NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 4
·3821-3832
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IF 3.277
Yan Liu,Fangfang Liu,Minjia Meng,Zhanchao Liu,Liang Ni,Guoxing Zhong
In this study, a Ni(II) ion imprinted polymer (Ni(II)-IIP) based on macroporous–mesoporous silica (MMS) was optimally synthesized using a response surface methodology (RSM) approach for enhanced dynamic adsorption capacity. The MMS was prepared via dual-templating routes employing liquid crystalline surfactants and polystyrene beads to improve mass transfer and reduce transport limitations. With dynamic adsorption capacity for Ni(II) as the response, the effects of four variables, i.e. the amount of S,S′-bis(α,α′-dimethyl-α′′-acetic acid)trithiocarbonate (BDAAT), the consumption of acrylamide (AM), the reaction time and the dosage of 2,2′-azobisisobutyronitrile (AIBN), were investigated to solve the complex synthesis process. The predicted appropriate preparation conditions were as follows: BDAAT dose 0.07 g, AM dose 0.029 g, reaction time 6.3 h, and AIBN dose 4.54 mg, under which a Ni(II)-IIP was prepared and used as an adsorbent to remove Ni(II), obtaining the maximum dynamic adsorption capacity (12.96 mg g−1). The significance of independent variables and their interactions was studied to explain the specific adsorption question. In addition, the resulting Ni(II)-IIP was performed without any obvious deterioration after five repeated cycles.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Feiyu Gao,Chaowen Tan,Yang You,Yong Hou,Hongyan Yan,Xuewei Lv,Jie Dang
The imperative need for efficient and selective adsorption of Ni(II) and Mo(VI) is crucial for resource utilization and environmental protection. However, this process faces a challenge due to the scarcity of adsorbents that can adeptly adsorb both metal ions simultaneously. To address this, this study introduces a novel composite adsorbent material, denoted as BECZN, achieved through composite cross-linking of waste orange peel biochar with in situ aminated cobalt/zinc-zeolitic imidazolate frameworks (Co/Zn-ZIF-NH 2 ). The incorporation of Co/Zn-ZIF-NH 2 enhances the availability of active groups within BECZN. The aerogel structure of BECZN prevents ZIF material collapse and agglomeration, thereby improving active site exposure. BECZN exhibits notable adsorption capacities, reaching 151.84 mg/g for Ni(II) at pH = 7 and 842.54 mg/g for Mo(VI) at pH = 3. Further investigations indicated that the adsorption of Ni(II) and Mo(VI) obeys the Langmuir isotherm model, while exhibiting pseudo-second-order kinetics and intraparticle diffusion characteristics. Notably, BECZN selectively adsorbs Ni(II) and Mo(VI) efficiently under acidic and neutral conditions, respectively. It can maintain high capacity under the interference of various cations and anions. Meanwhile, this excellent selective adsorption of Ni(II) and Mo(VI) by Co/Zn-ZIF-NH 2 is revealed at the atomic level using density functional theory (DFT) calculations. This study offers a theoretical basis and experimental reference for the design and synthesis of ZIF and biomass-based composite adsorbents.
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JOURNAL OF MOLECULAR STRUCTURE
·
2015
·
IF 1.602
Hu Wang,Xiangmin Meng,Chuanbin Fan,Yuhua Fan,Caifeng Bi
A new complex, Ni(C 22 H 26 N 2 O 10 S 2 )·2CH 3 OH, with a sexidentate (N 2 O 4 ) symmetric bis-Schiff base ligand (C 22 H 26 N 2 O 10 S 2 = 1,2-bis(2-methoxy-6-formylphenoxy)ethane-2-aminoethane-sulfonic acid) has been synthesized and characterized by physico-chemical and spectroscopic methods . The X-ray crystal structure shows that the Ni(II) atom of the complex is six-coordinated by two nitrogens from C N groups, two oxygens from ether groups and two hydroxyl oxygens from sulfonic acid groups in the mono-ligand, forming a distorted octahedral geometry. Theoretical study of the complex is carried out by density functional theory (DFT) method and the B3LYP method employing the 6-3l+G* basis set. Moreover, the complex proved to be good candidate for the photocatalytic degradation of methylene blue .
