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  • Title: Using SPMDs to monitor water column concentrations of PCDDs, PCDFs and dioxin-like PCBs in Port Jackson (Sydney Harbour), Australia.
    Author: Roach AC, Muller R, Komarova T, Symons R, Stevenson GJ, Mueller JF.
    Journal: Chemosphere; 2009 May; 75(9):1243-51. PubMed ID: 19249815.
    Abstract:
    Semipermeable membrane devices (SPMDs) were deployed on two occasions throughout Sydney Harbour, Australia, along a 25 km transect. They were used to measure spatial and temporal variation in the available concentrations of 7 polychlorinated dibenzo-p-dioxins (PCDDs) and 10 polychlorinated dibenzofurans (PCDFs) and 12 dioxin-like polychlorinated biphenyls (PCBs) in the water column. The relative percent difference (%RPD) among spatially replicated cages (within 0.13-0.41 km) ranged from less than 8% to greater than 66% across all congeners and was greater for WHO(05)-TEQ(DFP) (average=36%), PCDFs (average=34%) and PCDDs (average=33%) than PCBs (average=23%). Total PCDD (SigmaPCDDs) concentrations ranged between 2.7 and 84 pg L(-1), SigmaPCDF concentrations ranged from 0.15 to 7.2 pg L(-1), SigmaPCB concentrations ranged between 21 and 540 pg L(-1) and WHO(05)-TEQ(DFP) ranged from 0.069 to 1.85 pg L(-1). Highest concentrations were measured in SPMDs deployed in Homebush Bay and concentrations generally declined with distance from Homebush Bay. SPMDs detected changes in congener profiles downstream with OCDD, 2,3,7,8-TCDF and PCBs 189, 157, 167, and 126 increasing in proportion with distance from Homebush Bay. There was a large increase in the daily accumulation of the analytes from winter to summer resulting in an average 3.9-fold increase in the predicted concentration at one site with matched SPMDs.
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