Bioleaching of heavy metals from contaminated soil using Acidithiobacillus thiooxidans: effect of sulfur/soil ratio

Nareshkumar, R.; Nagendran, R.; Parvathi, K.

doi:10.1007/s11274-007-9639-5

Cited by 34 publications

(17 citation statements)

References 34 publications

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“…Relevant to the work presented here, studies have shown that Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans can remove heavy metals from contaminated soil and sewage systems [23][24][25]. In addition, zinc and copper sorption to At.…”

Section: Introductionmentioning

confidence: 87%

Effects of cell condition, pH, and temperature on lead, zinc, and copper sorption to Acidithiobacillus caldus strain BC13

Aston

Lee

Peyton

2010

Journal of Hazardous Materials

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This study describes the effects of cell condition, pH, and temperature on lead, zinc, and copper sorption to Acidithiobacillus caldus strain BC13 with a Langmuir model. Copper exhibited the highest loading capacity, 4.76 ± 0.28 mmol g(-1), to viable cells at pH 5.5. The highest k(L) (binding-site affinity) observed was 61.2 ± 3.0 L mmol(-1) to dehydrated cells at pH 4.0. The pHs that maximized loading capacities and binding-site affinities were generally between 4.0 and 5.5, where the sum of free-proton and complexed-metal concentrations was near a minimum. Of additional importance, lead, zinc, and copper sorbed to viable cells at pH values as low as 1.5. Previous studies with other acidithiobacilli did not measure viable-cell sorption below pH 4.0. In separate experiments, desorption studies showed that far less copper was recovered from viable cells than any other metal or cell condition, suggesting that uptake may play an important role in copper sorption by At. caldus strain BC13. To reflect an applied system, the sorption of metal mixtures was also studied. In these experiments, lead, zinc, and copper sorption from a tertiary mixture were 40.2 ± 4.3%, 28.7 ± 3.8%, and 91.3 ± 3.0%, respectively, of that sorbed in single-metal systems.

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Section: Introductionmentioning

confidence: 87%

Effects of cell condition, pH, and temperature on lead, zinc, and copper sorption to Acidithiobacillus caldus strain BC13

Aston

Lee

Peyton

2010

Journal of Hazardous Materials

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“…The release of sulfide or the addition of sulfur can give rise to an impulse of activity of sulfur oxidising bacteria which can generate a set of secondary negative effects such as pH drop, release of metals and also of anions such as arsenate (Bayard et al, 2006;Nareshkumar et al, 2008) Yet, the inverse process, i.e. the reduction of sulfate is generally also quite undesirable since it generates toxic sulfides.…”

Section: 4) Sulfide/s 0 Oxidationmentioning

confidence: 99%

Microbial services and their management: Recent progresses in soil bioremediation technology

Guimarães

Arends

et al. 2010

Applied Soil Ecology

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There is an increasing interest in soils and sediments because their vital importance for the survival of the planet has become apparent. They assure a multitude of services such as removal of various gases from the atmosphere (methane, carbon monoxide, ...), filtering of water, removal of pathogens, degradation of organics, recycling of nutrients, ... All these processes represent an economic value, which is estimated to be about the double of the gross annual product. Yet, numerous sites (estimated at more than a quarter million in the EU alone) are polluted and need to be cleaned up. Soil biotechnology plays an ever-increasing role in this. The reason why engineers need to enhance or induce natural processes and the ways they can do this, are reviewed. Furthermore, those soil services which are of vital importance are evaluated. To understand the underlying ecological mechanisms during soil remediation, a pragmatic approach using molecular tools is proposed. Subsequently, a series of new biotechnologies for soils is examined. Also putative new dangers for soils are scouted for. Moreover a set of paradigms currently implemented in the field of soil governance is critically examined. Finally a short list of future market potentials in soil biotech is presented. Overall, it is concluded that soil biotech, driven by the economic value of the services rendered by high quality soils, is currently in a phase of extensive growth.

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“…These organisms received considerable attention because of their ability to solubilize metals from sulfide minerals and their role in the generation of acid mine drainage (e.g., Bosecker 1997;Nordstrom and Southam 1997;Rawlings 2004;Johnson and Hallberg 2005). Representatives of this group of organisms have been used to leach heavy metals from contaminated soil (Gomez and Bosecker 1999;Nareshkumar et al 2008). Sulfur-oxidizers also play an important role in the deterioration of building materials like concrete, limestone, or sandstone (e.g., Krumbein 1968;Milde et al 1983;Sand and Bock 1991;Gaylarde et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Mobilization of Metals from Pristine Mineral Soil by Nitrifying and Sulfur-Oxidizing Bacteria – The Leaching Potential of Indigenous Culture Enrichments

Sonnleitner¹,

Redl²,

Merschak³

et al. 2011

Geomicrobiology Journal

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Indigenous chemolithotrophic nitrifying and sulfur-oxidizing culture enrichments mobilized metals from pristine mineral soil under conditions of ammonium or thiosulfate supplementation in a laboratory experiment carried out over a period of 40 days. The average mineralogical composition of the mineral soil was quartz (62%), feldspar (20%), muscovite (6%), chlorite (2%), hornblende (2%), dolomite (4%), and calcium carbonate (4%). The leaching efficiency of the nitrifying enrichment was calcium (27%), magnesium (15%), zinc (5.4%), manganese (0.6%), and cobalt (1.4%) after 40 days of incubation. In case of sulfur-oxidizing enrichment, leaching efficiency was calcium (56%), magnesium (36%), iron (0.8%), zinc (12%), manganese (2.1%), and cobalt (12%). The impact of these organisms on pristine mineral soil could be important in understanding primary colonization and the early stages of soil formation.

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Bioleaching of heavy metals from contaminated soil using Acidithiobacillus thiooxidans: effect of sulfur/soil ratio

Cited by 34 publications

References 34 publications

Effects of cell condition, pH, and temperature on lead, zinc, and copper sorption to Acidithiobacillus caldus strain BC13

Effects of cell condition, pH, and temperature on lead, zinc, and copper sorption to Acidithiobacillus caldus strain BC13

Microbial services and their management: Recent progresses in soil bioremediation technology

Mobilization of Metals from Pristine Mineral Soil by Nitrifying and Sulfur-Oxidizing Bacteria – The Leaching Potential of Indigenous Culture Enrichments

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