Investigating a leaching test for PCBs and organochlorine pesticides in waste and building materials

Rood, G.A.; Broekman, M.H; Aalbers, Th.G.

doi:10.1016/s0166-1116(08)71464-x

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…The standards for batch leaching (Parts 1–2) are designed as shake tests and are fast, relatively cheap, and easy to conduct. However, when applied for assessment of HOCs, like PAHs, these tests have proven to overestimate the leaching by orders of magnitude. − The main reason for this bias is caused by the vigorous mixing of the sample, which leads to release of small particles and colloids , accompanied by adsorbed contaminants. , Since filtration of leachates should be avoided when analyzing for HOCs due to risk of analyte losses by adsorption to filters, , the standard protocols for shake tests prescribe centrifugation and decantation instead. This is, however, an imprecise method for separation since colloidal particles will be retained in the (supernatant) leachate.…”

Section: Introductionmentioning

confidence: 99%

“…23−25 The main reason for this bias is caused by the vigorous mixing of the sample, which leads to release of small particles and colloids 26,27 accompanied by adsorbed contaminants. 28,29 Since filtration of leachates should be avoided when analyzing for HOCs due to risk of analyte losses by adsorption to filters, 30,31 the standard protocols for shake tests prescribe centrifugation and decantation instead. This is, however, an imprecise method for separation since colloidal particles will be retained in the (supernatant) leachate.…”

Section: ■ Introductionmentioning

confidence: 99%

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Combining Leaching and Passive Sampling To Measure the Mobility and Distribution between Porewater, DOC, and Colloids of Native Oxy-PAHs, N-PACs, and PAHs in Historically Contaminated Soil

Enell

Lundstedt

Arp

et al. 2016

Environ. Sci. Technol.

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Different methods to quantify soil porewater concentrations of contaminants will provide different types of information. Passive sampling measurements give freely dissolved porewater concentrations (C), while leaching tests provide information on the mobile concentration (C), including contaminants associated with dissolved organic carbon (DOC) and particles/colloids in the porewater. This study presents a novel combination of these two measurements, to study the sorption and mobility of polycyclic aromatic compounds (PACs) to DOC and particulate organic carbon (POC) in 10 historically contaminated soils. The PACs investigated were polycyclic aromatic hydrocarbons (PAHs), oxygenated-PAHs, and nitrogen containing heterocyclic PACs. Observed C was up to 5 orders of magnitude higher than C; implying large biases when C is used to assess bioavailability or soil partitioning. Sorption of PACs to DOC and POC was important for the mobility of compounds with log K > 4. Average DOC/water-partitioning coefficients (K) correlated well with K (log K = 0.89 × log K +1.03 (r = 0.89)). This relationship is likely more accurate for historically contaminated soils than previously published data, which suffer from artifacts caused by problems in measuring C correctly or not using historically contaminated soils. POC/water-partitioning coefficients (K) were orders of magnitude larger than corresponding K suggesting sorption to mobile particles/colloids is the dominant mechanism for PAC mobility.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Combining Leaching and Passive Sampling To Measure the Mobility and Distribution between Porewater, DOC, and Colloids of Native Oxy-PAHs, N-PACs, and PAHs in Historically Contaminated Soil

Enell

Lundstedt

Arp

et al. 2016

Environ. Sci. Technol.

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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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The application of urban anthropogenic background to pollution evaluation and source identification of soil contaminants in Macau, China

Xie

Lü

Wang

et al. 2021

Science of The Total Environment

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Investigating a leaching test for PCBs and organochlorine pesticides in waste and building materials

Cited by 6 publications

References 2 publications

Combining Leaching and Passive Sampling To Measure the Mobility and Distribution between Porewater, DOC, and Colloids of Native Oxy-PAHs, N-PACs, and PAHs in Historically Contaminated Soil

Combining Leaching and Passive Sampling To Measure the Mobility and Distribution between Porewater, DOC, and Colloids of Native Oxy-PAHs, N-PACs, and PAHs in Historically Contaminated Soil

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

The application of urban anthropogenic background to pollution evaluation and source identification of soil contaminants in Macau, China

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