ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 27
·期 1
·812-822
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IF 2.914
Xu Suyun,Yan Ning,Cui Minghao,Liu Hongbo
In this study, ozone-oxidation was used to treat synthetic chemical plating solution containing Cu(II)/Ni(II)-EDTA solution to realize the purpose of decomplexation. The effects of solution pH, initial concentration of Cu(II)/Ni(II)-EDTA, the molar ratio of EDTA to Cu(II)/Ni(II), and the coexistence of Cu(II)/Ni(II) on their removal efficiencies were investigated. The degradation of EDTA-Cu(II) and EDTA-Ni(II) were mainly attributed to OH oxidation, and the removal rates of Cu(II)/Ni(II) depend on the complete decomplexation. The removal rates of Cu(II) and Ni(II) was affected by the pH of solution, and the optimal pH was found to be 7–9; nevertheless, their removal rates can still be up to 90% even in acidic pHs of 3~5. When the molar ratio of EDTA to Cu(II)/Ni(II) increased from 1:1 to 3:1, the kinetics of metal ion removal rate declined from 0.0788 and 0.1139 min -1 to 0.0250 and 0.0271 min -1 . The synergistic effect was found in the Cu(II)/Ni(II) blended system due to the higher catalytic capability and the lower complexation affinity toward EDTA for Ni(II). In summary, ozone oxidation can be considered as an effective technology to realize the complete decomplexation of Cu(II)/Ni(II)-EDTA that contained in chemical plating industry wastewater.
Graphical Abstract
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2019
·
IF 0
Xiao Fang Chen,Ning Jiang,Song Hu,Li Mo He,Guang Liao,Qiang Qiang Ren,Sheng Su,Yi Wang,Jun Xiang,Ji Hua Qiu
The conditions (adsorption duration and pH) for removal of nickel ions from nickel electroplating wastewater by adsorbing on activated carbon were studied. Ni/AC catalysts prepared by adsorption under alkaline conditions with high removal rate of Ni(II) has been chosen for catalytic steam reforming of toluene, and its catalytic performances were evaluated compared to that of Ni/AC catalysts prepared by impregnation. Alkaline conditions facilitated the removal of Ni(II) from nickel electroplating wastewater by AC and pH=9 in especial, was a critical point above which Ni(II) could be removed efficiently. The removal rate within 20 min reached up to more than 97%. After H2 reduction, the catalytic activity of Ni/AC-Ad was observed in catalytic steam reforming of toluene and then gradually decreased with the reaction time. Both the toluene conversion and hydrogen production with Ni/AC-Ad were about 65% of those with Ni/AC-Im at similar Ni loading rate. Under alkaline conditions, most of the nickel adsorbed on AC was Ni(OH)2 complex. This adsorption state led to a larger average size of nickel particle in Ni/AC-Ad than that in Ni/AC-Im. The uneven size of nickel particles on the surface caused poor dispersion of active spots, agglomeration and sintering, resulting in gradual deactivation of Ni/AC-Ad prepared under alkaline conditions during catalytic steam reforming of toluene.
研究领域:
环境科学
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催化化学
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DOI
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 15
·3845-3853
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IF 7.779
Yongqiang Li,Quan Wang,Yuhua Ju,Yarong Li,Yanbo Zhang,Ronggui Hu
The development of novel materials with dual functions of simultaneous detection and removal of heavy metal ions has been an important pursuit of environmental remediation. Herein, we demonstrate that two-dimensional covalent organic frameworks (COFs) with well-defined functional chelating sites can combine the inherent advantages of COF materials to prepare novel materials with the dual functions of selective detection and effective removal of Ni2+ from aqueous solutions. A new pyridine-based COF material (TAPA–PCBA) containing functional N,N,N-chelating sites has been designed and synthesized by the imine condensation reactions between tris(4-aminophenyl)amine and 2,6-pyridinedicarboxaldehyde under solvothermal conditions. The newly designed TAPA–PCBA possesses high crystallinity, moderate specific surface area and robust chemical and thermal stability. These excellent properties of TAPA–PCBA, together with its extended π-conjugated framework structure and the dense distribution of functional N,N,N chelating sites, enable TAPA–PCBA to selectively detect and effectively remove Ni2+ from aqueous solutions. This dual function can be attributed to the coordination interactions between Ni2+ and N,N,N-chelating sites embedded in the skeleton structure of TAPA–PCBA. These results reveal that COFs with reasonable design have great development prospects in heavy metal ion related environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 6
·962
·
IF 2.467
Mohammed Awad Abedalwafa,Yan Li,De Li,Xiaojun Lv,Lu Wang
