SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yuanyuan Lu,Xinqiang Liang,Jianming Xu,Ziyi Zhao,Guangming Tian
CuZrO 3 nanocomposites were prepared by chemical precipitation and oxidation at a high temperature (700 °C). The structural features of the fabricated CuZrO 3 nanocomposites (CuZrO 3 NCs) were elucidated by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results presented herein show that these nanocomposites formed a nanograde needle structure with high crystallinity. By mixing with graphene (Gr), a CuZrO 3 -Gr composite modified glassy carbon electrode (CuZrO 3 -Gr/GCE) was successfully constructed for the simultaneous electrochemical detection of Pb(II) and Cd(II) in a acetate (NaAc-HAc) buffer solution (pH 4.6) via square wave anodic stripping voltammetry (SWASV). Due to the synergetic effect of the CuZrO 3 nanoparticles and graphene, the CuZrO 3 -Gr/GCE showed excellent electrical conductivity and mechanical stability in the presence of Pb(II) and Cd(II) ions. The limits of detection were 0.1 μg L −1 for Pb(II) and 0.5 μg L −1 for Cd(II). Application of this method for the co-detection of two ions in soil samples is expected to obtain useful results and possess significant advantages over tradition detection methods.
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高影响因子
ENVIRONMENTAL POLLUTION
·
2016
·
IF 4.839
Xia Jia,Yonghua Zhao,Tuo Liu,Shuping Huang,Yafei Chang
Glomalin-related soil protein (GRSP), which contains glycoproteins produced by arbuscular mycorrhizal fungi (AMF), as well as non-mycorrhizal-related heat-stable proteins, lipids, and humic materials, is generally categorized into two fractions: easily extractable GRSP (EE-GRSP) and total GRSP (T-GRSP). GRSP plays an important role in soil carbon (C) sequestration and can stabilize heavy metals such as lead (Pb), cadmium (Cd), and manganese (Mn). Soil contamination by heavy metals is occurring in conjunction with rising atmospheric CO 2 in natural ecosystems due to human activities. However, the response of GRSP to elevated CO 2 combined with heavy metal contamination has not been widely reported. Here, we investigated the response of GRSP to elevated CO 2 in the rhizosphere of Robinia pseudoacacia L. seedlings in Pb- and Cd-contaminated soils. Elevated CO 2 (700 μmol mol −1 ) significantly increased T- and EE- GRSP concentrations in soils contaminated with Cd, Pb or Cd + Pb. GRSP contributed more carbon to the rhizosphere soil organic carbon pool under elevated CO 2 + heavy metals than under ambient CO 2 . The amount of Cd and Pb bound to GRSP was significantly higher under elevated (compared to ambient) CO 2 ; and elevated CO 2 increased the ratio of GRSP-bound Cd and Pb to total Cd and Pb. However, available Cd and Pb in rhizosphere soil under increased elevated CO 2 compared to ambient CO 2 . The combination of both metals and elevated CO 2 led to a significant increase in available Pb in rhizosphere soil compared to the Pb treatment alone. In conclusion, increased GRSP produced under elevated CO 2 could contribute to sequestration of soil pollutants by adsorption of Cd and Pb.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 43
·14839-14846
·
IF 4.029
Ruru Ma,Dongdong Xu,Yun Yang,Xin Su,Binghua Lei,Zhihua Yang,Shilie Pan
Two new isostructural rare-earth oxyborates ScMO(BO3) (M = Ca and Cd) with a three-dimensional (3D) cationic framework and parallel arranged [BO3] triangles have been synthesized by the flux method. In the 3D cationic framework, an interesting sandwich-like basic building unit (BBU) is constructed by two ∞1[Ca(1)O4]6− chains and two ∞1[Sc(1)O4]5− chains. ScMO(BO3) melt incongruently, which shows that title compounds can be grown by the flux method. The UV cut-off edges for ScCaO(BO3) and ScCdO(BO3) are 230 and 249 nm, respectively. In addition, the first-principles calculations are performed to gain further insights into the relationship between the microscopic electronic structures and associated optical properties.
