自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 10    No. 4    December 2003

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Removal of lead in wastewater by immobilized
inactivated cells ofRhizopus oligosporus
YU Xia(于 霞), CHAI Li-yuan(柴立元), MIN Xiao-bo(闵小波)

School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

Abstract:A novel technology for lead removal with nonlivingRhizopus oligosporusimmobilized in calcium alginate was studied. The results show that the main influencing factors include pH value and interfering cations. pH value has different effects on biosorption of various heavy metals and lead adsorption can be proceeded by controlling pH value in a range of 2-5; interfering cations especially Cu(Ⅱ) can make the adsorption amount of Pb(Ⅱ) decrease by immobilizedRhizopus oligosporus. Desorption efficiency of different eluants and kinetics were investigated. Citrate acid with concentration of 0.3 mol·L-1 is the best for the elution of Pb(Ⅱ) and desorption rate is over 98% when the reaction equilibrium reaches 3 h. Immobilized biomass keeps high lead biosorption capacity after five cycles of regeneration.

 

Key words: Rhizopus oligosporus; immobilization; biosorption; elution; citrate acid

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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