Desorption process and morphological analysis of real polycyclic aromatic hydrocarbons contaminated soil by the heterogemini surfactant and its mixed systems

Wei, Wei; Ran, Zongxin; He, Huan; Zhou, Ke; Huangfu, Zhuoxi; Yu, Jiang

doi:10.1016/j.chemosphere.2020.126854

Cited by 18 publications

(9 citation statements)

References 57 publications

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“…There are some similar studies, which are consistent with the results of this study. The surfactant mixtures of tetradecyldimethylammonium bromid and sorbitan monolaurate exhibited better desorption for polycyclic aromatic hydrocarbons contaminated soil [ 42 ]. The mixed surfactant of sodium laurate and tween 80 could enhanced water solubilization of polycyclic aromatic hydrocarbons and improve the desorption of naphthalene and phenanthrene from solid matrices [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Synergistic Solubilization of Phenanthrene by Mixed Micelles Composed of Biosurfactants and a Conventional Non-Ionic Surfactant

Liu

Wang

2020

Molecules

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This study investigated the solubilization capabilities of rhamnolipids biosurfactant and synthetic surfactant mixtures for the application of a mixed surfactant in surfactant-enhanced remediation. The mass ratios between Triton X-100 and rhamnolipids were set at 1:0, 9:1, 3:1, 1:1, 1:3, and 0:1. The ideal critical micelle concentration values of the Triton X-100/rhamnolipids mixture system were higher than that of the theoretical predicted value suggesting the existence of interactions between the two surfactants. Solubilization capabilities were quantified in term of weight solubilization ratio and micellar-water partition coefficient. The highest value of the weight solubilization ratio was detected in the treatment where only Triton X-100 was used. This ratio decreased with the increase in the mass of rhamnolipids in the mixed surfactant systems. The parameters of the interaction between surfactants and the micellar mole fraction in the mixed system have been determined. The factors that influence phenanthrene solubilization, such as pH, ionic strength, and acetic acid concentration have been discussed in the paper. The aqueous solubility of phenanthrene increased linearly with the total surfactant concentration in all treatments. The mixed rhamnolipids and synthetic surfactants showed synergistic behavior and enhanced the solubilization capabilities of the mixture, which would extend the rhamnolipids application.

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Section: Resultsmentioning

confidence: 99%

Synergistic Solubilization of Phenanthrene by Mixed Micelles Composed of Biosurfactants and a Conventional Non-Ionic Surfactant

Liu

Wang

2020

Molecules

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“…43 The K m value is used for the quantitative analysis of the partition coefficient of PAHs in the micelle−water phase of surfactants. 44 A larger value of K ow indicates PAHs accessing the interior of the micelle easily. 45 The log K ow and S* values of naphthalene, phenanthrene, and benzo[a]pyrene were 3.36/ 4.57/5.91 6 and 31/1.1/0.0038 mg/L, respectively.…”

Section: Solubilizing Properties Of Mes/apg On Benzo-[a]pyrenementioning

confidence: 99%

Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene

Wu,

Liu,

Wang

et al. 2024

Environ. Sci. Technol.

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Benzo[a]pyrene is difficult to remove from soil due to its high octanol/water partition coefficient. The use of mixed surfactants can increase solubility but with the risk of secondary soil contamination, and the compounding mechanism is still unclear. This study introduced a new approach using environmentally friendly fatty acid methyl ester sulfonate (MES) and alkyl polyglucoside (APG) to solubilize benzo[a]pyrene. The best result was obtained when the ratio of MES/APG was 7:1 under 6 g/L total concentration, with an apparent solubility (S w ) of 8.58 mg/L and a molar solubilization ratio (MSR) of 1.31 for benzo[a]pyrene, which is comparable to that of Tween 80 (MSR, 0.95). The mechanism indicates that the hydroxyl groups (−OH) in APG form "O−H•••OSO 2 − " hydrogen bonding with the sulfonic acid group (−SO 3 − ) of MES, which reduces the electrostatic repulsion between MES molecules, thus facilitating the formation of large and stable micelles. Moreover, the strong solubilizing effect on benzo[a]pyrene should be ascribed to the low polarity of ester groups (−COOCH 3 ) in MES. Functional groups capable of forming hydrogen bonds and having low polarity are responsible for the enhanced solubilization of benzo[a]pyrene. This understanding helps choose suitable surfactants for the remediation of PAH-contaminated soils.

