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Influential role of black carbon in the soil-air partitioning of polychlorinated biphenyls (PCBs) in the Indus River Basin, Pakistan

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Influential role of black carbon in the soil-air partitioning of polychlorinated biphenyls (PCBs) in the Indus River Basin, Pakistan. / Ali, Usman; Syed, Jabir Hussain; Mahmood, Adeel; Li, Jun; Zhang, Gan; Jones, Kevin C; Malik, Riffat Naseem.

In: Chemosphere, Vol. 134, 09.2015, p. 172-180.

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@article{b5661c4a64134b538fddefc2f2099ab1,
title = "Influential role of black carbon in the soil-air partitioning of polychlorinated biphenyls (PCBs) in the Indus River Basin, Pakistan",
abstract = "Levels of polychlorinated biphenyls (PCBs) were assessed in surface soils and passive air samples from the Indus River Basin, and the influential role of black carbon (BC) in the soil-air partitioning process was examined. ∑26-PCBs ranged between 0.002-3.03 pg m(-3) and 0.26-1.89 ng g(-1) for passive air and soil samples, respectively. Lower chlorinated (tri- and tetra-) PCBs were abundant in both air (83.9%) and soil (92.1%) samples. Soil-air partitioning of PCBs was investigated through octanol-air partition coefficients (KOA) and black carbon-air partition coefficients (KBC-A). The results of the paired-t test revealed that both models showed statistically significant agreement between measured and predicted model values for the PCB congeners. Ratios of fBCKBC-AδOCT/fOMKOA>5 explicitly suggested the influential role of black carbon in the retention and soil-air partitioning of PCBs. Lower chlorinated PCBs were strongly adsorbed and retained by black carbon during soil-air partitioning because of their dominance at the sampling sites and planarity effect.",
keywords = "PCBs, Soil-air partition model, Adsorption, Octanol-air partition coefficient, Black carbon-air partition coefficient, Indus River Basin",
author = "Usman Ali and Syed, {Jabir Hussain} and Adeel Mahmood and Jun Li and Gan Zhang and Jones, {Kevin C} and Malik, {Riffat Naseem}",
note = "Copyright {\textcopyright} 2015 Elsevier Ltd. All rights reserved.",
year = "2015",
month = sep,
doi = "10.1016/j.chemosphere.2015.03.020",
language = "English",
volume = "134",
pages = "172--180",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "NLM (Medline)",

}

RIS

TY - JOUR

T1 - Influential role of black carbon in the soil-air partitioning of polychlorinated biphenyls (PCBs) in the Indus River Basin, Pakistan

AU - Ali, Usman

AU - Syed, Jabir Hussain

AU - Mahmood, Adeel

AU - Li, Jun

AU - Zhang, Gan

AU - Jones, Kevin C

AU - Malik, Riffat Naseem

N1 - Copyright © 2015 Elsevier Ltd. All rights reserved.

PY - 2015/9

Y1 - 2015/9

N2 - Levels of polychlorinated biphenyls (PCBs) were assessed in surface soils and passive air samples from the Indus River Basin, and the influential role of black carbon (BC) in the soil-air partitioning process was examined. ∑26-PCBs ranged between 0.002-3.03 pg m(-3) and 0.26-1.89 ng g(-1) for passive air and soil samples, respectively. Lower chlorinated (tri- and tetra-) PCBs were abundant in both air (83.9%) and soil (92.1%) samples. Soil-air partitioning of PCBs was investigated through octanol-air partition coefficients (KOA) and black carbon-air partition coefficients (KBC-A). The results of the paired-t test revealed that both models showed statistically significant agreement between measured and predicted model values for the PCB congeners. Ratios of fBCKBC-AδOCT/fOMKOA>5 explicitly suggested the influential role of black carbon in the retention and soil-air partitioning of PCBs. Lower chlorinated PCBs were strongly adsorbed and retained by black carbon during soil-air partitioning because of their dominance at the sampling sites and planarity effect.

AB - Levels of polychlorinated biphenyls (PCBs) were assessed in surface soils and passive air samples from the Indus River Basin, and the influential role of black carbon (BC) in the soil-air partitioning process was examined. ∑26-PCBs ranged between 0.002-3.03 pg m(-3) and 0.26-1.89 ng g(-1) for passive air and soil samples, respectively. Lower chlorinated (tri- and tetra-) PCBs were abundant in both air (83.9%) and soil (92.1%) samples. Soil-air partitioning of PCBs was investigated through octanol-air partition coefficients (KOA) and black carbon-air partition coefficients (KBC-A). The results of the paired-t test revealed that both models showed statistically significant agreement between measured and predicted model values for the PCB congeners. Ratios of fBCKBC-AδOCT/fOMKOA>5 explicitly suggested the influential role of black carbon in the retention and soil-air partitioning of PCBs. Lower chlorinated PCBs were strongly adsorbed and retained by black carbon during soil-air partitioning because of their dominance at the sampling sites and planarity effect.

KW - PCBs

KW - Soil-air partition model

KW - Adsorption

KW - Octanol-air partition coefficient

KW - Black carbon-air partition coefficient

KW - Indus River Basin

U2 - 10.1016/j.chemosphere.2015.03.020

DO - 10.1016/j.chemosphere.2015.03.020

M3 - Journal article

C2 - 25933089

VL - 134

SP - 172

EP - 180

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -