硝酸铈改性赤泥制备除磷吸附剂

摘要

用六水硝酸铈改性赤泥并处理含磷废水.实验结果表明:当硝酸铈质量分数为0.45％、焙烧温度为500℃时,制备的吸附剂的吸附性能最好;用该吸附剂处理含磷废水,当初始废水pH为3、振荡时间为80 min时,废水TP去除率约为95％,废水中磷质量浓度为0.41 mg/L,达到GBI8918-2002《城镇污水处理厂污染物排放标准》中的一级标准.该吸附剂的吸附过程符合Langmuir吸附模型.%Red mud was modified with cerium nitrate hexahydrate and used as adsorbent in the treatment of phosphorus-containing wastewater. The experimental results show that; When the mass fraction of cerium nitrate is 0.45% and the calcination temperature is 500℃ , the adsorption capability of the adsorbent is the best; When the initial wastewater pH is 3 and the shaking time is 80 min, the removal rate of TP in the wastewater is about 95%, and the mass concentration of phosphorus in the treated wastewater is 0.41 mg/L, which can meet the first grade discharge standard of GB18918 - 2002. The adsorption process accords with Langmuir adsorption model.