• 환경생물
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• 제27권4호
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• pp.353-362
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• 2009

This study attempted to compare the litter decomposition rate of Arundinella hirta and Miscanthus sinensis var. purpurascens which collected from serpentine soil acting potentially toxic concentration of heavy metals and non-serpentine soil by using the microcosm method for 192 days under constant humidity and $23^{\circ}C$. The contents of Ni, Fe, Mg and Cr in the serpentine and nonserpentine soil originated litter showed high differences between them. The litter samples from serpentine site have lower C/N than non-serpentine litter, but the soluble carbohydrate content was shown almost similar between two plant litter. The mass loss rates of leaf litter from serpentine area were slower than those from non-serpentine site. During the experimental period, the remained dry weight of A. hirta and M. sinensis var. purpurascens litter collected from serpentine site were 64.7%, 65.0% of initial dry weight and litter samples from non-serpentine site showed 54.2%, 50.7%, respectively. K and Na were leached rapidly at the initial decomposition periods, but Ca showed immobilization and other metal elements reserved at the decomposing litter for a long time. The decomposing A. hirta litter from non-serpentine soil showed higher values of $CO_2$ evolution, microbial biomass-C, and microbial biomass-N than those in serpentine soil originated litter acting nutrient stresses and exhibited rapid decay rate. The microbial biomass and microbial respiration of decaying litter were positively correlated with litter decomposition rate, and these relationships showed more rapid slope in non-serpentine soil originated litter than that in serpentine soil.

• 한국수소및신에너지학회논문집
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• 제20권5호
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• pp.447-454
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• 2009

Electrolyzed reduced water was known as an alkaline solvent than piped water, natural water and mineral water etc. By means of reduction property, electrolyzed reduced water could dissolve a solute than other kinds of water without chemicals. In this study, serpentine dissolution in electrolyzed reduced water was investigated as a novel pre-treatment of serpentine which was a minerals for carbon dioxide sequestration. The elements (Ca, Si, Mg etc.) of serpentine were dissolved rapidly at early in the dissolvation then after some minutes the solubilities of serpentine elements showed stable state without abrupt changes. In spite of serpentine elements dissolution, chemical bondings and crystallographic structure of serpentine were not changed. It was explained that the dissolution mechanism of serpentine occurred from surface in electrolyzed reduced water and bulk structure sustained without collapse.

• 환경생물
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• 제24권4호
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• pp.408-415
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• 2006

Serpentines soil have high values of magnesium and low values of calcium, and are usually deficient in N and P, but rich in iron, Ni, silicates. We investigated serpentine soil properties and measured the content of nutrient elements and heavy metals in shoots and root of plant species which were in common at serpentine and non-serpentine areas in Andong, Korea. The soils showed higher pH value above 6.9. The contents of Ni, Cr, Fe and Mg of serpentine soils exhibited 77, 27, 5.5 and 12.5 times more than in non-serpentine soils, respectively. The content of Na was almost same but K was two times higher in non-serpentine soil, compared with serpentine soil. The contents of nutrient element such as K, Ca, Na and P in serpentine plants did not show conspicuous differences with non-serpentine plants. On the other hand, the concentrations of Ni, Cr, Fe, Mg and Mg/Ca were very high in plant on serpentine area. The all plant species collected at the serpentine site were bodenvag plants, which are not restricted to a specific type of substrate. By the plant species and parts of plant tissues, the absorption levels and patterns showed high variation and were species-specific. Carex lanceolata, Lysimachia clethroides and Cynanchum paniculatum contained much chromium and Eupatorium chinense and C. paniculatum exhibited high contents of Ni. In leaf tissue, C. lanceolata, Rubus parvifolius, Festuca ovina, Quercus serrata, and L. clethroides took comparatively large amount of Cr in serpentine area. E. chinense contained large amount of Ni, Cr and Fe in a leaf tissue. The stem of Galium verum, Juniperus rigida included high amount of Cr, Ni and Fe. And C. paniculatum absorbed large amount of Ni and Cr in the stem.