Driven by economic interests, the abuse of antibiotics has become a significant concern for humans worldwide. As one of the most commonly used antibiotics, oxytetracycline (OTC) residue in animal-derived foods occurs occasionally, which has caused danger to humanity. However, there is still no simple and efficient solution to detect OTC residue. Here, an easily-operated colorimetric strategy for OTC detection was developed based on nickel ions (Ni2+) immobilized carboxymethylcellulose/polyacrylonitrile nanofibrous membranes (Ni@CMC/PAN NFMs). Owing to numerous O- and N-containing groups OTC has a strong tendency to complex with Ni2+on the strips, inducing a color change from light green to yellow visible to the naked eye. The NFMs structural features, CMC functionalization process, and Ni2+immobilization amount was carefully regulated to assure OTC detection whilst maintaining the inherent characteristics of NFMs. With the benefits of the large specific surface area (SSA) and small pore size of NFMs, the strips not only exhibited a rapid response (2 min), and low detection limit (5 nM) but also performed with good reversibility and selectivity concerning OTC detection over other antibiotics. The successful development of such enchanting nanofibrous materials may provide a new comprehension into the design and improvement of colorimetric strips.Keywords:nanofibrous membranes;nickel ions;colorimetric strips;oxytetracycline detection
研究领域:
材料科学
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分析化学
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食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xuzhao Gao,Yueyang Xu,Yan Yin,Ning Gu,Yongping Zeng
The adsorption desulfurization technology presents remarkable advantages and is a promising method because of its affordability, gentle operating conditions. Metal-organic frameworks (MOFs) have garnered significant attention owing to their remarkable features, including large specific surface areas, pore volume and the designable structure. The hierarchical porous CuBTC-DMA was successfully synthesized by adding salicylic acid and using the hydrothermal method. Subsequently, Ni ions were introduced into the structure using ion-exchange method. It was found that the doping of salicylic acid and Ni ions did not significant alter the structure of the material. The new type of π-complexed adsorbent, Ni@HP-CuBTC-DMA, was prepared. The results of adsorption desulfurization experiments showed that Ni@HP-CuBTC-DMA-1.5(0.2 M) had the highest adsorption capacity, with the maximum adsorption amounts of 25.63 mg S/g and 41.06 mg S/g for thiophene and benzothiophene , respectively. In the toluene competition experiment, the adsorption amount of thiophene could still reach 19.25 mg S/g. The results of regeneration experiments demonstrate that Ni@HP-CuBTC-DMA-1.5(0.2 M) still has excellent adsorption capacity after four cycles.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Chen Ling,Zixi Ren,Mengmeng Wei,Fei Tong,Yuwei Cheng,Xiaopeng Zhang,Fuqiang Liu
Inorganic complexants, such as ammonia (AA) and pyrophosphate (PP), are often present alongside heavy metal ions in alkaline plating rinsing wastewater. We investigated the removal capacity of Ni(II) from waters containing [Ni-xNH 3 -yP 2 O 7 ] n complexes by chelating and ion-exchange resins in sole and dual-ligand systems. D463 (containing iminodiacetic groups) and PAMD (possessing polyamine groups) exerted superior performance under all conditions. Ni(II) adsorption on D463 decreased with AA and PP by 10.3% and 64.4%, respectively. Conversely, the adsorption on PAMD increased by 57.3% and 75.8%, respectively. PAMD exhibited high selectivity toward anionic [Ni-PP] species over free PP. More Ni(II) was captured by PAMD in the dual-ligand systems than sole systems, while the case for D463 was opposite. As confirmed by species tracking and DFT/XPS analyses, complexes breaking-Ni 2+ capture was the dominant mechanism for D463, while the dual-site (non-charged and protonated amines) interactions with NiP 2 O 7 2– on PAMD promoted its adsorption. The tandem combination D463-PAMD was the optimal mode to remove the most Ni(II). The actual wastewater test demonstrated that >210 BV effluent met the limit of 0.1 mg Ni(II)/L and the eluent contained 15 g Ni(II)/L. This study guides the application of chelating adsorption processes in the advanced treatment of plating rinsing wastewaters.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yuanyuan Cai,Zuoren Nie,Xiaoli Xi,Yajiao Zhang,Lu Deng,Zhiyong Zhao,Yingliang Tian
Separation and recovery of molybdenum (Mo) with high concentrations from spent catalysts is a strategy for avoiding the environmental footprint by metal mining and the disposal of hazardous wastes, while alleviating resource shortage. In this paper, a method for constructing a binary (SiO2–Na2O)/ternary (SiO2–Na2O–B2O3) glass phase extraction (GPE) system to selectively extract the impurity metal ions from spent catalysts as well as simultaneously separate and recover Mo is presented. Based on experimental studies and classical molecular dynamics simulations, compared with the binary glass network, 99.4% of Al3+ and Ni2+ in spent catalysts were extracted in a more stable tetra-coordinated form at a lower melting temperature (1200 °C) by the ternary GPE system introducing B2O3, accompanied by Na2MoO4 precipitated as the recovery product. The recovery efficiency of Mo was 98.1%, realizing an efficient separation and short-process recovery. Moreover, the separation of Na2MoO4 melt and glassy liquid during the melting process was visually observed online. Therefore, this approach of constructing glass GPE systems for the one-step separation of metals during the melting process is expected to contribute to the sustainable supply of critical metals.
