Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

2019 ◽  
Vol 2019 (39-40) ◽  
pp. 4345-4349 ◽  
Author(s):  
Elena B. Yudina ◽  
Alexander E. Aleksenskii ◽  
Irina G. Fomina ◽  
Alexander V. Shvidchenko ◽  
Dmitry P. Danilovich ◽  
...  
Keyword(s):  
Metal Ions ◽  
Rare Metal ◽  
Detonation Nanodiamonds ◽  
Carboxyl Groups

scholarly journals Hairy Fluorescent Nanospheres Based on Polyelectrolyte Brush for Highly Sensitive Determination of Cu(II)

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 577 ◽  
Author(s):  
Qiaoling Wang ◽  
Kaimin Chen ◽  
Yi Qu ◽  
Kai Li ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Coupling Method ◽  
Carboxyl Groups ◽  
Particle Sizes ◽  
Carboxyl Content ◽  
High Brightness ◽  
Highly Sensitive ◽  
Sensitive Determination ◽  
Content Range

Currently, it is an ongoing challenge to develop fluorescent nanosphere detectors that are uniform, non-toxic, stable and bearing a large number of functional groups on the surface for further applications in a variety of fields. Here, we have synthesized hairy nanospheres (HNs) with different particle sizes and a content range of carboxyl groups from 4 mmol/g to 9 mmol/g. Based on this, hairy fluorescent nanospheres (HFNs) were prepared by the traditional coupling method (TCM) or adsorption-induced coupling method (ACM). By comparison, it was found that high brightness HFNs are fabricated based on HNs with poly (acrylic acid) brushes on the surface via ACM. The fluorescence intensity of hairy fluorescent nanospheres could be controlled by tuning the content of 5-aminofluorescein (5-AF) or the carboxyl groups of HNs easily. The carboxyl content of the HFNs could be as high as 8 mmol/g for further applications. The obtained HFNs are used for the detection of heavy metal ions in environmental pollution. Among various other metal ions, the response to Cu (II) is more obvious. We demonstrated that HFNs can serve as a selective probe and for the separation and determination of Cu(II) ions with a linear range of 0–0.5 μM and a low detection limit of 64 nM.

Carboxyl groups of citric acid in the process of complex formation with bivalent and trivalent metal ions in biological systems

2018 ◽  
Vol 182 ◽  
pp. 37-47 ◽  
Author(s):  
Michał Zabiszak ◽  
Martyna Nowak ◽  
Katarzyna Taras-Goslinska ◽  
Małgorzata T. Kaczmarek ◽  
Zbigniew Hnatejko ◽  
...  
Keyword(s):  
Citric Acid ◽  
Complex Formation ◽  
Metal Ions ◽  
Biological Systems ◽  
Carboxyl Groups ◽  
Trivalent Metal ◽  
Trivalent Metal Ions

scholarly journals Preparation of a Novel Polystyrene-Poly(hydroxamic Acid) Copolymer and Its Adsorption Properties for Rare Earth Metal Ions

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1905 ◽  
Author(s):  
Xiaoyan Cao ◽  
Qing Wang ◽  
Shuai Wang ◽  
Ruilin Man
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Surface Area ◽  
Hydroxamic Acid ◽  
Earth Metal ◽  
Rare Metal ◽  
Rare Earth Ions ◽  
Area Measurement ◽  
Bet Surface Area ◽  
Acid Copolymer

In this study, a novel polystyrene-poly(hydroxamic acid) copolymer was synthesized as an effective adsorbent for the treatment of rare earth elements. Through the use of elemental analysis as well as FTIR, SEM, XPS, and Brunauer-Emmett-Teller (BET) surface area measurement, the synthesized polymer was found to have a specific surface area of 111.4 m2·g−1. The adsorption performances of rare metal ions were investigated under different pH levels, contact times, initial concentrations of rare earth ions, and temperatures. The adsorption equilibrium for La3+, Ce3+, and Y3+ onto a polystyrene-poly(hydroxamic acid) copolymer is described by the Langmuir model, which confirms the applicability of monolayer coverage of rare earth ions onto a polystyrene-poly(hydroxamic acid) copolymer. The amount of adsorption capacities for La3+, Ce3+, and Y3+ reached 1.27, 1.53, and 1.83 mmol·g−1 within four hours, respectively. The adsorption process was controlled by liquid film diffusion, particle diffusion, and chemical reaction simultaneously. The thermodynamic parameters, including the change of Gibbs free energy (∆G), the change of enthalpy (∆H), and the change of entropy (∆S), were determined. The results indicate that the adsorption of resins for La3+, Ce3+ and Y3+ was spontaneous and endothermic. The polymer was also used as a recyclable adsorbent by the desorption experiment.

