Fenton-coagulation process for simultaneous abatement of micropollutants and dissolved organic carbon in treated wastewater

被引:2
作者
Kim, Cheolyong [1 ,2 ]
Debusmann, Philipp [1 ]
Abdighahroudi, Mohammad Sajjad [1 ]
Schumacher, Jochen [3 ,4 ]
Lutze, Holger, V [1 ,5 ,6 ,7 ]
机构
[1] Tech Univ Darmstadt, Inst IWAR, Dept Civil & Environm Engn, Chair Environm Analyt & Pollutants, Franziska Braun Str 7, D-64287 Darmstadt, Germany
[2] Incheon Natl Univ, Dept Environm Engn, 119 Acad Ro, Incheon 22012, South Korea
[3] Evon Operat GmbH, Rodenbacher Chaussee 4, D-63457 Hanau, Germany
[4] BHU Umwelttechn GmbH, Einsteinstr 57, D-71229 Leonberg, Germany
[5] IWW Water Ctr, Moritzstra 26, D-45476 Mulheim An Der Ruhr, Germany
[6] Ctr Water & Environm Res ZWU, Univ Str 5, D-45141 Essen, Germany
[7] Kompetenzzentrum Wasser Hessen, Max von Laue Str 13, D-60438 Frankfurt, Germany
关键词
Fenton; Flocculation; Pollutant degradation; Wastewater; Reactive species; Hydroxyl radicals; ZERO-VALENT IRON; PERFLUOROOCTANOATE PFOA; OXIDATION; DEGRADATION; PRODUCTS; KINETICS; REACTIVITY; RADICALS; MATTER; FE(IV);
D O I
10.1016/j.watres.2025.123583
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study demonstrates the integration of the Fenton reaction into the flocculation process at circumneutral pH (6-7), offering a practical approach for simultaneous micropollutant and organic matter removal in wastewater treatment. Unlike conventional Fenton oxidation, which requires acidic conditions, this approach allows Fe(II) to react with hydrogen peroxide at near-neutral pH, forming Fe(III) flocs that enhance flocculation while also generating reactive species for pollutant degradation. At pH 6, hydroxyl radicals were the dominant oxidants, whereas at pH 7, additional reactive species likely contributed to micropollutant removal. Bisphenol A and benzoic acid were removed by approximately 90% at 1 mM peroxide and 2 mM iron. In addition to micropollutant degradation, the Fenton-coagulation process achieved substantial dissolved organic carbon (DOC) removal, which was not observed with Fenton oxidation alone or ozonation. DOC removal was up to 51% in Suwannee River Natural Organic Matter solutions, whereas only 30% of DOC was removed from municipal wastewater effluent, likely due to differences in organic matter composition. These findings highlight the potential of Fenton-coagulation as an effective and scalable treatment strategy for wastewater reuse, improving both pollutant degradation and organic matter removal under practical conditions.
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页数:9
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