研究领域:
材料科学
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环境科学
·
冶金工程
✓ 已验证
DOI
高影响因子
FUEL
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2018
·
IF 4.908
Jun Xu,Limei Chen,Tong Geng,Mannian Ren,Shizhong Wang,Zhijun Song,Fahai Cao
Nickels in crude oil often deactivate the hydrocracking and catalytic cracking catalysts. Strong acids are widely applied to remove these nickels, although they cause severe corrosion to the subsequent catalytic cracking and processing equipment. Polymer brushes bearing specific groups which can adsorb nickel ions are considered as desirable non-corrosive nickel removal agents. In this work, micro-sized spherical polymer brushes bearing imidazole groups (PVIm@SiO 2 ) are first applied to remove trace nickels in crude oil with the help of electric demulsification . The effects of polymer brushes concentration, oil/water ratio and electric demulsification temperature on nickel removal efficiency are investigated. Compared with the monomer (VIm) and polymer (PVIm) bearing imidazole groups, polymer brushes exhibit a much higher nickel removal efficiency than the other two, which is approximately 66.7%. In addition, the regeneration of polymer brushes are achieved by a rapid and simple process using diluted HCl. As well as, the removal efficiency of Ni remains 62.5% in 5 consecutive cycles. Consequently, these spherical polymer brushes bearing imidazole groups are reasonable nickel remover for crude oil.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 4
·882-891
·
IF 3.552
Fan Yiyi,Li Jinyong,Wang Saidi,Meng Xiuxia,Jin Yun,Yang Naitao,Meng Bo,Li Jiaquan,Liu Shaomin
Hydrogen fuel has been embraced as a potential long-term solution to the growing demand for clean energy. A membrane-assisted separation is promising in producing high-purity H 2 . Molecular sieving membranes (MSMs) are endowed with high gas selectivity and permeability because their well-defined micropores can facilitate molecular exclusion, diffusion, and adsorption. In this work, MXene nanosheets intercalated with Ni 2+ were assembled to form an MSM supported on Al 2 O 3 hollow fiber via a vacuum-assisted filtration and drying process. The prepared membranes showed excellent H 2 /CO 2 mixture separation performance at room temperature. Separation factor reached 615 with a hydrogen permeance of 8.35 × 10 −8 mol·m −2 ·s −1 ·Pa −1 . Compared with the original Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes, the permeation of hydrogen through the Ni 2+ -Ti 3 C 2 T x /Al 2 O 3 membrane was considerably increased, stemming from the strong interaction between the negatively charged MXene nanosheets and Ni 2+ . The interlayer spacing of MSMs was tuned by Ni 2+ . During 200-hour testing, the resultant membrane maintained an excellent gas separation without any substantial performance decline. Our results indicate that the Ni 2+ tailored Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes can inspire promising industrial applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Run Zou,Jun Xu,Sebastian Kuffner,Julian Becker,Tao Li,Xiang Guan,Xiaowan Zhang,Li Li,Martien A. Cohen Stuart,Xuhong Guo
Catalytic aquathermolysis in situ upgrading and reducing the viscosity of heavy oil in the reservoir remarkably enhances the recovery and is considered as a promising technology. However, the low catalytic efficiency and inferior dispersity in both water and oil limit its applications. In the present work, spherical polymer brush nanocatalysts were synthesized, in which nano-TiO2 is the core and poly(vinyl imidazole) (PVI)-loading nickel cations are polymer brushes. The chemical characteristics, polymer-grafting content, nickel-loading content, and morphology of as-prepared catalysts were characterized by infrared (IR) spectroscopy, thermogravimetric analysis, inductively coupled plasma optical emission spectrometry, scanning electron microscopy, and transmission electron microscopy. The polymerization degree of PVI was analyzed by proton nuclear magnetic resonance (1H NMR) spectra. The effects of the nickel-loading content, catalytic conditions, and hydrogen donor on the viscosity of heavy oil were studied. The results show that the heavy oil is catalytically cracked by the synthesized catalysts, which leads to the reduction of oil viscosity. The viscosity reduction is enhanced by the increase of the nickel-loading