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|Title:||Evaluation of pretreatments for inhibiting bromate formation during ozonation||Authors:||Andersen, Henrik R.
Antoniou, Maria G.
|Keywords:||Bromate;Chlorine;Ozone;Carbamazepine;Ammonia||Issue Date:||2012||Publisher:||Taylor & Francis||Source:||Environmental Technology, 2012, Volume 33, Issue 15, Pages 1747-1753||Abstract:||This study compared several pretreatment methods for inhibiting BrO−3 formation during ozonation of tap water, fromtheDTU (Technical University of Denmark) campus, including H2O2 addition (peroxone), pH depression, and NH+4 and Cl2/NH+4 addition. At the same time, the inhibition of atrazine and carbamazepine removal was evaluated for each pretreatment. The required delivered O3 dose to achieve 90% removal of atrazine in the tap water from the DTU campus was 3.5 mg/L, which produced 130–170μg/L BrO−3 . Peroxone did not reduce the required O3 dose for contaminant removal; however, it limited BrO−3 formation to below the drinking water limit of 10μg/L. Depression of solution pH to 6.0, reduced BrO−3 formation to half, but it was still well above the water limit. Pretreatment with NH+4 also reduced BrO−3 formation by approximately 50%, though it reduced atrazine degradation to 65%. Pretreatment with Cl2/NH+4 reduced BrO−3 formation close to the 10μg/L limit; however, atrazine removal did not exceed 75%. Carbamazepine was completely removed under all the tested experimental conditions with the 3.5 mg/L O3 dose.||URI:||http://ktisis.cut.ac.cy/handle/10488/6588||ISSN:||0959-3330 (print)
|DOI:||10.1080/09593330.2011.644586||Rights:||© 2012 Taylor & Francis||Type:||Article|
|Appears in Collections:||Άρθρα/Articles|
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