Abstract
The adsorption isotherms of phenol from aqueous solution onto adsorbents obtained from egg shell (ESA) andpalm shell (PSA) were investigated. The objectives of the investigation were to understand the effect of bothadsorbents on solution pH and to study the adsorption equilibrium of phenol onto the adsorbents. The effect ofadsorbent on pH of solution was studied by shaking the adsorbent of 0.1 to 1.5 g with 100 ml of acidic aqueoussolution for 30 min at room temperature. The adsorption experiments were performed by stirring appropriateamount of adsorbent with 100 ml of 50 mg/l concentration of phenol at constant temperature and pressure. TheLangmuir and Fraundlich adsorption models were applied to experimental data and the isotherm constants werecalculated using linier regression analysis. The results showed that the adsorption capacity of the adsorbentsincreases with increasing of dosage and contact time. Also, pH of solution affected the adsorption isotherm ofphenol, where maximum adsorption was observed at pH values lower than 9.
Highlights
Phenol and phenolic derivatives were commonly encountered in aquatic environment (Gupta et al, 1998; Flock et al, 1999)
The linearized plots obtained for the adsorption of phenol onto adsorbents derived from egg shell and palm shell were indicated by the linearities, R2, in Table 1, comfirming the validity of the Langmuir model for the adsorption
The investigations of isotherm adsorption of phenol onto adsorbents derived from egg shell (ESA) and palm shell (PSA) were performed
Summary
Phenol and phenolic derivatives were commonly encountered in aquatic environment (Gupta et al, 1998; Flock et al, 1999). Potential sources of phenolic compounds include the production and use of phenol and its products in industrial processes Many industries such as petroleum industry, chemical, plastics, pharmaceutical, drugs, wood, pulp and paper, and phenolic resin industries released large quantities of wastewater containing varieous concentration of phenolics (Juang et al, 1998; Asyhar, 2002a). The choice of egg shell is based on investigations reported by Van der Weijden and Comans (1997), and Wenming et al, (2001), that such material is mainly composed of calcium carbonate, i.e. calcite and calcareous soil, and they should be known as adsorbents. Activated carbon from palm-oil shell has be reported by Vilisand et al, (1999)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
