Adsorption behaviour of the zeolite, Controll M.F. 574^®in removing iron and manganese from natural water

Abstract

In this work, zeolite, Controll M.F. 574 ® was characterized and its adsorption properties were evaluated for the removal of iron (Fe) and manganese (Mn) from natural water, compared with a synthetic solution. Characterization by dispersive X-ray and X-ray diffraction identified a semi-crystalline structure and the presence of magnesium aluminium silicate, quartz and iron and manganese oxides. The results of the adsorption isotherms verified that the adsorption of iron followed a linear model indicating that physisorption occurred. The adsorption of manganese was better adjusted to the Langmuir model, indicating the formation of a monolayer on the surface of the adsorbent. The kinetic results were best adjusted to the pseudo-second-order model with a correlation coefficient of 0.99 for adsorption of both elements. The results showed that the zeolite studies showed good adsorption capacity for Fe (74%) and Mn (66%) in natural water. The concentrations of these metals were below the values permitted by Brazilian legislation.

Mineral Materials Coated with and Consisting of MnOx—Characteristics and Application of Filter Media for Groundwater Treatment: A Review

“…According to the statement, zeolites, depending on their origin, have a cation exchange capacity 64-229 meq/100 g [98]. These particular properties of zeolites determine their use for purifying water [65,83,95,[97][98][99][100]. The ammonium ion removal on clinoptilolite is of a practical application, since it is characterized among zeolites by the highest selectivity for the exchange of this component [98].…”