Reseach on Preparation of Hydroxyapatite/Chitosan Composite Materials and Characteristics of Industrial Sewage Containing-Heavy Metal Treatment

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 C_Cd/Q = 1.323C_Cd + 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.

• Periodical: Advanced Materials Research (Volumes 821-822)
• Pages: 1193-1199
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.821-822.1193
• Online since: September 2013
• Authors: Zhi Liang, Tong Jie Wei, Hu Kun Wang, Xi Kun Liu, Ming Long Hong, Jie Ma
• Keywords: Adsorption, Chitosan, Granulate, Heavy Metals Contained Industrial Sewage, Hydroxyapatite (HA), Regeneration

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