African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12024

Full Length Research Paper

Adsorption of copper, zinc and lead on biosurfactant produced from cassava wastewater

Larissa Kummer
  • Larissa Kummer
  • Department of Chemistry and Biology, Federal Technological University of Paraná (UTFPR). Rua Deputado Heitor Alencar Furtado, 5000 - 81280-340 Curitiba-PR, Brazil.
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Natássia Jersak Cosmann
  • Natássia Jersak Cosmann
  • Center of Exact and Technological Sciences, Western Paraná State University (UNIOESTE/CASCAVEL/CCET/ PGEAGRI), Rua Universitária, 2069 - 85819-110 Cascavel, PR, Brazil.
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Glaucia Maria Pastore
  • Glaucia Maria Pastore
  • Department of Food Science, Faculty of Food Engineering, State University of Campinas, Rua Monteiro Lobato, 13083-862 Campinas, SP, Brazil.
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Ana Paula Resende Simiqueli
  • Ana Paula Resende Simiqueli
  • Department of Food Science, Faculty of Food Engineering, State University of Campinas, Rua Monteiro Lobato, 13083-862 Campinas, SP, Brazil.
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Vander de Freitas Melo
  • Vander de Freitas Melo
  • Department of Soil Science and Agricultural Engineering, Federal University of Paraná (UFPR), Rua dos Funcionários, 1540 - 80035-050 Curitiba, PR, Brazil.
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Simone Damasceno Gomes
  • Simone Damasceno Gomes
  • Center of Exact and Technological Sciences, Western Paraná State University (UNIOESTE/CASCAVEL/CCET/ PGEAGRI), Rua Universitária, 2069 - 85819-110 Cascavel, PR, Brazil.
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  •  Received: 18 September 2015
  •  Accepted: 01 February 2016
  •  Published: 03 February 2016

Abstract

The remediation of soils contaminated by hydrophobic compounds, especially petroleum derivatives, using surfactants has been fairly studied. The use of these compounds in heavy metal contaminated areas is incipient and their mechanism of action has not been totally elucidated yet. The biosurfactants are compounds with surfactant characteristics produced by living organisms and have several environmental advantages, like greater biodegradability and production from renewable sources. The aim of this study was to evaluate the adsorption potential of the metals copper, zinc and lead onto the biosurfactant structure and to relate it to the Langmuir and Freündlich physicochemical models of adsorption. The biosurfactant produced presented an emulsification index (EI) around 60%, which was stable even after 72 h of emulsion formation. The analysis of FTIR and HPLC confirmed that the biosurfactant produced is composed mainly of surfactin, found in concentration of 28%. The biosurfactant was capable of adsorbing the metals in its structure. In the adsorption process of Pb2+, the biosurfactant was considered as an interesting adsorbent, but this behavior did not adjust satisfactorily to Langmuir and Freündlich models. Thus, the biosurfactant has the potential to be utilized in remediation processes of soils and treatment of effluents contaminated by heavy metals.

 

Key words: Bacillus subtilis, trace elements, heavy metals, remediation of contaminated areas, agro industrial residue, surfactin.