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

Diaz, Mayri A.; Ranson, Isora Urdaneta de; Dorta, Blas; Banat, Ibrahim M.; Blázquez, M.L.; González, F.; Muñoz, J.A.; Ballester, A.

doi:10.1080/15320383.2014.907239

Cited by 50 publications

(17 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Metal ions can be removed from soil surfaces also by the biosurfactant micelles. The polar head groups of micelles can bind metals which mobilize the metals in water (Diaz et al 2015). The superior isolate BS37 showed the highest biosurfactant production and exhibited the greatest heavy metal removal efficiency which was identified according to the morphological and biochemical characterization of colony, and its antibiotic susceptibility were tested.…”

Section: Discussionmentioning

confidence: 99%

Bacterial biosurfactant from Citrobacter freundii MG812314.1 as a bioremoval tool of heavy metals from wastewater

Gomaa

El-Meihy

2019

Bull Natl Res Cent

View full text Add to dashboard Cite

Background: The problem of heavy metal contamination is a global issue, and the challenge is to develop methods to remove heavy metals from soil and water. Recently, biosurfactants are one of the compounds that provide an attractive eco-friendly alternative to the physicochemical process in alleviating the heavy metals. Results: Sixty bacterial isolates were isolated from Al-Rahawy drain sediments and screened for biosurfactant production. Only 10 isolates were recoded as biosurfactant producers by the oil spreading and emulsifying assays in addition to the ability of biosurfactant on heavy metal removal in wastewater. The most potent isolate was identified using morphological, cultural, biochemical characteristics, antibiotics susceptibility, and 16 s rRNA technique as Citrobacter freundii MG812314.1. Conclusions: The produced biosurfactant was found to be more effective in removing heavy metals from wastewater, viz 80, 67, 66, 55, 45, 44, and 41% of aluminum, lead, zinc, cadmium, iron, copper, and manganese, respectively, under two inoculum potentials and two contact time. The interaction of heavy metals with biosurfactant was monitored using scanning electron microscope (SEM), energy dispersive X-ray spectra (EDX), and Fourier-transform infrared spectroscopy (FTIR) analyses.

show abstract

Section: Discussionmentioning

confidence: 99%

Bacterial biosurfactant from Citrobacter freundii MG812314.1 as a bioremoval tool of heavy metals from wastewater

Gomaa

El-Meihy

2019

Bull Natl Res Cent

View full text Add to dashboard Cite

show abstract

“…On the other hand, microorganisms in soil also have great effects on metal forms because of their ability to synthesize metabolites such as siderophores, bio-surfactants and organic acids [45]. Bacterial siderophores are able to bind metals and hence increasing metal bioavailability in the rhizosphere of plants [46], bio-surfactants produced by some microorganisms are capable of modifying the surface of various metals and favoring the metal separation from contaminated environments [47]. Moreover, Sheng et al [48] demonstrated the bio-surfactant-producing bacterial strain Bacillus sp.…”

Section: Total Metal In Mushroom and Metal Speciation In Soilmentioning

confidence: 99%

Bioremediation of soils co-contaminated with heavy metals and 2,4,5-trichlorophenol by fruiting body of Clitocybe maxima

Liu

Guo

Jiao

et al. 2015

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Unfortunately, the relatively high cost or the manner of production of biosurfactants still limits their widespread use. Although saponin (SAP) and rhamnolipids (RAM) are the two biosurfactants that have been tested most often, these substances have been tested separately with different soils or matrices. The efficiency of removal of metals from soil with biosurfactants such as these predominately depends on soil properties (e.g., soil texture, structure, clay content, cation exchange capacity, etc.).…”

Section: Introductionmentioning

confidence: 99%

Saponin Versus Rhamnolipids for Remediation of Cd Contaminated Soils

Gusiatin

Radziemska

2018

CLEAN Soil Air Water

View full text Add to dashboard Cite

Cadmium should be effectively removed from soil because it is one of the most toxic soil pollutants. Thus, the present study compared a plant (saponin, SAP) and a microbial (rhamnolipids, RAM) biosurfactant for Cd removal from three different types of soil. Batch washing was tested under different operational conditions: Biosurfactant concentration, 0.1–10% SAP, 0.01–1% RAM; washing time, 0.1–6 h; soil dosage, 12.5–100 g L−1; biosurfactant pH, 2–9 for SAP, 5.5–12 for RAM; washing number, three with SAP, four with RAM. SAP removed Cd from the soils more effectively than RAM because it can be used at a higher concentration and a more acidic pH. Soil washing with SAP also has a shorter equilibrium time (10–90 min.) than washing with RAM (50–300 min), and higher kinetic rate constants (0.23–4.9 kg mg · h−1 for SAP, 0.12–0.25 kg mg · h−1 for RAM). With an increase in soil dosage, Cd removal from all soils decreased significantly with both SAP and RAM. Multiple soil washings improved Cd removal. The predicted optimum number of washes depended on the criteria for soil quality assessment, that is, total Cd concentration, Cd mobility or ecological risk. To meet all of these criteria, SAP needed fewer washes than RAM. SAP is more suitable than RAM for treatment of soils highly contaminated with Cd and containing various amounts of clay.

show abstract

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

Cited by 50 publications

References 26 publications

Bacterial biosurfactant from Citrobacter freundii MG812314.1 as a bioremoval tool of heavy metals from wastewater

Bacterial biosurfactant from Citrobacter freundii MG812314.1 as a bioremoval tool of heavy metals from wastewater

Bioremediation of soils co-contaminated with heavy metals and 2,4,5-trichlorophenol by fruiting body of Clitocybe maxima

Saponin Versus Rhamnolipids for Remediation of Cd Contaminated Soils

Contact Info

Product

Resources

About