Sorption of crystal violet by polyurethane foam from aqueous medium containing sodium dodecylsulfate

Quimica nova

Mori, Mariana¹  Cassella, Ricardo J.¹ 

[1] Universidade Federal Fluminense, Niterói, Brasil

关键词: polyurethane foam;    crystal violet;    solid phase extraction.;   

DOI  :  10.1590/S0100-40422009000800011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work presents a detailed study about the sorption of crystal violet (CV) cationic dye onto polyether type polyurethane foam (PUF). The sorption process was based on the formation of an ionic-pair between cationic dye and dodecylsulfate anion (SDS), which presented high affinity by PUF. Set-up employed in the study was built up by adjusting a 200 mg cylinder of PUF to the arm of an overhead stirrer. The system was characterized in relation to equilibrium and kinetic aspects and it was modeled by employing Langmuir and Freundlich isotherms. Obtained results showed that the ratio between SDS and MB concentrations played an important role on the sorption process. According to results found it was possible to retain up to 3.4 mg of dye from 200 mL of a 5.0 x 10-5 mol L-1 CV solution containing 1.25 x 10-4 mol L-1 SDS, which represented a removal efficiency of around 92%.

【 授权许可】

CC BY