Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2012, Vol. 28 ›› Issue (32): 31-34.

Special Issue: 畜牧兽医

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Adsorption and Desorption on Cu, Zn by Duck Manure

  

  • Received:2012-03-11 Revised:2012-05-10 Online:2012-11-15 Published:2012-11-15

Abstract:

To investigate the activity of the heavy mental in manure of livestock and poultry, the adsorption/desorption processes of Cu2+ and Zn2+ by duck manure were studied. All adsorption thermodynamics processes reached equilibrium within 24 hours with the maximum adsorption capacity being 1245.35 mg/kg (Cu2+), 1129.34 mg/kg (Zn2+) respectively. The adsorption processes of both ions by duck manure fitted well with the Langmuir adsorption mode instead of Freundlich mode. Furthermore, the absorption of Cu2+ followed second-order kinetic law, while that of Zn2+ agreed with the first-order law. The desorption processes of Cu2+ and Zn2+ demonstrated that, desorption capacity was limited and the reaction could reach equilibrium within a rather short time.