Stabilities of the 2-mercaptoethylamine complexes of trivalent metal ions and divalent metal ions in aqueous solution

1995 ◽  
Vol 231 (1-2) ◽  
pp. 159-165 ◽  
Author(s):  
Yuejin Li ◽  
Arthur E. Martell
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Trivalent Metal ◽  
Trivalent Metal Ions

scholarly journals Removal of trivalent metal ions from aqueous solution via cross-flow ultrafiltration system using zeolite membranes

2016 ◽  
Vol 7 (1) ◽  
pp. 66-76 ◽  
Author(s):  
Ashim Kumar Basumatary ◽  
R. Vinoth Kumar ◽  
Kannan Pakshirajan ◽  
G. Pugazhenthi
Keyword(s):  
Aqueous Solution ◽  
Contact Angle ◽  
Metal Ions ◽  
Cross Flow ◽  
Zeolite Membrane ◽  
Trivalent Metal ◽  
Zeolite Membranes ◽  
Ceramic Support ◽  
Trivalent Metal Ions ◽  
Mcm 41

This study aimed to assess the performance of three zeolite membranes in the removal of trivalent metal ions from aqueous solution using a cross-flow mode of operation. Three types of zeolite membrane, MCM-41, MCM-48 and FAU, were prepared on a low-cost, circular ceramic support by hydrothermal treatment. The three zeolite membranes were characterized by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and contact angle measurements. The XRD results confirmed the formation of zeolites. The deposition of zeolite on the ceramic support and hydrophilicity of zeolite membranes were monitored by FESEM and contact angle measurement, respectively. The pore size of the MCM-41, MCM-48 and FAU membrane was found to be 0.173 μm, 0.142 μm, and 0.153 μm, respectively, which was lower than that of the support (1.0 μm). The fabricated zeolite membranes were used to investigate the separation behavior of trivalent metal ions (Al3+ and Fe3+) from aqueous solution at various applied pressures. It was observed that an increase of applied pressure leads to a slight decrease in the removal efficiency. Among the various zeolite membranes, the FAU membrane showed the maximum rejection of 88% and 83% for Fe3+ and Al3+ separation, respectively.

Selective Aggregation of Polyanion-Coated Gold Nanorods Induced by Divalent Metal Ions in an Aqueous Solution

2010 ◽  
Vol 10 (5) ◽  
pp. 3538-3542 ◽  
Author(s):  
Young In Yang ◽  
Inhee Choi ◽  
Surin Hong ◽  
Suseung Lee ◽  
Taewook Kang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Gold Nanorods ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Selective Aggregation

Formation constants for magnesium and calcium citrate complexes

1980 ◽  
Vol 33 (7) ◽  
pp. 1511 ◽  
Author(s):  
KN Pearce
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Metal Ions ◽  
Formation Constants ◽  
Potassium Citrate ◽  
Divalent Metal ◽  
Calcium Citrate ◽  
Divalent Metal Ions ◽  
Citrate Complex

centration formation constants for magnesium and calcium citrate complexes have been redetermined from pH titrations of citric acid in the absence and presence of the divalent metal ions in aqueous solution at 2° Values for the constants, corrected for the presence of potassium citrate complex, are presented and critically compared with literature values. Values for the formation constants of strontium and barium citrate complexes are also reported.

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