scholarly journals Simultaneously Remove and Visually Detect Ce4+ Based On Nanocomposite of UiO-66-NH2/CPA-MA

2021 ◽  
Author(s):  
Xiaoqiu Tang ◽  
Pinghua Chen ◽  
Tao Wang ◽  
Jiezeng Ceng ◽  
Hualin Jiang
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
High Capacity ◽  
High Adsorption ◽  
Kinetics Of Adsorption ◽  
Effective Strategies ◽  
Adsorption Performance ◽  
Kinetics Of

Abstract Effective strategies to deal with rare earth pollution are urgently needed due to the overexploitation of rare earths resource. In this study, a novel nanocomposite of UiO-66-NH2/CPA-MA denoted as UA was successfully synthesized, which can simultaneously remove and detect Ce4+ in water. The hybrid consists of UiO-66-NH2 and CPA-MA. Based on the high adsorption performance of UiO-66-NH2, it can remove Ce4+ with high capacity by adsorption. Moreover, it can change its color from olive drab to light cyan depending on the adsorbed Ce4+ concentration, and the chroma is linearly related to the Ce4+ concentration. So UA can be used to qualitatively and quantitatively detect Ce4+ by its color changing. The kinetics of adsorption course were investigated in details. The anti-inference ability of the nanocomposite in co-existing systems were carefully evaluated. The results indicate that UiO-66-NH2/CPA-MA is highly potential to deal with Ce4+ pollutions due to its bi-functionality.

scholarly journals Simultaneously Remove and Visually Detect Ce4+ Based on Nanocomposite of UiO-66-NH2/CPA-MA

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Xiaoqiu Tang ◽  
Guanghui Wu ◽  
Tao Wang ◽  
Pinghua Chen ◽  
Jiezeng Chen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
High Capacity ◽  
High Adsorption ◽  
Kinetics Of Adsorption ◽  
Effective Strategies ◽  
Adsorption Performance ◽  
Kinetics Of

Effective strategies to deal with rare earth pollution are urgently needed due to the overexploitation of rare earths resource. In this study, a novel nanocomposite of UiO-66-NH2/CPA-MA denoted as UA was successfully synthesized, which can simultaneously remove and detect Ce4+ in water. The hybrid consists of UiO-66-NH2 and CPA-MA. Based on the high adsorption performance of UiO-66-NH2, it can remove Ce4+ with high capacity by adsorption. Moreover, it can change its color from olive drab to light cyan depending on the adsorbed Ce4+ concentration, and the chroma is linearly related to the Ce4+ concentration. So, UA can be used to qualitatively and quantitatively detect Ce4+ by its color changing. The kinetics of adsorption course was investigated in details. The anti-inference ability of the nanocomposite in coexisting systems was carefully evaluated. The results indicate that UiO-66-NH2/CPA-MA is highly potential to deal with Ce4+ pollutions due to its bifunctionality.

scholarly journals Adsorption performance of functionalized chitosan–silica hybrid materials toward rare earths

2014 ◽  
Vol 2 (45) ◽  
pp. 19415-19426 ◽  
Author(s):  
Joris Roosen ◽  
Jeroen Spooren ◽  
Koen Binnemans
Keyword(s):  
Rare Earth ◽  
Hybrid Materials ◽  
Rare Earths ◽  
Rare Earth Ions ◽  
Adsorption Performance ◽  
Separation Of Mixtures ◽  
Silica Hybrid

Functionalized chitosan–silica hybrid materials were synthesized, characterized and used for adsorption of rare-earth ions. These adsorbents can be used for the separation of mixtures of rare-earths.

Study on the diffusion kinetics of adsorption of heavy rare earth with Cyanex272-P507 impregnated resin

2010 ◽  
Vol 28 ◽  
pp. 120-124 ◽  
Author(s):  
Chunfa LIAO ◽  
Huaping Nie ◽  
Yunfen JIAO ◽  
Yong LIANG ◽  
Shaohua YANG
Keyword(s):  
Rare Earth ◽  
Diffusion Kinetics ◽  
Heavy Rare Earth ◽  
Kinetics Of Adsorption ◽  
Impregnated Resin ◽  
Kinetics Of

High adsorption activated calcium silicate enabling high-capacity adsorption for sulfur dioxide

2020 ◽  
Vol 44 (27) ◽  
pp. 11879-11886
Author(s):  
Feng Wang ◽  
Yongfeng Zhang ◽  
Zhihui Mao
Keyword(s):  
Fly Ash ◽  
Sulfur Dioxide ◽  
Calcium Silicate ◽  
Porous Silica ◽  
High Capacity ◽  
High Porosity ◽  
High Adsorption ◽  
Adsorption Performance ◽  
Silicon Sources

Fly ash, with its abundant silicon sources and high porosity, is an excellent precursor of porous silica-based sorbents, which are the key to obtaining high SO2 adsorption performance.

