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용액의 이온강도와 종류에 따른 토양 중금속 추출성 및 작물 흡수와의 상관성
류지혁 ( Ji Hyock Yoo ),김원일 ( Won Il Kim ),노현명 ( Hyun Myung Noh ),김린환 ( Lin Hwan Kim ),( Anitha Kunhikrishnan ),김지영 ( Ji Young Kim ),김두호 ( Doo Ho Kim ) 한국환경농학회 2013 한국환경농학회 학술대회집 Vol.2013 No.-
This study was conducted to investigated the extractability of trace metals (Cd, Pb, Cu, Zn and Ba) in polluted soils depending on ionic strength of dilute salt solutions, the kinds of dilute acid solutions and relationship between metal content in soils and the content in crop. We used 5 different upland soils polluted mainly with Pb and the ranges of Cd, Pb, Cu, Zn and Ba content were 0.1-0.5, 41.5-271, 10.8-82.5, 26-110 and 15.7-89.3 mg/kg, respectively. To determine directly available metal content to plant, 0.01 M and 0.002 M Ca(NO3)2 solutions were used. The Cd, Pb, Zn and Ba content extractred with 0.01 M Ca(NO3)2 solution were 1-5.5 times higher than that of 0.002 M Ca(NO3)2 extraction, however, Cu content from 0.01 M Ca(NO3)2 extraction was only 70-80% of 0.002 M Ca(NO3)2 extraction, showing no effect of different ionic strength on Cu extractability. To extract active metal pool in soils, two kinds of dilute acid solutions were used. The solutions were 0.43N HNO3 used in European country including the Netherlands and 0.1 N HCl mainly used in Asian county including Korea and Japan. For Pb and Cu, the extracted content using 0.43N HNO3 were 1.7-3.4 times higher than that of 0.1 N HCl, however, the content of Cd, Zn and Ba from the two solutions showed little differences for each element. The study soils were filled in the pots and radish was grown to see correlations between extractable metal content in soils and the content in radish at harvest. The relationships between Ca(NO3)2 extractable Cd, Zn and Ba in soils and the content in radish were significant (Pearson r=0.84-0.91) irrespective of ionic strength but the relation for Cu was not significant (r=0.27). For Pb, r=0.55 in case of 0.002 M Ca(NO3)2 extraction but there was no relation for 0.01 M Ca(NO3)2 extraction. The correlation between two dilute acid extractable Ba and Ba in radish was significant (r=0.7), however, for other elements the relations were low (r≤0.45). The relationships between soil and radish were well linked with plant uptake factors (PUF) of Cd, Pb and Zn, however, a significant relation of Ba was not matched with low PUF (0.0024) suggesting that another factor might interact with Ba uptake by plant within soil-soil solution-plant system.
이지호(Ji-Ho Lee),고우리(Woo-Ri Go),Anitha Kunhikrishnan,류지혁(Ji-Hyock Yoo),김지영(Ji-Young Kim),김원일(Won-Il Kim) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.6
Heavy metal concentration as well as chemical composition were surveyed in commercial liquid pig manure to provide the basic information for mitigation research of hazardous material to agro-product. Seventy-five samples of liquid pig manure were collected and analyzed from 2009 to 2010 nationwide. Average contents of T-N, P₂O5, and K₂O were 0.29%, 0.08%, and 0.11%, respectively. The contents of heavy metals ranged from 0.001~0.083 for As, 0.001~0.108 for Cd, 0.002~0.495 for Cr, 0.07~47.8 for Cu, ND~0.005 for Hg, 0.035~1.033 for Ni, ND~0.291 for Pb, and 0.75~342.4 mg L<SUP>-1</SUP> for Zn, respectively. It was noted that among 75 samples, only four samples exceeded the Zn guideline (130 mg L<SUP>-1</SUP>) of liquid fertilizer derived from livestock manure but others were not exceeded the regulation.
연구보문 : 토양환경 ; 농작물 재배지 토양 내 비소, 납 및 카드뮴의 농산물로의 전이계수 산출
김지영 ( Ji Young Kim ),이지호 ( Ji Ho Lee ),( Anitha Kunhikrishnan ),강대원 ( Dae Won Kang ),김민지 ( Min Ji Kim ),류지혁 ( Ji Hyock Yoo ),김두호 ( Doo Ho Kim ),이영자 ( Young Ja Lee ),김원일 ( Won Il Kim ) 한국환경농학회 2012 한국환경농학회지 Vol.31 No.4
BACKGROUND: The Transfer Factor (TF) of heavy metals from soil to plant is important, because TF is an indicator of heavy metal in soils and a factor that quantifies bioavailability of heavy metals to agricultural products. This study was conducted to investigate the transfer ability of Arsenic (As), Cadmium (Cd), and Lead (Pb) from soil to agricultural products. METHODS AND RESULTS: We investigated heavy metals (As, Cd and Pb) concentrations in 9 agricultural products (rice, barely, corn, pulse, lettuce, pumpkin, apple, pear, tangerin) and soil. TF of agricultural products was evaluated based on total and HCl-extractable soil concentration of As, Cd, and Pb. Regression analysis was used to predict the relationship of total and HCl-extractable concentration with agricultural product contents of As, Cd, and Pb. The result showed that TF was investigated average 0.006∼0.309 (As), 0.002∼6.185 (Cd), 0.003∼0.602 (Pb). The mean TF value was the highest as rice 0.309 in As, lettuce 6.185, pear 0.717, rice 0.308 in Cd, lettuce 0.602, pumpkin 0.536 in Pb which were dependent on the vegetable species and cereal is showed higher than fruit-vegetables in As. CONCLUSION(S): Soil HCl-extractable concentration of As, Cd, and Pb had the larger effects on thier contents in agricultural products than total soil concentrations. We suggests that TF are served as influential factor on the prediction of uptake. Further study for uptake and accumulation mechanism of toxic metals by agricultural products will be required to assess the human health risk and need TF of more agricultural products.