Is there sufficient ‘sink’ in current bioaccessibility determinations of organic pollutants in soils?

Collins, Christopher D.; Mosquera-Vazquez, M.; Gomez-Eyles, Jose L.; Mayer, Philipp; Gouliarmou, Varvara; Blum, F.

doi:10.1016/j.envpol.2013.05.053

Cited by 46 publications

(34 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Liang et al (2012) reported 304,000-435,000 ng/g in soil from oil exploring areas, and 435- Yang et al 2012 ), while the urban soils are found to be more contaminated with PAHs concentrations ranged from 199 to 51, 822 ng/g (Morillo et al 2007;Rhind et al 2013;Jiang et al 2009;Ma and Zhou 2011). Soil often serves as a great sink storing pollutants from different sources of adjacent regions (Irene and Gerhard 2009;Collins et al 2013). PAHs in soil of oil fields across China with concentrations between 480 to 45, 325 ng/g indicated that the soil around oil fields stored great amount of PAHs (mean, 12,759 ng/g) and need to be regulated as its potential ecological and health risk.…”

Section: Pahs Concentrationsmentioning

confidence: 97%

Carcinogenic potential of PAHs in oil-contaminated soils from the main oil fields across China

Wang

Cao

Liao

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

The concentrations, composition profiles, and sources of polycyclic aromatic hydrocarbons (PAHs) were analyzed in 55 surface soil samples collected from four oil fields across China (Daqing, DQ; Shengli, SL; Xinjiang, XJ; and Huabei, HB). The total 16 priority PAHs concentrations of DQ, SL, XJ, and HB ranged from 857 to 27,816; 480 to 20,625; 497 to 43,210; and 12,112 to 45,325 ng/g, respectively, with means of 9160; 6394; 13,569; and 22,954 ng/g and the seven possible carcinogenic PAHs accounted for 8-25.7 % of the total PAHs. Almost all the samples were heavily contaminated, and phenanthrene, chrysene, and pyrene were the most dominant components. The PAH isomeric ratios indicated that PAHs in oil fields mainly originated from petroleum. The toxic assessment illustrated that people living and working in oil fields would suffer low carcinogenic risk, which was somehow coincided with the results of epidemiological survey on cancer incidence. It seems essential to pay more attention to the chronic human health effects of exposure to oil fields and to focus new studies on the public health field that involves a large number of people all over the world.

show abstract

Section: Pahs Concentrationsmentioning

confidence: 97%

Carcinogenic potential of PAHs in oil-contaminated soils from the main oil fields across China

Wang

Cao

Liao

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…It is technically challenging to quantify bioaccessibility of organic contaminants from highly sorptive materials as for instance biochar (Mayer et al 2016). Several papers state the so called infinite sink conditions via depletive methods as a prerequisite to determine the bioaccessibility of hydrophobic organic compounds (i) in matrices that have high K i,D s (>3 log units) (Cornelissen et al 2001;Hilber et al 2009;Mayer et al 2011;Gouliarmou, Mayer 2012;Collins et al 2013;Mayer et al 2016).…”

Section: Sorption and Desorption Of Organic Compoundsmentioning

confidence: 99%

The Different Faces of Biochar: Contamination Risk Versus Remediation Tool

Hilber

Bastos

Loureiro

et al. 2017

Journal of Environmental Engineering and Landscape Management

View full text Add to dashboard Cite

This article reviews the different aspects of biochar as source and sink of organic and inorganic contaminants. Biochar can contain organic contaminants such as polycyclic aromatic hydrocarbons or heavy metals. As the distribution coefficients of the biochar especially for contaminants are high, the freely dissolved concentrations are low and with that also the bioavailability. The link between biochar’s inherent contaminants and toxicity to soil meso– and macro–fauna remains unclear, with data being often contradictory and influenced by feedstock and pyrolysis conditions. The biochar’s potential to remediate contaminated soils has mainly been addressed in lab studies, but rarely in the field. This far, results have been contradicting. Many studies reported successful immobilization of contaminants but some not. In summary, the ambivalent face of the biochar with regard to contaminants prevails. In future, long term field studies are needed to properly address the sustainability of biochar in this respect.

show abstract

“…Only the bioaccessible fraction, which is released from the soil during the passage through the gastrointestinal tract, can become available for resorption and thus produce toxic effects (Hack and Selenka 1996;Tilston et al 2011). In vitro digestive or gastrointestinal tract models (physiologically based extraction tests, PBET) are used to determine contaminant bioaccessibility from soil samples (Hack and Selenka 1996;Ruby et al 1996;Oomen et al 2002;Scott and Dean 2005;Minhas et al 2006;Tilston et al 2011;Lorenzi et al 2012;Collins et al 2013). PBET models simulate the digestive conditions in the human gastrointestinal tract to assess the amount of contaminant that is mobilized under these conditions.…”

Section: Introductionmentioning

confidence: 99%

Impact of reference geosorbents on oral bioaccessibility of PAH in a human in vitro digestive tract model

Meyer

Kons

Achten

2014

Environ Sci Pollut Res

View full text Add to dashboard Cite

Former studies on human oral bioaccessibility of polycyclic aromatic hydrocarbons (PAH) from natural soil samples using human in vitro digestive tract models (physiologically based extraction tests, PBET) show highly variable results (0-100% of mobilized PAH). Apart from other factors, the type and amount of present geosorbents are assumed to be significant for the degree of desorption/release of PAH into the digestive juice. Therefore, in this study, the reference geosorbents pure quartz sand, Na-montmorillonite clay, Pahokee peat, and charcoal "Sommerhit" were spiked with selected deuterated PAH and employed as single materials in a PBET. Lowest bioaccessibility was determined in charcoal, representing black carbon (0.1 ± 0.1 % for ∑10 PAH-d) in contrast to higher bioaccessibility in peat (6.4 ± 2.2%) and clay (4.8 ± 1.1%). Highest bioaccessibility was determined in sand (26.9 ± 7.5%). The results show a systematic impact of heterogeneous geosorbents on human oral bioaccessibility of PAH and particularly black carbon acting as a very strong geosorbent that reduces human health risk.

show abstract

Is there sufficient ‘sink’ in current bioaccessibility determinations of organic pollutants in soils?

Cited by 46 publications

References 31 publications

Carcinogenic potential of PAHs in oil-contaminated soils from the main oil fields across China

Carcinogenic potential of PAHs in oil-contaminated soils from the main oil fields across China

The Different Faces of Biochar: Contamination Risk Versus Remediation Tool

Impact of reference geosorbents on oral bioaccessibility of PAH in a human in vitro digestive tract model

Contact Info

Product

Resources

About