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PLANT PHYSIOLOGY AND BIOCHEMISTRY
·
2024
·
IF 6.1
Zhilong Chen,Yixian Ma,Yong Ren,Lin Ma,Xiangru Tang,Shenggang Pan,Meiyang Duan,Hua Tian,Zhaowen Mo
Rice production is threatened by heavy metal stress. The use of multi-walled carbon nanotubes (MWCNTs) in agriculture has been reported in previous studies. We aimed to quantify the impact of MWCNTs on the growth and physiological characteristics of scented rice under cadmium (Cd) and lead (Pb) stresses. Therefore, a pot experiment was conducted, two scented rice varieties Yuxiangyouzhan and Xiangyaxiangzhan were used as materials grown under different concentrations of MWCNTs (0, 100, and 300 mg kg −1 recorded as CK, CNPs100, and CNPs300, respectively). The yield, antioxidant response, and rhizosphere microbial community of scented rice were studied. The results showed that compared with the CK treatment, the CNPs100 and CNPs300 treatments increased leaf dry weight by 17.95%–56.22% at the heading stage, and the H 2 O 2 content in leaves decreased significantly by 36.64%–42.27% at the maturity stage. Under CNPs100 treatment, the grain yield of two scented rice varieties increased significantly by 17.54% and 27.40%, respectively. The MWCNTs regulated the distribution of the Cd and Pb in different plant tissues. The content of Cd (0.11–0.20 mg kg −1 ) and Pb (0.01–0.04 mg kg −1 ) in grain were at a safety level (<0.2 mg kg −1 ). Moreover, MWCNTs increased soil microbial community abundance and altered community composition structure under Cd–Pb stress, which in turn improved agronomic traits and quality of scented rice. Overall, this study suggested that the application of MWCNTs regulates the growth, yield, physiological response , and soil microbial community, the genotypes response effect of scented rice to MWCNTs is needed further studied.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 14
·9848-9859
·
IF 3.9
Shangbo Li,Zijian Liu,Xiaohan Gao,Lidi Cheng,Zexian Xu,Li Li,Yaru Diao,Liqiang Chen,Yanshan Liu,Jian Sun
Jaw defects, which can result from a multitude of causes, significantly affect the physical well-being and psychological health of patients. The repair of these infected defects presents a formidable challenge in the clinical and research fields, owing to their intricate and diverse nature. This study aims to develop a personalized bone tissue engineering scaffold that synergistically offers antibacterial and osteogenic properties for treating infected maxillary defects. This study engineered a novel temperature-sensitive, sustained-release hydrogel by amalgamating β-cyclodextrin (β-CD) with chlorhexidine (CHX) and a decellularized extracellular matrix (dECM). This hydrogel was further integrated with a polylactic acid (PLA)–nano hydroxyapatite (nHA) scaffold, fabricated through 3D printing, to form a multifaceted composite scaffold (nHA/PLA/dECM/β-CD–CHX). Drug release assays revealed that this composite scaffold ensures prolonged and sustained release. Bacteriological studies confirmed that the β-CD–CHX loaded scaffold exhibits persistent antibacterial efficacy, thus effectively inhibiting bacterial growth. Moreover, the scaffold demonstrated robust mechanical strength. Cellular assays validated its superior biocompatibility, attributed to dECM and nHA components, significantly enhancing the proliferation, adhesion, and osteogenic differentiation of osteogenic precursor cells (MC3T3-E1). Consequently, the nHA/PLA/dECM/β-CD–CHX composite scaffold, synthesized via 3D printing technology, shows promise in inducing bone regeneration, preventing infection, and facilitating the repair of jaw defects, positioning itself as a potential breakthrough in bone tissue engineering.
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Food and Bioprocess Technology
·
2024
·
IF 5.3
Cao Zhaoxin,Su Jingyi,Luo Yali,Wang Xinyu,Liu Zhiming,Chen Yanqi,Zou Yijing,Shen Wen,Ge Xuemei
Carvacrol essential oil has broad-spectrum antibacterial properties, but the essential oil is volatile and unstable for long-term storage and use. In order to improve the relevant properties of carvacrol, in the present study, carvacrol was encapsulated with β-cyclodextrin (β-CD) using the saturated aqueous solution method, and response surface analysis was carried out, which gave a high encapsulation rate (63.58 ± 3.74%). The success encapsulation of carvacrol was confirmed by scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The release performance of the encapsulants was also tested at different temperature and humidity levels. In addition, polyethylene glycol (PEG) composite carvacrol-inclusive preservation paper prepared by these anhydrous conditions showed high antibacterial activity against Streptomyces fructus Monilinia fructicola , the main pathogen of peaches. Also, PEG was used to form the film in the anhydrous condition with the inclusion compound and ethylene inhibitor 1-methylcyclopropene (1-MCP) to obtain the film coated paper, and its effect on postharvest preservation quality of peach was studied. The results showed that PEG + Carvacrol-β-CD + 1-MCP-α-CD inclusion complexes (ICs) effectively prolonged the storage time and improved the fruit quality and enzyme activity of peach. This study provides a solution for the preparation of controlled-release coated paper with essential oils and 1-MCP bioactives to extend the shelf life of fruits and vegetables. Graphical Abstract
