JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Jiang Xiao,Rui Hu,Guangcai Chen
A cost-effective and eco-friendly engineering method to improve biochar’s physicochemical and sorption performance is critical in various environmental applications. In this study, micro-nano-engineered nitrogenous biochars derived from cow bone meal pyrolyzed at different temperatures and were engineered with the assistance of a ball-milling technique. The ball-milled bone biochars were natural composites combined with plant biochars and hydroxyapatite components on the micro-nanoscale. Both the micropore area and the external specific surface area of the bone biochars were significantly improved after ball-milling. The sorption capacities for heavy metal ions were heavy metal ions were MBC-600 > MBC-450 > BC-600 > MBC-300 > BC-450 > BC-300, consistent with the variation tendency in the specific surface areas of the bone biochars. The adsorption capacities of MBC-600 for Cd(II), Cu(II) and Pb(II) were 165.77, 287.58 and 558.88 mg/g, respectively (T 298K, pH 5.0), representing increases of 93.91.%, 75.56% and 64.61% compared with the un-milled preparation. Surface complexation, cation exchange, chemical precipitation, electrostatic interaction and cation-π bonding were responsible for the removal of heavy metal ions by bone biochar materials. Taken together, the results show that micro-nano-engineered nitrogenous bone biochar prepared using ball-milling technology is a promising material for the remediation of heavy metals-bearing aquatic environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Hai Wang,Qian Chen,Haixin Xia,Renrong Liu,Yaohong Zhang
To enhance Pb(II) and Cd(II) elimination, new composites (FeNi-RSN-(OH)(NH 2 ) and FeNi-RSN-OH) were fabricated by loading biochar with Fe-Ni nanoparticles and functionalizing biochar by amination/hydroxylation in the study. The maximum sorption capacities of both adsorbents toward Pb(II)/Cd(II) were 217.09/209.36 mg/g and 242.15/229.52 mg/g, respectively, which were 4.30–4.79 times higher than those of the raw biochar. The significantly enhanced adsorption capacity could be attributed to the increased O/N-containing groups and Fe-Ni nanoparticles on the adsorbent surface. The introduction of Fe-Ni nanoparticles and O/N-containing groups promoted the complexation and electrostatic interactions and made them playing major roles in the adsorption. Besides, ions exchange and physical adsorption played non-negligible roles in the adsorption process. Additionally, the both adsorbents exhibited favorable anti-interference ability and cycling stability. Taken together, the study revealed that the new biochar composites of FeNi-RSN-(OH)(NH 2 ) and FeNi-RSN-OH could be used as a reusable magnetic adsorbents with promising prospect in current practice for the effective remediation of heavy metals-bearing wastewater. The study not only provided a feasible design, synthesis and optimization strategy of biochar for heavy metals contaminants removal, but also realized the sustainable utilization of waste.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Siyuan Zhang,Xinjian Cheng
Developing water-soluble fluorescent probes has important scientific and practical significance. In this work, coumarin derivatives bearing -OH were obtained through the classical Knoevenagel reaction firstly. Secondly, -C C- on allyl bromide was introduced into coumarin by Williamson ether formation method. Thirdly, hydrazine hydrate was added to the coumarin derivatives, a polymerizable small molecular coumarin fluorophore containing probe was obtained successfully. And, the -COOH on di-thioester underwent an esterification reaction with –OH groups on