铁基水热炭活化过硫酸盐催化降解三氯生机制

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中图分类号：TQ426；X703 文献标志码：A 文章编号：1672-2043（2025）07-1860-12

doi：10.11654/jaes.2024-0767

Mechanism of iron-based hydrochar in activating persulfate for triclosan catalytic degradation

NIUMengyao1，GUO Chennan²，ZHENG Zhi1 ，SU Han1 ，WANGMeiyan1，SUNBinbin1，WANGFei1*

（1.ScholofEnrgndEviroentalEgieing，HbeiUiversityofchologanjina;.inaNuclerr

Engineering Co.，Ltd.，Hebei Branch，Shijiazhuang O5oooo， China）

Abstract：Giventhelimitedcatalyticegradationactivityofbiocharron-enrichedsudgewastransformedintoiron-basedhdochar usingaone-stephydrothermalmethod.Thisprocess leveragedtheabundantchemicalfunctionalgroupsandvariableredoxpropertiesof irontoenhancetheactivatingabilityofhydrocharforpersulfate（PS）.Thisstudyexaminedtheperformanceandmechanismsbywhich iron-basedhdrocharactivatesPSforthecatalyticdegradationof triclosan（TCS）.Thefidingsindicatedthatwhentheiro-to-carbon mass ratio in the sludge feedstock was 2.34：1 ，thehydrochar exhibited the advantages of the highest specific surface area，richest pore structure，andstrongestFe—O/Si—O—Fepeak intensity.TheoptimalconditionsforthepermonosulfatePMS）oxidationsystemwere found to be iron-to-carbon mass ratio of iron-based hydrochar of 2.34：1 ，iron-based hydrochar dosage of 0.6 g L-1 ，PMS concentration of 1.5 mmol ⋅L-1 ，and pH of 3.8.Under these conditions，the TCS degradation rate reached 91 % ，with a degradation rate constant（ Kobs ）of （0.022 5±0.001 6 min-1 . After four reusability experiments，the Kobs remained at （0.0177±0.0017）min-1 ，demonstrating effective

performanceinrealandsimulatedwaterenvironments.ThedegradationofTCSbytheironbasedsludgehydrocharsystemwaspriarily mediated by a radical mechanism，with asynergistic effect between surface ironand carbon.

Keywords：iron-enriched sludge; iron-based hydrochar; persulfate oxidation; triclosan; degradation

三氯生（TCS）已在世界各地的地表水、沉积物以及污水处理厂中被检测到，其浓度从 ng⋅L-1 级到mgL-1 级不等1，在污泥和生物固体中最高含量可达30mg⋅kg-1/2 。（剩余21059字）