Study of adsorption and preconcentration by using a new silica organomodified with [3-(2,2′-dipyridylamine)propyl] groups

In this work, a silica surface chemically modified with [3‐(2,2′‐dipyridylamine)propyl] groups, named [3‐(2,2′‐dipyridylamine)propyl]silica (Si‐Pr‐DPA) was prepared, characterized, and evaluated for its heavy metal adsorption characteristics from aqueous solution. To our knowledge, we are the first...

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Bibliographic Details
Published in:	Journal of separation science Vol. 36; no. 4; pp. 817 - 825
Main Authors:	Soares, Isaac Vaz, Vieira, Eduardo Guimarães, Dias Filho, Newton Luiz, da Silva, Niléia Cristina, Bastos, Andréa de Castro, Lima, Lucélia Julia A., Fraceto, Leonardo Fernandes, Rosa, André Henrique
Format:	Journal Article
Language:	English
Published:	Weinheim Blackwell Publishing Ltd 01-02-2013 Wiley Wiley Subscription Services, Inc
Subjects:	Adsorption Analysis methods Analytic Sample Preparation Methods - methods Analytical chemistry Applied sciences Aqueous chemistry Aqueous solutions Chemistry Chromatographic methods and physical methods associated with chromatography Exact sciences and technology Heavy metals Infrared spectroscopy Isotherms Ligands Metal Metals, Heavy - chemistry Natural water pollution Other chromatographic methods Pollution Preconcentration Silica Silicon dioxide Silicon Dioxide - chemistry Standard reference materials Surface chemistry Water Pollutants, Chemical - chemistry Water treatment and pollution Fourier transformation Chemical analysis Lead Compounds Transition metal Compounds Adsorption isotherm Adsorption capacity NMR spectrometry Metal Silica Pyridine derivatives Chemical enrichment Surface structure Characterization Silicon 29 Preconcentration Silica gel Adsorbent Carbon 13 Trace analysis Scanning electron microscopy Graphite furnace Heavy metal Infrared spectrometry Solid state Chemical modification Adsorption Isotherms Morphology Preparation Surface water Water pollution Column chromatography Bonded stationary phase Atomic absorption spectrometry
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Summary:	In this work, a silica surface chemically modified with [3‐(2,2′‐dipyridylamine)propyl] groups, named [3‐(2,2′‐dipyridylamine)propyl]silica (Si‐Pr‐DPA) was prepared, characterized, and evaluated for its heavy metal adsorption characteristics from aqueous solution. To our knowledge, we are the first authors who have reported the present modification. The material was characterized using infrared spectroscopy, SEM, and NMR 29Si and 13C solid state. Batch and column experiments were conducted to investigate for heavy metal removal from dilute aqueous solution by sorption onto Si‐Pr‐DPA. From a number of studies the affinity of various metal ions for the Si‐Pr‐DPA sorbent was determined to follow the order Fe(III) > Cr(III) >> Cu(II) > Cd(II) > Pb(II) > Ni(II). Two standard reference materials were used for checking the accuracy and precision of the method. The proposed method was successfully applied to the analysis of environmental samples. This ligand material has great advantage for adsorption of transition‐metal ions from aqueous medium due to its high degree of organofunctionalization associated with the large adsorption capacity, reutilization possibility, and rapidity in reaching the equilibrium.
Bibliography:	istex:69F9E856743EE88D09C10789ADD6C1B9D3C4ABAD FAPESP-Fundação de Amparo a Pesquisa do Estado de São Paulo - No. 2011/18086-3 ark:/67375/WNG-PQGVKRLD-6 ArticleID:JSSC3129 CNPq-Conselho Nacional de Desenvolvimento Científico e Tecnológico - No. 304714/2009-7 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	1615-9306 1615-9314
DOI:	10.1002/jssc.201200565