Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Yiyun Cao,Lvji Yan,Bichao Wu,Dun Wei,Baixue Ouyang,Peng Chen,Tingzheng Zhang,Haiying Wang,Lei Huang
The contamination of aquatic ecosystems has resulted in significant health and environmental ramifications. The removal of pollutants from wastewater poses a significant challenge for water purification, requiring innovative and efficient technologies to ensure the protection of human health and the environment. Recently, capacitive deionization (CDI) has garnered significant attention as a cost-effective and user-friendly water purification process. The development of high-performance electrode materials plays a pivotal role in CDI systems, serving as the primary approach to achieve enhanced adsorption capacity for contaminant ions and expedited ion removal rates. This study employs specifically designed organic framework structures, which are subjected to pyrolysis to facilitate the integration of cobalt nanoparticles within a carbon matrix, resulting in enhanced exposure to active sites. Revolving around its distinctive exposed structure, it exhibits exceptional electrochemical performance alongside remarkable ion removal capabilities. The adsorption capacity of anions, specifically chloride ions (500 ppm), reached 152 mg∙g −1 . Additionally, the removal efficiency for low concentrations of cations such as lead ions (40 ppm) and chromium ions (20 ppm) was found to be 91.83% and 60.82%, respectively. Therefore, this study presents a novel approach for the elimination of ions from wastewater.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Jia Wen,Xiaohong Hu
Recently, the developments of MOFs and their applications on heavy metal removal have attracted much attention. In this paper, we focused on the influence of co-existing ions on the adsorbability of epigallocatechin gallate (EGCG) modified ZIF-8 in a multi-metal system (Cd(II), Cu(II), Ni(II), and Cr(VI)). It was found that the adsorption of Cd(II), Cu(II), Ni(II), and Cr(VI) on the ZIF-8-EGCG fitted well with the pseudo second-order kinetic model and Langmuir isotherm. The adsorption selectivity of ZIF-8-EGCG in the mixed metal solution followed the order of Cu(II) ≫ Cr(VI) > Cd(II) > Ni(II). Besides, Cu(II) was the most attractive substance with a maximum capacity of 232.97 mg·g −1 . Copper also disturbed the adsorption of Cd(II) and Ni(II) and contributed the most to the Cr(VI) removal. The natural anions (e.g., Cl − , NO 3 – , AsO 2 − , SO 4 2− ) significantly impeded Cr(VI) adsorption, while low concentrations of natural cations (e.g., K + , Na + , Ca 2+ , and Mg 2+ ) facilitated the adsorption of Cd(II), Cu(II) and Ni(II).
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
·
IF 2.694
Kuo Zhou,Xingfan Wang,Junfang Yang,Fenli Jin,Huan Zhou
The solubility equilibrium of Li+, Na+//Cl–, CO32– −H2O quaternary systems at 323.15 K and 348.15 K was studied via the isothermal solubility equilibrium method, and the complete phase diagrams were obtained including the properties of liquid density and pH. Solid species of LiCl·H2O, Li2CO3, NaCl, and Na2CO3·H2O are found in the quaternary system at 323.15 K and 348.15 K, and one double salt of Li2CO3·Na2CO3 is found at 348.15 K. The liquid phase of two invariant points and five univariant curves at 323.15 and three invariant points and seven univariant curves at 348.15 K in the quaternary system is determined. Li2CO3 covers the largest solid phase region and is hardly influenced by temperature; Li2CO3–NaCl is a stable salt pair, and its cosaturated solubility is the least at the diagonal line of Li2CO3–NaCl.
研究领域:
化学
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材料科学
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DOI
高影响因子
Journal of the American Chemical Society
·
2018
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IF 14.357
Mei-Ling Feng,Debajit Sarma,Yu-Jie Gao,Xing-Hui Qi,Wei-An Li,Xiao-Ying Huang,Mercouri G. Kanatzidis
Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+, and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2), which present excellent ion exchange properties for [UO2]2+, Cs+, and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+, and Sr2+ ions (qmU = 196 mg/g, qmCs = 164 mg/g, and qmSr = 80 mg/g for FJSM-GAS-1, qmU = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO2]2+ ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO2]2+ in the pH range of 2.9–10.5. Moreover, the sulfide compounds could maintain high distribution coefficients KdU even in the presence of excess Na+, Ca2+, and HCO3–. The distribution coefficient KdU of 6.06 × 106 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO2]2+-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and γ radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.