• 한국조경학회지
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• 제30권3호
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• pp.86-93
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• 2002

The objectives of this research were to investigate the effect of serpentine as a new soil conditioner for growth of turfgrass. To achieve the goal, pure sand or mixtures of sand and serpentine with various ratios were tested for soil physical properties and the growth effects of perennial ryegrass and zoysiagrass growth were compared. Major results of this research are summarized as follows; 1) Hydraulic conductivity of 10~30% serpentine mixtures were observed within the range of 1010~901mm/h which is good for USGA recommendation. Experimental results of pH and EC for various mixtures indicated that the 10% serpentine mixture was the most suitable for turfgrass growth. 2) Perennial ryegass treated with 10% serpentine mixture showed the highest visual quality(p<0.01) among all treatments. And serpentine treatment was more effective to improve visual quality of perennial ryegrass than that of zoysiagrass. The treatment of 10% serpentine had better visual qualities than that of 20% in both of zoysiagrass and perennial ryegrass. Treatment with the right amount of serpentine extends green period for one to two weeks during early winter in both zoysiagrass and perennial ryegrass. 3) In perennial ryegrass, the treatment of 10% serpentine resulted in an increase of total dry weight compare with those of zeolite or barley stone, and also dramatically promoted the dry weight by 15% compared with sand 100%(control). Total dry weight of zoysiagrass treated with 10% serpentine was 9％ higher than that of san. These results indicated that serpentine can be a good soil conditioner for both zoysiagrass and perennial ryegrass when it is blended with sand within a range of 10 to 20% by volume.

• 한국수소및신에너지학회논문집
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• 제18권3호
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• pp.301-308
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• 2007

Silicate mineral serpentine with magnesium and calcium was selected as a mineral carbonation mediators for carbon dioxide storage. Serpentine has various metallic elements as an oxides form of magnesium, iron, calcium, aluminium etc. Magnesium and calcium could be carbonation salt preferentially than other metal component within serpentine. Systemic thermochemical treatment for serpentine could change physicochemical properties like a surface area and pore dimensions. Due to the rapid chemical reaction rate depended on dimensional values, carbonation formation could determined by surface property change of thermochemical treated serpentine.

• 융복합기술연구소 논문집
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• 제6권1호
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• pp.37-41
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• 2016

The serpentine internal passage is located in turbine blade and it shows the variety heat transfer distribution. Especially, the Coriolis force, which is induced by blade rotation, makes different heat transfer distribution of the leading and trailing surfaces of serpentine internal passage. The different heat transfer is one of the reasons why the serpentine cooling passage shows low cooling performance in the rotating condition. So, this study tried to design the advanced the serpentine passage to consideration of the Coriolis force. The design concept of advanced serpentine cooling is maximizing cooling performance using the Coriolis force. So, the flow turns from leading surface to trailing surface in advanced serpentine passage to match the direction of Coriolis force and rotating force. We performed numerical analysis using CFX and compared the existing and advanced serpentine internal passage. This design change is induced the high heat transfer distribution of whole advanced serpentine internal passage surfaces.

• Journal of Ecology and Environment
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• 제31권4호
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• pp.327-331
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• 2008

Serpentine soils are distributed in a small area in Korea, and generally exhibit high contents of Ni, Cr, Fe, Mn, Co and Mg. We investigated the growth of woody plants and herbs in the Andong serpentine area, Korea. Pinus densiflora and P. rigida growing on serpentine soils have high contents of Fe, Mg, Ni and Co, with contents approximately twice as high as those of non-serpentine plants. Tree species on serpentine soil also had lower ratios of tree height/DBH than trees in a control area. In greenhouse culture experiments on two bodenvag herb species, Setaria viridis and Cymbopogon tortilis, the biomass of the plants was significantly affected by soil type but not by seed origins. After 66 days, the growth of S. viridis and C. tortilis seedlings was significantly inhibited in serpentine soil, and the dry weight of each species showed significant negative correlations with soil heavy metal contents (Ni, Co and Cr). These results suggest that the growth of plants was inhibited by properties of the serpentine soil, and in particular, their high heavy metal concentration, which induced dwarfing in woody plants and reduction of total plant biomass in herbs.

