THE PHOTOCHEMICAL EVOLUTION OF HYDROGEN FROM AQUEOUS SOLUTIONS OF FERROUS IONS. PART II. EFFECT OF CHANGING pH

1962 ◽  
Vol 66 (7) ◽  
pp. 1264-1271 ◽  
Author(s):  
Joshua Jortner ◽  
Gabriel Stein
Keyword(s):  
Aqueous Solutions ◽  
Ferrous Ions

Removal of ferrous ions from their aqueous solutions onto NiFe 2 O 4 –alginate composite beads

2015 ◽  
Vol 3 (3) ◽  
pp. 1486-1496 ◽  
Author(s):  
Al-Sayed A. Bakr ◽  
Yasser M. Moustafa ◽  
Eman A. Motawea ◽  
Mohamed M. Yehia ◽  
Mostafa M.H. Khalil
Keyword(s):  
Aqueous Solutions ◽  
Ferrous Ions ◽  
Composite Beads

Sorption of Ferric and Ferrous Ions on Silica

2006 ◽  
Vol 518 ◽  
pp. 67-72 ◽  
Author(s):  
S.K. Milonjić ◽  
Smiljka D. Čupić ◽  
Lj.S. Čerović
Keyword(s):  
Aqueous Solutions ◽  
Sorption Isotherms ◽  
Type A ◽  
Colloidal Dispersion ◽  
Silica Sol ◽  
Sorption Mechanism ◽  
Ferrous Ions ◽  
Solution Ph ◽  
Silica Powder ◽  
High Affinity

The sorption of ferric and ferrous ions from aqueous solutions on the silica powder, obtained from colloidal dispersion of silica (silica sol), was studied as a function of their concentrations and solution pH. The amount of sorbed ferric and ferrous ions increases with increasing final pH of the solution. The sorption isotherms are of high-affinity type. A sorption mechanism of ferric and ferrous ions from aqueous solutions on silica is proposed.

Synthesis of Nanoporous Materials and their Functionalization for Environmental Applications

2014 ◽  
Vol 783-786 ◽  
pp. 2005-2010
Author(s):  
Adriana Medina Ramírez ◽  
Prócoro Gamero Melo ◽  
José Manuel Almanza Robles
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Textural Properties ◽  
Raw Material ◽  
Synthesis Methods ◽  
Metallic Ions ◽  
Ferrous Ions ◽  
Chemical Surface ◽  
Aluminum Ions ◽  
Zeolite Type

In this work, W, P and faujasite zeolites were synthesized using fly ash as raw material, a waste material derived of coal fired plants in Mexico. Two different synthesis methods were used. Zeolites were submitted a functionalization treatment exchanging their metallic ions by ammonium, aluminum and ferrous ions. Chemical, structural and textural properties of functionalized zeolites were evaluated. As (V) and As (III) adsorption capacity of modified zeolites were assessed. Changes on their structural properties were no significant. While the textural properties such as pore volume, specific surface area and pore size distribution were dependent of nature of ion exchanged, and the accessibility of extra-framework sites of the zeolites. Functionalization with di and trivalent ions allow changing the zeolitic surface charge. This modification led to increase their ability to adsorb anionic species from aqueous solutions. The results shown that, the adsorption capacity was dependent of zeolite type and their chemical surface nature. W zeolite modified with aluminum ions achieved the highest arsenic (V) adsorption capacity. While ferrous functionalization on W zeolite shown a high affinity to remove As (III) species from aqueous solutions.

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