title: Removal of chlorinated pollutants by a combination of ultrasound and biodegradation.
abstract: Chlorinated organic compounds are hazardous pollutants found in waste water, surface water, and ground water. Our study shows that a combination of ultrasonic pretreatment and biodegradation effectively removes the solvent chlorobenzene and the disinfectant 2,4-dichlorophenol, also reduces Adsorbable Organic Halogens (AOX) and Chemical Oxygen Demand (COD). In our experiments, the ultrasonic dechlorination was not influenced by the presence of other soluble organic compounds like acetate or glucose. Dechlorination of chlorobenzene by ultrasound did not lead to toxic or inhibiting reaction products. More than that, the ultrasonic pretreatment significantly reduced the toxicity of 2,4-dichlorophenol and biological activity was initiated after sonication. Residual organic pollutants after ultrasonic pretreatment were eliminated by biodegradation.
authors.affiliation: Technical University of Hamburg-Harburg, Department of Sanitary Engineering, Eissendorfer Str. 42, 21073 Hamburg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Tiehm
authors.forename: I
authors.initials: I
authors.lastname: Kohnagel
authors.forename: U
authors.initials: U
authors.lastname: Neis
mesh_terms: D000871:Anthelmintics / Q000378:metabolism* / Q000633:toxicity; D001673:Biodegradation, Environmental; D002722:Chlorobenzenes / Q000378:metabolism* / Q000633:toxicity; D002733:Chlorophenols / Q000378:metabolism* / Q000633:toxicity; D018675:Toxicity Tests; D014465:Ultrasonics; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000378:metabolism / Q000633:toxicity
chemical_list: D000871:Anthelmintics; D002722:Chlorobenzenes; D002733:Chlorophenols; D014873:Water Pollutants; C031294:chlorobenzene; C004762:2,4-dichlorophenol