Surfactant-Enhanced Phytoremediation of Soils Contaminated with Hydrophobic Organic Contaminants: Potential and Assessment

Gao, Yanzheng; Ling, Wanting; Zhu, Lizhong; Zhao, Baowei; Zheng, Qingsong

doi:10.1016/s1002-0160(07)60050-2

Cited by 73 publications

(19 citation statements)

References 52 publications

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“…Low bioavailability is also related to the ageing of the pollutants in the soil (Alexander, 1995;Semple et al, 2003). The addition of a surfactant to a contaminated soil can reduce the interfacial tension thus increasing the mass transfer of the contaminants (Mulligan et al, 2001;Gao et al, 2007;. In this context, several researchers have shown that various surfactants can enhance desorption (Aronstein et al, 1991;MataSandoval et al, 2002;Xu et al, 2006), solubilization (Garon et al, 2002;Prak and Pritchard, 2002;Doong and Lei, 2003), biodegradation of organic compounds (Fava and Di Gioia, 2001;Kim et al, 2001), and removal of heavy metals from soil (Dahrazma and Mulligan, 2007;Rufino et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Biosurfactants are useful tools for the bioremediation of contaminated soil: a review

Bustamante

Duran

Díez

2012

J. Soil Sci. Plant Nutr.

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Bioremediation processes are negatively affected by the low aqueous solubility of some contaminants; therefore their bioavailability may be enhanced by the addition of surfactants. These compounds are organic molecules that can be chemically and biologically produced. Surfactants contain both hydrophilic and hydrophobic groups, therefore reducing surface and interfacial tensions of immiscible fluids and increasing the solubility and sorption of hydrophobic organic and inorganic compounds. This article provides an overview of characteristics of natural and synthetic surfactants and the effects of biosurfactants on solubility, sorption and biodegradation of hydrophobic organic contaminants; as well as the effects of biosurfactants on degrader microorganisms as white-rot fungi. Finally, some examples of application of natural surfactants for bioremediation of contaminated soils are shown. In general, this overview indicates the great potential of biosurfactants on the remediation of contaminated sites.

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Section: Introductionmentioning

confidence: 99%

Biosurfactants are useful tools for the bioremediation of contaminated soil: a review

Bustamante

Duran

Díez

2012

J. Soil Sci. Plant Nutr.

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“…Some studies have demonstrated that the presence of a surfactant may increase extracellular enzyme production in various filamentous fungi, including the white-rot fungi [13,15,22]. Additionally, its application in bioremediation processes may allow for an increase in mass transfer and the availability of hydrophobic organic contaminants [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of soya lecithin on the enzymatic system of the white-rot fungi Anthracophyllum discolor

Bustamante

González-Aravena

Cartes

et al. 2010

J Ind Microbiol Biotechnol

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The present work optimized the initial pH of the medium and the incubation temperature for ligninolytic enzymes produced by the white-rot fungus Anthracophyllum discolor. Additionally, the effect of soya lecithin on mycelial growth and the production of ligninolytic enzymes in static batch cultures were evaluated. The critical micelle concentration of soya lecithin was also studied by conductivity. The effects of the initial pH (3, 4, and 5) and incubation temperature (20, 25, and 30°C) on different enzymatic activities revealed that the optimum conditions to maximize ligninolytic activity were 26°C and pH 5.5 for laccase and manganese peroxidase (MnP) and 30°C and pH 5.5 for manganese-independent peroxidase (MiP). Under these culture conditions, the maximum enzyme production was 10.16, 484.46, and 112.50 U L(-1) for laccase, MnP, and manganese-independent peroxidase MiP, respectively. During the study of the effect of soya lecithin on A. discolor, we found that the increase in soya lecithin concentration from 0 to 10 g L(-1) caused an increase in mycelial growth. On the other hand, in the presence of soya lecithin, A. discolor produced mainly MnP, which reached a maximum concentration of 30.64 ± 4.61 U L(-1) after 25 days of incubation with 1 g L(-1) of the surfactant. The other enzymes were produced but to a lesser extent. The enzymatic activity of A. discolor was decreased when Tween 80 was used as a surfactant. The critical micelle concentration of soya lecithin calculated in our study was 0.61 g L(-1).

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“…The ability of the surfactants to increase desorption, apparent aqueous solubility, and microbial bioavailability of HOCs has been well documented. Recently, it has been shown that addition of surfactants facilitates the uptake of HOCs by plants [10]. In this study, After adding 4% Tween 80, the dissipation of BaP in variously unplanted soils (C 1~C5 ) were 731.84~469.99‰, which were 489.54~347.19‰ higher than those in corresponding soils without surfactants, and in soils with Sudan grass were up to 863.94~609.63‰, which were 139.64~190.16‰ higher than those in corresponding soils without surfactants, respectively.…”

Section: Discussionmentioning

confidence: 99%

Effects of Tween 80 on Degradation of Benzo[f]pyrene in Soils Growing Sudan Grass

Pan¹,

Li²,

YunXiao³

et al. 2017

Proceedings of the 2nd International Conference on Biomedical and Biological Engineering 2017 (BBE 2017)

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Abstract. Phytoremediation is becoming a cost-effective technology for the in-situ clean up of sites polluted with hydrophobic organic contaminants (HOCs). The major factors limiting phytoremediation are the mass transfer, rate of plant uptake, and microbial biodegradation of HOCs. To evaluate the potential of surfactants to enhance phytoremediation for HOC-contaminated sites, the efficacy of Sudan grass, at the absence or presence of polyoxyethylene sorbitan monooleate (Tween 80), on the degradation of benzo[â ]pyrene (BaP) in soils were investigated, and mechanisms of surfactant-enhanced phytoremediation (SEPR) were discussed. Results showed that the presence of Tween 80 enhanced dissipation of BaP at initial contents ranging from 20.24 to 321.42 mg/kg. During the 70-d SEPR-experiments, about 731.84~469.99‰ of BaP was removed from planted soils, only 242.28~122.79‰ degradation of BaP occurred in unplanted ones. With the presence of Tween 80, the dissipation ratios of BaP in planted ones were increased up to 863.94~609.63‰, which was 139.64~ 190.16‰ higher than those in corresponding soils without surfactant. Among all possible pathways, contribution of plant-microbial interactions on dissipation of BaP was the most significant, either at the presence (456.73‰) or absence (515.58‰) of Tween 80, were the primary means of contaminant degradation. Results suggested SEPR may be a feasible way for reinforcing removal of HOCs in contaminated sites.

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Surfactant-Enhanced Phytoremediation of Soils Contaminated with Hydrophobic Organic Contaminants: Potential and Assessment

Cited by 73 publications

References 52 publications

Biosurfactants are useful tools for the bioremediation of contaminated soil: a review

Biosurfactants are useful tools for the bioremediation of contaminated soil: a review

Effect of soya lecithin on the enzymatic system of the white-rot fungi Anthracophyllum discolor

Effects of Tween 80 on Degradation of Benzo[f]pyrene in Soils Growing Sudan Grass

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