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RISS 인기검색어
- 검색키워드
- 저자 : 신중두 ( Sin Jung Du ) (검색결과 2 건)
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정구복 ( Jeong Gu Bog ),김원일 ( Kim Won Il ),이종식 ( Lee Jong Sig ),신중두 ( Sin Jung Du ),김진호 ( Kim Jin Ho ),윤순강 ( Yun Sun Gang ) 한국환경농학회 2004 한국환경농학회지 Vol.23 No.1
Objectives of this study were to monitor the distribution of heavy metals, to compare extractable heavy metal with total content and to investigate the relationships between soil physico-chemical properties and heavy metals in orchard soil. sampling sites were 48 in Gyeonggi, 36 in Gangwon, 36 in Chungbuk, and 44 in Chungnam. Soils were collected form two depths, 0 to 20 and 20 to 40 cm (here after referred to as upper and lower layers) from March to May in 1998. Total contents of heavy metal in soils were analyzed by ICP-OES after acid digestion (HNO₃:HCl:H₂O₂) whereas extractable contents were measured after successive extraction of 0.1 N-HCl, 0.05 M-EDTA, and 0.005 M-DTPA. Mercury was analysed by mercury atomizer. The average contents of Cd, Cu, and Pb in the extractant with 0.1 N-HCl at upper layer were 0.080, 4.23, and 3.42 ㎎/㎏, respectively. As content in the extractant with 1 N-HCl was 0.44 ㎎/㎏, and total contents of 20, Ni, and Hg were 78.9, 16.1, and 0.052 ㎎/㎏, respectively. m e ratios of concentrations of heavy metals to threshold values (Cd 1.5, Cu 50, Pb 100, Zn 300, Ni 40, Hg 4 ㎎/㎏) in soil Environmental Conservation Act in Korea (2001) were low in the range of 1/2.5-1/76.9 in orchard soils. The ratios of extractable heavy metal to total content ranged 5.4-9.21% for Cd, 27.9-47.8% for Cu, 12.6-21.8% for Pb, 15.8-203% for Zn, 5.3 -6.3% for Nii and 0.7 -3.6% for 2n, respectively. Cu and Pb contents in 0.05 M-EDTA extractable solution were higher than those in the other extractable solution. Total contents of Cd, Ni, and Ni in soils were negatively correlated with sand content, but positively correlated with silt and clay contents. Ratios of extractable heavy metal to total content were negatively correlated with clay content, but Zn and Ni contents were positively correlated with soil pH, organic matter, and available phosphorous. Therefore, the orchard soil was safe because the heavy metal contents of orchard soil were very low as compared to its threshold value in the Soil Environmental Conservation. Act However, it need to consider the input of agricultural materials to the agricultural land for farming practices for assessment of heavy metals.
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김원일 ( Kim Won Il ),정구복 ( Jeong Gu Bog ),이종식 ( Lee Jong Sig ),김진호 ( Kim Jin Ho ),신중두 ( Sin Jung Du ),윤순강 ( Yun Sun Gang ) 한국환경농학회 2003 한국환경농학회지 Vol.22 No.3
Heavy metal contents in commercial horticultural growing media were investigated. Fifty-three samples were collected nationwide during 2000 to 2001 and heavy metals in the samples were analyzed by ICP-OES after acid digestion and 0.1 N HCl extraction. Average contents of total Cd, Cr, Cu, Ni, Pb, and Zn by acid digestion in the growing media were 0.69, 35.7, 14.9, 15.5, 12.7, and 54.8 ㎎/㎏ DW, respectively. The ranges of heavy metal in the growing media were 0-1.82, 0-259.8, 1.6-69.5, 0-60.7, 0-36.5, 12.9-124.0 ㎎/㎏ DW for Cd, Cr, Cu, Ni, Pb, and Zn, respectively. Heavy metal contents in the commercial horticultural growing media were showed lower levels than the permitted levels for quality control described by Korean Standard Analytical Method for Crowing Media. Average contents and ranges of 0.1 N HCl extractable heavy metals were 0.08 and 0-0.20 for Cd, 0.38 and 0-2.10 for Cr, 1.45 and 0-4.03 for Cu, 0.85 and 0-3.31 for Ni, 0.84 and 0-2.21 for Pb, and 30.68 and 0.18-88.45 ㎎/㎏ DW for Zn, respectively. These concentrations by 0.1 N HCl extraction showed much less levels than those of total heavy metals by acid digestion.
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