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Tracking the fingerprints and combined TOC–black carbon mediated soil–air partitioning of polychlorinated naphthalenes (PCNs) in the Indus River Basin of Pakistan

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  • Usman Ali
  • Laura Sánchez-García
  • Muhammad Yasir Abdur Rehman
  • Jabir Hussain Syed
  • Adeel Mahmood
  • Jun Li
  • Gan Zhang
  • Kevin Christopher Jones
  • Riffat Naseem Malik
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<mark>Journal publication date</mark>01/2016
<mark>Journal</mark>Environmental Pollution
Issue numberPart B
Volume208
Number of pages9
Pages (from-to)850-858
Publication StatusPublished
Early online date21/11/15
<mark>Original language</mark>English

Abstract

This study reports the first investigation of polychlorinated naphthalenes (PCNs) in air and soil samples from ecologically important sites of the Indus River Basin, Pakistan. The concentrations of ∑39-PCNs in air and soil were found in a range between 1–1588 pg m−3 and 0.02–23 ng g−1 while the mean TEQ values were calculated to be 5.4E−04 pg TEQ m−3 and 1.6E+01 pg TEQ g−1, respectively. Spatially, air and soil PCN concentrations were found to be high at Rahim Yar Khan (agricultural region). Lower-medium chlorinated PCNs (sum of tri-, tetra- and penta-CNs) predominated in both air and soil, altogether constituting 87 and 86% of total PCNs in the two environmental matrices, respectively. According to the data, soil–air partitioning of PCNs was interpreted to be similarly controlled by the combined effect of black carbon and organic matter in the Indus River Basin, with no preferential implication of the recalcitrant organic form.