Synthesis of several novel coordination complexes: ion exchange, magnetic and photocatalytic studies

2017 ◽  
Vol 41 (3) ◽  
pp. 1046-1056 ◽  
Author(s):  
Huijun Li ◽  
Yuan Wang ◽  
Yaling He ◽  
Zhouqing Xu ◽  
Xiaolei Zhao ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Coordination Complexes

Eight different novel polymers by the reactions of H2L and metal ions (Zn2+, Cu2+, Co2+) in the presence or absence of auxiliary ligands were constructed. The Zn2+ in complexes 1–3 could be partially exchanged with Cu2+ ions.

The transition state for exchange of protons and metal ions in a carboxylate ion-exchange resin

1977 ◽  
Vol 99 (18) ◽  
pp. 5916-5919 ◽  
Author(s):  
Julio F. Mata-Segreda ◽  
Siegfried Lindenbaum ◽  
Richard L. Schowen
Keyword(s):  
Ion Exchange ◽  
Transition State ◽  
Metal Ions ◽  
Exchange Resin ◽  
Ion Exchange Resin

Separation of Alkali-Metal Ions from Each Other and from Other Metal Ions on Ion-Exchange Papers

1967 ◽  
Vol 2 (5) ◽  
pp. 691-695 ◽  
Author(s):  
Joseph Sherma ◽  
David A. Goldstein ◽  
James P. Gutai
Keyword(s):  
Ion Exchange ◽  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions

scholarly journals Modified ion exchange jackfruit seeds resin for removal of selected trace heavy metal ions from aqueous solution

2021 ◽  
Vol 2 (2) ◽  
pp. 84-92
Author(s):  
S N Ndung’u ◽  
E W Nthiga ◽  
R N Wanjau
Keyword(s):  
Heavy Metal ◽  
Ion Exchange ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Active Sites ◽  
Ion Exchange Resin ◽  
Standard Entropy ◽  
Environmentally Sustainable ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Water is essential for every life processes. However, its quality is deteriorating every day due to the recent industrial advancements. Anthropogenic processes such as industrialization, mining and agricultural activities have led to alarming discharge of heavy metal ions to the aquatic bodies. This possess a greater threat to human, animal and the entire ecosystem wellbeing. Accumulation of heavy metal ions in drinking water beyond permissible limits is detrimental to human health. Therefore, their removal is paramount. Conventional remediation techniques have been employed but have remained expensive and not universally appropriate. This has therefore spurred research interests in the use of adsorption techniques from locally available materials as an environmentally sustainable alternative. Jackfruit seeds are discarded as wastes of a Jackfruit and can be utilized as an ion exchange resin in heavy metal ions removal from wastewater. The present study involved application of previously prepared raw and modified Jackfruit seed resins to study thermodynamics of copper (II), lead (II) and cadmium (II) ions adsorption from synthetic water. FTIR results showed presence of functional groups in raw and modified resins as important sites for studying thermodynamics of adsorption of copper (II), lead (II) and cadmium (II) ions. Thermodynamic data showed that standard Gibb’s free energy () values for all metals were negative indicating that adsorption process was feasible and favourable. Standard enthalpy change (), standard entropy () and activation energy () were positive (> 40 kJ mol-1) and in the order lead (II) > copper (II) > cadmium (II). This confirmed adsorption of copper (II), lead (II) and cadmium (II) ions onto both raw and modified resins was predominated by chemical interactions between the metal ions and the resin active sites. This was confirmed by very low values of sticking probability (S*). The findings indicated that ion exchange Jackfruit seeds resin is promising for heavy metal ions removal from wastewater in an optimized temperature controlled system.

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