A comparative study of the adsorption of linear alkyl sulphates and alkylbenzene sulphonates on river sediments

Marchesi, Julian R.; House, William A.; White, Graham F.; Russell, Nicholas J.; Farr, Ian

doi:10.1016/0166-6622(91)80036-n

Cited by 36 publications

(21 citation statements)

References 16 publications

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“…In this paper we have exploited HPLC analysis to quantify individual components in mixtures in order to make adsorption measurements for each homolog. A related approach was used previously to measure adsorption parameters for alkyl chain‐length homologs of linear alkylbenzene sul‐fonate mixtures [24]. The success of the approach depends on the absence of interactions among components.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the fate of NPEO x s will be strongly influenced by the traffic of both surfactant and biodegradative bacteria between the adsorbed and free states. Although the sorption of pure components of anionic surfactants to soil [23] and to riverine sediments [24] has been measured under controlled conditions, little is known about the sorption to sediment for nonionic surfactant molecules. Hitherto the investigation of the adsorption of nonionic surfactants has been based on techniques measuring the sum total of ethoxamers rather than specific quantitation of individual components [25–27].…”

Section: Introductionmentioning

confidence: 99%

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Environmental fate of nonylphenol ethoxylates: Differential adsorption of homologs to components of river sediment

John

House

White

2000

Enviro Toxic and Chemistry

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Nonylphenol ethoxylate (NPEOx) homologs present in commercial mixtures were rapidly adsorbed to and desorbed from native river sediment. Adsorption isotherms, established using high‐performance liquid chromatography analysis to monitor individual homologs NPEO3 to NPEO13 simultaneously, were linear for each component adsorbing to native sediment, organic‐free sediment, and kaolinite, usually with small positive intercepts on the isotherms indicating an additional low‐capacity, high‐affinity binding site. The adsorption partition coefficients (Kd) for the native sediment decreased progressively from 1,460 L/kg for NPEO3 to 450 L/kg for NPEO10, then increased again slightly for higher homologs. In contrast, Kd values for organic‐free sediment (range 230–590 L/kg) or kaolinite (190–490 L/kg) increased steadily from NPEO3 to NPEO13. Adsorptions to silica and alumina were very weak, but to sewage sludge all components adsorbed strongly (Kd values 12,000–33,000, with a maximum at NPEO7). The adsorption to sewage sludge was related to the low‐capacity, high‐affinity sites observed for native sediment. Dependence of Kd values on ethoxylate chain length was analyzed, in terms of both possible adsorption mechanisms, and the environmental fate and impact of NPEOxs as endocrine disruptors.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Environmental fate of nonylphenol ethoxylates: Differential adsorption of homologs to components of river sediment

John

House

White

2000

Enviro Toxic and Chemistry

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“…1, it can be seen that the sorption equilibration time of SDBS in three kinds of media (NSW, DSW and DW) was all approximately 100 min at 25°C which was longer than that reported for SDBS on sediments (<20 min) (Marchesi et al 1991). The sorption of SDBS on marine sediments was a relatively fast process.…”

Section: Sorption Equilibration Timementioning

confidence: 95%

Sorption Behaviors of Sodium Dodecylbenzene Sulfonate (SDBS) on Marine Sediments

Yang

Cao

2008

Water Air Soil Pollut

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The sorption behavior of sodium dodecylbenzene sulfonate (SDBS), an anionic surfactant, on marine sediments was systematically investigated. The experimental results showed that 100 min was required for the adsorption equilibrium. For the sediments treated by HCl and H 2 O, sorption behavior of SDBS was fit with linear isotherm very well over the concentration range studied at 298 K. The sorption occurred primarily due to partition function of hydrophobic chains into organic carbon of sediments. Sorption of SDBS on H 2 O 2 -treated sediments was satisfactorily fit with Freundlich isotherm model and mainly through surface function of clay minerals in the sediment. The sorption was favorably influenced by the increased salinity, deceased pH and decreased temperature of seawater.

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“…The sediment used in these studies (Botany Pond sediment ; BPS) was obtained from an artificial pond (NGR 870867) at the Institute of Freshwater Ecology River Laboratory site, Wareham, Dorset. The batch of sediment designated BPS3 was prepared according to the method of Marchesi et al (1991a). A sediment sample was taken from the top 5 cm of the pond bottom with a mesh net and passed through a 2 mm sieve before being baked overnight at 85 "C in shallow trays.…”

Section: Mineralization Of Radiolabelled Triethylene Glycol Dodecylmentioning

confidence: 99%

Re-evaluation of the hypothesis that biodegradable surfactants stimulate surface attachment of competent bacteria

et al. 1997

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The hypothesis that biodegradable surfactants stimulate the attachment of biodegradation-competent bacteria to surfaces has been re-evaluated using a variant of the surfactant-degrading bacterium Pseudomonas sp. DESl designated Pseudomonas sp. DES2. This variant was identical to the parental strain in terms of its carbon-utilization patterns and alcohol dehydrogenase and alkylsulfatase complements (enzymes involved in surfactant biodegradation), but differed markedly in its growth characteristics when using sodium dodecyl triethoxysulfate or triethylene glycol dodecyl ether as secondary carbon sources. Pseudomonas sp. DESl exhibited diauxie in these surfactant-based culture media in contrast to Pseudomonas sp. DES2, which exhibited single-phase growth. Pseudomonas sp. DES2 did not attach to river sediment in a microcosm system when challenged with a dose of either surfactant, although it did biodegrade the substrate. In contrast, Pseudomonas sp. DESl attached to the river sediment whilst biodegrading the test substrate. It is concluded that the ether-scission system, which is responsible for primary biodegradation of both substrates, is deregulated in Pseudomonas sp. DES2 in contrast to that in Pseudomonas sp. DESI, and that, contrary to a previous hypothesis, biodegradable surfactants do not necessarily stimulate the attachment of biodegradation-competent bacteria during their biodegradation.

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A comparative study of the adsorption of linear alkyl sulphates and alkylbenzene sulphonates on river sediments

Cited by 36 publications

References 16 publications

Environmental fate of nonylphenol ethoxylates: Differential adsorption of homologs to components of river sediment

Environmental fate of nonylphenol ethoxylates: Differential adsorption of homologs to components of river sediment

Sorption Behaviors of Sodium Dodecylbenzene Sulfonate (SDBS) on Marine Sediments

Re-evaluation of the hypothesis that biodegradable surfactants stimulate surface attachment of competent bacteria

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