title: Enhancement removal of endocrine-disrupting pesticides and nitrogen removal in a biofilm reactor coupling of biodegradable Phragmites communis and elastic filler for polluted source water treatment.
abstract: The coupling of conventional elastic filler and solid carbon source of Phragmites communis (P. communis) as the biofilm support was applied in a biofilm system for treating polluted source water containing nitrogen and trace endocrine-disrupting pesticides (cypermethrin and chlorpyrifos). Results showed that removal efficiencies of TN and EDPs were improved with addition of 3.6kg P. communis/m(3) in the biofilm system. Meanwhile, the uniform distribution of P. communis favored simultaneously nitrogen and organics removal but not to trace EDPs compared with non-uniform distribution of P. communis. The biofilm on elastic filler was mainly responsible for the nitrification with NH4(+)-N oxidation efficiency of 82.9±1.5%. Poor nitrification with NH4(+)-N oxidation efficiency of 36.3±6.1% but effective denitrification with a TN removal efficiency of 56.5±2.0% were obtained by the biofilm on P. communis. Cypermethrin was mainly removed via adsorption and microbial degradation, and chlorpyrifos removal mostly depended on the microbial degradation in biofilm system.
authors: Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, PR China; Department of Environmental Engineering, Zhejiang University, No. 866 Yuhangtang Road, Hangzhou 310058, PR China.
authors: Lijuan
authors: L
authors: Feng
authors: Department of Environmental Engineering, Zhejiang University, No. 866 Yuhangtang Road, Hangzhou 310058, PR China.
authors: Guangfeng
authors: G
authors: Yang
authors: Department of Environmental Engineering, Zhejiang University, No. 866 Yuhangtang Road, Hangzhou 310058, PR China. Electronic address: felix79cn@hotmail.com.
authors: Liang
authors: L
authors: Zhu
authors: Department of Environmental Engineering, Zhejiang University, No. 866 Yuhangtang Road, Hangzhou 310058, PR China.
authors: Xiangyang
authors: X
authors: Xu
authors: Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, PR China.
authors: Feng
authors: F
authors: Gao
authors: Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, PR China.
authors: Jun
authors: J
authors: Mu
authors: Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, PR China.
authors: Yanmei
authors: Y
authors: Xu
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D019149:Bioreactors / Q000382:microbiology; D052244:Endocrine Disruptors / Q000302:isolation & purification / Q000378:metabolism*; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D010575:Pesticides / Q000302:isolation & purification / Q000378:metabolism*; D006109:Poaceae / Q000382:microbiology*; D014462:Ultrafiltration / Q000295:instrumentation; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation
chemical_list: D052244:Endocrine Disruptors; D010575:Pesticides; D014874:Water Pollutants, Chemical; D009584:Nitrogen
keywords: Biofilm; Endocrine-disrupting pesticides; Nitrogen removal; Phragmites communis (P. communis); Polluted source water