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fuxuan Bi,Zhao Jiang,Zhiyu Zhang,Zhan Zhang,Mengning Wang,Libo Fu,Hongli Fan,Jianhua Qu,Ying Zhang
Currently, the reported stabilizers for soil remediation mainly focus on reducing the availability and migration of heavy metals, yet shifts in surrounding environmental factors can lead to the remobilization of these pollutants. Herein, a novel polyethyleneimine (PEI) cross-linked magnetic cellulose aerogel (MCA PEI ) was synthesized and employed for remediating cadmium (Cd)-polluted soil and alleviating the stress effects of Cd on green fertilizer (SV), a key biological fertilizer in southwest China. The cellulose derived from straw showed distinct characteristic peaks, with a substantial rise in functional group content following gelation, while the magnetized gel demonstrated easy recovery from soil. The synthesized MCA PEI demonstrated broad pH adaptability and rapid Cd(II) uptake, achieving a maximum binding capacity of 200.41 mg/g. The DTPA-Cd concentration was reduced by 89 % with a 3.0 % MCA PEI dosage under 40 % of soil moisture after 20 d. After 1 % MCA PEI remediation and recycling, the total amount of Cd in the soil decreased, which was conducive to improving soil properties, reducing the accumulation of Cd in SV, and promoting the growth of SV. In short, this study proposed a sustainable and effective remediation strategy for Cd-polluted soil using a magnetic functionalized aerogel that could be easily separated from the soil after remediation.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Hongkai Huang,Jiahao Wang,Yuqing Zheng,Weidong Bai,Ya Ma,Xiaojuan Zhao
The discarded longan shell-derived porous carbon material (LPC) served as a scaffold for synthesizing bismuth nanoparticle-loaded longan porous carbon nanocomposite (BiNPs@LPC) via a hydrothermal method . Then BiNPs@LPC was utilized to modify screen-printed carbon electrodes (SPCE) for simultaneous detection of Pb(II) and Cd(II) by square wave anodic stripping voltammetry (SWASV). The material was thoroughly characterized by scanning electron microscopy , X-ray diffraction, Raman spectra , Brunauer-Emmett-Teller analysis, electrochemical impedance spectroscopy and cyclic voltammetry . BiNPs@LPC exhibited abundant porous structures, high surface area , and numerous active sites, which could improve significantly response sensitivity. Under optimal conditions, the peak currents of Pb(II) and Cd(II) exhibited favorable linear relationships with the concentration within a range of 0.1–150 μg L −1 , with detection limits (S/N = 3) of 0.02 μg L −1 and 0.03 μg L −1 , respectively. BiNPs@LPC/SPCE demonstrated remarkable selectivity , stability and repeatability. The proposed method was successfully applied for the detection of Pb(II) and Cd(II) in seafoods achieving satisfying recovery of 97.8%–108.3% and 96.7%–106.4%. These excellent test properties were coupled with convenience for batch preparation of the modified electrodes , highlighting its potential for practical applications in heavy metal detection of real samples.
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高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Jia-Hao Gao,Pei-Pei Huang,Jie Liu,Nan Zheng,Dong Wang,Si-Yu Yue,Er-Nu Liu,Quan Liu,Bo Liu,Jiu-Fu Lu
Three new metal coordination polymers with different spatial structure, namely {[Co 2 (H 2 O) 6 (4-PDCA) 2 ] 2 ·3H 2 O} n ( SNUT-12 ), {[Cd(H 2 O) 2 (4-PDCA)]·2H 2 O} n ( SNUT-13 ) and [Zn 2 (4-PDCA) 2 ] n ( SNUT-14 ), where H 2 (4-PDCA) = 1-(4-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylic acid, were synthesized by changing the central ion with the same ligand under solvothermal and hydrothermal conditions, which were further characterized by single crystal X-ray diffraction, powder XRD, FT-IR and TGA . Single crystal X-ray analysis revealed that SNUT-12 exhibits a 1D infinite zigzag chains which were constructed by Cobalt(II) ion and 4-PDCA 2− ligand, SNUT-13 features a 2D ladder-like structure. Meanwhile, SNUT-14 displays 2-fold 3D → 3D parallel interpenetrating frameworks. In addition, SNUT-12 exhibited high electrocatalytic oxygen evolution reaction, and SNUT-13, SNUT-14 showed strong fluorescence at room temperature .
