Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Distribution and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Surface Sediments Near Nakdong Estuary

낙동강 하구 인근 해양 퇴적토 중의 PAHs 농도 및 발생원 산정 연구

  • Lee, Junho (Ship Practical Training Center, Pukyong National University) ;
  • Yang, Changeun (Ship Practical Training Center, Pukyong National University) ;
  • Han, Kyongsoo (Department of Spatial Information Engineering, Pukyong National University) ;
  • Lee, Taeyoon (Department of Environmental Engineering, Pukyong National University)
  • Received : 2018.08.30
  • Accepted : 2018.12.11
  • Published : 2019.01.01
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Abstract

The main objective of this study was to analyse polycyclic aromatic hydrocarbons in surface sediments obtained from near Nakdong estuary, and to estimate ecological risks of PAHs using PAHs concentrations. The main constituents of sediments were $SiO_2$, $Al_2O_3$, CaO, $Fe_2O_3$, and ignition loss of sediments ranged from 2.97% and 8.39%. Total concentrations of PAHs ranged from $128.4ng\;g^{-1}$ and $507.4ng\;g^{-1}$, and the major PAHs were 2 ring and 4 ring aromatic hydrocarbons. Each concentrations of PAHs are all below effect range low, which indicated that each PAHs in 8 studying sites show low ecological risk. From M-ERM-Q analyses, M-ERM-Q values of 8 studying sites are below 0.1 indicating low ecological risk. From source apportionment analyses, PAHs come from grass, wood, charcoal combustion for N-1 and N-7, petroleum combustion for N-5 and N-6, petroleum pollution for N-2, N-3, N-4, N-8.

본 연구는 낙동강 하구 인근의 해양퇴적토에 포함된 PAHs의 농도를 분석하여 퇴적토의 생태학적 위해성을 평가하고자 하였다. 퇴적토의 주성분은 $SiO_2$, $Al_2O_3$, CaO, $Fe_2O_3$였으며, 강열감량은 2.97%에서 8.39%의 분포를 보였다. 총 PAHs의 농도는 $128.4ng\;g^{-1}$에서 $507.4ng\;g^{-1}$의 범위를 가졌으며 2고리와 4고리 형태의 PAHs로 주로 구성이 되어있었다. 8개 지역의 각각의 PAHs의 농도는 모두 ERL 이하로 생태학적 위해성은 낮은 것으로 판단되었다. 지역별 PAHs의 생태학적 위해성 평가는 M-ERM-Q를 사용하여 이루어졌고, 계산 값 모두 0.1 이하로 생태학적 위해성은 낮음으로 분류되었다. 발생원 분석을 통해 각 지역의 PAHs의 발생원은 N-1과 N-7은 풀, 나무, 석탄 등의 연소이며, N-5와 N-6는 석유연소, N-2, N-3, N-4, N-8은 석유오염인 것으로 판단되었다.

Keywords

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Fig. 1. Map showing the sampling sites of near Nakdong river estuary

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Fig. 2. Total 16 PAHs concentrations (a) and ratio of ring size for 16 PAHs (b) in the sediments obtained from Nakdong estuary

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Fig. 3. Spatial distribution of M-ERM-Q in the surface sediments of Nakdong estuary

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Fig. 4. Source apportionment of PAHs contained in surface sediments of Nakdong estuary

Table 1. Description of 16 PAHs

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Table 2. Determination for sources of PAHs using different ratios of PAHs

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Table 3. Results of oxides and ignition loss of sediments obtained from Nakdong estuary (wt, %)

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Table 4. Concentrations of 16 PAHs (ng gd.w) in the surface sediments from Nakdong estuary and related toxicity guidelines

HJHGC7_2019_v20n1_5_t0004.png 이미지

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