Biomimetic accumulation of PAHs from soils by triolein-embedded cellulose acetate membranes (TECAMs) to estimate their bioavailability

Tao, Yuqiang; Zhang, Shuzhen; Wang, Zijian; Ke, Runhui; Shan, Xiao-quan; Christie, Peter

doi:10.1016/j.watres.2007.08.006

Cited by 23 publications

(21 citation statements)

References 38 publications

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“…Previous studies (Tao et al, 2008) has indicated that the extractable fraction of PAHs in the spiked soil approaches a constant level after such incubation.…”

Section: Soil Preparation and Tecam Samplingmentioning

confidence: 93%

“…A good linear relationship exists between log K TECAM-w (partition coefficient between TECAM and water) and log K ow of Nap, Phe, Pyr and BaP (Tao et al, 2008) in the aqueous system, and their relationship has been found to be:…”

Section: Estimating Concentration Of Pahs In Soil Solution With Tecammentioning

confidence: 98%

“…These advantages provide TECAM with some potential applications in sampling of HOCs from complex environmental matrices such as soils. Our previous study (Tao et al, 2008) has indicated that TECAM can be applied successfully to accumulate naphthalene, phenanthrene, pyrene and benzo[a]pyrene from spiked soils and the uptake of PAHs by TECAM was correlated with soil properties and was sensitive to aging of PAHs in soils.…”

Section: Introductionmentioning

confidence: 99%

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Predicting bioavailability of PAHs in field-contaminated soils by passive sampling with triolein embedded cellulose acetate membranes

Tao

Zhang

Wang

et al. 2009

Environmental Pollution

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“…Previous studies (Tao et al, 2008) has indicated that the extractable fraction of PAHs in the spiked soil approaches a constant level after such incubation.…”

Section: Soil Preparation and Tecam Samplingmentioning

confidence: 93%

Section: Estimating Concentration Of Pahs In Soil Solution With Tecammentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predicting bioavailability of PAHs in field-contaminated soils by passive sampling with triolein embedded cellulose acetate membranes

Tao

Zhang

Wang

et al. 2009

Environmental Pollution

Self Cite

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“…Accumulation in organisms and concentrations in the tissues have been suggested as biological endpoints in many studies on the bioavailability of organic pollutants such as PAHs, polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethanes (DDTs), and atrazine (Morrison et al, 2000;Tao et al, 2008;Song et al, 2011). These pollutants are persistent organic pollutants (POPs), which could easily accumulate in plants or animals.…”

Section: Introductionmentioning

confidence: 99%

Integration of Chemical Methods and Biomarkers for Assessment of Chlorimuron-Ethyl Bioavailability in Soil

et al. 2016

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Bioavailability is a critical factor for assessing the environmental risk of organic pollutants in soil. In this study, extractions with 3 different solvents, including 2 aqueous solutions, calcium chloride (CaCl 2 ) and a phosphate buffer solution (PBS), and a mixture of aqueous solution and organic solvent, a PBS-methanol (8:2, volume/volume) mixture (PBS-M), were performed to assess the bioavailability of chlorimuron-ethyl in soil in comparison to a battery of toxicity tests in wheat seedlings. The results indicated that the peroxidase (POD) activity in wheat leaves after 7 d of exposure was one of the sensitive biomarkers of chlorimuron-ethyl in soil. The extractability of chlorimuron-ethyl by all the 3 solvents decreased with exposure time, and the rate of decrease of the PBS-M extraction between 1 and 7 d of exposure was substantially higher than those of the aqueous solution extractions. Chlorimuron-ethyl gradually changed from a water-soluble form into a soil organic matter (SOM)-bound form in the soil. The PBS extraction correlated best with the POD activity in the leaves after 7 d of exposure. Key Words:chemical extraction, environmental risk, organic pollutants, organic solvent, peroxidase activity, phosphate buffer solution, toxicity test

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“…The former, including desorbing and non-desorbing fractions, is the available fraction of a compound in soil that can be absorbed by plants and/or soil-inhabiting animals, while the latter is generally much less available for plant uptake (Führ and Mittelstaedt 1980;Dec et al 1997). The available concentration of an organic pollutant is less than its total concentration in soil (Heemken et al 1997;Noordkamp et al 1997;Tang et al 2002;Tao et al 2008). Therefore, it is inappropriate to use the total concentration as a measure of potential exposure of plants or soil organisms.…”

Section: Introductionmentioning

confidence: 99%

Availability of polycyclic aromatic hydrocarbons in aging soils

et al. 2010

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Purpose The soil contamination by hydrophobic organic contaminants (HOCs), such as polycyclic aromatic hydrocarbons (PAHs), poses great threats to human health and ecological security and attracts worldwide concerns. The total HOC concentrations overestimate its available fraction to the soil biota. Increased understanding of the availabilities of PAHs in soil environment will have considerable benefits for their risk assessment and be very instructive to food safety and remediation strategies in contaminated sites. However, the availability of PAHs in aging soils and particularly the correlations of the availabilities with their forms in soils have yet to be elucidated. In this work, the availabilities of PAHs in aging soils were evaluated using a sequential mild extraction technique. Materials and methods Four typical zonal soils in China previously free of PAHs were collected from A (0-20 cm) horizon, air-dried, and sieved. Soils were spiked with a solution of phenanthrene and pyrene as representative PAHs in acetone. After the acetone evaporated off, the treated soils were progressively diluted with unspiked soils and sieved again several times to homogenize the soil samples. The forms of PAHs in soils were experimented using microcosms that are similar to those reported in literature. Various treated soils were packed into amber glass microcosms (each with 25 g soil). Three replications were given for each treatment. NaN 3 solution (0.5%) was added to some microcosms in order to get the microbeinhibited treatments. The soil water contents were adjusted to be 20% of soil water-holding capacity. After incubation for 0, 2, 4, 8, 12, and 16 weeks in microcosms with a temperature of 25°C, the soils were sampled. PAHs were then extracted by a sequential mild extraction technique, and their forms and availabilities were determined. Results and discussion The available residual concentrations of phenanthrene and pyrene generally decreased with aging time, and the PAHs were more readily available at the start of the incubation, but their availabilities decreased rapidly with increasing the soil-PAH contact time. In addition, the degradation efficiency of the available PAHs in soils was generally higher for PAHs with low molecular weight. The available residues of PAHs in soils were fractionated into desorbing and non-desorbing fractions. The desorbing fractions were the largest portion of the available PAHs in soils. In addition, the desorbing fractions were the main portion to be readily biodegradable. The non-desorbing fractions of PAHs were less bioavailable and with less possibility to be biodegraded in soils. The dissipation of the desorbing PAH fractions accounted for the dominant contribution to the dissipation of the available fractions of tested PAHs. The formation of bound PAH residues was observed in soils. However, the concentrations of the bound residual PAHs were very low. Comparing with the microbial biodegradation, the transformation of PAHs from available fractions to bound residues was a negligible ...

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Biomimetic accumulation of PAHs from soils by triolein-embedded cellulose acetate membranes (TECAMs) to estimate their bioavailability

Cited by 23 publications

References 38 publications

Predicting bioavailability of PAHs in field-contaminated soils by passive sampling with triolein embedded cellulose acetate membranes

Predicting bioavailability of PAHs in field-contaminated soils by passive sampling with triolein embedded cellulose acetate membranes

Integration of Chemical Methods and Biomarkers for Assessment of Chlorimuron-Ethyl Bioavailability in Soil

Availability of polycyclic aromatic hydrocarbons in aging soils

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