Aplication and chemical modification of silica-gel obtained from sand

Quimica nova

Padilha, Pedro M.¹  Prado, Alexandre G. S.²  Faria, Elaine A.² 

[1] Universidade Estadual Paulista, Botucatu;Universidade de Brasília, Brasília

关键词: silica;    teaching experiment;    adsorption.;   

DOI  :  10.1590/S0100-40422005000300030

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The silica gelwas obtained from sand and its surface was modified with POCl3 toproduce Si-Cl bonds on the silica surface. Ethylenediamine was covalently bondedonto the chlorinated silica surface. The adsorption of the chlorides of divalentcobalt, nickel and copper was qualitatively studied to show that the bondingof ethylenediamine onto the silica gel surface produces a solid base capableof chelating metal ions from solution. The experiments illustrate the extractionof silica gel, its reactivity, the development of modified surfaces and itsapplication in removing metal ions from water and are deigned for undergraduateinorganic chemistry laboratories.

【 授权许可】

CC BY