A particle interaction model of reversible organic chemical sorption

Toro, Dominic M. Di

doi:10.1016/0045-6535(85)90008-6

Cited by 171 publications

(85 citation statements)

References 52 publications

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“…Partition coefficients decreased when 5 g of sediment (experiment 5) were used instead of 0.5 g, and more remarkably when using 50 g (experiment 6). There was, therefore, an apparent dependence of the partition coefficients on the water/sediment ratios used, which has been previously reported by other authors performing batch sorption studies (Di Toro, 1985;Westall et al, 1999). Fig.…”

Section: Sorption Of Sas On Marine Sedimentssupporting

confidence: 80%

Reactivity and fate of secondary alkane sulfonates (SAS) in marine sediments

Baena-Nogueras

Rojas-Ojeda

Sanz

et al. 2014

Environmental Pollution

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a b s t r a c tThis research is focused on secondary alkane sulfonates (SAS), anionic surfactants widely used in household applications that access aquatic environments mainly via sewage discharges. We studied their sorption capacity and anaerobic degradation in marine sediments, providing the first data available on this topic. SAS partition coefficients increased towards those homologues having longer alkyl chains (from up to 141 L kg À1 for C 14 to up to 1753 L kg À1 for C 17 ), which were those less susceptible to undergo biodegradation. Overall, SAS removal percentages reached up to 98% after 166 days of incubation using anoxic sediments. The degradation pathway consisted on the formation of sulfocarboxylic acids after an initial fumarate attack of the alkyl chain and successive b-oxidations. This is the first study showing that SAS can be degraded in absence of oxygen, so this new information should be taken into account for future environmental risk assessments on these chemicals.

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Section: Sorption Of Sas On Marine Sedimentssupporting

confidence: 80%

Reactivity and fate of secondary alkane sulfonates (SAS) in marine sediments

Baena-Nogueras

Rojas-Ojeda

Sanz

et al. 2014

Environmental Pollution

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“…Lastly, the dependency of copper partitioning on concentrations of solids was evaluated. This dependence of partition coefficient on concentration of solids has been observed for both organic [15] and inorganic [16] chemicals. Sediment sorption isotherms were obtained at two or three different concentrations of solids for three different sediments.…”

Section: Asbt System Evaluationsmentioning

confidence: 85%

Partitioning of metals to sediment organic carbon

Mahony

Toro

Gonzalez

et al. 1996

Environmental Toxicology and Chemistry

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Abstract-The partition coefficients and sorption capacities for cadmium, copper, and lead in freshwater sediments are derived from fitting a Langmuir isotherm to data from 14 sediments. The metal activity in the solution phase was measured using specific ion electrodes. The metal sorption due to acid-volatile sulfide was subtracted from the total sorbed metal to produce the metal bound to other sediment phases. Organic carbon normalized isotherms provide a reasonable representation of the metal sorption. Partition coefficients and capacities are calculated for pH ϭ 6, 7, and 8 (for Cd). The organic carbon normalized isotherm parameters for the sediments are compared to those reported for soils and sludges. The comparisons for cadmium exhibit differences for which no ready explanations are available. For copper and lead, however, the differences can be attributed to the use of specific ion electrodes for measuring metal activity in the sediment experiments. The cadmium sediment partition coefficients contribute a small increment to the sediment quality criteria. For copper and lead, however, the additional binding to sediment organic carbon is significant and can amount to 1 to 10 and 10 to 100 mol/g dry weight for lead and copper, respectively, depending on the organic carbon concentration of the sediment.

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“…The concentration of chemicals in the suspended particles C SP in mg kg −1 depends on the partition of these between water and suspended particles which can be described by different models described in the literature (Di Toro, 1985;Gobas and MacLean, 2003). Most calculations deploy a partition coefficient that is normalized to the content of organic carbon of the solid particles.…”

Section: Theory and Calculationmentioning

confidence: 99%