Producción Científica Profesorado

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane



Galan Vidal, Carlos Andres

2005

M. E. Páez-Hernández, K. Aguilar-Arteaga, C. A. Galán-Vidal, M. Palomar-Pardavé, M. Romero-Romo, M. T. Ramírez-Silva. Mercury ions removal from aqueous solution using an activated composite membrane. Environmental Science & Technology. 39 (2005) 7667-7670.


Abstract


This work presents the results concerning the first use of activated composite membranes (ACMs) for the removal of Hg(II) ions from aqueous solution, using as the ligand di-(2-ethylhexyl)dithiophosphoric acid (DTPA). The effects on the removal percentage of Hg(II) of variables such as pH, the nature of the acid, the concentration of mercury (in the feed solutions), and the ligand content (in the membrane) as well as the total surface membrane area exposed to the Hg(II) aqueous solution were studied. During the course of the removal experiments, the membrane was immersed in the Hg(II) aqueous solution in acid media and samples of the solution were taken at different times to enable monitoring of the mercury concentration changes. It was found that when the ACM was prepared with a 1.0 M DTPA casting solution and the feed solution contained 2.49 × 10-4 M Hg(II) in HCl 0.1 M the amount of mercury extracted was higher than 93%. Straightforwardly, additional experiments were carried out with the free-DTPA composite membranes to make up a set of control reference points to verify that removal of the investigated heavy metal was a consequence of the presence of the organic ligand; otherwise there was no Hg(II) concentration variation at all.



Producto de Investigación




Artículos relacionados

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Dope...

Effect of TiO2-Al2O3 sol-gel supports on the superficial Ni and Mo species in oxidized and sulfided ...

Electrochemical kinetic study about cobalt electrodeposition onto GCE and HOPG substrates from sulfa...

Synthesis of Zn compounds derived from 1H-benzimidazol-2-ylmethanamine

Magnetic transition phase diagram of cobalt clusters electrodeposited on HOPG: Experimental and micr...

Nucleation and growth of cobalt onto different substrates: Part I. Underpotential deposition onto a ...

Cobalt electrodeposition on polycrystalline palladium. Influence of temperature on kinetic parameter...

Zinc Electrodeposition from Chloride Solutions onto Glassy Carbon Electrode

Influence of the Crystallinity of the Substrate on Kinetic Parameters of Zinc Electrodeposition Proc...

Evaluación de Esteroides Aromáticos como Indicadores de Madurez Térmica en Extractos de Roca