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우리나라 서남지역공업단지 인근 농경지 토양의 중금속 분포
김동진 ( Dong-jin Kim ),김민정 ( Min-jung Kim ),오동훈 ( Dong-hun Oh ),조하현 ( Ha-hyeon Jo ),황보현 ( Bo-hyun Hwang ),안병구 ( Byung-koo Ahn ),이진호 ( Jin-ho Lee ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
Main sources of heavy metal contamination in farm-land soilsmight be the metal input from near industrial complexes. The probability of heavy metal contamination in the soils hascontinuously increased because the numbers of industrial complexes near the farm-lands in Korea have markedly increased from year 1995. Therefore, we aimed to investigate the distribution of heavy metals/metalloids, including arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), mercury (Hg), and zinc (Zn), in the farm-land soils near the industrial complexes.Top (0 ~ 15 cm) and sub-soil (16 ~ 30 cm)samples were collected from the farm-lands around15 industrial complexes in the two provinces of southwestern Korea. The soil samples were air-dried and crushed to pass through a 0.149 mm (100 mesh) sieve. The selected heavy metals/mellanoids in the soils were determined by the pseudo-total aqua regia (3 HCl: 1 HNO3) digestion procedure. The metals/mellanoids in the digested solution were analyzed by an inductively coupled plasma optical emission spectrometry or by an inductively coupled plasma mass spectrometry. The pseudo-total concentrations of metals/metalloids in the soil samples ranged as follows: As (3.8~27.1 mg kg-1), Cd (0.65~3.32 mg kg-1), Cr (5.0~74.3 mg kg-1), Cu (5~81 mg kg-1), Ni (2~23 mg kg-1), Pb (25~156 mg kg-1), and Zn (22~237 mg kg-1) in the top soils; As (3.2~24.8 mg kg-1), Cd (0.72~3.33 mg kg-1), Cr (6.2~101.0 mg kg-1), Cu (2~47 mg kg-1), Ni (3~21 mg kg-1), Pb (39~189 mg kg-1), and Zn (22~254 mg kg-1) in the sub-soils. As comparing with Soil Contamination Warning Standards (SCWS), As (25 mg kg-1) , Cd (4 mg kg-1), Cu (150 mg kg-1), Hg (4 mg kg-1), Ni (100 mg kg-1), Pb (200 mg kg-1), and Zn (300 mg kg-1), only one sampling location was contaminated with As over the SCWS level. In addition, relative pollution indices (RPI) of As, Cd, Cr, Cu, Ni, Pb, and Zn were 1.2, 1.1, 1.0, 1.3, 1.0, 1.1, and 1.2 in the top-soil samples and 1.3, 1.1, 1.1, 1.4, 1.1, 1.2, and 1.3 in the sub-soil samples.