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유비철석 입자 혼합 토양내 상추(Lactuca sativa L.)의 비소이온 흡수와 축적
심호영,정덕영,이교석,이동성,전대성,신지수,김수빈,조진웅 한국작물학회 2014 한국작물학회지 Vol.59 No.4
Arsenic (As) is nonessential element toxic toplants. In Korea little is not only known about the extent ofactual anthropogenic sources and inputs of arsenic to theagricultural land which plays a active role as a sink, but alsosystematic research on arsenic as an toxic element enteringthe food chain via the soil-plant pathway has not been investigatedin the fields and greenhouses besides in few places of abandonedmining sites. Therefore, it is important to focus on the effectof As-contaminated soils on As uptake and biomass productionof lettuce plants. In this study, As concentrations in the soiland accumulation of As in lettuce transferred by As uptakefrom soils were investigated. To do this, soil which was mixedwith various rates of arsenopyrite gravels containing arsenicfrom 0 to 100% was packed into a round plastic pot. Then,10 days old vegetable crops of chinese cabbage and lettuceafter germination were transplanted into a pot. Growth oflettuce was observed for four weeks with one week interval. All experiments were done by triplicate. The results showedthat the growth rates for number of leaves, width and lengthof the crop plants were retarded with increasing amount ofgravel mixed due to increasing bioavailable amount of arsenatewith increasing rate of gravel in soils. With these results, weconclude that the bioavailable amount of arsenate can influencethe growth of lettuce
심호영 ( Ho Young Shim ),이교석 ( Kyo Suk Lee ),이동성 ( Dong Sung Lee ),전대성 ( Dae Sung Jeon ),박미숙 ( Mi Suk Park ),신지수 ( Ji Su Shin ),이연경 ( Yun Koung Lee ),구지원 ( Ji Won Goo ),김수빈 ( Soo Bin Kim ),송승근 ( Seong Ge 한국환경농학회 2014 한국환경농학회지 Vol.33 No.3
BACKGROUND: Increase in application of liquid pigmanure(LPM) in agriculture as nutritional source hasbecome a social issue due to its influence on water quality. Also, proper application methods have not been developedwith respect to indigenous properties of LPM and soilphysical properties. Therefore, we conducted thisexperiment to observe the infiltration characteristics anddistribution of dissolved organic compounds of LPM insoils having different soil textures. METHODS AND RESULTS: To do this experiment, wecollected three different soils and LPM. We analyzed thephysical and chemical properties of both soils and LPM todetermine the dilution ratios of LPM. The LPM diluted to 4different ratios with distilled water was applied to the top ofsoil column. Infiltration rates were observed by time anddepth until the amount of effluent collected from the bottomof the soil columns were stabilized while maintaining thehydraulic head 3 cm above the soil column. The resultsshowed that infiltration rates increased with increasingdilution ratios in the order of sandy, loamy sand, and sandyloam> The time required to reach steady state was increasedwith decreasing sand contents clay. CONCLUSION: The size and amount of the dissolvedorganic compounds in LPM that can determine theefficiency as fertilizer and environmental problems asnonpoint pollution source in water quality have not beeninvestigated with respect to behavior and transport of themin soil. Therefore, it requires further research how we canproperly apply LPM as valuable fertilizer substitute forinorganic fertilizers.
유비철석 입자 혼합 토양내 상추(Lactuca sativa L.)의 비소이온 흡수와 축적
심호영,이교석,이동성,전대성,신지수,김수빈,조진웅,정덕영 한국작물학회 2014 Korean journal of crop science Vol.59 No.4
비소 함유 골재를 토양개량제로 사용하였을 경우 광미에 포함된 유효태 또는 광물로 존재하는 비소가 용출되어 식물 생육에 미치는 영향을 조사하기 위해 실험 한 결과를 요약 하면 다음과 같다. 1. 중세사에서 자갈크기의 유비철석 입자시료에서는 비 소가 약 95.28 mg kg-1 정도 함유된 있으나 밭토양 시 료에서는 비소가 없는 것으로 조사되었다. 2. 상추 재배토양에 함유된 양을 기준으로 생물학적 이용 가능 비소와 그리고 상추로 전이된 비소의 양의 비율 을 비교한 결과 토양으로부터 생물학적 이용 가능 비 소 형태로 전환된 비소의 비율은 최저 2.20%에서 최 대 3.31%로 조사되었다. 3. 상대적 생물학적 이용가능 비소와 상추내 비소 지수는 정의 상관관계를 보이고 있는 반면 이의 비소 지수가 증가함에 따라 상추의 엽장, 엽폭, 엽수, 생체중과 건 물중 모두 반비례로 감소하는 것으로 조사되었다. 4. 입자직경이 토양보다 큰 모래 또는 자갈크기의 비소를 포함한 자갈이 혼합량이 증가됨에 따라 식물가용수분 함량이 감소될 뿐만 아니라 상추가 자라는 동안 비소 를 포함된 유비철석입자부터 비소가 토양내로 용존되 어 작물체내로 전이기 증가되어 상추 엽장, 엽폭 엽수, 생체중, 그리고 건물중에 영향을 준 것으로 판단한다. Arsenic (As) is nonessential element toxic to plants. In Korea little is not only known about the extent of actual anthropogenic sources and inputs of arsenic to the agricultural land which plays a active role as a sink, but also systematic research on arsenic as an toxic element entering the food chain via the soil-plant pathway has not been investigated in the fields and greenhouses besides in few places of abandoned mining sites. Therefore, it is important to focus on the effect of As-contaminated soils on As uptake and biomass production of lettuce plants. In this study, As concentrations in the soil and accumulation of As in lettuce transferred by As uptake from soils were investigated. To do this, soil which was mixed with various rates of arsenopyrite gravels containing arsenic from 0 to 100% was packed into a round plastic pot. Then, 10 days old vegetable crops of chinese cabbage and lettuce after germination were transplanted into a pot. Growth of lettuce was observed for four weeks with one week interval. All experiments were done by triplicate. The results showed that the growth rates for number of leaves, width and length of the crop plants were retarded with increasing amount of gravel mixed due to increasing bioavailable amount of arsenate with increasing rate of gravel in soils. With these results, we conclude that the bioavailable amount of arsenate can influence the growth of lettuce.
The Fate and Factors Determining Arsenic Mobility of Arsenic in Soil-A Review
이교석,심호영,이동성,정덕영 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.2
Arsenic which is found in several different chemical forms and oxidation states and causes acute and chronic adverse health effects is a toxic trace element widely distributed in soils and aquifers from both geologic and anthropogenic sources. Arsenic which has a mysterious ability to change color, behavior, reactivity, and toxicity has diverse chemical behavior in the natural environment. Arsenic which has stronger ability to readily change oxidation state than nitrogen and phosphorus due to a consequence of the electronic configuration of its valence orbitals with partially filled states capable of both electron donation and acceptance although the electronegativity of arsenic is greater than that of nitrogen and similar to that of phosphorus. Arsenate (V) is the thermodynamically stable form of As under aerobic condition and interacts strongly with solid matrix. However, it has been known that adsorption and oxidation reactions of arsenite (III) which is more soluble and mobile than As(V) in soils are two important factors affecting the fate and transport of arsenic in the environment. That is, the movement of As in soils and aquifers is highly dependent on the adsorption desorption reactions in the solid phase. This article, however, focuses primarily on understanding the fate and speciation of As in soils and what fate arsenic will have after it is incorporated into soils.