Template-etched sodium alginate hydrogel as the sublayer to improve the FO performance with double barriers for high metal ion rejection

2020 ◽  
pp. 127425
Author(s):  
Wei Huang ◽  
Lihua Zhao ◽  
Jiayan Zhang ◽  
Hao Wen ◽  
Ziyi Zhu ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Metal Ion ◽  
Alginate Hydrogel ◽  
Ion Rejection ◽  
High Metal

scholarly journals Uncommon biphasic behaviour induced by very high metal ion concentrations in HCl/H2O/[P44414]Cl and HCl/H2O/PEG-600 systems

2020 ◽  
Vol 22 (40) ◽  
pp. 23226-23236
Author(s):  
Eris Sinoimeri ◽  
Victor Maia Fernandes ◽  
Jérôme Cognard ◽  
Jorge Fernando Brandão Pereira ◽  
Lenka Svecova ◽  
...  
Keyword(s):  
Metal Ion ◽  
Ion Concentrations ◽  
System P ◽  
High Metal ◽  
Very High ◽  
Peg 600

Large amounts of Fe(iii) or Fe(ii) strongly modify the biphasic behavior of the system P44414Cl/HCl/H2O while large amounts of Fe(iii) induce a biphasic regime for the mixture PEG-600/HCl/H2O.

Fe3+-Citric acid/ Sodium alginate hydrogel: A photo-responsive platform for rapid water purification

2021 ◽  
pp. 118269
Author(s):  
Yueshan Li ◽  
Zhisen Wang ◽  
Xiaoyu Wang ◽  
Bin Yan ◽  
Yinjie Peng ◽  
...  
Keyword(s):  
Citric Acid ◽  
Sodium Alginate ◽  
Water Purification ◽  
Alginate Hydrogel

scholarly journals Kinetics and mechanism of sol-gel transformation between some trivalent- and tetravalent-metal ions and Sodium alginate Anionic polyelectrolyte with formation of coordination Biopolymeric structure polymembranes Hydrogels of Capillary Structures Ex

2007 ◽  
Vol 3 (1) ◽  
pp. 133-142 ◽  
Author(s):  
Ishaq Abdullah Zaafarany
Keyword(s):  
Sodium Alginate ◽  
Metal Ion ◽  
Sol Gel ◽  
Coordination Geometry ◽  
Large Excess ◽  
First Order ◽  
Pseudo First Order ◽  
The Stability ◽  
Kinetics Of ◽  
Overall Kinetics

Abstract          The kinetics of sol-gel transformation between A13+, La 3+ and Th4+ metal ion electrolytes and sodium alginate sol have been studied complexometrically at various  temperatures. In the presence of a large excess of sodium alginate sol concentration over that of metal ion electrolyte, the pseudo first–order plots of exchange showed sigmoidal curves with two distinct stages. The initial part was relatively fast and curved significantly at early times, followed by a slow decrease in the rates of exchange over longer time periods. The rate constants of gelation showed second-order overall kinetics which was first order in the concentration of both reactants. The thermodynamic parameters have been evaluated and tentative gelation mechanisms consistent with the kinetic results of gelation are suggested. The stability of these ionotropic metal-alginate complexes has been discussed in terms of the coordination geometry and strength of chelated bonds.

Fabrication of Photo-crosslinked Chitosan- Gelatin Scaffold in Sodium Alginate Hydrogel for Chondrocyte Culture

2014 ◽  
Vol 24 (1) ◽  
pp. 633-641 ◽  
Author(s):  
Peng Zhao ◽  
Cuijun Deng ◽  
Hongzhen Xu ◽  
Xing Tang ◽  
Hailong He ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Alginate Hydrogel ◽  
Chondrocyte Culture ◽  
Crosslinked Chitosan

Fabrication of an efficient ZIF-8 alginate composite hydrogel material and its application for enhanced copper (II) adsorption from aqueous solutions

2021 ◽  
Author(s):  
Xiao Zhang ◽  
Zhiyue Li ◽  
Taoyi Zhang ◽  
Jing Chen ◽  
Wenxi Ji ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Composite Hydrogel ◽  
Alginate Hydrogel ◽  
Zeolitic Imidazolate Framework ◽  
Composite Bead ◽  
Hydrogel Beads

A novel zeolitic imidazolate framework-8 (ZIF-8) alginate composite hydrogel material (PVA/SA@ZIF-8) is alginate composite bead which was fabricated by grafting ZIF-8 on the surface of the sodium alginate hydrogel beads...

scholarly journals Identification of Molecular Fluorophore as a Component of Carbon Dots able to Induce Gelation in a Fluorescent Multivalent-Metal-Ion-Free Alginate Hydrogel

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Peter Kasak ◽  
Martin Danko ◽  
Sifani Zavahir ◽  
Miroslav Mrlik ◽  
Yuan Xiong ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carbon Dots ◽  
Metal Ion ◽  
Divalent Metal ◽  
Simple Approach ◽  
Sodium Ions ◽  
Divalent Metal Ions ◽  
Alginate Hydrogel ◽  
Carboxylic Acid Groups ◽  
Multivalent Metal

Abstract We introduce a simple approach to fabricate fluorescent multivalent metal ion-free alginate hydrogels, which can be produced using carbon dots accessible from natural sources (citric acid and L-cysteine). Molecular fluorophore 5-oxo-2,3-dihydro-5H-[1,3]-thiazolo[3,2-a] pyridine-3,7-dicarboxylic acid (TPDCA), which is formed during the synthesis of carbon dots, is identified as a key segment for the crosslinking of hydrogels. The crosslinking happens through dynamic complexation of carboxylic acid groups of TPDCA and alginate cages along with sodium ions. The TPDCA derived hydrogels are investigated regarding to their thermal, rheological and optical properties, and found to exhibit characteristic fluorescence of this aggregated molecular fluorophore. Moreover, gradient hydrogels with tunable mechanical and optical properties and controlled release are obtained upon immersion of the hydrogel reactors in solutions of divalent metal ions (Ca2+, Cu2+, and Ni2+) with a higher affinity to alginate.

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