title: The comparision of Coprinus cinereus peroxidase enzyme and TiO2 catalyst for phenol removal.
abstract: This article investigates phenol removal from an aqueous solution by using enzymatic and photocatalytic methods and the efficiency of these methods has been compared. In enzymatic and photocatalytic methods, Coprinus cinereus, peroxidase enzyme and commercial TiO(2) powders (Degussa P-25) in aqueous suspension were used, respectively, in ambient temperature. The effects of different operating parameters such as duration of process, catalyst dosage or enzyme concentration, pH of the solution, initial phenol concentration and H(2)O(2) concentration on both processes were examined. In enzymatic method, efficiency of degradation reached 100% within 5 min, while in the photocatalytic method, the efficiency of degradation reached approximately 70% within 60 min. In photocatalytic method, there is an optimum concentration for catalyst dosage (near 2.0 g/L) to gain 80% efficiency, while in the enzymatic method, increasing the amount of enzyme could lead to an increase in the efficiency up to 100%. Moreover, the optimum pH in enzymatic and photocatalytic methods stood at 8.0 and 7.0, respectively. In both methods, the addition of different amounts of H(2)O(2) increased the degradation efficiency to 100%.
authors.affiliation: School of Chemical Engineering, College of Engineering, University of Tehran (UT), Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Sarkhanpour
authors.forename: Omid
authors.initials: O
authors.lastname: Tavakoli
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Sarrafzadeh
authors.forename: Hamid Reza
authors.initials: HR
authors.lastname: Kariminia
mesh_terms: D003302:Coprinus / Q000201:enzymology; D009195:Peroxidase / Q000378:metabolism; D019800:Phenol / Q000737:chemistry* / Q000378:metabolism*; D010782:Photolysis; D013053:Spectrophotometry; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D019800:Phenol; D014025:Titanium; D009195:Peroxidase