Recovery of Rare Metal Ions

2019 ◽  
pp. 73-83
Author(s):  
Kouichi Kuroda
Keyword(s):  
Metal Ions ◽  
Rare Metal

Magnetic Resonance Study of Detonation Nanodiamonds with Surface Chemically Modified by Transition Metal Ions

2009 ◽  
Vol 36 (2-4) ◽  
pp. 317-329 ◽  
Author(s):  
A. M. Panich ◽  
A. I. Shames ◽  
O. Medvedev ◽  
V. Yu. Osipov ◽  
A. E. Aleksenskiy ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Detonation Nanodiamonds ◽  
Magnetic Resonance Study ◽  
Chemically Modified

scholarly journals Synthesis of a Metal Ion Adsorbent from Banana Fibers and Its Adsorption Properties for Rare Metal Ions

2016 ◽  
Vol 27 (3) ◽  
pp. 57-62 ◽  
Author(s):  
Tetsuto KAJIYAMA ◽  
Shohei SAKAI ◽  
Jun INOUE ◽  
Toru YOSHINO ◽  
Satoshi OHMURO ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Rare Metal ◽  
Adsorption Properties ◽  
Banana Fibers

Cucumis melo Rind as Biosorbent to Remove Fe(II) and Mn(II) from Synthetic Groundwater Solution

2013 ◽  
Vol 795 ◽  
pp. 266-271 ◽  
Author(s):  
Norzila Othman ◽  
Syazwani Mohd Asharuddin
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Metal Concentration ◽  
Sorption Capacity ◽  
Cucumis Melo ◽  
Carboxyl Groups ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Synthetic Groundwater ◽  
Effective Sorbent

Cucumis melo rind was evaluated as a new biosorbent for the removal of Fe (II) and Mn (II) from synthetic groundwater solution. The maximum sorption capacity of Fe (II) and Mn (II) was found to be 4.98 mg/g and 1.37 mg/g respectively. Sorption was most efficient at pH 7 and 6.5 for Fe (II) and Mn (II) respectively. The biosorption of both metals increased as the quantity of biosorbent increased. The increase in initial metal concentration was associated with steep increase in biosorption at lower concentrations and progressively reaching towards plateau at higher metal concentration. FTIR demonstrated that hydroxyl and carboxyl groups were involved in the biosorption of the metal ions. The study points to the potential of new use of Cucumis melo rind as an effective sorbent for the removal of Fe (II) and Mn (II) from aqueous solution.

scholarly journals Extractive Separation of Trivalent Rare Earth Metal Ions with Phenylphosphoric Acid Type of Trident Molecule for Rare Metal Recovery

2018 ◽  
Vol 23 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Keisuke OHTO ◽  
Hiromasa MURASHIMA ◽  
Shintaro MORISADA ◽  
Hidetaka KAWAKITA ◽  
Marco WENZEL ◽  
...  
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Rare Metal ◽  
Metal Recovery ◽  
Acid Type ◽  
Extractive Separation ◽  
Trivalent Rare Earth

Selective removal of transition metal ions from aqueous solution by metal–organic frameworks

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 72107-72112 ◽  
Author(s):  
Yutian Zhang ◽  
Xudong Zhao ◽  
Hongliang Huang ◽  
Zhengjie Li ◽  
Dahuan Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Organic Frameworks ◽  
Transition Metal Ions ◽  
Selective Removal ◽  
Carboxyl Groups ◽  
Separation Selectivity ◽  
Metal Organic ◽  
High Separation

Carboxyl groups in adjacent ligands in UiO-66(Zr)–2COOH exhibit specific capture performance for Cu2+, resulting in high separation selectivity for Cu2+/Ni2+.

scholarly journals Preparation of a Modified PTFE Fibrous Photo-Fenton Catalyst and Its Optimization towards the Degradation of Organic Dye

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Zhizhong Ding ◽  
Yongchun Dong ◽  
Bing Li
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Metal Content ◽  
Dye Degradation ◽  
Fiber Surface ◽  
Transition Metal Ions ◽  
Rare Metal ◽  
Catalytic Performance ◽  
Factors Affecting ◽  
Grafting Degree

Polytetrafluoroethylene (PTFE) fiber was grafted with acrylic acid to impart the carboxyl groups onto the fiber surface, which were used to coordinate with both transition metal ions Fe(III) and Cu(II) and a rare metal ion Ce(III) to prepare the metal grafted PTFE fiber complexes as the novel heterogeneous Fenton catalysts for the degradation of the azo dye in water under visible irradiation. Some factors affecting the preparation process, such as nature and concentration of metal ions in the coordination solution, grafting degree of PTFE and reaction temperature were optimized with respect to the content and strength of metal fixation on the fiber and dye degradation efficiency. The results indicated that increasing metal ion concentrations in solution and grafting degree of PTFE fiber as well as higher coordination temperature led to a significant increase in metal content, especially Fe(III) and Cu(II) content of the complexes. Fe(III) ions fixed on the fiber showed the better catalytic performance than Cu(II) and Ce(III) ions fixed when three different complexes with similar metal content being employed, respectively. Moreover, Increasing Fe content or incorporation of Cu(II) ions could significantly improve the catalytic activity of the complexes.

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