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Weiguang Wang,Gequn Shu,Hua Tian,Xiuping Zhu
The treatment of heavy metal ions in wastewater is of great significance for protecting the environment and human health. To improve the power density and removal efficiency of thermally regenerative ammonia electro-deposition battery and expand the concentration range of effective wastewater removal, a new method for removing Cu(II), Co(II), Ni(II) and Ag(I) from wastewater while generating high-power electric energy by using waste heat, called bimetallic thermally regenerative electro-deposition battery (B-TREB), was constructed in this work. For Cu(II)-containing wastewater with a wide concentration range of 0.002–0.3 M, the removal efficiency (RE) of Cu/Zn-TREB could reach more than 90%. With the initial concentration of Cu(II) being increased from 0.0005 to 0.3 M, the peak power density was enhanced from 20 to 546 W m −2 . Besides, for 0.01 M and 0.1 M Co(II) wastewaters, the REs of Co/Zn-TREB were 85% and 90%, respectively. The RE of Ni/Zn-TREB was 88% for 0.01 M Ni(II) wastewater. These results illustrated that B-TREBs could remove many kinds of heavy metal ions in the wastewaters while maintaining a high removal efficiency of ~90% over a wide concentration range, and the produced high-power electricity could provide energy for further treatment or other uses.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2018
·
IF 2.795
Shuping Wu,Fan Wang,Haikuan Yuan,Lijuan Zhang,Shimin Mao,Xijian Liu,Njud S. Alharbi,Sohrab Rohani,Jie Lu
A novel xanthate-modified chitosan/poly( N -isopropylacrylamide) (X-CS/NIPAAm) composite hydrogel was fabricated by a facile two-step method for the selective adsorption of Cu(II), Pb(II) and Ni(II) metal ions from aqueous solutions. The equilibrium adsorption data fitted well to the Langmuir model and the adsorption kinetic data followed the pseudo-second-order model. The maximum equilibrium adsorption capacities of composite hydrogel to Cu(II), Pb(II) and Ni(II) at 293 K were about 115.1, 172.0 and 66.9 mg g −1 , respectively. The thermodynamics parameters showed that the adsorption processes to Cu(II), Pb(II) and Ni(II) were spontaneous and exothermic. The interactions between metal ions for multi-components systems were evaluated by the values of Q b /Q s and Q t /Q s . The adsorption mechanism was analyzed by XPS spectra and the Hard–Soft, Acids–Bases (HSAB) theory. The X-CS/NIPAAm composite hydrogel could be regenerated and repeatedly utilized at least five cycles without obvious adsorption capacity loss.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 3
·927-934
·
IF 4.58
Liu Xiaolan,Suo Feiya,He Man,Chen Beibei,Hu Bin
Monoliths composed of poly(1-vinylimidazole-ethylene glycol dimethacrylate), referred to as poly(VI-EGDMA), were modified with imidazole groups and used in capillary microextraction (CME) of trace levels of Co(II), Ni(II) and Cd(II) ions from human urine samples. The effects of sample pH, sample flow rate, sample volume, elution conditions and potentially interfering ions were investigated. Under the optimized conditions, the limits of detection (3σ) are 0.6 ng L −1 for Co(II), 6.4 ng L −1 for Ni(II) and 0.7 ng L −1 for Cd(II), with the relative standard deviations of 1.8 (Co), 4.2 (Ni) and 2.2% (Cd). A Certified Reference Material (ZK018–2, lyophilized human urine) was analyzed to validate the method, and the values found were in good agreement with the certified ones. The method was successfully applied to the analysis of trace Co, Ni and Cd in human urine samples, and the recoveries for spiked samples were in the range from 89% to 105%. The one-step preparation of monolithic material in our perception is an attractive feature for this material which also excels by good extraction performance in that it possesses abundant adsorption sites, good stability and a long lifetime.
