oxyanions and heavy metal cations from contaminated water body is of great significance. In this work, a novel and bifunctional sorbent, imidazolium functionalized polysulfone/DTPA-chitosan composite bead (IMPSF/DACS) was successfully constructed by phase inversion method and applied for co-removal of Cr(VI) and Cu(II) from aqueous solutions. The maximum adsorption capacities for Cr(VI) and Cu(II) on IMPSF/DACS in single system at pH 5 were 56.72 and 43.05 mg g −1 , respectively. In binary system, the removal of Cr(VI) could be further enhanced by the presence of Cu(II) due to the electrostatic shielding effect, while Cu(II) sorption was not significantly affected by the coexistence of Cr(VI). Moreover, IMPSF/DACS could simultaneously reduce low concentrations of Cu(II) and Cr(VI) in simulated contaminated lake water below the limit, while also showing good reusability in co-removal of Cr(VI) and Cu(II). The order of inhibitory effect of competing anions on Cr(VI) removal was as follows: H 2 PO 4 − < Cl − < NO 3 − < SO 4 2− , while the competing hardness cations had a little effects on the adsorption of Cu(II), implying that the Cr(VI) removal was mainly depended on the electrostatic attraction between Cr(VI) and imidazolium ions modified on IMPSF/DACS, and Cu(II) uptake was associated with chelation of DACS encapsulated in IMPSF/DACS beads. These assumptions were confirmed by XPS, FTIR and EDS-mapping techniques.
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
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Leming Zhen,Qiyuan Qin,Zhaofu Meng,Na Sun,Ze Liu,Ruohan Cheng,Can Xu,Wenhui Liu,Jingbing Xue
With the development of the nanotechnology industry, the possible coexistence of engineering nanoparticles with organic and heavy metal pollutants in aquatic systems has become a hot issue. However, how different nanoparticles affect the environmental behavior of oxytetracycline (OTC) − copper (Cu 2+ ) complex pollution remains unclear. In this study, we investigated the complex adsorption behavior of nano-TiO 2 and graphene oxide (GO) to OTC and Cu 2+ in water, and the differences of adsorption mechanism are discussed with characteristics analyses. When OTC and Cu 2+ coexist, Cu 2+ formed complexes with OTC, consuming oxygen-containing functional groups of OTC and reducing its adsorption on both nanoparticles. OTC does not affect Cu 2+ adsorption on nano-TiO 2 , but promotes Cu 2+ adsorption on GO. The OTC adsorption on nano-TiO 2 was primarily driven by hydrogen bonding and electrostatic attraction, leaving it with potential mobility. In contrast, the adsorption of OTC on GO was mainly through electrostatic attraction, π-π complexation and hydrogen bonding, and OTC reduced GO to rGO. These strong interactions stabilized OTC on GO surface, reducing its environmental mobility. The results of the research are of great environmental significance for exploring the impact of engineered nanoparticles discharged from industrial production in water on the combined pollution of OTC and Cu 2+ .
