羟基铁柱撑膨润土处理含磷废水的研究

以羟基铁为柱化剂对天然膨润土进行柱撑改性制备了羟基铁柱撑膨润土,研究了其对废水中磷的吸附性能和影响因素。结果表明:羟基铁能够进入到膨润土的层间,使其层间距增大,表面积增加;羟基铁柱撑膨润土对废水中的磷有很好的去除效果,在常温下,当改性膨润土投加量为4 mg/L,溶液pH值为5,反应时间为60 min,处理质量浓度为20 mg/L的含磷废水时,磷的去除率达到93.9%。平衡吸附量与平衡质量浓度之间的关系更好地符合Langmuir等温吸附方程所描述的规律。

Disposal of Phosphorus Wastewater by Hydroxyl Fe Pillared Bentonite

A hydroxyl Fe pillared bentonite was prepared with natural bentonite as raw material and hydroxyl Fe as pillaring agent.Influence factors of modified bentonite on adsorbent capacity of phosphorus in wastewater were studied.Results showed that hydroxyl Fe was intercalated into the layered bentonite,then the interlayer of bentonite and BET surface areas were increased.The hydroxyl Fe pillared bentonite has very good removal efficiency of phosphorus in wastewater.The removal rate of phosphorus from wastewater whose phosphorus concentration was 20mg/L can be up to 93.9%under the conditions of dosage of organic modified bentonite 4g/L,adsorption time 60min,pH value 5.The relationship between adsorbing capacity and equilibrium mass concentration better matches the isothermal adsorption equations of Langmuir.