铁镍改性膨润土对废水中有机污染物的吸附性能研究

以钠基膨润土为原料,制备了铁镍无机改性土和铁镍有机复合改性土,并应用于造纸废水的处理,探讨了改性土用量、废水pH值、搅拌时间等因素对COD去除率的影响,通过正交实验对实验条件进行了优化.结果表明:铁镍有机复合改性土和铁镍元机改性土对废水的处理效果明显好于原土;膨润土的用量、废水的pH对COD的去除率影响较大;对于铁镍无机改性土,吸附剂用量为12g/L,溶液pH=2,吸附时间为10 min时,对废水中COD的去除率为54.06%;对于铁镍有机复合改性土,吸附剂用量为14g/L,溶液pH=3,吸附时间为20 min时,对废水中COD的去除率为70.10%.

Study on Fe-Ni modified montmorillonite removing COD in wastewater

A series of modified montmorillonites were synthesized from Na-montmorillonite,which include Fe-Ni-inorganic montmorillonite and Fe-Ni-ino-organic montmorillonite.The experimental conditions were optimized with the orthogonal experiment considering the effects of dosage,pH and stirring time on of COD removal rate.The results show that the removal rates of Fe-Ni-inorganic montmorillonite and Fe-Ni-ino-organic montmorillonite are higher than the original montmorillonite.The COD removal rate is 54.06% for Fe-Ni-inorganic montmorillonite under the conditions of dosage=12 g/L,pH=2 and stirring time=10 min.The COD removal rate is 70.10% for Fe-Ni-ino-organic montmorillonite under the conditions of dosage=14 g/L,pH=3 and stirring time=20 min.