• 한국환경생태학회지
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• 제24권4호
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• pp.426-435
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• 2010

본 연구는 사문암 토양의 화학적 성질과 토양미생물량 및 토양효소 등 토양의 생물학적 활성을 대조구의 비사문암 토양과 비교하고, 사문암과 비사문암에서 공통으로 서식하는 새(Arundinella hirta)와 억새(Miscanthus sinensis var. purpurascens)의 낙엽이 입지가 다른 사문암지역과 비사문암 지역에서 분해될 때 분해율의 차이가 어떻게 유발되는지 9개월 동안 야외에서 교차 실험하였다. 사문암 토양은 비사문암 토양에 비하여 높은 pH, 낮은 dehydrogenase 와 urease활성을 나타내었으며 alkaliphosphatase의 활성은 높았다. 두 토양에서 microbial biomass-C와 N의 차이는 유의하지 않았으나 사문암 토양에서 microbial biomass-N함량이 더 높게 나타나 비사문암 토양에서 보다 낮은 토양의 C/N을 나타내는 원인이 되었다. 사문암지역에서의 낙엽분해실험에서는 사문암지역에서 획득한 새와 억새 낙엽이 각각 39.8%, 38.5%의 중량감소를 보였으며, 비사문암 토양에서 획득한 낙엽은 각각 41.1%, 41.7%의 중량감소를 나타내었다. 비사문암지역에서의 낙엽분해실험에서는 사문암낙엽이 46.8%, 42.2% 그리고 비사문암낙엽은 44.8%, 37.4%의 중량감소를 각각 보였다. 이러한 결과는 중금속을 포함하는 토양의 영향보다는 낙엽의 질적 차이가 분해율에 더 큰 영향을 미쳤음을 나타내준다. 일반적으로 낮은 C/N을 갖는 낙엽이 더 빨리 분해된다는 결과와는 달리 낮은 C/N을 갖는 사문암낙엽의 분해가 느린 것은 낙엽에 포함된 중금속의 저해가 낙엽의 C/N이나 lignin/N과 같은 낙엽의 질적 차이에서 유발되는 낙엽분해의 저해보다 큰 영양을 미친다는 결과를 보여주었다. 또한 낙엽분해가 진행되는 동안 낙엽내의 Cr, Ni과 Mg, Fe의 농도는 점차 증가하였으며 이러한 경향은 사문암지역에서 현저하였다.

• 한국수소및신에너지학회논문집
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• 제16권1호
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• pp.74-81
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• 2005

The heat treatment of serpentines for mineral carbonation was studied systematically. Crystallographic, spectroscopic and thermochemical properties were investigated for serpentines before and after heat treatment. Drastic weight loss due to the removal of hydroxy groupe(-OH) occupied in serpentine crystalline was revealed after heat treatment. In XPS results, MgO was founded at heat treated serpentine powders while Mg(OH) was observed at untreated serpentine powders. Metallic oxides originated from serpentine ingredients were regenerated by heat treatment.

• Journal of Korean Neurosurgical Society
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• 제48권2호
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• pp.177-180
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• 2010

Giant serpentine aneurysms are rare and have distinct angiographic findings. The rarity, large size, complex anatomy and hemodynamic characteristics of giant serpentine aneurysms make treatment difficult. We report a case of a giant serpentine aneurysm of the right middle cerebral artery (MCA) that presented as headache. Treatment involved a superficial temporal artery (STA)-MCA bypass followed by aneurysm resection. The patient was discharged without neurological deficits, and early and late follow-up angiography disclosed successful removal of the aneurysm and a patent bypass graft. We conclude that STA-MCA bypass and aneurysm excision is a successful treatment method for a giant serpentine aneurysm.