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토양 중 중금속의 식물유효도 평가를 위한 단일추출법 비교
서병환 ( Byoung Hwan Seo ),임가희 ( Ga Hee Lim ),김계훈 ( Kye Hoon Kim ),김장억 ( Jang Eok Kim ),허장현 ( Jang Hyun Hur ),김원일 ( Won Il Kim ),김권래 ( Kwon Rae Kim ) 한국환경농학회 2013 한국환경농학회지 Vol.32 No.3
BACKGROUND: Consensus of heavy metal phytoavailability in soils needs to be introduced for soil management protocols in relation to safer food production in the contaminated agricultural soils. For this, setting up the method for evaluation of metal phytoavailability in soil is an essential prerequisite. METHODS AND RESULTS: The current study was carried to select a proper single extraction method for determination of phytoavailable metal concentration in soil. Two extraction methods were examined including 1 M NH4NO3 extraction and 0.01 M Ca(NO3)2 extraction methods using 142 soil samples collected from the agricultural soils nearby abandoned mining area in Korea. Corelation analysis was conducted between phytoavailable metal concentrations and soil properties potentially influencing on the metal phytoavailability. Both methods showed similar significance (p<0.001) in correlation with soil properties such as soil pH. However, higher correlation coefficients between phytoavailable metal concentrations and soil properties were observed when used Ca(NO3)2 extraction rather than using NH4NO3 extraction. CONCLUSION(S): It appeared that 0.01 M Ca(NO3)2 extraction was better option for determination of phytoavailable metals in soils and further study to test the efficiency of this method is required in combination with plant uptake.
05 포스터 발표 : 토양 환경 분야(PS) ; PS-01 : 도라지 재배 토양의 이화학적 특성 및 중금속 농도 분포와 이에 따른 도라지 내 중금속 농도
배준식 ( Jun Sik Bae ),서병환 ( Byoung Hwan Seo ),김권래 ( Kwon Rae Kim ) 한국환경농학회 2014 한국환경농학회 학술대회집 Vol.2014 No.-
Soil properties and heavy metal (HM) concentrations in the field soils where balloon flowers ( Platycodon grandiflorum, BF) were cultivated, were investigated together with HM (Cd, Cu, Pb, and Zn) accumulation by the BF roots. Basically, in most soils examined (51-97% among 65 samples), the chemical properties including soil pH, organic matter, available-P, and exchangeable cation contents appeared to be lower than the optimal ranges for balloon flower cultivation. There were no samples exceeding the standard limits for HM in soils. Instead, the total HM concentration levels in soils appeared to be maintained at around background levels for general soil in Korea. This implied that the elevated HM accumulation in the soils caused by any possible input sources was unlikely. Even though the BF cultivated soils were not contaminated by HM, it was appeared that substantial amount of Cd was accumulated in BF roots with 1.5% and 35% roots samples exceeding the standard limits legislated for BF root (0.81 mg kg-1DW) and herbal plants (0.3mgkg-1DW), respectively. This implied that the soil HM standard limits based on the total concentration does not reflect well the metal accumulation by plants and also it is likely that the Cd standard limits for BF and herbal plants is too restrict.