Fabrication of xanthate-modified chitosan/poly(N-isopropylacrylamide) composite hydrogel for the selective adsorption of Cu(II), Pb(II) and Ni(II) metal ions

2018 ◽  
Vol 139 ◽  
pp. 197-210 ◽  
Author(s):  
Shuping Wu ◽  
Fan Wang ◽  
Haikuan Yuan ◽  
Lijuan Zhang ◽  
Shimin Mao ◽  
...  
Keyword(s):  
Metal Ions ◽  
Selective Adsorption ◽  
Composite Hydrogel ◽  
Modified Chitosan

A comparative study on selective adsorption of metal ions using aminated adsorbents

2013 ◽  
Vol 395 ◽  
pp. 230-240 ◽  
Author(s):  
Len Foong Koong ◽  
Koon Fung Lam ◽  
John Barford ◽  
Gordon McKay
Keyword(s):  
Comparative Study ◽  
Metal Ions ◽  
Selective Adsorption ◽  
Adsorption Of Metal Ions

scholarly journals Effects of Electronegativity and Hydration Energy on the Selective Adsorption of Heavy Metal Ions by Synthetic NaX Zeolite

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4066
Author(s):  
Xianyuan Fan ◽  
Hong Liu ◽  
Emmanuella Anang ◽  
Dajun Ren
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Heavy Metal Ions ◽  
Binary Systems ◽  
Adsorption Mechanism ◽  
Selective Adsorption ◽  
Hydration Energy ◽  
Nax Zeolite ◽  
High Electronegativity

The adsorption capacity of synthetic NaX zeolite for Pb2+, Cd2+, Cu2+ and Zn2+ in single and multi-component systems were investigated. The effects of electronegativity and hydration energy on the selective adsorption, as well as potential selective adsorption mechanism of the NaX zeolite for Pb2+, Cd2+, Cu2+ and Zn2+ were also discussed. The maximum adsorption capacity order of the heavy metals in the single system was Pb2+ > Cd2+ > Cu2+ > Zn2+, and this could be related to their hydration energy and electronegativity. The values of the separation factors (α) and affinity constant (KEL) in different binary systems indicated that Pb2+ was preferentially adsorbed, and Zn2+ presented the lowest affinity for NaX zeolite. The selective adsorption capacities of the metals were in the order, Pb2+ > Cd2+ ≈ Cu2+ > Zn2+. The trend for the selective adsorption of NaX zeolite in ternary and quaternary systems was consistent with that in the binary systems. Pb2+ and Cu2+ reduced the stability of the Si-O-Al bonds and the double six-membered rings in the NaX framework, due to the high electronegativity of Pb2+ and Cu2+ than that of Al3+. The selective adsorption mechanism of NaX zeolite for the high electronegative metal ions could mainly result from the negatively charged O in the Si-O-Al structure of the NaX zeolite, hence heavy metal ions with high electronegativity display a strong affinity for the electron cloud of the oxygen atoms in the Si-O-Al. This study could evaluate the application and efficiency of zeolite in separating and recovering certain metal ions from industrial wastewater.

A facile coordinate complexing of Na(I) to fabricate SPB-ACE@MS-4A for selective adsorption to monovalent alkali metal ions

Desalination ◽  
2021 ◽  
Vol 520 ◽  
pp. 115337
Author(s):  
Weifang Zhang ◽  
Shan Wang ◽  
Xulei Cao ◽  
Niuniu Gu ◽  
Yan Qin ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Selective Adsorption ◽  
Alkali Metal Ions

Selective adsorption of uranyl and potentially toxic metal ions at the core-shell MFe2O4-TiO2 (M=Mn, Fe, Zn, Co, or Ni) nanoparticles

2019 ◽  
Vol 365 ◽  
pp. 835-845 ◽  
Author(s):  
Liang Bian ◽  
Jianan Nie ◽  
Xiaoqiang Jiang ◽  
Mianxin Song ◽  
Faqin Dong ◽  
...  
Keyword(s):  
Metal Ions ◽  
Selective Adsorption ◽  
Toxic Metal ◽  
Core Shell ◽  
Ni Nanoparticles ◽  
Toxic Metal Ions ◽  
The Core

Simultaneous removal of metal ions and methyl orange by combined selective adsorption and photocatalysis

2010 ◽  
Vol 30 (4) ◽  
pp. 567-575 ◽  
Author(s):  
Xiaolei Zhao ◽  
Qiang Li ◽  
Xin Zhang ◽  
Haijia Su ◽  
Kai Lan ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Metal Ions ◽  
Selective Adsorption ◽  
Simultaneous Removal ◽  
Removal Of Metal ◽  
Removal Of Metal Ions
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