Removal of uranium(VI) from aqueous solutions by magnetic Mg–Al layered double hydroxide intercalated with citrate: Kinetic and thermodynamic investigation

2012 ◽  
Vol 414 ◽  
pp. 220-227 ◽  
Author(s):  
Xiaofei Zhang ◽  
Lanyang Ji ◽  
Jun Wang ◽  
Rumin Li ◽  
Qi Liu ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Layered Double Hydroxide ◽  
Thermodynamic Investigation ◽  
Double Hydroxide

Removal of Methyl Orange from Aqueous Solutions by Using Zn-Al Layered Double Hydroxide as Photocatalyst

2015 ◽  
Vol 1 (2) ◽  
pp. 36-41
Author(s):  
Laura Cocheci ◽  
◽  
Ancuta-Corina Marcu ◽  
Paul Barvinschi ◽  
Aniela Pop
Keyword(s):  
Methyl Orange ◽  
Aqueous Solutions ◽  
Layered Double Hydroxide ◽  
Double Hydroxide

Highly efficient carbonaceous nanofiber/layered double hydroxide nanocomposites for removal of U(VI) from aqueous solutions

2019 ◽  
Vol 107 (4) ◽  
pp. 299-309
Author(s):  
Shuqi Yu ◽  
Xiangxue Wang ◽  
Shunyan Ning ◽  
Zhongshan Chen ◽  
Xiangke Wang
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Layered Double Hydroxide ◽  
Photoelectron Spectroscopy ◽  
Environmental Remediation ◽  
Three Dimensional ◽  
Order Kinetic ◽  
Surface Bonding ◽  
Double Hydroxide ◽  
Shed Light

Abstract The three-dimensional (3D) carbonaceous nanofiber and Ni-Al layered double hydroxide (CNF/LDH) nanocomposite was successfully prepared by a facile one-step hydrothermal methodology. Characterization of scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), XRD, and Fourier transformed infrared spectroscopy (FTIR) provided a demonstration that the modified CNF/LDH nanocomposite possessed abundant functional groups, for instance, metal-oxygen surface bonding sites (Ni–O as well as Al–O) and free-metal surface bonding sites (C–O, C–O–C, as well as O–C=O). The elimination of representative radionuclide (i.e. U(VI)) on the CNF/LDH nanocomposite from aqueous solutions was explored as a key function of pH, ionic strength, contact time, reaction temperature as well as radionuclide preliminary concentrations with the use of the batch methodology. As revealed by the findings, the sorption of radionuclides on CNF/LDH nanocomposite adhered to the pseudo-second-order kinetic model as well as Langmuir model. The maximum elimination capacity of U(VI) amounted to be 0.7 mmol/g. The independent of ionic strength shed light on the fact that inner-sphere surface complexation mainly overpowered radionuclide uptake by the CNF/LDH nanocomposite, which was further verified through the combination of FTIR and XPS spectral analyses. The abovementioned analyses shed light on the fact that the CNF/LDH nanocomposite can be regarded as a latent material to preconcentration radionuclides for environmental remediation.

Highly efficient and selective adsorption of In3+ on pristine Zn/Al layered double hydroxide (Zn/Al-LDH) from aqueous solutions

2016 ◽  
Vol 233 ◽  
pp. 133-142 ◽  
Author(s):  
Mary Jenisha Barnabas ◽  
Surendran Parambadath ◽  
Aneesh Mathew ◽  
Sung Soo Park ◽  
Ajayan Vinu ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Layered Double Hydroxide ◽  
Selective Adsorption ◽  
Highly Efficient ◽  
Double Hydroxide
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