纳米铁、纳米铁-铜对水体中芴的去除

摘要

Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants (POPs) that are difficult to degrade, carcinogenic, teratogenic, mutagenic and readily accumulate in organisms.The effect of four factors on the removal efficiency of fluorene was studied by changing the addition amount, initial concentration, pH and temperature of nano-iron and nano-Fe-Cu.The results showed that the removal rate of fluorene increased with the increase of the addition amount, the removal rate of fluorene decreased and the equilibrium adsorption capacity increased with the increase of initial concentration.The lower the pH, the higher the temperature, the higher the removal rate of fluorene;the adsorption process of Fe and Fe-Cu pairs of fluorene is in good agreement with the quasi-second order rate equation.The equilibrium adsorption capacity increases with the initial concentration of fluorene.%多环芳烃(PAHs)是一类难降解、致癌、致畸、致突变,且易在生物体内富集的持久性有机污染物(POPs).选取多环芳烃中芴作为研究对象,通过改变纳米铁和纳米铁-铜添加量、初始浓度、pH和温度,研究四种因素对芴去除效率的影响.实验结果表明:随着加量的增加,芴的去除率升高;增加初始浓度,芴的去除率降低,平衡吸附量增大;pH越低、温度越高,芴的去除率升高;纳米铁和纳米铁-铜对芴的吸附过程较好地符合准二级速率方程,平衡吸附量随芴初始浓度的增大而增大.