Solubilization of polycyclic aromatic hydrocarbons in micellar nonionic surfactant solutions

Edwards, David A.; Luthy, Richard G.; Liu, Zhongbao

doi:10.1021/es00013a014

Cited by 717 publications

(550 citation statements)

References 9 publications

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“…It suggests that the dominant mechanism of Cd 2+ remediation by Mag-PCMA-T is electrostatic interaction. The slight increase in the removal on acenaphthene indicates that the major removal path for HOCs is via hydrophobic interactions between the confined surfactant micelles and HOCs (Edwards et al, 1991), and electronic forces has less impact. There could be a slight rearrangement of the surfactant micelles with increasing pH, leading to slightly more sorption capacity for HOCs on the hydrophobic surfaces of Triton-X.…”

Section: Effect Of Ph On Simultaneous Removalmentioning

confidence: 99%

Simultaneous removal of PAHs and metal contaminants from water using magnetic nanoparticle adsorbents

Huang

Fulton

Keller

2016

Science of The Total Environment

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• Fast magnetic nanosorbents for simultaneous removal of PAHs and metals • Stable remediation performance across wide pH range (4-9) • High water hardness resistance across wide range of Ca 2 + or Mg 2 + concentration • Low energy use for regeneration of adsorbent and able to reuse multiple times Many industrial wastewaters are contaminated with both heavy metal ions and organic compounds, posing a major threat to public health and the environment. In this study, magnetic nanoparticle adsorbents, namely Mag-PCMA-T, which contain a maghemite core and a silica mesoporous layer that permanently confines surfactant micelles within the mesopores, were synthesized to achieve simultaneous removal of polycyclic aromatic hydrocarbons (PAHs) (1 mg/L) and metal contaminants (1 mg/L). The individual removal efficiency of Cd 2+ and acenaphthene using Mag-PCMA-T was evaluated under a range of initial ion concentrations and adsorbent dosages, as well as the competitive adsorption with Cd 2+ and acenaphthene simultaneously present. The isotherms and kinetics of Cd 2+ and acenaphthene sorption onto Mag-PCMA-T were determined. Mag-PCMA-T removed N85% of the acenaphthene in b30 min, with relatively high sorption capacity (up to 1060 mg/kg). Mag-PCMA-T also exhibited high sorption capacity for Cd 2+ (up to 2250 mg/kg). The simultaneous sorption performance was stable across a wide pH range (4-9) as well as in the presence of competitive metal ions (Ca 2+ and Mg 2+ ) or natural organic matters. The Mag-PCMA-T can be regenerated and reused, providing a sustainable, fast, convenient, and efficient approach for water treatment. b s t r a c t a r t i c l e i n f o© 2016 Published by Elsevier B.V. Contents lists available at ScienceDirectScience of the Total Environment

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Section: Effect Of Ph On Simultaneous Removalmentioning

confidence: 99%

Simultaneous removal of PAHs and metal contaminants from water using magnetic nanoparticle adsorbents

Huang

Fulton

Keller

2016

Science of The Total Environment

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“…Surfactants have been widely used in the enhanced remediation of pollution caused by organic matters and heavy metals (Edwards et al, 1991;Mulligan et al, 2001;Nivas et al, 1996;Tripathi and Brown, 2008;Zhao et al, 2006). Previous studies have shown that surfactants with a concentration higher than 10 CMC (critical micelle concentration) had great potential in eluting arsenic from mine tailings.…”

Section: Mobilization Of Arsenic From Fh and Fh-sand By Surfactantsmentioning

confidence: 99%

Arsenic retention and transport behavior in the presence of typical anionic and nonionic surfactants

