Abstract
Polyporus squamosus was tested for its ability to absorb Fe(III) ions from solutions. Kinetic and isotherm sorption experiments were conducted to evaluate the effects of contact time, pH, metal concentration, dose of the adsorbent, ionic strength and glucose. The increases in initial concentration of metal and pH of the solutions resulted in an increase in iron uptake. The equilibrium data could be fitted by Langmuir and Freundlich isotherm equation. Both Langmuir and Freundlich sorption models adequately describe the biosorption of Fe(III) by P. squamosus. Maximum metal uptake capacities of P. sqamosus biomass (qm) were found as 31.2, 18.1 and 12.2 mg/g for 1.5, 3.3 and 6.6 g biomass/l, respectively. With increasing ionic strength, there is a decrease in the metal uptake (qm) as well as coefficient b in Langmuir equation. It was noticed that lower concentrations of glucose resulted in higher rates and amounts of Fe(III) adsorption, while its concentration above 0.1% (w/v) reduced substantially the ability of the cells to absorb this metal.
Highlights
The production of heavy metals has increased rapidly since the industrial revolution (Ayres, 1992)
At the very begining of the experiment, the pH falls from 6.5 to a value of 4.3. These results are in accordance with the data of Selatnia et al (2004) who suggested that the biosorption mechanism is a ion exchange type between H+ ions and Fe3+ ions, i.e. this can be explained by H+ liberation of some compounds of the biomass in solution
Adsorption is influenced by various parameters such as initial pH, initial Fe(III) concentration, biomass concentration, ionic strength, glucose concentration
Summary
The production of heavy metals has increased rapidly since the industrial revolution (Ayres, 1992). The effect of various operational parameters such as biomass and metal concentrations, pH, ionic strength and addition of glucose to the metal-containing solutions on the adsorption of the metals were studied. To evaluate the adsorptive capacity of P. squamosus in adsorbing Fe (III) from solution, the most commonly used adsorption isotherm models (Freundlich and Langmuir) were used.
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.
