SPATIAL AND VERTICAL DISTRIBUTION OF BROMINATED FLAME RETARDANTS IN SEDIMENTS FROM MANILA BAY, THE PHILIPPINES
Brominated flame retardants, including polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecanes (HBCDs), as well as PCBs were determined in surface and core sediments from Manila Bay, the Philippines. Organohalogen compounds analyzed in the present study were detected in most of the surface sediment samples, indicating ubiquitous pollution by these contaminants. Concentrations of BDE-209 were slightly higher than those of PCBs, probably because of the extensive usage of PBDEs in the Philippines. HBCD levels were two orders of magnitude lower than those of PCBs and PBDEs, suggesting that HBCDs are not extensively used in the Philippines. Concentrations of analytes were higher in the eastern part of the bay, implying municipal and industrial areas could be pollution sources of these chemicals. Results of sediment core analysis indicated highest concentrations of PCBs and PBDEs in the sediment layer deposited in the late 1990s. Although no obvious trend was observed for HBCDs due to low levels, it may increase in the future if usage is extended to developing countries.
Isobe T Amano A Chang K H Miller T W Maneja R H Zamora P B San Diego-McGlone M L Siringan F Tanabe S
Center for Marine Environmental Studies (CMES),Ehime University,Bunkyo-cho 2-5,Matsuyama 790-8577,Ja Center for Marine Environmental Studies (CMES),Ehime University,Bunkyo-cho 2-5,Matsuyama 790-8577,Ja Center for Marine Environmental Studies (CMES),Ehime University,Bunkyo-cho 2-5,Matsuyama 790-8577,Ja Marine Science Institute,University of the Philippines,Diliman,Quezon City 1101,Philippines
国际会议
北京
英文
1-5
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）