Details

Autor(en) / Beteiligte

• 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

Titel

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

Ist Teil von

• Journal of separation science, 2013-02, Vol.36 (4), p.817-825

Ort / Verlag

Weinheim: Blackwell Publishing Ltd

Erscheinungsjahr

2013

Quelle

Wiley-Blackwell Full Collection

Beschreibungen/Notizen

• 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.