Henry's law constants for a diverse set of organic chemicals: Experimental determination and comparison of estimation methods

Altschuh, Joachim; Brüggemann, Rainer; Santl, Helmut; Eichinger, Gerhard; Piringer, O.

doi:10.1016/s0045-6535(99)00082-x

Cited by 117 publications

(67 citation statements)

References 35 publications

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“…The initial aqueous concentrations were set to 15% of the solubility of p,p 0 -DDT that has the lowest water solubility among the 17 compounds. OCPs were prepared in 1 mL methanol and spiked into the water in the reactor to obtain concentrations (800 ng L À1 ) less than 15% of the solubility of p,p 0 -DDT (0.0055 mg L À1 ) (Altschuh et al, 1999). Initial aqueous concentrations were between 0.01% (g-HCH) and 15% (p,p 0 -DDT) of the solubilities of OCPs.…”

Section: Gas-stripping Experimentsmentioning

confidence: 99%

“…Several studies have reported physical-chemical properties of OCPs in the literature. However, the studies on Henry's law constants (H) of OCPs are very scarce (Jantunen and Bidleman 2006;Sahsuvar et al, 2003;Jantunen and Bidleman, 2000;Rice et al, 1997;Kucklick et al, 1991), and most of them are estimated or determined only at a single temperature (Altschuh et al, 1999). Organic compounds are generally less soluble in saline water (seawater) than in pure water, therefore, the presence of dissolved inorganic salts has a significant effect on H values (Schwarzenbach et al, 2003;Staudinger and Roberts, 2001;Xie et al, 1997;Rice et al, 1997;Kucklick et al, 1991;Gossett, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature

Çetin

Özer

Sofuoğlu

et al. 2006

Atmospheric Environment

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The Henry's law constant (H) is an important parameter that is required to estimate the air-water exchange of semivolatile organic compounds. Henry's law constants for 17 banned/restricted/currently used organochlorine pesticides (OCPs) were experimentally determined using a gas-stripping technique in deionized and saline water (3%) over a temperature range of 5-35 1C. H values (at 25 1C) ranged between 0.06670.037 Pa m 3 mol À1 (endosulfan II) and 62.0724.2 Pa m 3 mol À1 (heptachlor) in deionized water while the range in saline water was 0.2870.03 Pa m 3 mol À1 (g-HCH) and 135.2731.3 Pa m 3 mol À1 (heptachlor). The increase in dimensionless Henry's law constants (H 0 ) for OCPs over the studied temperature range was between 3 (g-HCH)-19 times (chlorpyrifos) and 3 (endosulfan II)-80 times (transnonachlor) in deionized and saline water, respectively. The calculated enthalpies of phase change (DH H ) were within the ranges previously reported for OCPs and other organic compounds (23.8-100.2 kJ mol À1 ). The salting-out constant, k s , ranged between 0.04 (g-HCH) and 1.80 L mol À1 (endosulfan II) indicating the importance of assessing the H values of OCPs in saline water to accurately determine their partitioning and fate in seawater. r

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Section: Gas-stripping Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature

Çetin

Özer

Sofuoğlu

et al. 2006

Atmospheric Environment

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“…Besides, the smaller crystallite size exposed a higher crystallite edge surface that might help in increased rate of degradation [27]. Hence, the decreased crystallite size in biofield energy treated 3-CNB sample may fasten the rate of degradation of 3-CNB molecules from environment either through the process of volatilization or vaporization [28,29].…”

Section: Thermogravimetric Analysis/ Derivative Thermogravimetry (Tgamentioning

confidence: 99%

Characterization of Biofield Energy Treated 3-Chloronitrobenzene: Physical, Thermal, and Spectroscopic Studies

Trivedi¹,

Branton²

2015

Int J Waste Resour

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“…The Henry's coefficient can be found in the literature, using the compilation of Sander or specific articles [36][37][38][39][40][41]. When the value cannot be found for a specific compound or in specific conditions, it remains possible to use some thermodynamic models which provide good accuracies [39,[42][43][44][45]. k L and K L are respectively the local and overall liquid film mass transfer coefficient (m.s -1 ) linked together by the following relation:…”

Section: Mass Transfer Ratementioning

confidence: 99%

Overview of mass transfer enhancement factor determination for acidic and basic compounds absorption in water

Biard

Couvert

2013

Chemical Engineering Journal

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Absorption or gas-liquid mass transfer is a fundamental unit operation useful in many fields, particularly gas treatment (wet scrubbing). Absorption of basic or acidic compounds, even hydrophobic, in water can be achieved successfully due to the mass transfer enhancement linked to proton transfer reactions in the liquid film. The absorption rate takes this phenomenon into account through the enhancement factor E, which depends on many parameters: nature (irreversible or reversible), kinetics and stoichiometry of the reaction, reagents and products diffusion coefficients and concentrations. This article gives an overview of the enhancement factor determination for acidic and basic compounds transfer in water. Modeling is performed for three compounds of interest, hydrogen sulfide H 2 S, methyl mercaptan CH 3 SH and ammonia NH 3 , for different scenarii to assess the influence of the pH. The results demonstrate that recombination with HO -and protonation reactions are respectively the two preponderant reactions for respectively acidic and basic compounds. They enable to reach large values of the enhancement factor at appropriated pH and to reduce the mass transfer resistance in the liquid film. Furthermore, the simulations highlight that, in many cases, knowledge of the reaction kinetics is not necessary since the reaction can be considered as instantaneous compared to mass transfer.

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Henry's law constants for a diverse set of organic chemicals: Experimental determination and comparison of estimation methods

Cited by 117 publications

References 35 publications

Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature

Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature

Characterization of Biofield Energy Treated 3-Chloronitrobenzene: Physical, Thermal, and Spectroscopic Studies

Overview of mass transfer enhancement factor determination for acidic and basic compounds absorption in water

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