Moringa oleifera Lam. seeds as a natural solid adsorbent for removal of AgI in aqueous solutions

Journal of the Brazilian Chemical Society

Cleide S. T Araújo¹  Edmar I Melo¹  Vanessa N Alves¹  Nívia M. M Coelho¹ 

关键词: removal;    characterization;    sorption;    Moringa oleifera;    silver;   

DOI  :  10.1590/S0103-50532010000900019

来源: SciELO

【 摘 要 】

This work describes the sorption potential of Moringa oleifera seeds for the decontamination of AgI in aqueous solutions. Infrared spectroscopy was used for elucidating possible functional groups responsible for uptaking AgI. Sorption studies using AgI standard solutions were carried out in batch experiments as functions of adsorbent mass, extraction time, particle size and pH. The AgI was quantified before and after the removal experiments using flame atomic absorption spectrometry. Furthermore, based on adsorption studies and adsorption isotherms applied to the Langmuir model, it was possible to verify that M. oleifera seeds present a high adsorption capacity. The optimum conditions were: 2.0 g of adsorbent with particle size of 75-500 µm, 100 mL of 25.0 mg L-1 AgI, extraction time of 20 min and pH at 6.5. The results show that Moringa oleifera seeds can be used for removing AgI in aqueous solutions.

【 授权许可】

CC BY   
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