content, catalytic temperature, dosage of catalyst, and hydrogen donor. The rheological behaviors in terms of flow curve, thixotropy, viscoelasticity, and time dependence of cracked oil were studied. To explore the cracking mechanism, the four compositions of heavy oil before and after aquathermolysis were compared. The extracted asphaltenes and resins were further analyzed by elemental analysis, 1H NMR spectra, and IR spectroscopy. The organic compounds in reacted water were characterized by gas chromatography–mass spectrometry. It is found that the content of light saturates is much increased after aquathermolysis, along with the distinct decrease of resins. From the structure change of resins, such as the decrease of hydrogen/carbon and methylene/methyl ratios and increase of aromaticity and aromaticity condensation, the increased light saturates are due to the dissociation of alkyl side chains in resins. In addition, the aromaticity and aromaticity condensation in asphaltenes are found decreased, which is because of the fragmentation and depolymerization of large aromatics. Meanwhile, the loss of oxygen in both asphaltenes and resins is connected with the phenols found in the reacted water, indicating the breakage of the C–O bond and heteroaromatic ring-open reaction in both asphaltenes and resins during aquathermolysis.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2019
·
IF 7.913
Chao Shan,Bowen Yang,Bo Xin,Dandan Wang,Ping Huang,Zhicai Chen,Zhongbo Wei,Ming Hua,Weiming Zhang,Dionysios D. Dionysiou,Bingcai Pan
It has been long desired but challenging to forward the advanced treatment of wastewater from empirical trials towards scientific design due to the lack of molecular insight into the pollutants of concern. Herein, we first established a systematic methodology to identify the ligands of Ni(II)-complexes in an electroless nickel (EN) plating effluent. The presence of N-containing groups in the ligands of most Ni(II)-complexes was verified by time-aligned ICP-MS and ESI-HRMS, implying the suitability of autocatalytic ozonation for efficient decomplexation. Thereby, a combined process was proposed on the basis of ozonation to achieve over 83% decomplexation of Ni(II) (initially at 0.36 mg/L), followed by selective Ni(II) sequestration for resource recovery. Combinational LC-MS systems revealed the ozonation-induced fragmentation or elimination of most Ni(II)-complexes as well as the structural change of the residual complexed molecules. The released free Ni(II) was further sequestrated by a nanocomposite of hydrated Zr(IV) oxide confined in a polymeric cation exchanger (nHZO@PCE). The fixed-bed working capacity of nHZO@PCE (∼550 BV) for the ozonated EN plating effluent was over 18 times that of the cation exchanger host (∼30 BV) at the breakthrough point of 0.10 mg Ni/L. More attractively, five adsorption-regeneration cycles demonstrated the great potential of the hybrid adsorbent for sustainable utilization. This study is believed to shed new light on how to design rational processes for advanced treatment of real wastewater based on molecular identification.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2012
·Vol. 177
·期 1
·195-200
·
IF 3.033
Iqbal Jibran,Yin Changhai,Geng Jinpei,Li Xiaoyu,Li Xiuyong,Du Yiping,Liu Bing Xiang
We report on a simple, sensitive and selective method for the spectrophotometric determination of Ni 2+ in water samples. The analyte ions were collected on a membrane filter in the form of their red complex with 1-(2-pyridylazo)-2-naphthol (PAN), and the absorption spectra of the colored membrane filters were acquired. Effects of pH value, sample volume, and amount of PAN were examined in order to optimize sensitivity. The interference by common other ions was eliminated using appropriate masking agents. The absorbance is linearly related to the concentration of Ni 2+ in the ranges from 0.3 to 1.5 μg L −1 , and from 2 to 10 μg L −1 , respectively, the correlation coefficients (R 2 ) being 0.9871 and 0.9954. Under the optimal conditions, the detection limit is 0.1 μg L −1 . The recoveries in case of spiked samples are between 95.0% and 101.5%, and the relative standard deviations range from 2.8% to 4.1%.
Direct ultra-sensitive spectrophotometric determination of Ni 2+ as Ni-PAN complex on membrane filters
研究领域:
分析化学
·
环境科学
✓ 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）