Liang

Wang

Peng

2016

Journal of Environmental Sciences

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The massive production and wide use of surfactants have resulted in a large amount of surfactant residuals being discharged into the environment, which could have an impact on arsenic behavior. In the present study, the influence of the anionic surfactant sodium dodecyl benzene sulfonate (SDBS) and nonionic surfactant polyethylene glycol octylphenyl ether (Triton X-100) on arsenic behavior was investigated in batch and column tests. The presence of SDBS and Triton X-100 reduced arsenic retention onto ferrihydrite (FH), enhanced arsenic transport through FH coated sand (FH-sand) columns and promoted arsenic release from the FH surface. With coexisting surfactants in solution, the equilibrium adsorbed amount of arsenic on FH decreased by up to 29.7% and the adsorption rate decreased by up to 52.3%.Pre-coating with surfactants caused a decrease in the adsorbed amount and adsorption rate of arsenic by up to 15.1% and 58.3%, respectively. Because of the adsorption attenuation caused by surfactants, breakthrough of As(V) and As(III) with SDBS in columns packed with FH-sand was 23.8% and 14.3% faster than that in those without SDBS, respectively. In columns packed with SDBS-coated FH-sand, transport of arsenic was enhanced to a greater extent.Breakthrough of As(V) and As(III) was 52.4% and 43.8% faster and the cumulative retention amount was 44.5% and 57.3% less than that in pure FH-sand column systems, respectively.Mobilization of arsenic by surfactants increased with the increase of the initial adsorbed amount of arsenic. The cumulative release amount of As(V) and As(III) from the packed column reached 10.8% and 36.0%, respectively.

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“…MSR is an index often used to evaluate the effectiveness of a surfactant in solubilizing a given solute, and it was obtained in this study by the method of Edwards et al [34]. where S cmc is the apparent solubility of 2,4,6-TCP in moles per liter at the CMC; S mic is the total apparent solubility of 2,4,6-TCP in moles per liter in micellar solutions at a particular surfactant concentration greater than the CMC; and C surf is the surfactant concentration at which S mic is evaluated.…”

Section: Molar Solubilization Ratio (Msr) Of Nadc Nac Sds and B-cdmentioning

confidence: 99%

Solubilization and adsorption behaviors of 2,4,6-trichlorophenol in the presence of surfactants

Zeng

Peng

Liu

et al. 2013

Chemical Engineering Journal

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h i g h l i g h t sThe solubility of 2,4,6-trichlorophenol was enhanced 72 times by sodium deoxycholateat pH 7.5. NaDC demonstrated the best solubilization potential, followed by NaC, SDS and b-CD. The adsorption of 2,4,6-trichlorophenol was almost zero when NaC concentration was above CMC 2 . a r t i c l e i n f o t r a c tThe solubilization of 2,4,6-trichlorophenol (2,4,6-TCP) was studied in the presence of four different surfactants, namely sodium deoxycholate (NaDC), sodium cholate (NaC), sodium lauryl sulfate (SDS) and bcyclodextrin (b-CD). The solubility of 2,4,6-TCP was enhanced a maximum of 72 times especially by NaDC at pH 7.5. In addition, other than great solubilization capacities, NaDC and NaC have the advantages of high biodegradability and biocompatibility as biosurfactants. The adsorption behaviors of 2,4,6-TCP on the surface of soil in the presence of these solubilizers were examined. The results showed that the adsorption isotherms for all studied surfactants matched the Henry adsorption isotherm well. The adsorption mechanisms were explored and the adsorption behaviors of 2,4,6-TCP were affected by different micelle forms of the surfactants based on their critical micelle concentration (CMC). The adsorption process was demonstrated by a redistribution procedure between surfactants in solution and surfactants adsorbed onto the soil surface. In particular, the adsorption of 2,4,6-TCP was almost zero when NaC concentration was above CMC 2 .The results of our study have important implications for soil remediation and non-point source pollution control.

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Solubilization of polycyclic aromatic hydrocarbons in micellar nonionic surfactant solutions

Cited by 717 publications

References 9 publications

Simultaneous removal of PAHs and metal contaminants from water using magnetic nanoparticle adsorbents

Simultaneous removal of PAHs and metal contaminants from water using magnetic nanoparticle adsorbents

Arsenic retention and transport behavior in the presence of typical anionic and nonionic surfactants

Solubilization and adsorption behaviors of 2,4,6-trichlorophenol in the presence of surfactants

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