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Ultrason Sonochem

Title:		Concomitant degradation of bisphenol A during ultrasonication and Fenton oxidation and production of biofertilizer from wastewater sludge
Author(s):		Mohapatra DP; Brar SK; Tyagi RD; Surampalli RY;
Address:		"INRS-ETE, Universite du Quebec, Quebec, Canada"
Journal Title:		Ultrason Sonochem
Year:		2011
Volume:		20110403
Issue:		5
Page Number:		1018 - 1027
DOI:		10.1016/j.ultsonch.2011.03.013
ISSN/ISBN:		1873-2828 (Electronic) 1350-4177 (Linking)
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 mug g(-1)), suggesting concomitant biological degradation of BPA"
Keywords:		Benzhydryl Compounds Fertilizers/*analysis Hydrogen Peroxide/*chemistry/radiation effects Industrial Waste/prevention & control Iron/*chemistry/radiation effects Oxidation-Reduction/radiation effects Phenols/*chemistry/*radiation effects Radiation Dosage;
Notes:		"MedlineMohapatra, D P Brar, S K Tyagi, R D Surampalli, R Y eng Research Support, Non-U.S. Gov't Netherlands 2011/04/06 Ultrason Sonochem. 2011 Sep; 18(5):1018-27. doi: 10.1016/j.ultsonch.2011.03.013. Epub 2011 Apr 3"