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

Environmental Pollution
Usman AliRiffat Naseem Malik

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.

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Citations

Jan 14, 2016·Environment International·Pu WangGuibin Jiang
Sep 28, 2016·Environmental Monitoring and Assessment·Muhammad Wasim SajidAbdul Shakoor Chaudhry
Oct 16, 2016·Environmental Research·Mehreen IqbalKevin C Jones
Jul 14, 2017·Environmental Science & Technology·Mohammed A Khairy, Rainer Lohmann
Dec 3, 2016·Environmental Science and Pollution Research International·Xiaowei WuGan Zhang

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