• 융합정보논문지
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• 제11권8호
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• pp.201-206
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• 2021

본 연구 목적은 염화제일철(FeCl2)의 세포독성과 석잠풀(SJ) 추출물의 항산화 효과 및 FeCl2의 독성을 산화적 손상 측면에서 조사하였다. 이를 위해, 세포 생존율을 비롯한 과산소음이온(SAR)-소거능과 슈퍼옥사이드(SOD)-유사 활성능을 분석하였다. 본 연구에서 FeCl2는 처리 농도에 비례하여 유의한 세포 생존율의 감소를 보였으며, 중간 독성으로 나타났다. 또한, caffeic acid는 FeCl2로 감소 된 세포 생존율에 대해 유의한 증가를 보였다. FeCl2의 독성에 대한 SJ 추출물의 처리는 세포 생존율의 유의한 증가와 함께 SAR-소거 능과 SOD-유사 활성 능과 같은 항산화 효과를 보였다. 결론적으로, SJ 추출물과 같은 천연소재는 항산화제와 같은 대체물질 개발에 있어 기초자료로서의 활용적 가치가 클 것으로 생각된다.

• 식물병연구
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• 제29권1호
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• pp.82-87
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• 2023

Exogenous ferrous chloride (FeCl₂) suppressed in vitro growth of Ralstonia pseudosolanacearum, causing bacteria for tomato bacterial wilt. More than 50 μM of FeCl₂ reduced the in vitro bacterial growth in dosedependent manners. Two to 200 μM of FeCl₂ did not affect the fresh weight of detached tomato leaves at 3 and 5 days after the petiole dipping without the bacterial inoculation. The bacterial wilt of the detached tomato leaves was evaluated by inoculating two different inoculum densities of R. pseudosolanacearum (10⁵ and 10⁷ cfu/ml) in the presence of FeCl₂. Bacterial wilt in the detached leaves by 10⁵ cfu/ml was efficiently attenuated by 10-200 μM of FeCl₂ at 3 and 5 days post-inoculation (dpi), but bacterial wilt by 10⁷ cfu/ml was only reduced by 200 μM of FeCl₂ at 3 and 5 dpi. These results suggest that iron nutrients can be included in the integrated disease management of tomato bacterial wilt.

• Bulletin of the Korean Chemical Society
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• 제32권9호
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• pp.3429-3432
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• 2011

Distribution diagram of $FeCl_2$ in HCl solution indicated that $FeCl^+$ was a predominant species in strong HCl solution up to 10 M. Solvent extraction of $FeCl_2$ has been performed in the HCl concentration range from 5 to 9 M by using Alamine336 as an extractant. Interaction parameter of $FeCl^+$ for Bromley equation was estimated from our solvent extraction data. This parameter thus obtained in our study can be employed in calculating the activity coefficient of $FeCl^+$ in high concentration of HCl.

• 한국환경과학회지
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• 제19권11호
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• pp.1385-1390
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• 2010

Repeated additions of untreated slurry to soil affected ecology and caused high levels of heavy metal in soil and ground water. The objective of this study was to evaluate heavy metal from hanwoo slurry with ferrous sulfate ($FeSO_4{\cdot}7H_2O$), aluminum sulfate [$Al_2(SO_4)_3{\cdot}14H_2O$, alum] and aluminum chloride ($AlCl_3{\cdot}6H_2O$) as a way to improve environmental management in hanwoo industry. The treatment rates, which were incorporated totally within the hanwoo slurry, were 1.0 g and 1.5 g of ferrous sulfate, alum and aluminum chloride/25 g of hanwoo slurry. The various rates of chemical additives significantly increased dry matter (9.98~13.94%) and decreased pH (3.48~6.52) compared with the controls. The use of chemical additives decreased Fe (11~29%), Al (7~12%), Zn (13~36%), and Cu (4~32%) contents, except for Fe in hanwoo slurry with ferrous sulfate and Al in hanwoo slurry with alum and aluminum chloride. In addition, the reduction in heavy metal should be associated with reduction in pH. In conclusion, the results of this study suggest that alum and aluminum chloride additives at rate of 1.5 g were cost-effective management practice that significantly reduces heavy metal from hanwoo slurry, while it may be improved environmental management.