研究领域:
环境科学
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材料科学
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核化学
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DOI
PubMed
高影响因子
TALANTA
·
2016
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IF 4.035
Haiyang Liu,Bibo Zhang,Chunyan Tan,Feng Liu,Jiakun Cao,Ying Tan,Yuyang Jiang
A simple Schiff base (BMSA) prepared from salicylaldehyde and 2-(1H-benzo[ d ]imidazol-2-yl)aniline was evaluated as an efficient fluorescent chemosensor for the selective recognition of Al 3+ and Cu 2+ over other common metal ions . This sensor could detect Al3 + in CH 3 OH/PBS with distinct emission red-shift (the detection limit 0.31 μM)and Cu 2+ in CH 3 OH/Tris-HCL (the detection limit 0.54 μM) with obvious fluorescence quenching . The obtained BMSA-Al 3+ and BMSA-Cu 2+ complexes could act as cascade sensors for detecting F − and S 2− , respectively. The recognizing behavior of BMSA toward Al 3+ and Cu 2+ has been investigated in detail through Job's Plot, FT-IR NMR , and HRMS analysis. Moreover, this chemosensor was verified to be of low cytotoxicity and good imaging characteristics for the detection of Al 3 + and Cu 2+ , and further for the recognition of F − and S 2− in living cells, suggesting that BMSA was proved to be a useful tool for tracking Al3 + /Cu 2+ and F − /S 2− ions in vivo .
研究领域:
生物化学
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分析化学
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细胞生物学
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DOI
高影响因子
Journal of Energy Chemistry
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2020
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IF 7.216
Yansi Tong,Danhua Yuan,Wenna Zhang,Yingxu Wei,Zhongmin Liu,Yunpeng Xu
EAB zeolite was successfully prepared and applied to selective adsorption of Li + , Na + and K + ions. The physical and chemical properties of the adsorbent were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscope (SEM) and thermogravimetry (TG) methods. The ion exchange behaviours for Li + , Na + and K + ions in monomcomponent and multicomponent solutions were studied. In independent ion exchange, the ion exchange capacities ratios α (Na/Li) and α (K/Li) were 3.8 and 6.2, respectively. In competitive ion exchange, the selectivities β (Na/Li) and β (K/Li) increased with the initial concentrations and reached 409 and 992 when the initial concentrations was 100 mmol/L. The thermodynamic study results showed that Gibbs free energy change (Δ G Θ ) of ion exchange reaction between Li-EAB and K + was −34.96 kJ/mol, indicating that ion exchange of K + ions was more energetically favourable than Li + ions. The calculation results showed that the energy barriers of ion exchange increased in the order K + < Na + < Li + . The study shows that EAB zeolite is potential to be used in the separation of alkali ions.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
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IF 5.256
Hao-Hua Deng,Xiang-Yu Fang,Kai-Yuan Huang,Shao-Bin He,Hua-Ping Peng,Xing-Hua Xia,Wei Chen
Although numerous sensors have been successfully fabricated for the detection of various heavy metal ions by employing fluorescent gold nanoclusters (AuNCs) as nanoprobes, serious cross-interference often occurs when these ions coexist in samples, which results in glaring errors in quantification. In this study, glutathione-protected AuNCs (GSH-AuNCs) were synthesized and found to respond to both Cu 2+ and Hg 2+ via fluorescence suppression. Intriguingly, addition of Ag + to GSH-AuNCs could completely inhibit the quenching effect of Hg 2+ while not affecting the Cu 2+ -mediated quenching process. Ag + can combine with Au + on the surface of AuNCs to form a strong Ag + -Au + metallic bond , which disrupts the interaction between Hg 2+ and Au + and thus eliminates the corresponding quenching effect. Based on this phenomenon, a simple sensing approach for highly selective and sensitive detection of Cu 2+ in aqueous solution was developed using the GSH-AuNC/Ag + complex as a fluorescent turn-off nanoprobe. The proposed method exhibited good linearity in the concentration range 0.02–10 μM with a limit of detection of 12 nM. This assay was demonstrated to be suitable for determination of Cu 2+ in real water samples even in the presence of Hg 2+ , showing great promise as a tool for assessment of environmental security and drinking water quality.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2023
