钾掺杂生物炭催化过硫酸钠降解土壤中酚类污染物：性能与活化机理

打开文本图片集

关键词：钾掺杂生物炭；过硫酸盐；催化；自由基；有机污染土壤 中图分类号：X53 文献标志码：A 文章编号：2095-6819（2025）05-1185-11 doi：10.13254/j.jare.2024.0655

Potassium-doped biochar-catalyzed degradationof phenolic polltantsin soil by sodium persulfate： performance and activationmechanism

LIANG Gaolei1，MU Anyong ²，REN Gengbo 1， WEN Juan3，ZHOU Bin³， JIAO Yongjie³，MA Xiaodong1*

（1.SchoolofEergndEviomentalEngineringHebeiUnivesiyfThologanj3in;.eparntofQality SafetyandEnviroentalrotectio，PetoinaDgangOifeldCoanjin3O80hna;3ianjincadeofotal Sciences，Tianjin 300191，China）

Abstract：Thisstudyfocusedonheaplicatioofdvancedpersulfateoxidationtechologies（S-AOPs）toremediatesoilontaated with phenolic organic compounds. K+- doped biochar was used as a heterogeneous phase catalyst to activate persulfate，facilitating the degradationofphenolicpolutantsinsoil.Experimentalresultsshowedthatthedegradationeficiencyofphenolreached98.8%ata 5%K （20号 doping level，while undoped biochar activated persulfate resulted in only a 16.6 % degradation rate.Additionally， K+- doped biocharactivatedpersufateprovedectiveindegadingoerotaiantssuhs，4-ichloropolandspholAachevingeadatio rates of 92.6% and 95.4% ，respectively.Investigations involving free radical quenching experiments and probe molecular studies revealed that the introduction of K+ significantly enhanced the generation of sulfate radicals （SO ）， hydroxyl radicals （ ⋅⋅ OH），and singlet oxygen （ 1O2 ）.Thisenhancementimprovedtheefectivenessofactivatedpersulfateindegradingphenolicpolltants.Thiswork providesnovel insightsand scientific foundations for utilizing PS-AOPs inremediation of organically contaminated soils.

Keywords ：potassium-doped biochar; persulfate; catalysis; radical; organic-contaminated soil

酚类有机化合物（如苯酚、氯酚）作为常见的化工原料及副产物，广泛应用于制药、石油、涂料、造纸和农用化学品制造等行业，然而，这些化合物在生产、运输和使用过程中常常被释放到环境中，尤其是化工园区及其周边土壤，在某些重污染区域，王壤中酚类化合物的含量可能达到数百甚至数千毫克每千克[-2]。（剩余18390字）