• Advances in nano research
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• 제12권6호
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• pp.549-566
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• 2022

Mining of ore minerals (sfalerite, cinnabar, and chalcopyrite) from the old mine has led in significant environmental effects as contamination of soils and plants and acidification of water. Also, nanoparticles (NP) have obtained global importance because of their widespread usage in daily life, unique properties, and rapid development in the field of nanotechnology. Regarding their usage in various fields, it is suggested that soil is the final environmental sink for NPs. Nanoparticles with excessive reactivity and deliverability may be carried out as amendments to enhance soil quality, mitigate soil contaminations, make certain secure land-software of the traditional change substances and enhance soil erosion control. Meanwhile, there's no record on the usage of Nano superior substances for mine soil reclamation. In this study, five soil specimens have been tested at 4 sites inside the region of mine (<100 m) to study zeolites, and iron sulfide nanoparticles. Also, through using Artificial Neural Network (ANN) and Extreme Learning Machine (ELM), this study has tried to appropriately estimate the mechanical properties of soil under the effect of these Nano particles. Considering the RMSE and R2 values, Zeolite Nano materials could enhance the mine soil fine through increasing the clay-silt fractions, increasing the water holding capacity, removing toxins and improving nutrient levels. Also, adding iron sulfide minerals to the soils would possibly exacerbate the soil acidity problems at a mining site.

• 한국토양비료학회지
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• 제43권5호
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• pp.650-658
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• 2010

시설재배지의 경우 휴작기간 동안 녹비작물의 활용가능성이 높을 것으로 판단된다. 본 연구는 녹비작물이 시설재배지에서의 양분공급 및 토양질 개선에 미치는 영향을 평가하고자 두과 (헤어리베치, 크림손클로버) 및 화본과 (호밀, 수수, 수단그라스) 녹비작물을 재배 후 토양과 혼합하였으며, 무기질소 공급능과 생물적 지표로써 토양 탄수화물, 미생물활성 및 부식함량의 경시적 변화를 측정하였다. 관행구의 무기태 질소함량은 전 기간 비슷한 수준을 유지하였으나 녹비작물을 처리한 토양에서는 토양처리 후 4주까지 무기태질소 함량이 지속적으로 증가하였고, 특히 수단그라스에서 무기태질소 함량이 두드러지게 증가하였다. 녹비작물 처리 후 토양 중 수용성 당은 두과 녹비작물 처리 후 서서히 증가하기 시작하여 7주 경에 가장 높았으며 이후 서서히 감소하는 경향이 나타났다. 반면 화본과 녹비작물 처리 후 수용성 당이 빠르게 증가하여 처리 후 4주 경에 최대치에 도달한 후 감소하는 양상이 나타났다. 토양 내의 부식산 (humicacid)은 아무것도 첨가하지 않은 관행구와 녹비처리 초기에는 비슷한 수준으로 낮았으나 녹비처리 후 4주 정도 시간이 경과하면서 녹비작물의 부숙에 의해 형성된 부식산이 점점 증가하는 것을 확인할 수 있었다. 또한 양이온과 결합하여 물에 잘 용해되는 염을 만드는 fulvic 산에서도 작물 간 차이는 있었지만 부식산의 함량 변화와 비슷한 경향이었다.

• Journal of Ecology and Environment
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• 제42권4호
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• pp.163-173
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• 2018

Background: Deforestation and degradation are currently affecting the ecosystem services of forests. Among the ecosystem services affected by deforestation and degradation are the amount of soil organic carbon (SOC) and total nitrogen (TN) stored in forest soils which have greater impacts in global climate change. This study aimed at examining the amount of SOC and TN in the forest fragments which were separated from the continuous tracts of forests of Jibat and Chillimo through fragmentation processes over four decades. Methods: We have sampled soils from 15 forest fragments of Chillimo and Jibat in the central highlands of Ethiopia. The soil samples obtained in two separate soil depths (0-30 and 30-60 cm) were bulked, dried, and sieved for analysis. Results: Our results have shown that the two sites (Jibat and Chillimo forest fragments) differed in their SOC and TN contents. While the values for Jibat were found to be 29.89 Mg/ha of SOC and 2.84 Mg/ha for TN, it was 14. 06 Mg/ha of SOC and 1.40 Mg/ha for TN for Chillimo. When all forest fragment soil samples were bulked together, Jibat site had twice the value of SOC and TN than Chillimo. When disaggregated on the basis of each fragments, there existed differences in SOC (1.86 Mg/ha and 42.15 Mg/ha) and TN (0.24 Mg/ha and 4.23 Mg/ha) values. Among the forest fragments, fragment four ($F_4$) had the highest Relative Soil Improvement Index (RSII) value of 3826.82% and fragment fifteen ($F_{15}$) had the lowest RSII value (726.87%) which indicated that the former had a better quality of soil properties than the latter. Conclusion: SOC and TN differed across sampled fragments and sites. Variations in soil properties are the reflections of inherent soil parent material, aboveground vegetation, human interferences, and other physical factors. Such differences could be very important for identifying intervention measures for restoration and enhancing ecosystem services of those fragments.

