해양환경 중 PCBs와 PBDEs에 대한 수동 수질시료채취장치(PWSD)흡착 효율 향상을 위한 연구
Improving the Adsorption Efficiencies of Polychlorinated Biphenyls and Polybrominated Diphenyl Ethers Using a Passive Water Sampling Device in Marine Environment
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This study focused on improving the adsorption efficiencies of organic micropollutants, such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) using a passive water sampling device (PWSD) in a marine environment during summer. Two factors were considered when increasing the adsorption efficiency by improving the sampling rate (Rs) of PWSDs for target PCBs and PBDEs: 1. Controlling the invasion of the sticky organisms that cause biofouling by tearing the semipermeable membrane device (SPMD) inside the PWSD canister; 2. Preventing various suspended solids from clogging the PWSD pores. To resolve these problems, two types of enhanced PWSD samplers were devised, namely a round prest-type PWSD canister with zooplankton netting (netted), and a copper-coated prest-type PWSD canister. Copper is generally toxic to marine organisms. The netted and copper-coated PWSD samplers were deployed in Masan Bay and Ulsan Bay and their adsorption efficiencies for PCBs and PBDEs were compared with that of the prest-type PWSD sampler. The copper-coated PWSD had an Rs 1.5~1.8 times higher than that of the netted and prest-type PWSDs. A comparison of the adsorption amount of PCBs and PBDEs showed similar results, and copper-coated PWSD adsorbed more target compounds than the netted and prest-type PWSDs. The adsorption patterns of PCB homologues were similar regardless of the sampling site and sampler type, but those of PBDE homologues in the netted and prest-type PWSDs deployed in Ulsan Bay were somewhat different from the others. By comparing the adsorption amounts of PCB and PBDE homologues according to the octanol-water partition coefficients, it was found that the copper-coated PWSD adsorbed more PCBs and PBDEs than the netted and prest-type PWSDs, especially high molecular homologues. Based on these results, the copper-coated PWSD could be used to effectively prevent the biofouling of the SPMD membrane and clogging of the PWSD canister during both summer and winter.
Abstract
This study focused on improving the adsorption efficiencies of organic micropollutants, such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) using a passive water sampling device (PWSD) in a marine environment during summer. Two factors were considered when increasing the adsorption efficiency by improving the sampling rate (Rs) of PWSDs for target PCBs and PBDEs: 1. Controlling the invasion of the sticky organisms that cause biofouling by tearing the semipermeable membrane device (SPMD) inside the PWSD canister; 2. Preventing various suspended solids from clogging the PWSD pores. To resolve these problems, two types of enhanced PWSD samplers were devised, namely a round prest-type PWSD canister with zooplankton netting (netted), and a copper-coated prest-type PWSD canister. Copper is generally toxic to marine organisms. The netted and copper-coated PWSD samplers were deployed in Masan Bay and Ulsan Bay and their adsorption efficiencies for PCBs and PBDEs were compared with that of the prest-type PWSD sampler. The copper-coated PWSD had an Rs 1.5~1.8 times higher than that of the netted and prest-type PWSDs. A comparison of the adsorption amount of PCBs and PBDEs showed similar results, and copper-coated PWSD adsorbed more target compounds than the netted and prest-type PWSDs. The adsorption patterns of PCB homologues were similar regardless of the sampling site and sampler type, but those of PBDE homologues in the netted and prest-type PWSDs deployed in Ulsan Bay were somewhat different from the others. By comparing the adsorption amounts of PCB and PBDE homologues according to the octanol-water partition coefficients, it was found that the copper-coated PWSD adsorbed more PCBs and PBDEs than the netted and prest-type PWSDs, especially high molecular homologues. Based on these results, the copper-coated PWSD could be used to effectively prevent the biofouling of the SPMD membrane and clogging of the PWSD canister during both summer and winter.
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