Two poly(1-vinylimidazole-ethylene glycol dimethacrylate) monolithic capillaries were combined with ICP-MS to improve the analytical speed and used for the analysis of Co(II), Ni(II) and Cd(II) in human urine samples.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yipeng Wang,Kun Wang,Xuchan Wang,Qingliang Zhao,Junqiu Jiang,Ruiyuan Xue,Luzi Yuan
Heavy metals (HMs) in wastewater, including Cd, Pb and Ni, were toxic and needed urgent treatment. Using biochar as an adsorbent to purify HM-containing wastewater is effective. However, there are few studies on screening of high-efficiency modifier and comparing their adsorption capacity. Herein, three different modification methods, including heteroatomic doping (urea), alkali hydroxide (NaOH) and chemical oxidation (KMnO 4 ), were used to improve removal ability of HMs by biochar. The difference in impregnation solution resulted in completely differences in microscopic morphology, physicochemical properties and adsorption efficiency of modified biochar. Biochar modified by KMnO 4 (Mn-BC) had significantly better adsorption capacity for Cd, Pb and Ni, reaching 46.40 mg/g, 80.20 mg/g and 18.65 mg/g, respectively, compared with raw biochar and other modification biochar, which might be due to the highest surface area and pore volume, lower zeta potential and loaded MnO x onto Mn-BC surface. Chemical and monolayer adsorption was dominant during adsorption of HMs. After adsorption, HMs were detected on the Mn-BC surface in the form of carbonate, hydroxide or oxide. Mineral precipitation and cation exchange were the dominant mechanisms during adsorption, accounting for 17.4%-41.8% and 43.0%-77.2%, respectively. Moreover, according to the correlation analysis, the increase in biochar pH, pore volume and degrees of carbonization were beneficial for HM adsorption. Mn-BC could adapt to a wider pH range (pH=4–6), and its adsorption capacity would not be interfered by coexisting ions (50 mg/L). This research proved advantages of biochar with KMnO 4 modification and highlighted its application in treatment of wastewater contaminated with multiple HMs.
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Arabian Journal of Chemistry
·
2023
·
IF 6
Min Hou,Hou Cong Li,Ning An,Wen Ge Li,Jing Tong
Three metal complexes [Cu(HL)Cl](C 2 H 5 OH) 2 ] (complex 1), [Ni 4 L 2 (CH 3 COO) 4 (C 2 H 5 OH) 4 ] (complex 2) and [CoHL 2 ] (complex 3) based on 2,3-dihydroxybenzaldehyde-2-(2-aminophenyl)benzimidazole Schiff base (H 2 L) were synthesized by solvothermal reaction. The three complexes were characterized by FT-IR spectrometer, elemental analysis, thermogravimetric analysis, and X-ray single-crystal diffraction. X-ray single-crystal diffraction analysis confirmed that complex 1 belongs to monoclinic crystal system with P 2 1 /c space group, and complex 3 crystallizes in trigonal crystal system with R-3 space group. However, complex 2 crystallized in triclinic crystal system with P-1 space group and exhibits centrosymmetric tetranuclear crystallographic structure. Besides, MTT assay was studied antitumor activities against different tumor cells. The results show that the three complexes all have fine anticancer activities. Among them, complex 2 has significantly better anticancer properties against CNE-2Z cells than that of cisplatin. Finally, apoptosis and cell migration were studied to prove that complex 2 could inhibit tumor cells from proliferating in the manner of apoptosis and migration.
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JOURNAL OF COORDINATION CHEMISTRY
·
2013
·
IF 1.801
Zhong-Ming Yang,Hui Zhu,Juan Sun,Shao-Song Qian,Meng-Na Cai,Hai-Liang Zhu
Five new Cu(II), Zn(II), and Ni(II) 3-(4-nitrophenyl)acrylic acid complexes were synthesized and evaluated for inhibitory activity on jack bean urease. All five complexes were structurally determined by single crystal X-ray analysis. Compared with the positive reference acetohydroxamic acid (IC50 = 13.25 μM), Cu(II) complexes 3 and 4 showed the strongest inhibitory activity against jack bean urease (IC50 = 1.23 and 1.17 μM). Ni(II) and Zn(II) complexes also exhibited inhibitory activities (IC50 = 10.09–13.10 μM).
