Removal of the hormones 17β-estradiol and 17α-ethinylestradiol from aqueous solutions employing a decomposed peat as adsorbent material

Quimica nova

Sierra, Maria M. D¹  Grassi, Marco T²  Esteves, Valdemar I³  Fernandes, Andreia N⁴  Giovanela, Marcelo⁴  Almeida, Carlos A. P⁵ 

[1] Universidade Federal de Santa Catarina, Florianópolis, Brasil;Universidade Federal do Paraná, Paraná, Brasil;Universidade de Aveiro, Aveiro, Portugal;Universidade de Caxias do Sul, Caxias do Sul, Brasil;Universidade do Estadual do Centro Oeste, Guarapuava, Brasil

关键词: estradiol;    adsorption;    peat.;   

DOI  :  10.1590/S0100-40422011000900009

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This paper describes the adsorption of 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) from aqueous solution by decomposed peat. The peat presented a good adsorption process, close to 76.2% for E2 removal and approximately 55.0% for EE2. Moreover, the results indicated a probable multi-layered process. Adsorption isotherms were well fitted by Freundlich model. The data were evaluated considering the pseudo-first-order and pseudo-second-order approaches, being the second more significant mechanism in the rate-controlling step. Thermodynamic data revealed that hormones adsorption onto peat is spontaneous under the employed experimental conditions. The results confirmed the potential of this adsorbent to be employed for effluents treatment.

【 授权许可】

CC BY