TY - GEN
T1 - Treatment of emerging pathogens and micropollutants with potassium ferrate(VI)
AU - Hu, Lanhua
AU - Page, Martin
AU - Mariñas, Benito
AU - Shisler, Joanna L.
AU - Strathmann, Timothy J.
PY - 2008
Y1 - 2008
N2 - Potassium ferrate (K2FeO4, Fe(VI)), a powerful and environmentally friendly oxidizing agent, is attracting growing attention as an emerging water treatment chemical. This study reports on recent work examining the effectiveness of Fe(VI) for oxidation of pharmaceutically active compounds (PhACs) and inactivation of viral pathogens (surrogate pathogen: coliphage MS2) during water treatment. Twelve PhACs from representative compound classes were screened to assess potential reactivity with Fe(VI) on timescales of interest to water utilities. Eight of the 12 PhACs surveyed, including the antiepileptic drug carbamazepine and phenolic endocrine disruptor compounds (EDCs), were found to have moderate to high reactivity with Fe(VI). Results also show that Fe(VI) is an effective disinfectant for MS2 phage. The CT value for 99% inactivation of MS2 is ∼2 mg-min L-1 as Fe at pH 7 and 25 °C. Both rates of PhAC oxidation and virus inactivation are highly dependent upon solution pH, increasing with decreasing pH as Fe(VI) speciation shifts towards more reactive protonated species (HFeO4- and H2FeO 4). Kinetic models that consider changing speciation of both Fe(VI) and the reacting PhAC or virus, illustrated for the case of carbamazepine, were developed to account for pH-dependent reactivity trends.
AB - Potassium ferrate (K2FeO4, Fe(VI)), a powerful and environmentally friendly oxidizing agent, is attracting growing attention as an emerging water treatment chemical. This study reports on recent work examining the effectiveness of Fe(VI) for oxidation of pharmaceutically active compounds (PhACs) and inactivation of viral pathogens (surrogate pathogen: coliphage MS2) during water treatment. Twelve PhACs from representative compound classes were screened to assess potential reactivity with Fe(VI) on timescales of interest to water utilities. Eight of the 12 PhACs surveyed, including the antiepileptic drug carbamazepine and phenolic endocrine disruptor compounds (EDCs), were found to have moderate to high reactivity with Fe(VI). Results also show that Fe(VI) is an effective disinfectant for MS2 phage. The CT value for 99% inactivation of MS2 is ∼2 mg-min L-1 as Fe at pH 7 and 25 °C. Both rates of PhAC oxidation and virus inactivation are highly dependent upon solution pH, increasing with decreasing pH as Fe(VI) speciation shifts towards more reactive protonated species (HFeO4- and H2FeO 4). Kinetic models that consider changing speciation of both Fe(VI) and the reacting PhAC or virus, illustrated for the case of carbamazepine, were developed to account for pH-dependent reactivity trends.
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M3 - Conference contribution
AN - SCOPUS:84871589258
SN - 9781605609935
T3 - Water Quality Technology Conference and Exposition 2008
SP - 3485
EP - 3492
BT - Water Quality Technology Conference and Exposition 2008
T2 - Water Quality Technology Conference and Exposition 2008
Y2 - 16 November 2008 through 20 November 2008
ER -