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LANGMUIR
·
2026
·
IF 4.4
Xiangui Liu,Chenwei Wang,Ming Cheng,Jianan Lian,Shi Feng,Shuo Yang,Ye Wu,Wenlong Yang
Abstract A highly selective fiber-optic surface plasmon resonance (SPR) sensor was developed for trace detection of Ni2+. A gold nanolayer was deposited onto a single-mode optical fiber, yielding a refractive index sensitivity of 1925.9 nm/RIU. An alkaline MXene/layered double hydroxide (alk-MXene/LDH) hybrid structure was subsequently fabricated via mechanical self-assembly using a two-dimensional Ti3C2 MXene substrate and immobilized on the SPR sensing interface for selective Ni2+ detection. Benefiting from the layered structure of LDH and the abundant oxygen-containing functional groups on MXene, the composite effectively adsorbs and enriches Ni2+, thereby enhancing the sensing response. The sensor exhibits a sensitivity of 4.7 nm/(μg·mL–1) over a concentration range of 0–4 μg/mL with a limit of detection of 5.6 × 10–2 μg/mL. These results demonstrate its applicability for trace heavy metal ion detection in environmental and industrial water systems and provide a strategy for the development of high-performance, cost-effective sensing platforms.
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Desalination and Water Treatment
·
2025
·
IF 1
Jingyi Chen,Chunyu Ji,Junsheng Liu,Jie Zhang
A series of new PMDA@CS/PVA composite membranes were fabricated by the crosslinking of pyromellitic dianhydride (PMDA) with chitosan (CS) and poly(vinyl alcohol) (PVA) in the presence of glutaraldehyde (GA) as a crosslinking agent. While, their adsorptions for Cu(II), Co(II), and Ni(II) in a single- and multiple mixed solutions were investigated. It was found that the incorporation of PMDA in the membranes can significantly enhance the adsorption capacity of membranes for these metals. The fitting of kinetic modeling s showed that the sorption manner of Cu(II), Co(II) and Ni(II) on the membranes obeyed the quasi-2nd kinetic modeling, indicating that it was dominated by chemisorption. The kinetic rate constants K 2 of membranes A-E for Cu(II), Co(II), and Ni(II) were in the region of 0.005–0.02, 0.026–0.082, and 0.002–0.053 [g/(h·mg)], respectively. The fitting of sorption isotherm modeling followed the Langmuir isotherm equation and the maximal Langmuir adsorption capacities for Cu(II), Co(II), and Ni(II) could reach 36.466, 32.119, and 30.916 mg/g, respectively. In addition, in the multi-component solutions, these membranes exhibited better selection for Cu(II) in Cu(II), Co(II), and Ni(II) mixed solutions. Moreover, it can be recycled five times when an EDTA was used as a de-sorbent. The exploration based on statistical physics principle confirmed that the adsorption of these membranes for Cu(II) is a mono-ion manner. These findings suggest that PMDA@CS/PVA composite membranes are promising sorbents for the removal of toxic metal ions from waste vehicle power batteries or metal-bearing wastewater.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Qiyuan Zheng,Zuoying Cao,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Guiqing Zhang
As the production and consumption of lithium-ion batteries increase, high purity Ni(II) and Co(II) products are becoming increasingly critical as key raw materials for battery cathodes. However, the clean and efficient separation of Ni(II) and Co(II) has been a bottleneck problem since they often coexist in ores and secondary resources and have similar ionic radii, oxidation states, and coordination numbers. Thus, this paper proposes a novel extractant (NNPA) and a breakthrough method to separate Ni(II) and Co(II). The effects of chloride ion concentration , pH value, temperature, O/A ratio and extraction time on extractant selectivity and extraction efficiency were investigated. Under optimum conditions, NNPA demonstrated high extraction ability (E = 94.6 %) and selectivity (β Ni(II)/Co(II) = 481) for Ni(II) at pH 0, whereas at pH 6, it has high extraction ability (E = 93.9 %) and selectivity (β Co(II)/Ni(II) = 510.88) for Co(II). To provide in-depth insights into the Ni(II) and Co(II) separation mechanism, based on the single crystal XRD analyses of the extracted Ni(II) complex and the extracted Co(II) complex, DFT calculations were performed. The results show that the extraction order of NNPA is NNPANiHCl 3 > NNPACoCl 2 > NNPANiCl 2 (H 2 O) 2 . Due to the different selectivity of NNPA towards Ni(II) or Co(II) at different pH values, it is able to greatly reduce the consumption of extractant and significantly shorten the extraction process flow by selectively extracting the low concentration Ni(II) or Co(II) from Ni(II)-Co(II) solutions, thereby improving efficiency, reducing energy consumption and achieving cleaning production.
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