Assessing the combined influence of TOC and black carbon in soil-air partitioning of PBDEs and DPs from the Indus River Basin, Pakistan.

Authors :: Ali U
Mahmood A
Syed JH
Li J
Zhang G
Katsoyiannis A
Jones KC
Malik RN
Source :: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2015 Jun; Vol. 201, pp. 131-40. Date of Electronic Publication: 2015 Mar 17.
Publication Year :: 2015
Abstract: Levels of polybrominated diphenyl ethers (PBDEs) and dechlorane plus (DPs) were investigated in the Indus River Basin from Pakistan. Concentrations of ∑PBDEs and ∑DPs were ranged between 0.05 and 2.38 and 0.002-0.53 ng g(-1) in the surface soils while 1.43-22.1 and 0.19-7.59 pg m(-3) in the passive air samples, respectively. Black carbon (fBC) and total organic carbon (fTOC) fractions were also measured and ranged between 0.73 and 1.75 and 0.04-0.2%, respectively. The statistical analysis revealed strong influence of fBC than fTOC on the distribution of PBDEs and DPs in the Indus River Basin soils. BDE's congener profile suggested the input of penta-bromodiphenylether (DE-71) commercial formulation in the study area. Soil-air partitioning of PBDEs were investigated by employing octanol-air partition coefficients (KOA) and black carbon-air partition coefficients (KBC-A). The results of both models suggested the combined influence of total organic carbon (absorption) and black carbon (adsorption) in the studied area.<br /> (Copyright © 2015 Elsevier Ltd. All rights reserved.)

Subjects :: Adsorption
Air Pollutants analysis
Environmental Monitoring methods
Environmental Monitoring statistics & numerical data
Pakistan
Soil Pollutants analysis
Soot analysis
Halogenated Diphenyl Ethers analysis
Hydrocarbons, Chlorinated analysis
Polycyclic Compounds analysis
Rivers
Soil chemistry

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