Metal Removal from Contaminated Soils Through Bioleaching with Oxidizing Bacteria and Rhamnolipid Biosurfactants

Mayri A. Diaz; Isora Urdaneta de Ranson; Blas Dorta Dorta; Ibrahim Banat; Maria L. Blazquez; Felisa Gonzalez; Jesús A. Muñoz; Antonio Ballester

doi:10.1080/15320383.2014.907239

Metal Removal from Contaminated Soils Through Bioleaching with Oxidizing Bacteria and Rhamnolipid Biosurfactants

Mayri A. Diaz, Isora Urdaneta de Ranson, Blas Dorta Dorta, Ibrahim Banat, Maria L. Blazquez, Felisa Gonzalez, Jesús A. Muñoz, Antonio Ballester

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Abstract

The use of surfactants as a method for solubilisation and removal of heavy metal contaminationfrom soil has been reported before. Biosurfactants produced by some microorganisms are able tomodify the surface of various metals and aggregate on interphases favouring metal separationprocess from contaminated environments. We evaluated the feasibility of enhancing the removalof metal ions from a mineral waste/contaminated soils using alternate cycles of treatment withrhamnolipid biosurfactants and bioleaching with amixed bacterial culture of Acidithiobacillusthiooxidans and Acidithiobacillus ferrooxidans. Bioleaching alone removed 50% Zn and 19%Fe. When rhamnolipids was used at low concentration (0.4 mg/mL) 11% Fe and 25% Zn wereremoved while at 1 mg/mL 19% Fe and 52% Zn removal were achieved. When using a cyclictreatment combining bioleaching and biosurfactants, metal removal reached up to 36% for Feand 63% to 70% for Zn.

Original language	English
Pages (from-to)	16-29
Journal	Soil and Sediment Contamination: An International Journal
Volume	24
Issue number	1
Early online date	21 Oct 2014
DOIs	https://doi.org/10.1080/15320383.2014.907239
Publication status	Published (in print/issue) - Jan 2015

Keywords

Metal removal
bioleaching
soil washing
rhamnolipids
Pseudomonas aeruginosa

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1080/15320383.2014.907239

Published Manuscript metal removalAuthor Accepted Manuscript, 603 KB

Cite this

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title = "Metal Removal from Contaminated Soils Through Bioleaching with Oxidizing Bacteria and Rhamnolipid Biosurfactants",

abstract = "The use of surfactants as a method for solubilisation and removal of heavy metal contaminationfrom soil has been reported before. Biosurfactants produced by some microorganisms are able tomodify the surface of various metals and aggregate on interphases favouring metal separationprocess from contaminated environments. We evaluated the feasibility of enhancing the removalof metal ions from a mineral waste/contaminated soils using alternate cycles of treatment withrhamnolipid biosurfactants and bioleaching with amixed bacterial culture of Acidithiobacillusthiooxidans and Acidithiobacillus ferrooxidans. Bioleaching alone removed 50% Zn and 19%Fe. When rhamnolipids was used at low concentration (0.4 mg/mL) 11% Fe and 25% Zn wereremoved while at 1 mg/mL 19% Fe and 52% Zn removal were achieved. When using a cyclictreatment combining bioleaching and biosurfactants, metal removal reached up to 36% for Feand 63% to 70% for Zn.",

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author = "Diaz, {Mayri A.} and {de Ranson}, {Isora Urdaneta} and Dorta, {Blas Dorta} and Ibrahim Banat and Blazquez, {Maria L.} and Felisa Gonzalez and Mu{\~n}oz, {Jes{\'u}s A.} and Antonio Ballester",

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AU - Diaz, Mayri A.

AU - de Ranson, Isora Urdaneta

AU - Dorta, Blas Dorta

AU - Banat, Ibrahim

AU - Blazquez, Maria L.

AU - Gonzalez, Felisa

AU - Muñoz, Jesús A.

AU - Ballester, Antonio

PY - 2015/1

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AB - The use of surfactants as a method for solubilisation and removal of heavy metal contaminationfrom soil has been reported before. Biosurfactants produced by some microorganisms are able tomodify the surface of various metals and aggregate on interphases favouring metal separationprocess from contaminated environments. We evaluated the feasibility of enhancing the removalof metal ions from a mineral waste/contaminated soils using alternate cycles of treatment withrhamnolipid biosurfactants and bioleaching with amixed bacterial culture of Acidithiobacillusthiooxidans and Acidithiobacillus ferrooxidans. Bioleaching alone removed 50% Zn and 19%Fe. When rhamnolipids was used at low concentration (0.4 mg/mL) 11% Fe and 25% Zn wereremoved while at 1 mg/mL 19% Fe and 52% Zn removal were achieved. When using a cyclictreatment combining bioleaching and biosurfactants, metal removal reached up to 36% for Feand 63% to 70% for Zn.

KW - Metal removal

KW - bioleaching

KW - soil washing

KW - rhamnolipids

KW - Pseudomonas aeruginosa

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JO - Soil and Sediment Contamination: An International Journal

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IS - 1

ER -

Metal Removal from Contaminated Soils Through Bioleaching with Oxidizing Bacteria and Rhamnolipid Biosurfactants

Abstract

Keywords

UN SDGs

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