β-cyclodextrin(β-CD) to prepare oligomer based reversible addition-fragmentation chain transfer(RAFT) reagents. Finally, three copolymer probes β-CD-PMAA-Coumarin, β-CD-PMAm-Coumarin, and β-CD-PHEMA-Coumarin were prepared via RAFT polymerization , in which C C-coumarin was used as the functional monomer and methacrylamide(MAm)/methacrylic acid (MAA)/hydroxyethyl methacrylate (HEMA) as the main monomers. The MALDI-TOF mass tests showed that the macromolecular level probes were successfully prepared. These polymer probes have molecular weights up to 5.4 kDa and have narrow molecular weight distributions (PDI≤1.31). With the assistance of water-soluble long-chained PMAm/PMAA/PHEMA and hydrophilic β-CD, the coumarin containing macromolecular fluorescent probes could be dissolved in water readily. These water soluble polymer fluorescent probes could recognize Fe 3+ /Fe 2+ and Cu 2+ ions with high sensitivity. The detection limit of Fe 3+ could be as low as 0.34 μM. This study successfully developed a promising technique for producing highly selective, fully water-soluble fluorescent macromolecular probes.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Kasi Gopinath,Sathishkumar Gnanasekar,Khalid A. Al-Ghanim,Marcello Nicoletti,Marimuthu Govindarajan,Ayyakannu Arumugam,Chinnasamy Balalakshmi,Sarinthip Thanakkasaranee
In the present study, Neodymium (Nd), Cadmium (Cd), and the various molar ratios of Nd: Cd doped copper oxide nanocomposites (CuO NCs) were prepared by the co-precipitation method. The as-synthesized Nd, Cd, and Nd:Cd doped CuO NCs [Cu 1-x + y Nd x Cd y O, (x:y = 0.006:0.00, 0.00:0.006, 0.005:0.001, 0.004:0.002, 0.003:0.003, M)] were characterized through various instrumentation techniques such as TGA , UV–Vis–NIR, FTIR, Raman, FL, XRD , ZP , FE-SEM with EDAX elemental mapping, HR-TEM and XPS analyses. Further, the antibacterial activity of doped CuO NCs was tested against Staphylococcus aureus and Escherichia coli . An equal molar ratio of Nd and Cd doped CuO NCs showed excellent antibacterial activity mainly due to the synergistic effect of sufficient Nd 3+ , Cd 2+ , and Cu 2+ ions releasing ability . Interestingly, the doping effect enhances surface defects and decreases the ability to scavenge free radicals compared to pure CuO nanomaterials . At the same time, the cytotoxicity of NCs was evaluated on the human lung epithelial L132 cell line. Evidently, 75 μg/ml concentration of Nd:Cd doped CuO NCs samples shows 80% viability, which confirms their negligible cytotoxic effect. The Nd:Cd doped CuO NCs (94:3:3) had a high aspect ratio shape, remarkable ion-releasing ability, and biocompatibility while being thermally stable. Because of these qualities, they are well suited for treating bacterial infections in the biomedical area.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Yuan Dang,Xiaojiao Wang,Rongrong Cui,Shuangli Chen,Yuanzhen Zhou
A sensitive and selective electrochemical sensor based on poly-(nicotinic acid) (PNA) film and Cd-doped ZnWO 4 (Cd-ZnWO 4 ) nanoneedles organic-inorganic nanocomposite modified carbon paste electrodes (PNA(ii)/Cd(0.02)-ZnWO 4 /CPE) is successfully constructed and applied to study the catalytic oxidation of hydroquinone (HQ) and catechol (CC). X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical techniques are used to characterize the composition , morphology and electrochemical properties of the modified electrode . The sensor exhibits strong electrocatalytical activity towards the oxidation of HQ and CC for the higher specific surface area of Cd-ZnWO 4 nanoneedles, fluent electron transfer capacity and the synergistic effect of inorganic Cd-ZnWO 4 and organic PNA. Wide linear ranges are obtained as 1–56 μM for HQ and 2–35 μM for CC, with the detection limits of 0.17 μM and 0.03 μM, in the differential pulse voltammetry (DPV) determination of HQ and CC, respectively. Satisfactory repeatability, stability and anti-interference performance are also achieved on PNA (ii)/Cd(0.02)-ZnWO 4 /CPE. Meanwhile, the proposed sensor realizes the detection of CC and HQ spiked in local tap water samples successfully.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 43
