Seawater as auxiliary reagent in dual-temperature ion-exchange processing of acidic mine waters

Dmitri Muraviev; Joan Noguerol; Manuel Valiente

doi:10.1021/es960178e

Seawater as auxiliary reagent in dual-temperature ion-exchange processing of acidic mine waters

Dmitri Muraviev, Joan Noguerol, Manuel Valiente

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

18 Citations (Scopus)

Abstract

This paper reports the results of studying dual-temperature ion-exchange concentrations of Cu2+ from acidic mine waters on acrylic resin Lewatit R 250-K in applying seawater as a regenerant. Application of seawater as an auxiliary reagent has been shown to enhance selective concentration of copper. Loading of the resin in the initial seawater form with mine water at 20 °C followed by thermostripping with hot mine water at 80 °C has been shown to result in an 3-fold increase of copper concentration in the first portions of the eluete. The repetitive thermosorption-thermostripping concentration cycles appear to be less efficient and give around 25% increase of Cu2+ concentration. The applicability of seawater for regeneration of the resin in the course of ion-exchange treatment of mine water has been successfully demonstrated, and the flow sheet of a proposed process is presented.

Original language	English
Pages (from-to)	379-383
Journal	Environmental Science and Technology
Volume	31
Issue number	2
DOIs	https://doi.org/10.1021/es960178e
Publication status	Published - 1 Feb 1997

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title = "Seawater as auxiliary reagent in dual-temperature ion-exchange processing of acidic mine waters",

abstract = "This paper reports the results of studying dual-temperature ion-exchange concentrations of Cu2+ from acidic mine waters on acrylic resin Lewatit R 250-K in applying seawater as a regenerant. Application of seawater as an auxiliary reagent has been shown to enhance selective concentration of copper. Loading of the resin in the initial seawater form with mine water at 20 °C followed by thermostripping with hot mine water at 80 °C has been shown to result in an 3-fold increase of copper concentration in the first portions of the eluete. The repetitive thermosorption-thermostripping concentration cycles appear to be less efficient and give around 25% increase of Cu2+ concentration. The applicability of seawater for regeneration of the resin in the course of ion-exchange treatment of mine water has been successfully demonstrated, and the flow sheet of a proposed process is presented.",

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N2 - This paper reports the results of studying dual-temperature ion-exchange concentrations of Cu2+ from acidic mine waters on acrylic resin Lewatit R 250-K in applying seawater as a regenerant. Application of seawater as an auxiliary reagent has been shown to enhance selective concentration of copper. Loading of the resin in the initial seawater form with mine water at 20 °C followed by thermostripping with hot mine water at 80 °C has been shown to result in an 3-fold increase of copper concentration in the first portions of the eluete. The repetitive thermosorption-thermostripping concentration cycles appear to be less efficient and give around 25% increase of Cu2+ concentration. The applicability of seawater for regeneration of the resin in the course of ion-exchange treatment of mine water has been successfully demonstrated, and the flow sheet of a proposed process is presented.

AB - This paper reports the results of studying dual-temperature ion-exchange concentrations of Cu2+ from acidic mine waters on acrylic resin Lewatit R 250-K in applying seawater as a regenerant. Application of seawater as an auxiliary reagent has been shown to enhance selective concentration of copper. Loading of the resin in the initial seawater form with mine water at 20 °C followed by thermostripping with hot mine water at 80 °C has been shown to result in an 3-fold increase of copper concentration in the first portions of the eluete. The repetitive thermosorption-thermostripping concentration cycles appear to be less efficient and give around 25% increase of Cu2+ concentration. The applicability of seawater for regeneration of the resin in the course of ion-exchange treatment of mine water has been successfully demonstrated, and the flow sheet of a proposed process is presented.

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