Volatilization Characteristics of Organic Compounds in the Coagulation Process

Chao, Huan‐Ping; Lee, Jiunn‐Fwu; Lee, Chung‐Kung; Huang, Hui‐Chen

doi:10.1061/(asce)0733-9372(2005)131:9(1253)

Cited by 14 publications

(15 citation statements)

References 22 publications

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“…In other words, when the H values of the tested compounds decrease, the K OL values of the tested compounds under the liquid-mixing condition increase slowly. The result is consistent with other investigations (Lee et al, 2004;Chao et al, 2005a). The reason for this is ascribed to that high H compounds possess a low concentration at the liquid-gas interface, as has been published elsewhere (Chao et al, 2005a).…”

Section: Resultssupporting

confidence: 93%

“…The temperature of the oven was ranged from 60 C to 180 C, varying with the different chemicals. The detailed analytical method has been described in elsewhere (Lee et al, 2004;Chao et al, 2005a).…”

Section: Methodsmentioning

confidence: 99%

“…Some emitted organic compounds may be toxic to human beings, aquatic organisms, or plants. A number of investigators have studied the emission of organic compounds from various water bodies (Mackay and Yeun, 1983;Parker et al, 1993;Corsi et al, 1995;Lee et al, 2004;Chao et al, 2005a). The results indicate that the volatilization rates of organic solutes are governed by the properties of the solution and the properties of the organic compounds.…”

Section: Introductionmentioning

confidence: 95%

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Volatilization characteristics of organic solutes in stirred solution

Chao

2009

Journal of Environmental Management

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Section: Resultssupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

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Volatilization characteristics of organic solutes in stirred solution

Chao

2009

Journal of Environmental Management

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“…In general, the volatilization processes of organic compounds from water solutions may be regarded as a first order reaction (Peng et al, 1995;Dewulf et al, 1998;Chao et al, 2000;Chao et al, 2005a). The variation of the concentration of the organic compounds with time can be expressed as Chao, Aerosol and Air Quality Research, 12: 526-535, 2012 529 where C 0 is the initial concentration in the bulk-water phase and k is the rate constant (1/time).…”

Section: Calculation Of K Ol Values and α Valuesmentioning

confidence: 99%

“…The ( volatilizations of the organic solutes from wastewater. According to the traditional two-film model, the relationship between K OL and H for the high H solutes is defined difficultly (Chao et al, 2005a). A new model, that is, the surface-depletion rate-limiting (SDRL) model, was developed to describe the effects of H values on the volatilization rates of organic solutes (Lee et al, 2004a).…”

Section: Introductionmentioning

confidence: 99%

Emissions of Organic Compounds in Surfactant Solutions under Air Turbulence

Chao

2012

Aerosol Air Qual. Res.

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The objective of this study was to investigate the effects of surfactants aggregating the gas-liquid interface on the volatilization rates of the organic compounds. The changes in the overall mass transfer coefficient (K OL ) and concentration at gas-liquid interface of organic compounds in surfactant (dodecylbenzene sulfonic acid sodium, DBS) solutions under wind speed conditions were used to elucidate the results. The studied compounds consisted of aromatic compounds, benzene, toluene, ethylbenzene, m-dichlorobenzene, and propylbenzene with relatively higher Henry's law constants (H) and water solubilities (S w ), and chlorinated pesticides, α-endosulfan, heptachlor epoxide, endrin, and dieldrin, with relatively lower H and S w . Various surfactant concentrations, from 0 to 1000 mg/L under various wind speeds from 0 to 6.0 m/s, were used to examine the influence of the surfactant on the volatilization of the test organic compounds. The results indicated that the surfactant in the solution suppressed the volatilization of organic compounds. The degree of volatilization reduction was inversely proportional to the S w values of the test organic compounds. The curve profiles for the K OL values of the organic compounds in the surfactant solutions, relative to the selected wind speed, were divided into the following two stages: the sharp-rise stage and the stable-linearity stage. The critical finding was that the surfactant markedly enhanced the concentrations of the low S w compounds at the interface. The wind may cause an unexpected increase in the K OL value of the low S w compound in the solution that contains a high surfactant concentration.

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