Adsorption behaviour of estrogenic contaminant, estriol, using Saponin and Brij 35 modified clinoptilolite: equilibrium, kinetic, and thermodynamic studies plus fixed bed modelling
by Reyhaneh Saadi; Reza Fazaeli; Leila Vafajoo; Iraj Naser; Ghodratollah Mohammadi
International Journal of Environment and Pollution (IJEP), Vol. 67, No. 1, 2020

Abstract: In this study, adsorption affinity of a raw clinoptilolite (RC) modified with Saponin (RC-Saponin) and Brij 35 (RC-Brij) surfactants was investigated to adsorb estriol (E3) from wastewater. The effect of pH, amount of sorbent, contact time, and temperature was evaluated. The results for RC and RC-Saponin confirmed that the Langmuir isotherm had an excellent agreement with the experimental data. However, for RC-Brij, the Freundlich model had excellent correlation with the experimental data. The results indicated that RC-Saponin was a more effective adsorbent compared to the two other samples. Moreover, the lumped technique was used to solve the bed equations, to predict the trend of the breakthrough curve, to obtain model parameters. The agreement between experimental data and kinetic models indicated that the intra-particle diffusion model had a better behaviour compared to other models. The thermodynamic parameters of Gibbs free energy, enthalpy, and entropy changes were obtained.

Online publication date: Fri, 10-Jul-2020

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Pollution (IJEP):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com