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Assessing the relationship and influence of black carbon on distribution status of organochlorines in the coastal sediments from Pakistan

Research output: Contribution to journalJournal article


  • Usman Ali
  • Jabir Hussain Syed
  • Liu Junwen
  • Laura Sánchez-García
  • Riffat Naseem Malik
  • Muhammad Jamshed Iqbal Chaudhry
  • Masood Arshad
  • Jun Li
  • Gan Zhang
  • Kevin C. Jones
<mark>Journal publication date</mark>07/2014
<mark>Journal</mark>Environmental Pollution
Number of pages9
<mark>Original language</mark>English


Levels of total organic carbon (TOC) and black carbon (BC) were determined together with those of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in the selected eighteen coastal sites (n = 285) along the Arabian Sea from Pakistan. Results showed that the total concentration of TOC, BC, ∑OCPs and ∑26PCBs ranged between 0.3 and 2.9% dw, 0.1-0.2% dw, 0.9-110 ng g(-1) dw and 6.2-1200 ng g(-1) dw, respectively. Correlation analysis of BC (r = 0.26-0.89) and TOC (r = 0.06-0.69) revealed a stronger association with studied compounds. The sedimentary depositional fluxes (D) for ∑OCPs and ∑26PCBs were calculated as 1.7 and 4.9 tons yr(-1), respectively. In the coastal belt of Pakistan, sedimentary mass inventories (I) indicated the presence of 13 and 37 metric tons of ∑OCPs and ∑26PCBs, respectively.