·期 3
·1544-1550
·
IF 3.201
Lei Liu,Ke Zhang,Yumin Wei
The development of an uncomplicated, fast and low-price method for heavy metal ion detection is essential for environmental detection and pollution control. In this research, an innovative type of electrochemical detection sensor was realized by using a kind of glassy carbon electrode (GCE) modified with thiacalix[4]arene (TC4A). The results indicated that Cu(II), Cd(II) and Pb(II) ions in the sample solution can be detected quickly and simultaneously in the differential pulse anodic stripping voltammetry (DPASV) mode. The test results can reveal whether the concentration of heavy metal ions in wastewater is up to standard. The optimization of multiple experimental parameters including the amount of modification, pH value, deposition time and deposition potential was studied and accomplished. Under the best experimental conditions, the peak value of the voltammetry current increased linearly with the concentration. Within this range, the peak current value and concentration have a very good linear relationship with increasing concentrations of Cu(II), Cd(II) and Pb(II) ions in the ranges of 1.0–2.0 mg L−1, 0.1–1.0 mg L−1 and 1.0–2.0 mg L−1, respectively. And the limits of detection (S/N = 3) are estimated to be 3.0 μg L−1 for Cu(II), 4.0 μg L−1 for Cd(II) and 2.5 μg L−1 for Pb(II), which are lower than those obtained at the unmodified electrodes. Most importantly, the modified electrode was successfully applied in the determination of heavy metals in river water. This innovative electrochemical detection sensor shows high sensitivity, good stability and reproducibility.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 2
·期 8
·2599-2608
·
IF 0
Xingqi Wang,Wenxia Liu,Jian Tian,Zhenhuan Zhao,Pin Hao,Xueliang Kang,Yuanhua Sang,Hong Liu
Uniform well-defined nanostructured BiOBr microspheres have been fabricated via a simple hydrothermal method in the presence of cetyltrimethylammonium bromide (CTAB) and ethylene glycol (EG). The heavy metal ion adsorption on the as-synthesized nanostructured BiOBr microspheres was systematically assessed by measuring the residual concentration during the adsorption process using a colorimetric method for Cr(VI) concentration, and an extraction-colorimetric method for Cd(II) and Pb(II) concentrations. The nanostructured BiOBr microspheres showed good removal capacity for heavy metal ions (Cr, Cd, Pb), and excellent adsorption properties for low concentration heavy metal ions, indicating potential applications in water purification. Based on the quick and efficient heavy metal ion removal ability of nanostructured BiOBr microspheres, a continuous filtering-type water purification device was designed and constructed. In using this continuous filtering type water purification device, 1 g of adsorbent can purify about 4900 g of Pb(II) contaminated water, 5900 g of Cd(II) contaminated water, or 21 500 g of Cr(VI) contaminated water having initial concentrations of 200 μg L−1 to successfully attain the World Health Organization standard for drinking water. The good removal capacity can be attributed to the hierarchical nanostructure, which displays a large specific surface area and strong adsorption of heavy metal ions.
