TY - JOUR T1 - Enhanced Treatment of Municipal Wastewater Effluents by Fe-TAML/H2O2: Efficiency of Micropollutant Abatement. AU - Jans,Urs, AU - Prasse,Carsten, AU - von Gunten,Urs, Y1 - 2021/02/15/ PY - 2021/2/16/pubmed PY - 2021/4/24/medline PY - 2021/2/15/entrez SP - 3313 EP - 3321 JF - Environmental science & technology JO - Environ Sci Technol VL - 55 IS - 5 N2 - Combining iron with a tetraamido-macrocyclic ligand (Fe-TAML) as a catalyst and with hydrogen peroxide (H2O2) as the bulk oxidant is a process that has been suggested for the oxidative abatement of micropollutants during water treatment. In this study, the reactivity of the Fe-TAML/H2O2 system was evaluated by investigating the degradation of a group of electron-rich organic model compounds with different functional groups in a secondary wastewater effluent. Phenolic compounds and a polyaromatic ether are quickly and substantially abated by Fe-TAML/H2O2 in a wastewater effluent. For tertiary amines, a moderate rate of abatement was observed. Primary and secondary amines, aromatic ethers, aromatic aldehydes, and olefins are oxidized too slowly in the investigated Fe-TAML/H2O2 systems to be significantly abated in a secondary wastewater effluent. Trichlorophenol is readily oxidized to chloromaleic acid and chlorofumaric acid, which support a one-electron transfer reaction as the initial step of the reaction between Fe-TAML/H2O2 and the target compound. Fe-TAML/H2O2 does not oxidize bromide to hypobromous acid; however, iodide is oxidized to hypoiodous acid, and as a consequence, the H2O2 consumption is accelerated by a catalytic reaction in iodide-containing water. Overall, Fe-TAML/H2O2 is a rather selective oxidant, which makes it an interesting system for the abatement of electron-rich phenolic-type pollutants. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/33587632/Enhanced_Treatment_of_Municipal_Wastewater_Effluents_by_Fe_TAML/H2O2:_Efficiency_of_Micropollutant_Abatement_ DB - PRIME DP - Unbound Medicine ER -