基于纳米铁的类Fenton法降解水中的三氯生

 作为一种广泛存在的典型药品及个人护理品，三氯生（TCS）给生态环境和人体健康带来了潜在的威胁。以三氯生为目标污染物，采用实验室自行设计合成的零价纳米铁作为类Fenton试剂，研究了类Fenton法对三氯生的降解过程。单因素实验结果表明，三氯生的去除率随着纳米铁投加量和双氧水浓度的增加而增加；在溶液pH值为3时去除率最高；三氯生的初始浓度对去除率的影响不太明显。动力学分析表明三氯生的降解反应符合二级反应。在相同实验条件下，类Fenton试剂对三氯生的去除率明显优于传统Fenton试剂和单独投加纳米铁的体系。

Removal of triclosan in water with nanoscale zero-valent ironbased Fenton-like system

Triclosan (TCS), a kind of widely used pharmaceuticals and personal care products (PPCPs), poses a significant threat to ecoenvironment and human beings. This paper studies the Fenton-like degradation of TCS with the nanoscale zero-valent iron (nZVI). According to the single-factor experiments, the removal efficiency of TCS is increased with the increase of nZVI dosage and H2O2 concentration. And the removal efficiency reaches the highest when the pH value is 3. However, the initial concentration of the TCS had no obvious effect on the removal, and the results demonstrate that the degradation of the TCS follows the second-order kinetics. In addition, the nZVI-based Fenton-like system can achieve the highest removal efficiency under the same experimental conditions, as compared to the traditional Fenton reagent and nZVI alone.