Solubility enhancement of dioxins and PCBs by surfactant monomers and micelles quantified with polymer depletion techniques

Schacht, Veronika J.; Grant, Sharon; Escher, Beate I.; Hawker, Darryl William; Gaus, Caroline

doi:10.1016/j.chemosphere.2016.02.122

Cited by 21 publications

(21 citation statements)

References 33 publications

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“…Furthermore, it is worth noting that pretreatment for the spiked sample to inhibit the growth of bacteria or microorganism should be done to prevent the biodegradation of the spiked compounds during the incubation period. NaN 3 solution is commonly used in this application [4,30,33,34].…”

Section: The Conditions Of Nd-spmementioning

confidence: 99%

“…In literatures, the sorption coefficients of a variety of organic contaminants to binding matrixes including commercial humic acid [25,58,65], surfactant [4], protein [17,57], liposome [54], and DOM from pore water/wastewater [18,30,31,34,55,56,64] have been investigated and determined. Sorption coefficients of suspended particles including the C60 [29], latex [66], and particles with different sizes separated from sediment [55] were also measured with similar procedure described above.…”

Section: Determination Of Sorption Coefficient Using Nd-spmementioning

confidence: 99%

“…Several studies have showed that the DOM increases the solubility [4], decreases the volatilization [5], and also affects the bioavailability and toxicity of the OCs [6,7], as well as controls the leaching of pesticides in soil [8][9][10][11]. In addition, the presence of DOM enhances the photodegradation of pollutants through the production of reactive species such as hydroxyl radical or singlet oxygen [12], and inhibits the degradation of pesticides [13,14].…”

Section: Introductionmentioning

confidence: 98%

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Solid Phase Microextraction for Sensing Freely Dissolved Analytes in Complex Water Sample

Jiang¹,

Xu²,

Ouyang³

2016

Solid Phase Microextraction

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Ever since its invention, solid phase microextraction (SPME) has been widely used for aqueous sampling. In recent years, this technique has received increasing attention for the analysis of complex water sample because of its capability of sensing freely dissolved analytes in the complex matrix. In this chapter, the development of negligible depletion SPME (nd-SPME) for the determination of freely dissolved analytes in complex water samples is reviewed. The fundamentals and sampling conditions of nd-SPME are first discussed. Then, the application of nd-SPME for measurement of sorption coefficients in complex matrixes is summarized. In addition, the calibration methods of nd-SPME are discussed in detail, especially the effect of complex matrix on the sampling kinetic. For the first time, the advances of complex matrix effects including retarded and enhanced effects on the SPME sampling kinetic are fully explored.

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Section: The Conditions Of Nd-spmementioning

confidence: 99%

Section: Determination Of Sorption Coefficient Using Nd-spmementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Solid Phase Microextraction for Sensing Freely Dissolved Analytes in Complex Water Sample

Jiang¹,

Xu²,

Ouyang³

2016

Solid Phase Microextraction

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“…In this manner, an organic contaminant's apparent aqueous solubility can be increased in the presence of surfactant micelles and facilitated transport of organic contaminants in the subsurface environment can occur (Pennell et al, 2003;Paria, 2008;Grant et al, 2011). The more hydrophobic (and typically least mobile) contaminants have greater apparent aqueous solubility factor increases due to solubilisation by surfactant micelles, and therefore have the highest surfactant-facilitated transport (SFT) potential (Schacht et al, 2016). This contaminant group includes persistent, bioaccumulative and toxic super-hydrophobic organic contaminants (SHOCs; log K OW > 6) such as congeners of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated biphenyls (PCBs).…”

Section: Introductionmentioning

confidence: 99%

Transport potential of super-hydrophobic organic contaminants in anionic-nonionic surfactant mixture micelles

et al. 2019

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Surfactant mixtures are commonly used in agricultural and soil remediation applications, necessitating an understanding of their micellization behaviour and associated impact on the fate of co-existing chemicals in the subsurface. A polymer-water sorption isotherm approach was shown to present an alternative to traditional methods for quantifying, understanding and predicting surfactant mixture properties. Micelle compositions were measured for anionic-nonionic surfactant mixtures. This is important since micelle composition can alter the apparent aqueous solubility of super-hydrophobic organic contaminants (SHOCs) resulting in surfactant facilitated transport (SFT). A key parameter in predicting SFT for SHOCs is their micelle-water partition constant (K MI ). These were determined for polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated biphenyls (PCBs) with representative anionic-nonionic surfactant mixtures using a polymer depletion method. These previously unreported constants were intermediate between those for pure anionic and nonionic surfactant solutions, with magnitude depending on micelle composition. Separate linear relationships were found between log K MI and log K OW for PCDDs and PCBs. This work provides new methods and preliminary results relating to binary surfactant mixtures (e.g. critical micelle concentration and micelle composition) and SHOCs (K MI ) that are important in the evaluation of the fate and transport of SHOCs in the subsurface environment and provide insight into the environmental mobility of these important contaminants.

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“…Thus, lecithin becomes an amphipathic biosurfactant, and also a good candidate of primary substrate during the reductive dechlorination of PCDF. Lecithin could enhance the bioaffinity and bioavailability of contaminant to bacteria after injection, and thus, the contaminant biodegradation rate could be enhanced (Paria, 2008;Schacht et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Ocdf-Contaminated Soils by Novel Bacterial Strain

Jing

Chen²,

Sung

et al. 2017

Appl Ecol Env Res

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Abstract. In this study, effectiveness of using Pseudomonas mendocina NSYSU (P. mendocina NSYSU) on the bioremediation of octachlorinated dibenzofuran (OCDF)-polluted soils was evaluated through microcosm experiments and gene analys is under anaerobic conditions. The major tasks were to investigate the (1) feasibility of enhancing anaerobic OCDF dechlorination by P. mendocina NSYSU and lecithin, and (2) functional genes for the anaerobic biodegradation of OCDF. Results show that P. mendocina NSYSU was able to degrade OCDF through the anaerobic dechlorinating mechanisms. Results show that lecithin was used as the carbon source and OCDF desorption additive during the dechlorination of OCDF. Lecithin supplement could enhance the biodegradation rate of OCDF. Up to 68 and 61% of OCDF was removed after a 64-day operation with lecithin and nutrient broth supplement, respectively. Results indicate that primary substrate supplement is required for the enhancement of reductive dechlorination of OCDF. Five functional genes encoding the hydrolase in P. mendocina NSYSU were identified. The detected specific genes played important roles in OCDF dechlorination. Results reveal that a bioremediation system using P. mendocina NSYSU as the inocula would be a cost-effective and acceptable remedial system to remediate furan-polluted soils.

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Solubility enhancement of dioxins and PCBs by surfactant monomers and micelles quantified with polymer depletion techniques

Cited by 21 publications

References 33 publications

Solid Phase Microextraction for Sensing Freely Dissolved Analytes in Complex Water Sample

Solid Phase Microextraction for Sensing Freely Dissolved Analytes in Complex Water Sample

Transport potential of super-hydrophobic organic contaminants in anionic-nonionic surfactant mixture micelles

Bioremediation of Ocdf-Contaminated Soils by Novel Bacterial Strain

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