title: Concomitant degradation of bisphenol A during ultrasonication and Fenton oxidation and production of biofertilizer from wastewater sludge.
abstract: Degradation of bisphenol A (BPA), an endocrine disruptor, from wastewater sludge (WWS) has attracted great interest recently. In the present study, the effects of different pre-treatment methods, including ultrasonication (US), Fenton's oxidation (FO) and ferro-sonication (FS) was assessed in terms of increase in solubilization of WWS and simultaneous degradation of BPA. Among US, FO and FS pre-treatment, higher suspended solids (SS), volatile suspended solids (VSS), chemical oxygen demand (COD) and soluble organic carbon (SOC) solubilization (39.7%, 51.2%, 64.5% and 17.6%, respectively) was observed during a ferro-sonication pre-treatment process carried out for 180 min, resulting in higher degradation of BPA (82.7%). In addition, the effect of rheological parameters (viscosity and particle size) and zeta potential on the degradation of BPA in raw and different pre-treated sludges were also investigated. The results showed that a decrease in viscosity and particle size and an increase in zeta potential resulted in higher degradation of BPA. BPA degradation by laccases produced by Sinorhizobium meliloti in raw and pre-treated sludge was also determined. Higher activity of laccases (207.9 U L(-1)) was observed in ferro-sonicated pre-treated sludge (180 min ultrasonic time), resulting in higher removal of BPA (0.083 μg g(-1)), suggesting concomitant biological degradation of BPA.
authors.affiliation: INRS-ETE, Université du Québec, Québec, Canada.
authors.forename: D P
authors.initials: DP
authors.lastname: Mohapatra
authors.forename: S K
authors.initials: SK
authors.lastname: Brar
authors.forename: R D
authors.initials: RD
authors.lastname: Tyagi
authors.forename: R Y
authors.initials: RY
authors.lastname: Surampalli
mesh_terms: D001559:Benzhydryl Compounds; D005308:Fertilizers / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry* / Q000528:radiation effects; D007220:Industrial Waste / Q000517:prevention & control; D007501:Iron / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction / Q000528:radiation effects; D010636:Phenols / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage; D012722:Sewage / Q000737:chemistry*; D013010:Sonication / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D005308:Fertilizers; D006861:Hydrogen Peroxide; D007220:Industrial Waste; D007501:Iron; D010636:Phenols; D012722:Sewage; D014874:Water Pollutants, Chemical; C045076:Fenton's reagent; C006780:bisphenol A; D000098826:Bisphenol A Compounds