CAJ | 학술논문

采用合成的针铁矿为催化剂与H2 O2构成非均相Fenton试剂，开展对盐酸四环素（ TC）的氧化分解特征及其动力学研究．考察pH、H2 O2浓度、催化剂投加量、TC初始浓度、温度对TC氧化分解过程的影响．结果表明，在优化条件下，针铁矿240 min后对TC的Fenton氧化分解率达到97.2％，主要通过· OH作用，因为加入叔丁醇自由基捕获剂后，TC的氧化分解率明显降低．此外，针铁矿表面催化氧化分解TC是符合准一级动力学反应（ R2＞0.97），其表观活化能为Ea＝31.86 kJ/mol．结果表明该反应比较容易进行，温度升高有助于提高反应速率．
채용합성적침철광위최화제여H2 O2구성비균상Fenton시제，개전대염산사배소（ TC）적양화분해특정급기동역학연구．고찰pH、H2 O2농도、최화제투가량、TC초시농도、온도대TC양화분해과정적영향．결과표명，재우화조건하，침철광240 min후대TC적Fenton양화분해솔체도97.2％，주요통과· OH작용，인위가입숙정순자유기포획제후，TC적양화분해솔명현강저．차외，침철광표면최화양화분해TC시부합준일급동역학반응（ R2＞0.97），기표관활화능위Ea＝31.86 kJ/mol．결과표명해반응비교용역진행，온도승고유조우제고반응속솔．
The oxidative decomposition character and its degradation kinetic model of Tetracycline ( TC) were in-vestigated using goethite/H2 O2 as the heterogeneous Fenton reagent , with emphasis on the evaluation of the several Fenton-like oxidation system parameters , including initial solution pH , concentrations of hydrogen peroxide ( H2 O2 ) and α-FeOOH, initial concentration of TC , and reaction temperature .The results showed that a 97.2%decomposition efficiency for TC was obtained within 240 min under optimum conditions .Moreover, the addition of tertiary butyl alcohol ( used as the · OH quencher ) to the reaction system can cause obviously the decrease of TC decomposition rate, it suggested that the TC decomposition was dominated by · OH.In addition, goethite surfaces catalysed a heterogeneous Fenton-like reaction responsible for the TC decomposition following pseudo-first order ki-netics (R2 >0.97), and their apparent activation energy (Ea) measured was relatively low (31.86 kJ· mol -1), which implied that the ease of the Fenton decomposition reaction occurred generally and thus it is convenient for the actual application .