✓ 已验证
产品关联
DOI
Coatings
·
2024
·Vol. 14
·期 4
·439
·
IF 2.9
Xi Quan,Pengzhao Lv,Linlin Yin,Wei Zuo,Yu Tian,Jun Zhang
This study presents a detailed investigation into the use of β-cyclodextrin (β-CD) encapsulated iron oxide nanoparticle (β-CD@Fe3O4) composites, modified with different ligands, to activate peroxymonosulfate (PMS) for the degradation of pharmaceutical contaminants, namely, diclofenac, carbamazepine, and erythromycin. The focus is on understanding the ligand effect, particularly using citric acid (CIT), polyethyleneimine (PEI), and cetyl trimethyl ammonium bromide (CTAB), on the degradation performance of these composites. Employing density functional theory (DFT) calculations, this work examines the electronic structure and charge distributions of β-CD@Fe3O4composites, providing insights into their interaction with various pollutants. The study reveals that the β-CD@PEI@Fe3O4composite demonstrates superior degradation efficiency due to optimal electrostatic interactions, regardless of the pollutant’s hydrophobicity. On the other hand, β-CD@CIT@Fe3O4shows moderate efficiency, and β-CD@CTAB@Fe3O4exhibits selective efficiency, particularly for hydrophobic compounds. These findings underscore the significant role of surface chemistry in modulating the activation of PMS and the degradation of contaminants, opening avenues for designing tailored β-CD composites for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2024
·
IF 2.2
Ying Zhou,Xiao-Tong Song,Hui-Chao Guan,Shu-Mei Yue
In this investigation, six new metal complexes with 2-(pyridin-2-yl)benzo[d]imidazole (bpm) were synthesized and analyzed by single-crystal X-ray diffraction (XRD), including catena-bis[(µ-2,2-bis(4-carobxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)-1H-benzimidazole)-aqua-zinc] (1), catena-[(µ-2,2-bis(4-carobxyphenyl)hexafluoropropane)-(2-(pyidin-2-yl)-1H-benzimidazole)-aqua-cadmium] (2), aqua-[2,2-bis(4-carobxyphenyl)hexafluoropropane]-bis[2-(pyridin-2-yl)-1H-benzimidazole]-manganese (3), μ-[2-nitrobenzene-1,4-dicarboxylato]-μ-[2-nitrobenzene-1,4-dicarboxylato]-bis[2-(pyridin-2-yl)-1H-benzimidazole]-di-zinc (4), catena-[bis(µ-2-nitrobenzene-1,4-dicarboxylato)-diaqua-bis(2-(pyridin-2-yl)-1H-benzimidazole)-di-cadmium] (5), aqua-[pyridine-2,6-dicarboxylato]-[2-(pyridin-2-yl)-1H-benzimidazole]-copper hydrate (6) (H2hfipbb = 2,2-bis(4-carboxyphenyl)hexafluoropropane, H2nbdc acid = Nitroterephthalic acid, and H2pda = 2,6-pyridinedicarboxylic acid). Complex 1 crystallized in a monoclinic system with space group P21/n; 2 crystallized in a monoclinic system with space group C2/c; 3 crystallized in an orthorhombic system with space group Pna21; 5 crystallized in a monoclinic system with space group P21/c; 4 and 6 crystallized in triclinic systems with space group P-1. The DNA-binding modes of the complexes were investigated by several analysis methods (e.g. viscosity analysis, circular dichroism spectroscopy, fluorescent spectroscopic analysis, as well as UV spectroscopic analysis). Complexes 1-6 bind to calf thymus DNA via an intercalative mode. The results of this study provide insights into the mechanism of DNA binding and provide a basis for rationally designing new powerful reagents for DNA detection and targeting.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Zi-Ping Wang,Yu Wang,Xin-Yu Li,Lin-Fang Jia,Ai-Zhen Yang,Wen-Ting Zhao,Yi Jia,Bao-Yi Yu,Han-Qing Zhao
The synthesis and characterization of three 2D to 3D metal-organic frameworks (MOFs) with mixed ligands, namely {[Cd(DINT)(TPA)(H 2 O)]ACN} n (BAO24) (H 2 TPA = tere phthalic acid, DINT = 1,4-di(imidazol-1-yl)naphthalene, and ACN = acetonitrile), {[Cd(DINT)(IPA)]DMF} n (BAO25) (H 2 IPA = iso phthalic acid and DMF = N,N -dimethylformamide), and [Cd(DINT)(PA)] n (BAO26) (H 2 PA = phthalic acid), were reported herein. The structures and purities of the MOFs were revealed and confirmed by single-crystal X-Ray diffraction, Fourier transform infrared spectroscopy, powder X-Ray diffraction, thermogravimetric analysis, and elemental analysis. The MOFs exhibited a fluorescence emission peak around λ em = 340 nm with relative excitation wavelengths at both 230 and 290 nm. Since the MOFs showed similar fluorescence properties, BAO24 was selected as a representative MOF in the fluorescent sensing processes. The result showed that BAO24 exhibited a high sensitivity for vitamin B2. However, when sensing pesticides, the sensor performed differently at each excitation wavelength. At λ ex = 230 nm, the sensor was quenched the most significantly with the nitenpyram analyte, while at λ ex = 290 nm, the highest fluorescence quenching was achieved by the imidacloprid analyte.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yuting Cui,Yue Zhou,Mingqian Cheng,Wei Fang,Yaoling Wang,Chao Chen,Tingting Liu,Bin Li,Zewei Liu
