Removal of 17-α Ethinylestradiol from Water Systems by Adsorption on Polyacrylonitrile Beads: Isotherm and Kinetics Studies
Journal Title: Annals of Environmental Science and Toxicology - Year 2017, Vol 2, Issue 1
Abstract
An investigation on the removal of 17-a-Ethinyl Estradiol (EE2) from aqueous solutions using Polyacrylonitrile (PAN) beads has been carried out under closed conditions. The kinetic and equilibrium results obtained for EE sorption with different initial concentrations have been analyzed. Experimental data at equilibrium have been correlated with the Langmuir, Freundlich, Tempkin, and Dubinin–Radushkevich (D–R) isotherm models. The applicability of the isotherm equations to the adsorption system has been compared by means of the correlation coefficients. The adsorption data resulted fitted well by the Freundlich isotherm model. Kinetic analysis was performed with three different types of kinetic adsorption models using the pseudo-first-order, pseudo-second-order, and simple Elovich models. Analysis of the kinetic data indicated that the EE2 adsorption was a second-order process. Diffusion mechanisms have been analyzed by means of the diffusion rate equations inside particulate of Dumwald–Wagner and intraparticle models. The actual rate-controlling step involved in the EE sorption process was determined by further analysis of the sorption data by the kinetic expression given by Boyd. All together these results allowed to understand the adsorption mechanism of the process and have shown the usefulness in using PAN beads in removing EE2 from synthetic aqueous solutions, also at concentrations higher than those measured in the environment.
Authors and Affiliations
Mita Luigi, Forte Maurizio, Rossi Adriana, Adamo Claudia, Guida Marco, Portaccio Marianna, Godievargova Tzonka, Samir Mohamed, Eldin Mohy
Keywords
Related Articles
- EP ID EP560450
- DOI 10.17352/pjest.000012
- Views 65
- Downloads 0
Evaluation of Physico-Chemical Parameters and Minerals Status of Different Water Sources at High Altitude
Physico-chemical properties and minerals status is an important decisive factor for assessment of drinking water quality. There are limited literatures on this aspect for drinking water quality of high altitude areas; th...
Haze Disaster in South East Asia: An Urgent Study on the Effect of Dioxins to the Firefighters
Firefighters may be exposed to a wide variety of toxic chemicals in their line of work, including volatile organic compounds, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), brominated flame re...
Particulate matter (PM10) and oxides of Nitrogen (NOx) each independently predict respiratory emergency outcomes
Background: The impact of environmental air pollutants on the outcome of an emergency hospitalisation of respiratory patients has received limited study. We report on how levels of pollutants, particulate matter levels (...
Boron Levels in Drinking Water Sources from the Volcanic Area of Sicily (South Italy): Risk Evaluation of Developing Chronic Systemic Effects
Short- and long-term oral exposures to boric acid or borax demonstrated boron toxicity in reproductive system. European Union standard of boron in drinking water has a maximum allowable concentration of 1 mg/L, but in Si...
Fluoride Sources, Toxicity and Its Amelioration: A Review
In recent scenario, fluorosis is now going to be a severe problem throughout the globe due to toxic effects of fluoride (F) on both plants and animals. F presents in the halogenated group of the periodic table and has th...