超声-NaOH改性粉煤灰吸附水中Cu^(2+)的研究

Study on Adsorption of Cu^(2+) in Water by Ultrasonic -NaOH Modified Fly Ash

粉煤灰有大量活性位点,利用超声-NaOH对其改性。用改性剂浓度、超声时间、吸附时间、吸附用量和PH进行变量实验,探究改性粉煤灰吸附Cu^(2+)的最佳条件,结果表明:NaOH浓度5.0 mol/L、超声时间60 min、吸附剂量为3 g,PH=11、搅拌时间为20 min时对Cu^(2+)的吸附率达到99.5%,比未改性粉煤灰增加34%。

Fly ash contains a large number of active sites,and it is modified by ultrasound-NaOH.Variable experiments were carried out with modifier concentration,ultrasonic time,adsorption stirring time,adsorption dosage and PH to explore the best conditions for adsorption of Cu^(2+)by modified fly ash.The results showed that the adsorption rate of Cu^(2+)reached 99.5%when NaOH concentration was 5.0 mol/L,ultrasonic time was 60 min,adsorption dosage was 3 g,PH=11,and stirring time was 20 min,which was 34%higher than that of unmodified fly ash.