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이병우(Byeongwoo Lee),이병천(Byoungcheun Lee),김필제(Pilje Kim),윤효정(Hyojung Yoon) 한국환경보건학회 2020 한국환경보건학회지 Vol.46 No.1
Objectives: This study intends to evaluate the ecological risk of lead (Pb), arsenic (As), and their compounds according to the 2010 action plan on inventory and management for national priority chemicals and provide calculations of risks to the environment. By doing so, we aim to inform risk management measures for the target chemicals. Methods: We conducted species sensitivity distribution (SSD) analysis using the collected ecotoxicity data and obtained predicted no effect concentrations (PNECs) for the in-water environment using a hazardous concentration of 5% (HC5) protective of most species (95%) in the environment. Based on the calculated PNECs for aquatic organisms, PNEC values for soil and sediment were calculated using the partition coefficient. We also calculated predicted exposure concentration (PEC) from nation-wide environmental monitoring data and then the hazard quotient (HQ) was calculated using PNEC for environmental media. Results: Ecological toxicity data was categorized into five groups and five species for Pb and four groups and four species for As. Based on the HC5 values from SSD analysis, the PNEC value for aquatic organisms was calculated as 0.40 μg/L for Pb and 0.13 μg/L for As. PNEC values for soil and sediment calculated using a partition coefficient were 77.36 and 350.50 mg/kg for Pb and 24.20 and 112.75 mg/kg for As. The analysis of national environmental monitoring data showed that PEC values in water were 0.284 μg/L for Pb and 0.024 μg/L for As, while those in soil and sediment were respectively 45.9 and 44 mg/kg for Pb, and 11.40 and 19.80 mg/kg for As. Conclusions: HQs of Pb and As were 0.70 and 0.18 in water, while those in soil and sediment were 0.59 and 0.13 for Pb and 0.47 and 0.18 for As. With HQs <1 of lead and arsenic in the environment, their ecological risk levels are found to be low.
퇴적층의 온도별 배양에 따른 조류군집 형성과 이취미물질 발생 특성
김용진 ( Yongjin Kim ),윤석제 ( Seokjea Youn ),김헌년 ( Hunnyun Kim ),황문영 ( Moonyoung Hwang ),박진락 ( Jinrak Park ),이병천 ( Byoungcheun Lee ),이재관 ( Jaekwan Lee ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.5
We analyzed the formation of phytoplankton community and the occurences of odorus compound from benthic cyanobacteria in North, South Han-River, Paldang-Lake and Kyeongan-Stream sediments. Sediments were incubated in different water temperature. Akinetes were found (0~500 cells/g) with the highest number on sediment in Yangsoo railroad bridge (YC). The result showed that Anabaena ranged between 0.02~0.53×103 cells/mL in Sambong (SB), YC, Mukhyen-Stream (MS), Paldang-Lake (P2) and Kyeongan-Stream (KK). The total 68 taxa of phytoplankton were observed during the incubation period. A standing crop of phytoplankton was in the range of 0.13~8.97×103 cells/mL and Microcystis appeared in SB, YC, P2 and KK sites with 20~25°C temperature. In South Han-River (P3), Oscillatoria tenuis was dominant at 25°C temperature. The concentration of geosmin was the highest in SB-15°C (25.5 ng/L), and the concentration of 2-MIB was the highest in P3-25°C (286.8 ng/L). Odorous compounds were detected in all the temperature conditions from each site. Our results indicate that the dominant benthic cyanobacteria (O. tenuis, O. limosa, Phormidium tenue and Pseudanabaena limnetica) have high correlation with the occurrence odorous compounds and 2-MIB.