Functionalized Porous Aromatic Framework for Efficient Uranium Adsorption from Aqueous Solutions

2017 ◽  
Vol 9 (14) ◽  
pp. 12511-12517 ◽  
Author(s):  
Baiyan Li ◽  
Qi Sun ◽  
Yiming Zhang ◽  
Carter W. Abney ◽  
Briana Aguila ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Uranium Adsorption ◽  
Porous Aromatic Framework

New insights into the uranium adsorption behavior of mesoporous SBA-15 silicas decorated with alkylphosphine oxide ligands

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1210-1217 ◽  
Author(s):  
Wen Zhang ◽  
Gang Ye ◽  
Jing Chen
Keyword(s):  
Aqueous Solutions ◽  
Addition Reaction ◽  
Mesoporous Silicas ◽  
Adsorption Behavior ◽  
Uranium Adsorption

Alkylphosphine oxide functionalized mesoporous silicas were prepared by co-condensation and further addition reaction with secondary n-propylphosphine oxide and are promising candidates for the preconcentration and adsorption of uranium from acidic aqueous solutions.

Quaternary Phosphonium-Grafted Porous Aromatic Framework for Preferential Uranium Adsorption in Alkaline Solution

2019 ◽  
Vol 58 (39) ◽  
pp. 18329-18335 ◽  
Author(s):  
Yinglin Shen ◽  
Nini Chu ◽  
Suliang Yang ◽  
Xiaomin Li ◽  
Hong Cao ◽  
...  
Keyword(s):  
Alkaline Solution ◽  
Uranium Adsorption ◽  
Porous Aromatic Framework

Hollow cobalt sulfide for highly efficient uranium adsorption from aqueous solutions

2019 ◽  
Vol 6 (11) ◽  
pp. 3230-3236 ◽  
Author(s):  
Weixin Dou ◽  
Weiting Yang ◽  
Xiaojun Zhao ◽  
Qinhe Pan
Keyword(s):  
Aqueous Solutions ◽  
Cobalt Sulfide ◽  
Uranium Adsorption ◽  
Adsorption Performance ◽  
Highly Efficient

The preparation of hollow Co3S4 nanostructures by ZIF-67 guarantees high uranium adsorption performance in aqueous solutions.

scholarly journals Pyrolytic temperature evaluation of macauba biochar for uranium adsorption from aqueous solutions

2019 ◽  
Vol 122 ◽  
pp. 381-390 ◽  
Author(s):  
S.N. Guilhen ◽  
O. Mašek ◽  
N. Ortiz ◽  
J.C. Izidoro ◽  
D.A. Fungaro
Keyword(s):  
Aqueous Solutions ◽  
Uranium Adsorption ◽  
Pyrolytic Temperature

Influence of initial concentrations and pH conditions on uranium adsorption in clays

2020 ◽  
Author(s):  
Subeen Kim ◽  
Minjune Yang
Keyword(s):  
Aqueous Solutions ◽  
Correlation Coefficient ◽  
Isotherm Model ◽  
Batch Adsorption ◽  
Adsorption Efficiency ◽  
Experimental Conditions ◽  
Uranium Adsorption ◽  
Effect Of Ph ◽  
Linear Isotherm ◽  
Ph Conditions

<p>Batch adsorption experiments were performed to investigate influences of experimental conditions such as initial uranium concentrations (0, 1 x 10<sup>-3</sup>, 1 x 10<sup>-2</sup>, 0.1, 0.5, 1 mg/L) and pHs of solution (4, 7 and 9.5) on uranium adsorption in three types of clay (kaolinite, montmorillonite, and bentonite). For all experiments, the adsorption of uranium could be described by the linear isotherm model at solution concentrations less than 1 mg/L, showing high values of correlation coefficient (R2 > 0.98). The adsorption efficiencies of montmorillonite and kaolinite for all pHs are more than 91% and 87%, respectively. The effect of pH on the adsorption of uranium was not found in kaolinite and montmorillonite for all initial concentrations. However, the adsorption efficiency of bentonite was lower than other clay types (< 75%). Solutions with low initial concentrations (< 1 x 10<sup>-2</sup> mg/L) achieved high efficiencies for adsorption of uranium (> 99%) at all pHs, while low efficiencies were observed in solutions with high initial concentrations (> 0.1 mg/L) at pH 4 (47%), pH 7 (59%) and pH 9.5 (43%). It is concluded that montmorillonite and kaolinite can be used as an effective adsorbent for removing uranium from aqueous solutions.</p>

Ultrathin frozen sections of yeast without aldehyde prefixation

1978 ◽  
Vol 36 (2) ◽  
pp. 58-59
Author(s):  
K. J. Böhm ◽  
a. E. Unger
Keyword(s):  
Aqueous Solutions ◽  
Biological Material ◽  
Yeast Cells ◽  
Frozen Sections ◽  
Good Preservation ◽  
Ultrathin Frozen Sections

During the last years it was shown that also by means of cryo-ultra-microtomy a good preservation of substructural details of biological material was possible. However the specimen generally was prefixed in these cases with aldehydes.Preparing ultrathin frozen sections of chemically non-prefixed material commonly was linked up to considerable technical and manual expense and the results were not always satisfying. Furthermore, it seems to be impossible to carry out cytochemical investigations by means of treating sections of unfixed biological material with aqueous solutions.We therefore tried to overcome these difficulties by preparing yeast cells (S. cerevisiae) in the following manner:

Imaging polymers, proteins and dna in aqueous solutions with the atomic force microscope

1989 ◽  
Vol 47 ◽  
pp. 32-33
Author(s):  
S.A.C. Gould ◽  
B. Drake ◽  
C.B. Prater ◽  
A.L. Weisenhorn ◽  
S.M. Lindsay ◽  
...  
Keyword(s):  
Amino Acids ◽  
Dna Sequencing ◽  
Aqueous Solutions ◽  
Atomic Force Microscope ◽  
Piezoelectric Crystal ◽  
Atomic Force ◽  
Structure Of Molecules ◽  
Optical Lever

The atomic force microscope (AFM) is an instrument that can be used to image many samples of interest in biology and medicine. Images of polymerized amino acids, polyalanine and polyphenylalanine demonstrate the potential of the AFM for revealing the structure of molecules. Images of the protein fibrinogen which agree with TEM images demonstrate that the AFM can provide topographical data on larger molecules. Finally, images of DNA suggest the AFM may soon provide an easier and faster technique for DNA sequencing.The AFM consists of a microfabricated SiO2 triangular shaped cantilever with a diamond tip affixed at the elbow to act as a probe. The sample is mounted on a electronically driven piezoelectric crystal. It is then placed in contact with the tip and scanned. The topography of the surface causes minute deflections in the 100 μm long cantilever which are detected using an optical lever.

Sign in / Sign up

Export Citation Format

Share Document