[논문]고속회전식 수동형 채집 장치를 이용한 한반도 주변해역에서의 자유용존상 PAHs 측정

장유리; 이효진; 정해진; 정다영; 김나영; 김기범

doi:10.7850/jkso.2021.26.1.037

고속회전식 수동형 채집 장치를 이용한 한반도 주변해역에서의 자유용존상 PAHs 측정
Determination of Freely Dissolved PAHs in Seawater around the Korean Peninsula Using High Speed Rotation-Type Passive Sampling Device 원문보기

바다 : 한국해양학회지 = The sea : the journal of the Korean society of oceanography, v.26 no.1, 2021년, pp.37 - 48

장유리 (경상대학교 해양시스템공학과) , 이효진 (국립수산과학원 해역이용영향평가센터) , 정해진 (경상대학교 해양시스템공학과) , 정다영 (경상대학교 해양시스템공학과) , 김나영 (경상대학교 해양환경공학과) , 김기범 (경상대학교 해양환경공학과)

초록
AI-Helper

본 연구에서는 해수 중 생물에게 실질적으로 이용되어질 수 있는 자유용존상 농도(freely dissolved concentration)를 보다 쉽고 빠르게 검출하고자 해수를 고속으로 회전시키는 수동형 채집 장치를 제작하였다. 이 고속회전식 수동형 채집 장치(high speed rotation-type passive sampling device)를 한반도 주변해역에 적용하여 해수 중 다환방향족탄화수소(polycyclic aromatic hydrocarbons, PAHs)의 자유용존상 농도를 측정하였다. 또한 대용량 해수 채취법(high volume water sampling)으로부터 구한 PAHs의 용존상 농도(dissolved concentration)와 고속회전식 수동형 채집 장치로부터의 자유용존상 농도를 비교하여 생물에게 직접적으로 이용 될 수 있는 비율을 조사하였다. 그 결과, 고속회전식수동형 채집 장치 모터의 회전속도를 900 rpm으로 가동하였을 때, 소수성이 낮은 저분자 PAHs 화합물(log KOW 3.4 ~ 5.2)은 5시간 만에 평형에 도달하였다. 반면 소수성이 비교적 높은 고분자 화합물(log KOW 5.6 ~ 6.8)의 경우, 평형에 도달하는 데 걸리는 시간은 최소 2일에서 한 달 정도 소요될 것으로 예상되었다. 그러나 실행보정물질(performance reference compounds)를 이용할 경우, 5시간 가동만으로도 평형상태에서의 고분자 화합물의 농도 예측이 가능하였다. 수동형 채집 장치를 적용하여 측정된 조사해역에서의 PAHs의 자유용존상 농도는 0.32 ~ 1.2 ng/L으로 다른 대양에서의 농도보다는 높았지만, 항구나 해안과 같은 연안보다는 매우 낮은 수준이었다. 용존상 및 자유용존상이 모두 검출된 PAHs를 대상으로 생물에게 이용 될 수 있는 비율은 서해병 폐기물 배출해역 위치와 인접한 조사구간에서 가장 높았다. 또한 생물 체내 잔류농도를 예측하였을 때, 폐기물 배출해역이 포함된 외해가 연안보다 비교적 높은 것으로 나타났다.

Abstract ▼ AI-Helper

A new high speed rotation type-passive sampling device (HSR-PSD), which can rotate seawater at high speed and absorb easily and quickly the freely dissolved hydrophobic organic contaminants from seawater, was developed and then applied around the Korean Peninsula. Freely dissolved concentrations (Cfree) of polycyclic aromatic hydrocarbons (PAHs) were determined using the HSR-PSD with low density polyethylene (LDPE) sheets as a passive sampler. Furthermore, dissolved concentrations (Cdissolved) of PAHs in seawater were also obtained from high volume water sampling as a conventional method to account for actual bioavailability. When the LDPE sheets were rotated in the HSR-PSD at 900 rpm, PAHs with log KOW 3.4 ~ 5.2 were equilibrated between the LDPE and water in 5 hours. Although the high molecular weight PAHs with log KOW 5.6 ~ 6.8 was expected to be 2 to 30 days to reach the equilibrium, the Cfree of the PAHs at equilibrium could be corrected using performance reference compounds in 5 hours. Meanwhile, the total Cfree of PAHs were from 0.32 to 1.2 ng/L, which were higher than reported values in other oceans, but lower than in coastal water such as estuary, harbor, or shore. A bioavailability from the detected PAHs was highest at the sampling line near the dumping site of the Yellow Sea. Predicted residual concentrations in biota were relatively higher in offshore including the dumping site than in coastal regions.

주제어

표/그림 (5)

그림 Fig. 1. Sampling lines in the Yellow Sea and the South Sea of Korea. Yellow dots mean retrieval sites of the samples (LDPE, XAD-2 resin, and GF/F). KCC: Korean coastal current; YSWC: Yellow Sea warm current; JWC: Jeju warm current.
그림 Fig. 2. Expected equilibrium time (4t_1/2) (days) of HSR-PSD for log K_OW.
그림 Fig. 3. Freely dissolved (A), dissolved (B), and particulate (C) concentrations of PAHs for 8 lines. Right y-axis means the contribution of eight low molecular weight (LMW) PAHs to total 16 PAHs.
표 Table 1. Freely dissolved PAH levels in various regions
$Fig. 4. Bioavailable fractions (%) of 6PAHs (left) and predicted PAH concentrations in biota (C<sub>biota,pred</sub>, ng/kg lipid) (right) in each sampling line.$ 그림 Fig. 4. Bioavailable fractions (%) of 6PAHs (left) and predicted PAH concentrations in biota (C_biota,pred, ng/kg lipid) (right) in each sampling line.

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

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용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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