研究领域:
环境科学
·
纳米技术
·
水污染
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2022
·Vol. 13
·期 8
·1235
·
IF 3.523
Zhi Zhang,Yao Wang,Qun Chen,Qingguo Gao,Liming Liu,Jianjun Yang,Xinjian Pan,Yu Miao,Feng Chi
The electrophoretic display (EPD) has attracted widespread attention due to its great visual perception, energy-saving, portability, and bistability. However, the EPD still has many problems in response time, colorization, etc., which limits its practical application. In this paper, novel blue electrophoretic particles were prepared with copper (II) phthalocyanine and high ionization 1-butyl-1-methyl piperidinium bromide mono ionic liquid. It was shown that electrophoretic particles dispersed in a non-polar tetrachloroethylene medium had high Zeta potential and electrophoretic mobility. At the same time, electrophoretic particles showed better dispersion stability. Finally, the prepared blue electrophoretic particles and white titanium dioxide particles were compounded to prepare blue and white dual-color electrophoretic dispersion. An EPD cell was made to test its performance. The results showed that the prepared blue and white dual-color electrophoretic dispersion could realize a reversible response. Piperidine mono ionic liquid increased the surface potential of copper (II) phthalocyanine from +30.50 mV to +60.27 mV, enhancing it by 97.61%. Therefore, we believed that modifying particles with high ionization mono ionic liquid had great applicability to the modification of electrophoretic particles, and blue particles prepared with piperidine mono ionic liquid as a charge control agent (CCA) were excellent candidates for EPDs.Keywords:zeta potential;ionic liquid;copper (II) phthalocyanine;electrophoretic particle
研究领域:
材料科学
·
电泳显示器
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Mengxia Qing,Wenbin Liu,Liang Liu,Sibiao Huang,Zihang He,Yanshan Yin,Jun Xiang
Enhancing biochar's adsorption and solidification performance in compound-polluted aqueous solutions remains a crucial task for achieving the cost-effective removal of heavy metals from water bodies. The study examined the removal performances and mechanisms of Cu(II) and Cr(III) using biochar prepared from food waste at temperatures of 350 °C, 450 °C, and 550 °C (FWB-350, FWB-450, and FWB-550). FWB-450 exhibited the highest overall effectiveness in adsorbing Cu(II) and Cr(III), demonstrating the adsorption capacity (Q e ) of 40.283 and 21.456 mg/g in single-solution, respectively. Thermodynamic parameters indicate that the adsorption process involves physical and chemical reactions involving heat absorption. The impact of Cr(III) on the adsorption of Cu(II) is more apparent in the mixed competitive system. The pH, the oxygen-functional groups and carbonate ion quantity of FWB are crucial in improving Cu(II) and Cr(III) adsorption by affect the hydrolysis, complexation, and ion exchange processes. The presence of alkaline earth metal ions in FWB, like Ca(II), aids in the elimination of Cu(II) and Cr(III) through ionic precipitation and ion exchange, correspondingly. Furthermore, FWB adsorbed with Cu(II) and Cr(III) is relatively less hazardous than solid waste. The study validates the resource utilization of FW and its potential application of biochar in heavy metal adsorption.
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
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Xiaoyan Zhai,Hussein Hanibah,Nor Zakiah Nor Hashim,Juzheng Zhang,Xianli Ma,Lilan Wei,Xiaoqun Zhou
Platinum-based chemotherapeutics have played a critical role in oncology for decades. However, their broader utility is hindered by the advent of severe side effects and the emergence of drug resistance. The pursuit of alternative agents, particularly non-platinum (non-Pt) metal complexes, has gained momentum in current research. Designing efficacious non-Pt metal agents that target DNA poses a complex challenge. In this study, we present the strategic design, synthesis, and thorough characterization of two innovative copper(II) complexes leveraging adenine as a ligand, a potential avenue to overcome these challenges. Our investigation demonstrates the superior cytotoxicity of these copper(II) complexes compared to the benchmark cisplatin, with complex C2 exhibiting the most promising anticancer activity, showcasing an impressive IC 50 value of 4.51 μM in MGC-803 cells. Mechanistic insights underscore that complex C2 executes its cytotoxic effects by instigating DNA damage, orchestrating cell cycle arrest at the G2 phase, perturbing mitochondrial membrane potential, inducing ROS production, and ultimately triggering apoptotic pathways. These findings significantly emphasize the potential of designing novel adenine-based anticancer metal complexes targeting DNA, portraying a compelling trajectory for advancing anticancer drug development.
