Characterization of polychlorinated biphenyls and polybrominated diphenyl ethers in sediments from leachate and control wells of Benowo Dumping Site, Surabaya, Indonesia: a preliminary report

Concentrations of polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) have been measured in fourteen sediment samples collected from leachate ponds, control wells, leachate treatment plants (LTPs), and a reference site of Benowo dumping site of Surabaya City, Indonesia. The PCBs and PBDEs were analyzed by gas chromatograph-mass spectrometer (GC-MS) using internal standards. Concentrations of ∑PCBs and ∑PBDEs in all samples ranged from 0.10 to 30 ng/g dw (mean = 8.8 ng/g dw) and 0.08 to 45 ng/g dw (mean = 7.8 ng/g dw), respectively. Although the profiles of PCBs and PBDEs varied between the sites, overall pattern showed domination of hexa-, penta-, tri-, tetra- and heptaCBs, respectively for PCBs, and BDE-209, -207, -206, -99 and -47, respectively for PBDEs. The profiles indicated either Ar1260, KC600, or ClophenT64 and Deca-BDE product mixture were widely used in Surabaya City. Furthermore, decreasing levels of PCBs and PBDEs were observed along the LTPs system, indicating the capacity of this system to reduce and degrade those contaminants. To our knowledge, this is the first study on the characterization of PCBs and PBDEs in sediments from leachate pond, control wells, and LTPs system in and around dumping site.