The escalating contamination of water resources by toxic heavy metals necessitates sustainable remediation strategies. This study presents a novel adsorbent, RHC-180/0.5, synthesized via a one-step hydrothermal carbonization under mild conditions, utilizing red mud (RM) and spent coffee grounds (SCG) as raw materials. The biopolymers in SCG, including cellulose, hemicellulose, and lignin, transformed into hydroxyl, carboxyl, and phenolic groups, enhancing the material's adsorption capacity. Batch adsorption experiments showed optimal performance under alkaline conditions. To minimize precipitation interference, the adsorption mechanism was further investigated at pH = 6. Pseudo-second-order kinetics and Freundlich isotherm models indicated chemical adsorption and heterogeneous multilayer adsorption, respectively. Simultaneously, the Langmuir model yielded maximum theoretical adsorption capacities of 302.33 mg/g and 154.97 mg/g for Pb(II) and Cd(II), respectively, confirming the excellent adsorption performance of RHC-180/0.5. Intraparticle diffusion model analysis showed that surface diffusion dominated in the three-phase adsorption process. Thermodynamic analysis confirmed that the adsorption process was endothermic. Spectroscopic analysis validated the roles of chemical precipitation, ion exchange, and cation-π interactions, surface complexation, and redox reactions in the adsorption mechanism. At pH = 6, RHC-180/0.5 retained approximately 80 % of its initial removal efficiency after ten regeneration cycles, demonstrating excellent stability and reusability. This work highlights a sustainable, cost-effective approach to converting agricultural and industrial waste into high-performance adsorbents for heavy metal-contaminated wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL LETTERS
·
2025
·
IF 1.8
Kong Weiheng,Zhu Haitao,Cheng Xingwang,Wang Yu,Song Wei,Zhou Dianbing,Fu Yan,Yu Xiaofeng,Wu Qiong,Han Fang
A functionalized Zr-based metal–organic framework (MOF) was synthesized using UiO-66 as the framework, polydiallyldimethylammonium (PDDA) as the interfacial modifier, and polydopamine (PDA) as the functionalizing agent through a straightforward one-pot hydrothermal reaction. The material underwent characterization through X-ray diffraction to determine its crystal structure, scanning electron microscopy and transmission electron microscopy to analyze its surface morphology and microstructure, and X-ray photoelectron spectroscopy to evaluate its elemental oxidation states. These analyses revealed that UiO-66-PDDA-PDA displayed well-dispersed PDA and an abundance of functionalized hydroxyl and amino groups. Utilizing this innovative functionalized MOF material, an electrochemical sensor was developed based on a UiO-66-PDDA-PDA-modified glassy carbon electrode for the simultaneous determination of Cd2+, Cu2+, Pb2+, and Hg2+. The fabricated electrochemical sensor exhibited excellent selectivity and rapid response to microgram levels of the mentioned heavy metal ions in tea, water, and dairy products using cyclic voltammetry. The sensor demonstrated remarkably low detection limits and stable relative standard deviations (RSDs) for the four heavy-metal ions. Furthermore, the electrochemical properties and applications of the modified electrode were investigated by optimizing operational parameters such as pH, deposition potential, and deposition time to improve the detection of trace ions. This approach offers a rapid screening method for inspectors to verify sample compliance.
✓ 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）