A Study on the Solubility of PCDDs/DFs when in Coexistence with Dissolved Humic Matter

Ohsako, Masahiro; Lee, Dong‐Hoon

doi:10.3985/jswme.10.214

Cited by 12 publications

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“…From the results of dioxins and DHM mentioned above, it is not unreasonable to assume that dioxins would be bound to DHM with linearity, as other HOPs have done, and to apply the results of this study for the removal of dioxins whose K OC are estimated as 6.28 -8.39 (Kim et al 1999) in leachate. Fig.…”

Section: Applicability To Dioxins and Estimation Of Removal Efficiencmentioning

confidence: 96%

Removal of hydrophobic organic pollutants by coagulation-precipitation process with dissolved humic matter

Osako

Lee

2002

Waste Manag Res

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The removal of hydrophobic organic pollutants (HOPs) from water with precipitating dissolved humic matter (DHM) was found to depend on the physical and chemical properties of the HOPs themselves, and could be estimated theoretically. The removal efficiency of HOPs was decreased at high pH and with increasing ionic strength; in particular, when ionic strength increased, the decrease was small. In deionised water, the removal efficiencies of pyrene, fluoranthene, anthracene and phenanthrene were about 75%, 57%, 40% and 30% respectively in the DHM range used, and increased clearly with increasing concentration of DHM. The difference of removal efficiency resulted from the physical and chemical characteristics of the HOPs such as partition coefficient to DHM (K(OC)), whose order is pyrene > fluoranthene > anthracene > phenanthrene. Because of the large partition coefficients of dioxins to DHM, removal efficiencies of 90 to 99.9% could be obtained with only a few mg l(-1) of organic carbon (OC) in DHM and 99 to 99.99% with over ten mg-OC l(-1) in DHM.

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Section: Applicability To Dioxins and Estimation Of Removal Efficiencmentioning

confidence: 96%

Removal of hydrophobic organic pollutants by coagulation-precipitation process with dissolved humic matter

Osako

Lee

2002

Waste Manag Res

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“…4 compares the theoretical and field removal efficiencies in the overall processes. The theoretical removal efficiency depending on Koc was transformed into the form depending on Kow using the relationship of Koc and Kow by Kim et al (1999b). As shown in Fig.…”

Section: Removal Characteristics Of Pops Depending On Log Kowmentioning

confidence: 99%

A study on the appearance of persistent organic pollutants (POPs) in leachate treatment processes

Ohsako

2002

Waste Manag Res

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The presence of PCDDs/DFs, PCBs and PAHs in the adsorbed or dissolved phases (depending on the leachate treatment process) was investigated in two landfills in Japan (Landfill M and Landfill N). The results of the investigations showed that, in general, persistent organic pollutants (POPs) having high Kow such as PCDDs/DFs and PCBs tended to exist in the adsorbed phase in both Landfill M and Landfill N. Furthermore, it was confirmed that their presence depended on log Kow by the appearance of PAHs.

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Effect of Adsorption Capacity of Dissolved Humic Matter on Leachability of Dioxins from Raw and Treated Fly Ashes of Municipal Solid Waste Incinerators

Kim

Osako

2004

Arch Environ Contam Toxicol

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The purposes of this study are to obtain information on the leachability of dioxins depending on the samples, to confirm the effect of dissolved humic matter (DHM) on the leachability of dioxins, and to evaluate the suitability of the detoxification treatments specified by the Japanese government for the reduction of leachability of dioxins. In this study, the leachability of dioxins from raw and treated fly ash was evaluated by a 24-hour batch leaching test and by an extraction test repeated three times with DHM solution, whose concentration was determined to be 700 mg-OC/L as an initial concentration based on organic carbon (OC) from adsorption tests of DHM to fly ash. The leaching concentration from fly ash samples having high DHM adsorption capacity was low regardless of pH, and that from samples having relatively low adsorption capacity and high pH was largely increased. Therefore, it is expected that the leachability of dioxins from treated fly ashes would be reduced by avoiding high pH and enhancing the DHM adsorption capacity rather than by using the detoxification method specified. We also confirmed that increase of the leachability of HOPs due to DHM is not as large as known in condition that is composed of three phases of HOPs, DHM, and solid matrix.

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A Study on the Solubility of PCDDs/DFs when in Coexistence with Dissolved Humic Matter

Cited by 12 publications

References 0 publications

Removal of hydrophobic organic pollutants by coagulation-precipitation process with dissolved humic matter

Removal of hydrophobic organic pollutants by coagulation-precipitation process with dissolved humic matter

A study on the appearance of persistent organic pollutants (POPs) in leachate treatment processes

Effect of Adsorption Capacity of Dissolved Humic Matter on Leachability of Dioxins from Raw and Treated Fly Ashes of Municipal Solid Waste Incinerators

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