Influence of Rare Earth Metals on Carburizing Kinetics of 21NiCrMo2 Steel

2015 ◽  
Vol 1114 ◽  
pp. 206-213 ◽  
Author(s):  
Daniela Dragomir ◽  
Mihai Cojocaru ◽  
Leontin Druga ◽  
Zoltán Kolozsváry ◽  
Andrei Berbecaru
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Rare Earth Metals ◽  
Layer Growth ◽  
Technical Literature ◽  
Metallic Material ◽  
Thermochemical Processing ◽  
Kinetics Of

The influence of rare-earth metals adsorbed in the surface of the metallic material subject to thermochemical processing as well as of those pre-added in the material matrix on the kinetics of layers growth is presented in the technical literature. It is generally concluded that the presence of rare earths is accelerating the kinetics of layer growth.

scholarly journals The kinetics of adsorption binding of Ba2+ ions by trimethylsilylated silica

2018 ◽  
Vol 19 (1) ◽  
pp. 66-73 ◽  
Author(s):  
I. F. Myronyuk ◽  
H. V. Vasylyeva ◽  
V. I. Mandzyuk ◽  
N. A. Bezruka ◽  
T. V. Dmytrotsa
Keyword(s):  
Electrolyte Solution ◽  
Fumed Silica ◽  
Silica Surface ◽  
High Adsorption ◽  
Modified Silica ◽  
Adsorption Activity ◽  
Kinetics Of Adsorption ◽  
Pseudo Second Order ◽  
Unmodified Silica ◽  
Kinetics Of

It was established that incomplete substitution of free silanols of fumed silica surface on (CH3)3Si-groups leads to an increase in the ability of modified SiO2 to adsorb Ba2+ cations from an electrolyte solution. Silica with 48.3% of trimethylsilyl (TMS) groups adsorbs 1.8 mmol·g-1 of Ba2+ cations from 0.01 M BaCl2 solution, that in 3 times more than the adsorption of these cations by unmodified silica. It was found that the adsorption of cations by basic and modified silica is well described by the pseudo-second order Lagergren equation. The high adsorption activity of silica with chemisorbed TMS-groups is due to the formation of local regions with relatively large values of negative and positive electrostatic potentials in the vicinity of grafted TMS-groups.

Abnormal Platelet Serotonin Uptake and Binding Sites in Myeloproliferative Disorders

1984 ◽  
Vol 51 (03) ◽  
pp. 349-353 ◽  
Author(s):  
C Caranobe ◽  
P Sié ◽  
F Fernandez ◽  
J Pris ◽  
S Moatti ◽  
...  
Keyword(s):  
Binding Sites ◽  
High Capacity ◽  
Specific Inhibitor ◽  
Myeloproliferative Disorders ◽  
Normal Subjects ◽  
Binding Data ◽  
Full Explanation ◽  
Number Of Binding Sites ◽  
5 Ht Uptake ◽  
Kinetics Of

SummaryA simultaneous investigation of the kinetics of serotonin (5 HT) uptake and of binding sites was carried out in the platelets of normal subjects and of 10 patients affected with various types of myeloproliferative disorders (MD). The 5 HT uptake was analysed according to the Lineweaver-Burk and the Eadie-Hofstee methods. With the two methods, the patient’s platelets exhibited a dramatic reduction of the Vi max and of the Km; in some patients the Eadie-Hofstee analysis revealed that a passive diffusion phenomenon is superimposed on the active 5 HT uptake at least for the higher concentration used. The binding data were analysed with the Scatchard method. Two classes of binding sites (high affinity - low capacity, low affinity - high capacity) were found in normal subjects and patients. Pharmacological studies with imipramine, a specific inhibitor of 5 HT uptake, suggested that both the sites are involved in 5 HT uptake. The number of both binding sites was significantly decreased in patient’s platelets while the affinity constants of these binding sites were not significantly reduced in comparison with those of the control subjects. No correlations were found between Vi max, Km and the number of binding sites. These results suggest that a reduction in the number of platelet membrane acceptors for 5 HT commonly occurs in myeloproliferative disorders but does not provide a full explanation of the uptake defect.

A glance on rare earth oxides: importance, reserves, demand, applications, critical uncertainties, global economy, and zeta potential characterization

2020 ◽  
Vol 05 ◽  
Author(s):  
Silas Santos ◽  
Orlando Rodrigues ◽  
Letícia Campos
Keyword(s):  
Rare Earth ◽  
Zeta Potential ◽  
Sample Preparation ◽  
Rare Earths ◽  
Smart Materials ◽  
Global Economy ◽  
Materials Science ◽  
Functional Materials ◽  
Rare Earth Oxides ◽  
Interparticle Forces

Background: Innovation mission in materials science requires new approaches to form functional materials, wherein the concept of its formation begins in nano/micro scale. Rare earth oxides with general form (RE2O3; RE from La to Lu, including Sc and Y) exhibit particular proprieties, being used in a vast field of applications with high technological content since agriculture to astronomy. Despite of their applicability, there is a lack of studies on surface chemistry of rare earth oxides. Zeta potential determination provides key parameters to form smart materials by controlling interparticle forces, as well as their evolution during processing. This paper reports a study on zeta potential with emphasis for rare earth oxide nanoparticles. A brief overview on rare earths, as well as zeta potential, including sample preparation, measurement parameters, and the most common mistakes during this evaluation are reported. Methods: A brief overview on rare earths, including zeta potential, and interparticle forces are presented. A practical study on zeta potential of rare earth oxides - RE2O3 (RE as Y, Dy, Tm, Eu, and Ce) in aqueous media is reported. Moreover, sample preparation, measurement parameters, and common mistakes during this evaluation are discussed. Results: Potential zeta values depend on particle characteristics such as size, shape, density, and surface area. Besides, preparation of samples which involves electrolyte concentration and time for homogenization of suspensions are extremely valuable to get suitable results. Conclusion: Zeta potential evaluation provides key parameters to produce smart materials seeing that interparticle forces can be controlled. Even though zeta potential characterization is mature, investigations on rare earth oxides are very scarce. Therefore, this innovative paper is a valuable contribution on this field.

Sign in / Sign up

Export Citation Format

Share Document