CRCU

Chemical Research in Chinese Universities ›› 2005, Vol. 21 ›› Issue (6): 654-657.

• Articles • Previous Articles     Next Articles

Preliminary Research on Cd2+ Removal from Wastewater by Sphaerotilus Natans

QIN Yu-chun1,2, GUAN Xiao-hui1,2, YIN Rong3, WANG Li-wen2, WEI De-zhou1   

  1. 1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, P. R. China;
    2. Department of Applied Chemistry, Northeast Institute of Electric Power Engineering, Jilin 132012, P. R. China;
    3. Department of Common Courses, Beihua University, Jilin 132011, P. R. China
  • Received:2004-12-27 Online:2005-11-23 Published:2011-08-06
  • Supported by:

    Supported by Developing Project of Jilin Province Science and Techenology(No.20050505)

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Abstract: Influencing factors, such as the biomass concentration, pH value, tem perature and time of adsorption on the removal of Cd2+ were investigated when Sphaerotilus natans was used as a biosorbent.The results show that Sphaerotilus natans has a significant effect on the adsorption of Cd2+.The process of adsorption will reach the equilibrium in 20 min.Temperature has no significant effect on the adsorption.The removal rate of Cd2+ can approach to 90% under the conditions of pH 5.5, the biomass mass concentration 0.6 g/L and the initial mass concentration of cadmium ≤20 mg/L.The maximum specific uptake is 1.9 mmol/g dry biomass .The adsorption was fitted with the Freundlich isotherm adsorption equation when the concentration of Cd2+ is in a range of 0-100 mg/L.HCl and EDTA can desorb Cd2+ from biomass effectively.

Key words: Sphaerotilus natans, Cadmium ion, Adsorption character, Influencing factor