Removal of cadmium ions from a soil component quartz by a rhamnolipid biosurfactant


AŞÇI Y., NURBAŞ M., SAĞ AÇIKEL Y.

23rd International Mineral Processing Congress, IMPC 2006, İstanbul, Turkey, 3 - 08 September 2006, pp.2356-2362 identifier

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.2356-2362
  • Hacettepe University Affiliated: Yes

Abstract

In this study, the removal (desorption) of Cd(II) ions from quartz, a component of soil, by rhamnolipid biosurfactant was investigated. The rhamnolipid biosurfactant used in this study was from the glycolipid group and produced by Pseudomonas aeruginosa. The type of soil plays an important role in the removal of heavy metal ions from soil by rhamnolipid biosurfactant. Soil contains various components such as clay, feldspar, quartz, etc. Optimum pH for the removal of Cd(II) ions by rhamnolipid biosurfactant from quartz was determined as 6.8. 27.8-91.6% of the sorbed Cd(II) by the quartz depending on the concentration of Cd(II) was removed from the quartz by rhamnolipid biosurfactant. The highest Cd(II) desorption efficiency by rhamnolipid biosurfactant from quartz was found to be 91.6 % and it was obtained at pH 6.8, at an initial Cd(II) ion concentration of 0.45 mM (0.31 mmol Cd(II)/kg quartz) and at a rhamnolipid concentration of 25 mM.