• 한국물환경학회지
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• 제27권6호
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• pp.932-937
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• 2011

Main objectives of this paper were; firstly, to explain impacts of suspended solid in the water body on the relationship between water quantity and water quality; secondly, study on the inter-relationship between organic materials, nutrients, pathogens, and suspended solids considering eco-friendly water resources. Relationship between water quality and water quantity is not easy to understand as it includes physicochemical-biological reactions and diffuse pollutions. Especially, suspended solid makes water resource management difficult. Eroded soil in the upper land transported to the downstream by water flows carrying biological and physicochemical information and sedimented in the downstream. As sediment scoured under high flow condition and environmental change, suspended solid and sediment should be emphasized for understanding the inter-relationship between water quality and water quantity. Knowledge gaps between known monitored data and management of suspended solid were identified as well for future study.

• 한국지하수토양환경학회지:지하수토양환경
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• 제22권6호
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• pp.74-84
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• 2017

Soil erosion is often extreme in Korea due to high rainfall intensities and steep slopes, and climate change has also increased the risk of erosion. Despite its significane, erosion-induced soil organic carbon (SOC) emission and water resource loss are not well understood, along with the lack of an integrated surface soil erosion protection policy. Therefore, to design adequate protection policies, land users, scientists, engineers and decision makers need proper information about surface soil and watershed properties related to greenhouse gas emission potential and water conservation capability, respectively. Assuming the total soil erosion of $346Tg\;yr^{-1}$, soil organic matter (SOM) content of 2% (58% of SOM is SOC), and mineralization rate of 20% of the displaced carbon, erosion-induced carbon emission could reach $800Gg\;C\;yr^{-1}$. Also the available water capacity of the soil was estimated to be 15.8 billion tons, which was 14 times higher than the yearly water supply demand in Seoul, Korea. Therefore, in order to prevent of soil erosion, this study proposes a three-stage plan for surface soil erosion prevention: 1) classification of soil erosion risk and scoring of surface soil quality, 2) selection of priority areas for conservation and best management practices (BMP), and 3) application of BMP and post management.

• 한국토양비료학회지
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• 제49권5호
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• pp.541-547
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• 2016

In this experiment we investigated the influence of various anions including oxalic acid encountered as solution phase in soil on the adsorption and desorption of sulfate in Chungwon Bt soil. The effect of chloride and nitrate on the adsorption of sulfate was not significant, suggesting that sulfate was better able to compete for adsorption sites at concentrations studied, in contrast to the large reduction in the amount of chloride adsorbed in the presence of sulfate. The results of competition for sorption sites between sulfate and anion showed that the simultaneous presence of two anions in solution was effective in reduction of competing anion at a maximum value of adsorption, due to the similar adsorption mechanism for anion competition. Therefore, the variation in the buffer power of the acids will produce a change in the strength and amount of adsorption and the competitive ability.

• 한국농림기상학회지
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• 제22권4호
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• pp.340-345
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• 2020

본 연구에서는 첨단 옥외환경조절시설인 SPAR 시스템의 작물 및 환경 관측 자료의 품질 관리와 보증 방법을 최초로 제시하였다. 특히 실시간 군락 CO2플럭스의 경우에는 수집되는 자료의 특성을 고려하여 이상치의 제거와 보정이 병행되어야 함을 확인하였다. 본 연구를 통해 구축된 자료 처리 방법들은 향후 SPAR 자료를 통한 작물 생육 모형 개선에 매우 중요하게 활용될 수 있을 것으로 보인다. SPAR 내 작물과 환경 관련 10분 평균 자료는 국립식량과학원 내 작물 연구 통합 정보시스템(Crop Research Information System, CRIS) 웹사이트(www2.nics.go.kr/cris)에서 이용 가능하다.

