Spectrophotometric and conductometric study of the interaction of saponin with chromium(VI) and lead(II)

  • S. K. UpadhyayEmail author
  • O. Hari
Original Paper


The removal of heavy metals from contaminated soil/water by biosurfactants depends on the ability of biosurfactant to form complexes with metals. The interaction of quillaja saponin, a nonionic natural biosurfactant, with heavy metal ions, viz. chromium(VI) and lead(II), has been studied spectrophotometrically and conductometrically in order to obtain detailed information for the saponin–metal complexes. Both the methods indicate complex formation between saponin and metal ions. Critical micelle concentration of saponin in the absence and presence of metal ions obtained by both the methods was in good agreement. The thermodynamic parameters, viz. free energy, enthalpy and entropy change, for micellization have been determined.


Saponin Chromium(VI) Lead(II) Biosurfactant complexes 



The authors are thankful to Prof. Rachna Asthana, Director, AITH, Kanpur, for her keen interest and providing necessary facilities for the work.


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Copyright information

© Islamic Azad University (IAU) 2019

Authors and Affiliations

  1. 1.Department of Applied ScienceDr. Ambedkar Institute of Technology for Handicapped UPKanpurIndia

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