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IF 2.6
Jie Yang,Huan Zhou,Jie Li,Cunbing Xu,Yifan Li,Sifan Wang,Jiangbo Chen
The solid–liquid phase equilibria of the Ba2+//Cl–, S2–, and OH––H2O quaternary system and its three subternary systems at 298.15 K are studied via the isothermal solubility phase equilibrium method. The solubility data, liquid properties of density and pH, and phase diagrams of the ternary and quaternary systems are obtained. Solid species of Ba(OH)2·8H2O, BaCl2·2H2O, Ba(OH)Cl·2H2O, and BaS exist in the quaternary system and corresponding ternary systems at 298.15 K. The four solid species build up two invariant points, one disproportionate and one proportionate, and four phase regions. The largest phase area is covered by Ba(OH)·8H2O, and the lowest water point is the proportionate invariant point saturated by BaCl2·2H2O, Ba(OH)Cl·2H2O, and BaS.
研究领域:
化学
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Li-Rong Guo,Guo-Liang Nie,Rui-Zhi Cui,Wu Li,Yong-Ming Zhang
In addition to the common sodium salt, potassium salt, magnesium salt, and sulfate, salt lake brine is also rich in trace components in varying degrees, such as lithium, bromine, rubidium, cesium, and so forth, which is of great industrial value. These trace components are further concentrated and enriched in old brine during the process of evaporation and concentration of brine resources. In view of the coexistence characteristics of lithium, potassium, bromine, and other ions in old halide, the phase equilibria of quinary system Li+, Na+, K+/Br–, and SO42––H2O were studied by the isothermal dissolution equilibrium method at 298.15 K. The solubility data of the equilibrium liquid phase were measured, and the compositions of the solid phase as well as the crystal forms of the equilibrium solid phase were identified when the equilibrium was achieved. The corresponding 3D and dry-base phase diagrams (Na2SO4·10H2O, K2SO4, LiBr·2H2O, Li2SO4·H2O, KBr, and NaBr·2H2O saturated) were drawn based on the phase equilibrium experimental data. The research results of phase equilibria and phase diagrams reveal that the phase relations and crystallization–dissolution law of each component in solution lay a certain foundation for further research on multi-temperature phase equilibrium and thermodynamic properties of the high-component brine system and to provide basic thermodynamic data for guiding the rational development and comprehensive utilization of brine resources.
研究领域:
化学
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材料科学
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资源与环境科学
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 55
·33299-33306
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IF 3.119
Rentian Guan,Lixia Tao,Yingying Hu,Cong Zhang,Yongping Wang,Min Hong,Qiaoli Yue
In this work, a fluorescence method was developed for selective detection of Ag+ in the presence of Cd2+, Hg2+, and Cu2+ based on gold nanoclusters (AuNCs). That is, bovine serum albumin (BSA) templated AuNCs with double emission peaks were synthesized using BSA as a protective agent. AuNCs with uniform distribution and average size between 2.0 and 2.2 nm were synthesized using a green and simple method, and showed bright orange-red fluorescence under ultraviolet light. AuNCs have two emission peaks at 450 nm and 630 nm with an excitation wavelength of 365 nm. Under alkaline conditions, Cd2+ can combine with the surface sulfhydryl groups of BSA–AuNCs to form Cd–S bonds, which cause AuNCs to aggregate, resulting in an increase in fluorescence intensity at 630 nm. Conversely, due to the d10–d10 metal affinity interaction, the addition of Hg2+ can reduce the fluorescence peak at 630 nm. Ag+ was reduced to Ag0 by gold nuclei in AuNCs, forming a stable hybrid Au@ AgNCs species with blue-shifted and enhanced fluorescence. Finally, the paramagnetic behavior of Cu2+ combined with BSA causes the excited electrons of the gold cluster to lose their energy via ISC, eventually leading to simultaneous quenching of the two emission peaks. The results show that the limit of detection (LOD) of Ag+, Hg2+, Cd2+ and Cu2+ is 1.19 μM, 3.39 μM, 1.83 μM and 5.95 μM, respectively.
