沉积物中 PAHs 的零价铁修复

摘要

Zero-valent iron was used to degrade 1 6 polycyclic aromatic hydrocarbons (PAHs )in sediments.Effects of temperature,particle size of zero-valent iron,zero-valent iron dosage were studied by the orthogonal experiment.The laboratory experimental results show that the average removal efficiency could reach 56.95% at a temperature of 25 ℃,a particle size of zero-valent iron 0.15 mm,and a zero-valent iron dosage of 2 g.%采用零价铁还原修复技术,对沉积物中16种多环芳烃(PAHs)进行修复,并通过正交实验考察不同温度、零价铁的粒径和添加质量对修复效果的影响。实验结果表明：当温度为25℃,零价铁的粒径为0。15 mm,零价铁的添加质量为2 g 时,修复效果最好,16种 PAHs的平均去除率为56。95%。