纳米氧化锰的低氧压法制备及其对磷的吸附性能

Preparation of manganese oxide nanoparticles synthesised using a low-oxygen pressure method and its phosphorus absorption performance

设计了一种基于工业连轧生产线的低氧压法,通过控制含锰冷轧板的气氛露点制备了纳米氧化锰磷吸附剂,并研究了吸附剂的吸附性能.结果表明:纳米氧化锰磷吸附剂具有很好的热稳定性,最佳吸附时间为24 h,最佳投加量为3.6 g/L,且在强酸环境下有着非常优秀的吸附性能;试验所得数据与准二级动力学模型和L angmuir等温吸附模型拟合良好,在温度为30℃,pH值为1.5的环境下其最大吸附能力约为8.3 mg/g.

A low-oxygen pressure method was proposed based on an industrial continuous rolling production line.Using this method,a manganese oxide nanoparticle phosphorus adsorbent was prepared by controlling the dew point of manganese-containing cold-rolled sheets.The adsorption performance of the adsorbent was assessed.Results showed that the adsorbent exhibited good thermal stability.Its optimal adsorption time was 24 h,and the best adsorbent dosage was 3.6 g/L.A test was also conducted.It was proved that the adsorbent had excellent performance in strongly acidic environments.The data obtained from the test were fitted to the quasi-second-order kinetic and Langmuir isotherm adsorption models.The maximum adsorption capacity was found to be 8.3 mg/g at a temperature of 30℃and pH value of 1.5.