【摘要】 采用共沉淀法制备了系列铁-镧系合金氧化物并研究其除磷能力。结果表明:以铁、镧摩尔比为0.08的吸附剂除磷能力最强,吸附曲线适合Langmuir等温线方程。该吸附剂的吸附量受pH影响显著,pH在4.0~7.0之间时吸附量较大。进行了抗共存阴离子能力测试,结果表明CO2-3对磷吸附量影响较大,给出了共存阴离子对吸附量的影响顺序。对该吸附剂进行了真空高温再生,再生率最高可达62.27%。更多还原

【Abstract】 A series of iron-lanthanum based alloy oxides were developed by co-precipitation method and their ability to remove phosphate were investigated. Test results indicated that the absorbent achieved the highest absorptional capacity under the iron-lanthanum mole ratio of 0. 08. It was proved that the absorptional curve was confined to Langmuir isotherm equation. The absorptional volume of the absorbent was significantly influenced by pH. The absorptional volume achieved the maxima at the pH range from 4. 0 to 7. 0. The influences of co-existed anions on the absorptional capacity were also studied. The phosphorous absorptional capacity was greatly influenced by the carbonate ion and the influential sequence of the co-existing ions on the absorptional capacity was given. The absorbent was regenerated by a high-temperature vacuum calcining method and the highest regeneration rate was 62. 27%.更多还原