Fe（OH）3或Fe2O3多孔微球的制备及对含磷废水的处理

Preparation of Fe（OH）3 or Fe2O3 Porous Microspheres and Treatment of Phosphorus-Containing Wastewater

以开发新型高效除磷吸附剂为目的,利用Fe(OH)3或Fe2O3多孔微球作为吸附剂对模拟含磷废水进行吸附除磷实验,研究Fe3O4与Fe(OH)3或Fe2O3的质量比、铁盐浓度、焙烧温度、吸附剂用量、pH、吸附时间、磷的初始质量浓度、温度等因素对HPO4^2-吸附效果的影响.结果表明:在吸附剂用量为0.8g/L,pH为3,磷的初始质量浓度为2mg/L,吸附时间为150min时,除磷效果最好,磷去除率达98%以上;Langmuir等温方程能更好地描述吸附剂对HPO4^2-的吸附平衡,最大吸附量为9.49mg/g,且随着温度的升高最大单层吸附容量也随着升高,表明此反应为吸热反应.

In order to develop a new efficient phosphorus removal adsorbent,Fe(OH)3 or Fe2O3 porous microspheres were used as adsorbents to remove phosphorus from simulated phosphorus containting wastewater.The effects of mass ratio of Fe3O4 to Fe(OH)3 or Fe2O3,iron salt concentration,calcination temperature,adsorbent dosage,pH value,adsorption time,initial phosphorus concentration and temperature on the adsorption of HPO 4^2- were studied.The results showed that the phosphorus removal effect was the best when the dosage of the adsorbent was 0.8 g/L,pH was 3,initial phosphorus concentration was 2 mg/L,and adsorption time was 150 minutes.The phosphorus removal rate was over 98%.Langmuir isotherm equation can better describe the isotherm adsorption effect of adsorbent on HPO4^2-.The maximum adsorption capacity was 9.49 mg/g,and the maximum single layer adsorption capacity increased with the increase of temperature,indicating that the reaction was endothermic reaction.