Hidróxidos duplos lamelares à base de escória de alto forno

Química Nova

Monaliza Maia Rebelo¹  Márcia Valéria Porto De Oliveira Cunha¹  José Augusto Martins Corrêa¹ 

[1] ,Universidade Federal do Pará Instituto de Geociências Belém PA ,Brasil

关键词: blast furnace slag;    layered double hydroxides (LDHs);    syntheses;   

DOI  :  10.1590/S0100-40422012000500004

来源: SciELO

【 摘 要 】

Hydrotalcite like compounds (HT) were prepared by co-precipitation (Mg/Al = 3.5), using an acid solution with blast furnace slag and MgCl2.6H2O and aqueous solutions of NaOH. The following synthesis variables were investigated: temperature (30 and 45 ºC) and pH (9 and 12). Depending of the temperature two systems were observed: Mg-Al-CO3 (T = 30 ºC); Mg-Al-Cl-CO3 (T = 45 ºC). An increase in the pH of synthesis and Mg2+ concentration produced HTs well-crystallized and with greater values of all cell parameters. The study showed the potentiality of BFS in the synthesis of well-crystallized LDHs without the presence of other crystalline phases.

【 授权许可】

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