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“…4 For this reason, surfactantenhanced remediation (SER) has been proposed as a promising technology to remove PAHs from groundwater. 5 However, remediated wastewater is found to contain PAHs, and surfactants may cause secondary pollution. Generally speaking, methods for separating PAHs from surfactant solutions include pervaporation, 6 organic extraction, 7 air stripping, 8 and precipitation, 9 but the separation process is usually cumbersome and energy-consuming, which hinders the application of surfactants in the remediation of PAHscontaminated groundwater.…”

Section: Introductionmentioning

confidence: 99%

“…Surfactants have been proven effective in enhancing the mobility and water solubility of PAHs, a catalyst for groundwater remediation . For this reason, surfactant-enhanced remediation (SER) has been proposed as a promising technology to remove PAHs from groundwater . However, remediated wastewater is found to contain PAHs, and surfactants may cause secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Surface Properties of Photoresponsive Gemini Surfactants: Implication for Remediating PAHs-Contaminated Groundwater

Han

Dai

Duan

et al. 2023

ACS Appl. Mater. Interfaces

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The efficient utility of surfactants remains a daunting task for groundwater remediation. In this study, we have synthesized a conventional p h o t o r e s p o n s i v e s u r f a c t a n t 4 -[ 4 -[ ( 4 -b u t y l p h e n y l ) a z o ] p h e n o x y ]butyldimethylethylammonium bromide (AzoPB) and a gemini photoresponsive surfactant N 1 ,N 2 -bis [4-[4-[(4-butylphenyl)azo]phenoxy]butyl]-N 1 ,N 2 -tetramethylethane-1,2-diammonium bromide (AzoPBT) for solubilizing PAHs in groundwater. The two surfactants' photosensitivity, surface properties, and solubilization/release ability for phenanthrene (Phe) and acenaphthylene (Ace) were studied in detail. Under UV-light irradiation for 15−20 s, the two surfactants can be converted from trans to cis, while cis-to-trans isomerization can be achieved under visible-light irradiation for 1 min. Compared to AzoPB, AzoPBT exhibited strong surface properties such as lower critical micelle concentration (0.52 mM), surface tension (γ, 28.94 mN•m −1 ), minimum area (A min , 1.72 × 10 −8 nm 2 ), and higher maximum adsorption (Γ max , 96.55 mol•m −2 ). The solubility of Phe and Ace in the AzoPBT aqueous solution (12.84 and 14.27 mg/L) was much higher than that in the AzoPB aqueous solution (7.51 and 8.77 mg/L) and gradually increased as the surfactant concentration increased in both aqueous solutions. Compared to AzoPB, gemini surfactant AzoPBT exhibited stronger solubilization ability. After four cycles of cis−trans isomerization conversion, AzoPBT could still reduce the hydrophobicity of Phe in natural groundwater, although the solubility of Phe decreased slightly. Additionally, the release capacity of AzoPBT was significantly higher than that of AzoPB during the cyclic solubilization-release process. The results indicated that gemini photoresponsive surfactants should be preferable to conventional photoresponsive surfactants for groundwater remediation due to their higher solubilization and release efficiency for Phe in the cyclic solubilization and release process, which can improve repair efficiency, minimize secondary pollution, and reduce remediation costs.

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Desorption process and morphological analysis of real polycyclic aromatic hydrocarbons contaminated soil by the heterogemini surfactant and its mixed systems

Cited by 18 publications

References 57 publications

Synergistic Solubilization of Phenanthrene by Mixed Micelles Composed of Biosurfactants and a Conventional Non-Ionic Surfactant

Synergistic Solubilization of Phenanthrene by Mixed Micelles Composed of Biosurfactants and a Conventional Non-Ionic Surfactant

Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene

Synthesis and Surface Properties of Photoresponsive Gemini Surfactants: Implication for Remediating PAHs-Contaminated Groundwater

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