A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS

An efficient wastewater treatment for metal removal is based on the precipitation of metal ferrites by addition of iron(II) in alkaline and oxidizing conditions. The maximum efficiency is achieved for an iron(II)/total metal ratio of 15:1 (w:w) (Barrado et al., 1996a) which implies that the total me...

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Autores principales:	Prieto García,Francisco, Barrado Esteban,Enrique, Vega,Marisol, Debán,Luis
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2005
Materias:	wastewater treatment conductivity metal removal ferrite
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000300004
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spelling	oai:scielo:S0717-970720050003000042005-11-23A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTSPrieto García,FranciscoBarrado Esteban,EnriqueVega,MarisolDebán,Luis wastewater treatment conductivity metal removal ferrite An efficient wastewater treatment for metal removal is based on the precipitation of metal ferrites by addition of iron(II) in alkaline and oxidizing conditions. The maximum efficiency is achieved for an iron(II)/total metal ratio of 15:1 (w:w) (Barrado et al., 1996a) which implies that the total metal concentration must be known. It has been established a linear empirical correlation (R²=0.997) between wastewater conductivity and the total metal concentration that allows a rapid estimation of the amount of iron(II) to be added for metal precipitation with no need of time-consuming metal analysis. The empirical correlation obtained overestimates the total metal concentration, and therefore the added iron(II), thus assuring maximum efficiency of metal removal. The occurrence of metal complexing substances modifies the wastewater ionic composition decreasing the conductivity measurements and the estimated metal concentration. However, it has been demonstrated that the estimated amount of iron(II) is still in excess to assure maximum metal precipitationinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.50 n.3 20052005-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000300004en10.4067/S0717-97072005000300004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	wastewater treatment conductivity metal removal ferrite
spellingShingle	wastewater treatment conductivity metal removal ferrite Prieto García,Francisco Barrado Esteban,Enrique Vega,Marisol Debán,Luis A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS
description	An efficient wastewater treatment for metal removal is based on the precipitation of metal ferrites by addition of iron(II) in alkaline and oxidizing conditions. The maximum efficiency is achieved for an iron(II)/total metal ratio of 15:1 (w:w) (Barrado et al., 1996a) which implies that the total metal concentration must be known. It has been established a linear empirical correlation (R²=0.997) between wastewater conductivity and the total metal concentration that allows a rapid estimation of the amount of iron(II) to be added for metal precipitation with no need of time-consuming metal analysis. The empirical correlation obtained overestimates the total metal concentration, and therefore the added iron(II), thus assuring maximum efficiency of metal removal. The occurrence of metal complexing substances modifies the wastewater ionic composition decreasing the conductivity measurements and the estimated metal concentration. However, it has been demonstrated that the estimated amount of iron(II) is still in excess to assure maximum metal precipitation
author	Prieto García,Francisco Barrado Esteban,Enrique Vega,Marisol Debán,Luis
author_facet	Prieto García,Francisco Barrado Esteban,Enrique Vega,Marisol Debán,Luis
author_sort	Prieto García,Francisco
title	A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS
title_short	A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS
title_full	A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS
title_fullStr	A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS
title_full_unstemmed	A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS
title_sort	rapid estimation of metal contents in wastewater treatment for conductivity measurements
publisher	Sociedad Chilena de Química
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000300004
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A RAPID ESTIMATION OF METAL CONTENTS IN WASTEWATER TREATMENT FOR CONDUCTIVITY MEASUREMENTS

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