研究领域:
药理学
·
肿瘤学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2015
·
IF 1.227
T. He,W. Zhu,X. Wang,P. Yu,S. Wang,G. Tan,C. Ning
Copper(II) were immobilised onto medical titanium surface by polydopamine (PDA) chelating, to build intrinsic antibacterial implant materials for inhibition of implant infection. A scanning electrical microscope showed that the modified titanium surface morphology was a porous nanostructure. An energy dispersive spectrometer showed the existence of Cu, and X-ray photoelectron spectroscopy results further confirmed that the immobilised copper element was in the form of Cu(II). Bacteria plate colony counting results showed that modified titanium surface had decent antibacterial property, matching the ion release outcomes. It could be conclude that the PDA assisted Cu(II) immobilisation was an efficient and effective method for antibacterial modification of titanium.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jinglin Zhu,Yutao Huang,Juanjuan Peng,Shaomin Liu
Developing simple and effective activation approaches to degrade phosphonate is crucial due to its potential aquatic environmental risks. Recently, Cu(II)-mediated activation processes provide a feasible method via nonradical oxidation mechanism to remove phosphonate, but is yet challenged under neutral conditions. Herein, a strategy for enhancing the Cu(II)/peroxymonosulfate (PMS) process by adding hydroxylamine (HA) could efficiently degrade 1-hydroxyethane1,1-diphosphonic acid (HEDP) at pH = 7.0. After 15-min reaction, 85.7% of total phosphorus (TP) in HEDP transformed into PO 4 3− in the Cu(II)/PMS/HA process is observed, which is 3.4 times than that in the Cu(II)/PMS process. The results of multiple experiments confirm that the presence of HA accelerates the reduction of Cu(II) and the generation of reactive species, SO 4 •− and Cu(III) induced intramolecular electron transfer as the primary reactive species play a significant role in the degradation of HEDP. Additionally, the removal of HEDP is inhibited with the addition of Cl − and HCO 3 − in the Cu(II)/PMS/HA process. However, the Cu(II)/PMS/HA process demonstrates a superior removal effectiveness of HEDP in different actual wastewater samples compared to the Cu(II)/PMS process under neutral conditions. This study provides an effective method for removing phosphonate from actual wastewater.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2019
·
IF 2.923
Yi Xu,Jing Yang,Yao Lu,Ling-Ling Qian,Zhi-Yin Yang,Rui-Min Han,Jian-Ping Zhang,Leif H. Skibsted
Luteolin differs as a radical scavenger dramatically from apigenin in response to Cu(II) coordination despite a minor structural difference. Coordination of Cu(II) increases the radical scavenging efficiency of luteolin, especially at low pH, while decreases the efficiency of apigenin at both low and higher pH as studied by ABTS•+ radical scavenging. Luteolin forms a 1:1 complex with Cu(II) binding to 4-carbonyl and 5-phenol for pH <6 and to 3′,4′-catechol for pH >6. Apigenin forms a 1:2 complex independent of pH coordinated to 4-carbonyl and 5-hydroxylyl. Cu(II) coordinated to luteolin, as studied by pH jump stopped-flow, translocates with rate constants of 11.1 ± 0.3 s–1 from 4,5 to 3′,4′ sites and 1.0 ± 0.1 s–1 from 3′,4′ to 4,5 sites independent of Cu(II) concentration, pointing toward the dissociation of Cu(II) from an intermediate with two Cu(II) coordination as rate determining. 3′,4′-Catechol is suggested to be a switch for Cu(II) translocation with deprotonation initiating 4,5 to 3′,4′ translocation and protonation initiating 3′,4′ to 4,5 translocation. For dicoordinated apigenin, the coordination symmetry balances an electron withdrawal effect of Cu(II) resulting in a decrease of phenol acidity and less radical scavenging efficiency compared to parent apigenin. Compared to that of parent luteolin, the radical scavenging rate of both 4,5 and 3′,4′ Cu(II)-coordinated luteolin is enhanced through increased phenol acidity by electron withdrawal by Cu(II), as confirmed by density functional theory (DFT) calculations. Coordination and translocation of Cu(II) accordingly increases the antioxidant activity of luteolin at pH approaching the physiological level and is discovered as a novel class of natural molecular machinery derived from plant polyphenols, which seems to be of importance for protection against oxidative stress.
研究领域:
化学
·
生物化学
·
药理学
·
植物科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）