Temperature and sodium chloride effects on the solubility of anthracene in water

Arias-González, Israel; Reza, Joel; Trejo, Arturo

doi:10.1016/j.jct.2010.06.006

Cited by 14 publications

(7 citation statements)

References 75 publications

(144 reference statements)

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“…Based on the present data for the less hydrophobic compounds and the previous data for PDMS that showed a similar salinity effect for all PAHs, we infer that the effect of salinity on the K sr‑w is independent of temperature and hydrophobicity. Temperature-independent behavior is consistent with previous results showing no significant variation with temperature in the effect of salinity on the aqueous solubility of anthracene . In Figure B, the conclusion is illustrated by plotting the increase in log K sr‑w per unit of salinity (g/L), hereafter referred to as the salinity dependency factor, as determined at different temperatures for unbiased systems (i.e., those systems showing a salinity effect according to expectations: an increase in K sr‑w with increasing salinity; see Table S7), as a function of the K ow .…”

Section: Resultssupporting

confidence: 89%

“…Temperature-independent behavior is consistent with previous results showing no significant variation with temperature in the effect of salinity on the aqueous solubility of anthracene. 33 In Figure 3B, the conclusion is illustrated by plotting the increase in logK sr-w per unit of salinity (g/L), hereafter referred to as the salinity dependency factor, as determined at different temperatures for unbiased systems (i.e., those systems showing a salinity effect according to expectations: an increase in K sr-w with increasing salinity; see Table S7), as a function of the K ow . The data in the figure do not reveal any clear trend and, despite the appreciable scatter, suggest a constant value for the dependency factor.…”

Section: Environmental Science and Technologymentioning

confidence: 96%

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Quantifying the Effects of Temperature and Salinity on Partitioning of Hydrophobic Organic Chemicals to Silicone Rubber Passive Samplers

Jonker

Heijden

Kotte³

et al. 2015

Environ. Sci. Technol.

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Nowadays, passive sampling is a widely applied technique to determine freely dissolved aqueous concentrations of hydrophobic organic chemicals (HOCs), such as polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). Crucial to the measurements are sampler-water partition coefficients, which are generally determined in the laboratory under "standard conditions" (in freshwater at 20 °C). Theoretically, however, the coefficients are dependent on environmental conditions, such as temperature and salinity. Yet, there are insufficient experimental data in the scientific literature to prove this for different polymers. Several polymers are already being applied during field monitoring, however, and neglecting any effects may lead to imprecise results. In the present study, we therefore quantified the effects of temperature and salinity on the sampler-water partition coefficients of PAHs and PCBs for silicone rubber, a material used in Dutch passive sampling monitoring campaigns. The results demonstrated a chemical-specific and hydrophobicity-dependent temperature effect, being independent of salinity, and a chemical- and temperature-independent salinity effect. Based on the obtained data, location-specific silicone rubber-water partition coefficients (Ksr-w; adjusted for temperature and salinity) can be calculated. The impact of applying such location-specific values was demonstrated using the Dutch passive sampling field monitoring database, covering ten years of PAH and PCB data for several locations. Adjusting the Ksr-w values resulted in aqueous concentrations that were lowered by a factor of 1.6 on average. The reduction was rather constant because of the manner of sampling (under nonequilibrium conditions and using performance reference compounds) and calculating. When sampling under equilibrium conditions in seawater at temperatures at about freezing, and/or applying different calculation approaches, the adjustment effect can potentially increase up to a factor of about 5-6 for the more hydrophobic PAHs and PCBs. Although this study exclusively focused on silicone rubber, qualitatively the results will also apply to other passive sampling materials.

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Section: Resultssupporting

confidence: 89%

Section: Environmental Science and Technologymentioning

confidence: 96%

Quantifying the Effects of Temperature and Salinity on Partitioning of Hydrophobic Organic Chemicals to Silicone Rubber Passive Samplers

Jonker

Heijden

Kotte³

et al. 2015

Environ. Sci. Technol.

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“…1(a)], R 0 = (370 ± 7) μm. The solution was made according [25,26]. At standard temperature and pressure in 100 g of water, 37.5 g of sodium chloride was diluted in order to achieve a salt-saturated solution at T s = 10…”

Section: Experiments and Methodsmentioning

confidence: 99%

Droplet pattern and condensation gradient around a humidity sink

et al. 2014

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We describe the evolution of a water drop saturated with NaCl and the growth of pure water droplets in a breath figure pattern (BF) condensing around it. This salty drop acts as a humidity sink, inhibiting the BF inside a ring at a distance r = δ from the sink center and slowing down BF growth outside the ring. The initial salty drop is taken either from a salt-saturated solution (type I experiment) or by placing an NaCl crystal on the substrate (type II experiment). The results are similar, provided that the initial time for type II evolution is taken at the end of the crystal dissolution. The evolution of the salty drop radius R is deduced from the establishment of a three-dimensional hyperbolic concentration profile around the salty drop. This profile scales with r/δ. Accounting for the salt concentration decrease with salty drop growth, R is seen to grow as t 5 . In the region r > δ, water droplets nucleate and grow. The rate of evolution of the water droplets at constant r/δ can be used to determine the local water pressure. The corresponding data reasonably agree with a hyperbolic water vapor profile around the salty drop. These results can be applied to the growth of BF patterns to determine whether hyperbolic or linear water vapor profiles apply.

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“…The choice of the water model in this paper was suggested by the results of previous studies, which showed that TIP3P results in T = 298 K are quite similar to the TIP4PEW model. 17 …”

Section: Introductionmentioning

confidence: 99%

“…The choice of the water model in this paper was suggested by the results of previous studies, which showed that TIP3P results in T = 298 K are quite similar to the TIP4PEW model. 17 Jorgensen et al 18 studied the temperature and sodium chloride impact on the solubility of anthracene in water. It was concluded that NaCl has a salting-out effect on the solubility of the studied compound.…”

Section: ■ Introductionmentioning

confidence: 99%

Influence of Temperature and Salt Concentration on the Hydrophobic Interactions of Adamantane and Hexane

et al. 2022

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One of the definitions of hydrophobic interactions is the aggregation of nonpolar particles in a polar solvent, such as water. While this phenomenon appears to be very simple, it is crucial for many complex processes, such as protein folding, to take place. In this work, the hydrophobic association of adamantane and hexane at various temperatures and ionic strengths was studied using molecular dynamics simulations with the AMBER 16.0 program and the GAFF force field. The potentials of mean force of hydrophobic dimer formation, as well as the excess free energy, excess energy, excess entropy, and excess heat capacity corresponding to the formation of the contact minimum, were determined and analyzed. For both systems, the depth of the contact minimum in the potential of mean force was found to increase with both temperature and ionic strength. The excess heat capacity of the association at the contact minimum and T = 298 K was found to be negative and to decrease, while the excess entropy and energy were found to be positive and to increase for both systems, the changes being more pronounced for the hexane dimer. The excess heat capacity is also greater in absolute value for the hexane dimer.

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Temperature and sodium chloride effects on the solubility of anthracene in water

Cited by 14 publications

References 75 publications

Quantifying the Effects of Temperature and Salinity on Partitioning of Hydrophobic Organic Chemicals to Silicone Rubber Passive Samplers

Quantifying the Effects of Temperature and Salinity on Partitioning of Hydrophobic Organic Chemicals to Silicone Rubber Passive Samplers

Droplet pattern and condensation gradient around a humidity sink

Influence of Temperature and Salt Concentration on the Hydrophobic Interactions of Adamantane and Hexane

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