研究领域:
分析化学
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材料科学
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生物化学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2018
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IF 4.427
Yue Li,Li Wei,Wen Zhang,Zhiqiang Dong,Yuping Qiu
Sorption of ionic liquids (ILs) to soil and porous materials as affected by anions was observed, but scarce effort has been focused on addressing the role of counteranions in sorption and the associated underlying mechanisms. In this work, two series of 1-butyl-3-methylimidazolium- (Bmim-) and N -butyl, methyl-benzimidazolium-based (Bmbim-based) ILs coupled with different counteranions were prepared to investigate the effect of anions on IL sorption by soot. The octanol–water partition coefficient ( K ow ) and the ion-pair formation constant at infinite dilution in water ( K IP ° ) of ILs were independently measured to explore the contribution of counteranion-dependent hydrophobicity and ion-pair. A wide range of sorption coefficients ( K d ) of ILs were achieved with values varying from 59.8 to 344.3 L·kg −1 for Bmbim-based ILs and from 253.4 to 489.7 L kg −1 for Bmbim-based ILs. Compared with other anions, bis(trifluoromethanesulphonyl)imide ([Tf 2 N] – ) and hexafluorophosphate ([PF 6 ] − ) exhibit tighter association with IL cations in aqueous solution due to their larger K ow and higher K IP ° . Positive linear relationships between log K IP ° and K d and between log K ow and K d evidenced that the counteranion-dependent sorption of ILs relies on the association strengths of IL cations and counteranions, which further influence the hydrophobicity/hydrophilicity of ion pairs. Compared with that of strongly coordinating anions (such as [CH 3 SO 3 ] − , [CF 3 COO] − , [BF 4 ] − , [CF 3 SO 3 ] − , and [Cl] − ), the addition of weakly coordinating anions (such as [Tf 2 N] – and [PF 6 ] – ) in solution contributes to markedly large sorption enhancement of ILs. Consequently, the contribution of different counteranions on IL sorption is essentially based on the formation of ion pair with different K IP ° and K ow in aqueous solution.
研究领域:
环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2025
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IF 10.9
Fei Han,Yaohui Xie,Lin Qu,Zhenzhou Wang,Wei Zhang,Guang Yang,Huiqin Hu,Meiting Huang,Haoxuan Yu,Liming Yang,Xubiao Luo
Deep removal of trace aluminum from lithium extraction slag (LES) is key to recovering high-purity battery-grade iron phosphate (FePO 4 ). Existing methods exhibit low aluminum removal due to the close solubility product constants of Al (III) and Fe (III). In this work, we propose a novel strategy for trace aluminum removal based on fluoride ion-mediated differential coordination of Al (III) and Fe (III). Through precise control of fluoride ion concentration in phosphoric acid solution, iron preferentially precipitates while aluminum predominantly forms soluble fluoride complexes. This distinct behavior enables precise elemental separation through fluoride content optimization. The developed separation technology achieved aluminum removal rate of 98.89 %. It is noteworthy that the aluminum content of precipitated FePO 4 is below 30 ppm, which meets the standard of battery-grade. This work provides a viable technical pathway for the industrialization of Al/Fe separation in the lithium extraction slag leachate and the regeneration of low-Al, high-purity FePO 4 .
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
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