• 디지털산업정보학회논문지
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• 제7권1호
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• pp.1-9
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• 2011

In this paper, Wireless sensor network technology applied to various greenhouse agro-industry items such as horticulture and local specialty etc., we was constructed automatic control system for optimum growth environment by measuring growth status and environmental change. existing monitoring systems of greenhouse gather information about growth environment depends on the temperature. but in this system, Can be efficient collection and control of information to construct wireless sensor network by growth measurement sensor and environment monitoring sensor inside of the greenhouse. The system is consists of sensor manager for information processing, an environment database that stores information collected from sensors, the GUI of show the greenhouse status, it gather soil and environment information to soil and environment(including weather) sensors, growth measurement sensor. In addition to support that soil information service shows the temperature, moisture, EC, ph of soil to user through the interaction of obtained data and Complex Growth Environment information service for quality and productivity can prevention and response by growth disease or disaster of greenhouse agro-industry items how temperature, humidity, illumination acquiring informationin greenhouse(strawberry, ginseng). To verify the executability of the system, constructing the complex growth environment measurement system using wireless sensor network in greenhouse and we confirmed that it is can provide our optimized growth environment information.

• 환경영향평가
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• 제25권1호
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• pp.51-62
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• 2016

최근 토양자원에 대한 인식은 작물생산 뿐 아니라 우리가 살아가는 환경의 질을 좌우하는데 중요한 역할을 하고 있는 것으로 변화되고 있다. 최근 연구에서는 정책계획과 개발기본계획에 대해 각 개별계획이 가지는 고유 특성을 감안하여 토양특성에 미치는 영향에 대한 검토의 필요성이 대두되고 있다. 본 연구는 국가환경정책 및 국제협약 등 상위계획에서의 토양 세부평가 항목을 추출하여 댐건설 장기계획에 적용함으로써 향후 전략환경영향평가에 합리적으로 적용할 수 있는 방법을 도출하고자 하였다. 그 결과, 토양침식, 토양영양물질, 토양오염, 토양이동, 토양생물다양성 등에 영향을 주는 것으로 나타났으며, 이들 세부 항목들은 기존 환경영향평가서상의 항목과 일정부분 중복되는 것으로 나타났다. 따라서, 향후 전략환경영향평가시 평가항목간의 합리적 연계방안에 대한 추가연구가 필요할 것으로 보인다.

• 한국산림과학회지
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• 제90권6호
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• pp.774-780
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• 2001

경기도 광릉 중부임업시험장내 임목밀도와 지위가 다른 31년생 리기다소나무임분올 대상으로 3개의 $20{\times}10m$ 조사구를 선정하고 5년 동안(1997~2001) 각 부위별 탄소량 및 탄소 년 증가량을 조사하였다. 각 부위별 탄소함량은 잎>가지>수피>줄기>임상>토양 0~15cm>토양 15~30cm순 이었으며 탄소저장량 및 년 증가량은 임목밀도와 지위에 따라 차이가 있는 것으로 나타났다. 유사한 임목밀도의 경우 지위가 높은 지역이 탄소저장량과 증가량이 높았으며 유사한 지위의 경우 임목밀도에 의해 탄소저장량 및 년 증가량이 차이를 보이고 있다. 조사된 임분의 임목뿌리를 제외한 리기다소나무임분의 총탄소 저장량은 140,600kgC/ha으로 임목 61%, 토양 31%, 임상 8%로 나타났다. 고사목이 많이 발생하였던 2001년도를 제외한 년 평균 탄소 증가량은 3,233kgC/ha/yr로 줄기>가지>수피>잎 순이었다. 31년생 리기다소나무임분의 탄소저장량 및 년 증가량 변화를 조사한 결과 유사한 지위에서는 임목밀도가 높은 것이 지위에 차이가 날때는 임목밀도 조절에 의한 생장량 증가가 탄소흡수능력을 증진 할 수 있을 가능성을 시사한다.