Abstract
The process conditions of making composite particle adsorption material out of hydroxyapatite-chitosan, regeneration method, and how to use composite particle adsorption material to treat industrial sewage containing heavy metals are researched. Experiment consequence shows that when the mass ratio of chitosan to hydroxyapatite is 0.12:1, the concentration of acetic acid is 4%, and liquid-solid ratio is 0.6:1, the granular material will be produced with the best adsorption effect. The dosage of composite particle adsorption material is 0.025 g/mL, the adsorption time is 60 min, and the temperature is 25 °C , removal percentage of Cd2+, Pb2+ and Zn2+ is 99.25%, 75.16% and 79.33% respectively. The isothermal adsorption equation is CCd/Q = 1.323CCd+ 0.1338. Adsorption selective sequence is: Cd2+ > Zn2+ >Pb2+ . When we use 1 mol/L NaCl to regenerate composite particle adsorption material, it still can be employed to deal with sewage with a good effect.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