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Wei Zhou,Pute Wu,Lin Zhang,Shengyu Yao,Delan Zhu,Yaohui Cai
Developing an ultra-thin polyamide selective layer with sufficient mechanical robustness on a highly porous ceramic substrate is challenging for removing heavy metal ions from wastewater. We synthesized a reliable ceramic-polyamide membrane by assembling nanocomposite interlayers of alumina and carbon black on the kaolin substrate. The surface morphology, pore size distribution, and roughness of ceramic substrates were improved by introducing the nanocomposite interlayer. The corresponding optimized water flux , Pb(II), and Cd(II) removal efficiency are 2.75 L m −2 h −1 , 98.44%, and 97.51%, respectively, which are better than those of the polyamide films constructed directly on the ceramic substrate. This facile structure provides more active sites for forming ultrathin polyamide layers with satisfactory mechanical robustness. This paper provides a new perspective for fabricating efficient heavy metal ions filters.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Adeel Ahmed,Muhammad Usman,Bing Yu,Fengyuan Gao,Youqing Shen,Hailin Cong
The unintended leakage of endocrine-disrupting bisphenol A (BPA) from different industries into the aquatic environment has posed a severe threat to aquatic lives and human health. Herein, we explored a hydrothermal method to synthesize superparamagnetic β-cyclodextrin-cobalt ferrite (β-CD-CoFe 2 O 4 ) catalyst for the selective capturing and efficient degradation of BPA through heterogeneous activation of peroxymonosulfate (PMS). The as-prepared catalysts were systematically characterized through multi-techniques to explore the relationship between their catalytic performance and material properties. Results showed that, in β-CD-CoFe 2 O 4 /PMS system, the degradation rate of BPA reached 99.23% in 60 min with a rate constant of 0.0708 min −1 , approximately 16.09 times than CoFe 2 O 4 /PMS system (0.0044 min −1 ). Specifically, the large surface area and availability of more reactive sites of β-CD-CoFe 2 O 4 boosted the activation process of PMS compared to pristine CoFe 2 O 4 , thus enhancing the degradation of BPA. Meanwhile, the effect of different operational parameters and co-existing anions on BPA degradation were also investigated. The generation of free radicals ( S O 4 ∙ - , ∙ O H , O 2 ∙ - , a n d 1 O 2 ) in the β-CD-CoFe 2 O 4 /PMS system liable for reducing BPA was corroborated through electron paramagnetic resonance analysis and quenching experiments. The possible degradation pathways of BPA were proposed based on the identification of reaction intermediates formed during the mineralization process. In brief, the findings of this study suggested that β-CD-CoFe 2 O 4 is an efficient and environmentally friendly catalyst that facilitated the degradation of BPA through PMS activation. Moreover, the excellent magnetic separation, stability, and reusability of the β-CD-CoFe 2 O 4 catalyst make them promising candidates for their water purification applications.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Kai-Yao Wang,Yang Liu,Jia-Ying Zhu,Lin Cheng,Cheng Wang
Deep investigations on the synthetic and structural chemistry of heterometallic chalcogenidostannates bear fundamental significance for the establishment of the structure–property relationship that would offer guidance on the functional material innovation. Presented here are four ammonium- and/or alkylammonium-directed M–Sn–Q (M = Zn, Cd; Q = S, Se) compounds, namely, [NH4]7[H3O]3Zn4Sn4S17 (1), [NH4]5[(CH3)2NH2]Zn4Sn5S17 (2), [CH3CH2NH3]22Zn16Sn12Se51(H2O)4·16H2O (3), and [NH4]2CdSnSe4 (4). All four compounds were synthesized in deep eutectic solvents (DESs) or ethylamine aqueous solution, both of which function simultaneously as reaction media and structure-directing agents. Compound 1 consists of discrete P1-[Zn4Sn4S17]10– clusters templated by mixed [NH4]+/[H3O]+ cations. In compound 2, such P1 clusters are bridged by Sn4+ ions in a 4,4-connection mode to form a [Zn4Sn5S17]n6n– framework with three types of cavities (I–III) varying in size. The two smaller cavities (I and II) accommodate NH4+ while the larger one(III) is occupied by [(CH3)2NH2]+, reflecting the rational size-dependence of cations on cavities. Compound 3 features an [Zn16Sn12Se51(H2O)4]n22n– open framework constructed from the 4,3-connection of P1-[Zn4Sn4Se17]10– clusters and {Zn(H2O)}2+ bridges. This linkage mode contributes to a large cage-like subunit (inner dimension: 21.99 × 9.06 Å2) and therefore an ultrahigh porosity that are occupied by [CH3CH2NH3]+ cations and water molecules (volume fraction: 57.7%). Compound 4 exists as a stacking of [CdSnSe4]n2n– chains, which are composed of alternatively arranged {CdSe4} and {SnSe4} tetrahedra, in combination with [NH4]+ cations as both charge-compensating and space-filling agents. Detailed synthetic, structural, and topological analyses were performed on these solid materials, coupled with extensive investigations on their optical and thermal properties. Compound 3 exhibits an efficient Sr2+ adsorption performance, featuring ultrafast kinetics (94.69% in 5 min), high removal rate (98.57% in 20 min) at equilibrium, and high capacity (104.17 ± 23.53 mg g–1).
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危险品化学品经营许可证（带存储）