• Bulletin of the Korean Chemical Society
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• 제18권12호
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• pp.1269-1273
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• 1997

The system which employs iron, palladium, molecular oxygen and hydrogen as a model mono-oxygenase, has been investigated to develop a new method for selective cyclohexane oxidation uner mild conditions. This system provides much higher yield and selectivity for the formation of cyclohexanol and cyclohexanone compared to that of the existing industrial method. When the catalytic system, FeCl2-Pd/alumina, was employed, the oxidation system required acetone as a solvent to be efficient and acidifying the solvent by a little addition of acetic acid or HCl made the system more efficient. The Pd catalyst was recyclable without a significant deactivation but the recycling of ferrous chloride showed the decrease in the activity. On the other hand, the heterogeneous catalytic system, Pd/Fe2O3 could be recovered easily and reused after drying treatment.

• 한국산학기술학회논문지
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• 제14권1호
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• pp.493-498
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• 2013

합성 고분자 화합물의 생산과 ethanolamine(ETA, 원자력발전소에서 사용하는 pH 조절제)는 수질을 오염시키는 폐수를 발생한다. 본 연구는 유기물에 의해 유발된 COD를 감소시키기 위한 물리 화학적 처리법과 처리 약품을 개발하였다. $FeCl_2$와 $MgCl_2$를 1/1로 혼합하여 혼합응집제를 사용함이 COD 제거효율이 가장 좋은 결과를 얻었다. 유기물을 함유한 폐수처리에 복합응집제를 주입함으로써 COD제거율이 80%이상으로 나타났다.

• Corrosion Science and Technology
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• 제4권2호
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• pp.45-50
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• 2005

A 3% NaCl solution of 1 $dm^3$ circulated with 1.5 $dm^3/min$ by a pump for 24 h in the presence of magnetic field. An iron plate immersed in a $100cm^3$ of test solution for 24 h. The rest potential and pH on surface fixed after 3 h. Containing 0~120 ppm of Fe(II) ion, the dissolution in the magnetically treated solution rose comparing with that in the non-magnetically treated solution. The dissolution amount reached to maximum at 50 ppm, then fixed in the non-magnetically treated solution. When Fe(II) ion existed in the magnetically treated solution, dissolution accelerated a little. In the non-magnetic treated solution containing 10~125 ppm of Fe(III) ion existed, the dissolution accelerated. The dissolution amounts reached to maximum at 50 ppm, then decreased from maximum value. In the magnetically treated solution, the dissolution amounts reached to minimum until 50 ppm, then increased from minimum value. The dissolution amounts affected larger with increasing of magnetic flux density. Fe(II), Fe(III) ions and magnetic treatment affected to formation of $Fe(OH)_2$ and/or $Fe_3O_4$ films. The magnetically treated effects memorized about one month.

• Nuclear Engineering and Technology
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• 제8권2호
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• pp.89-99
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• 1976

Polyvinyl Chloride 섬유에 Acrylic acid (AA)를 방사선을 이용하여 Graft 중합 반응시킬 때 Homopolymer의 방지제인 Ferrous, Ferric, Cupric salt을 첨가시켰다. 방사선 선원으로서는 Co-60의 ${\gamma}$-선 또는 Van de Graaff 가속기를 사용하였으며 조사방법으로는 상호조사법을 이용하였다. Graft 중합반응과 Homopolymerization은 반응계에 첨가시킨 Cation에 의해서 영향을 받았으며 그 효율은 $Cu^{2+}$>$Fe^{2+}$>$Fe^{3+}$의 순서였다. Graft 중합반응속도는 방사선 선량율이 $8.5\times10^3$부터 $1.4\times10^{5}$rad/hr 사이에서 선량율의 0.76중에 비례하였고, Craft 중합반응에 대한 활성화 에너지는 $25^{\circ}$부터 $75^{\circ}C$ 사이에서 6.1 Kcal/mole이었다. 이 때 중합반응 용액은 AA-$H_2O$-$(CH_2Cl)_2$로서 Homopolymer inhibitor의 농도는 $4\times10^{-3}$ mole/1이었다. Graft율은 총선량과 선량율이 클 때 증가하였거나 또는 Polymer 팽윤제인 Ethylene dichloride가 monomer 혼합용액과 포화되었을 때 증가되었다. Acrylic acid가 Craft된 Polyvinyl Chloride 섬유는 흡습율, 열수축성, 용융성이 크게 증진되었고 Tensile properties는 original과 별차이를 나타내지 않았다.

• Corrosion Science and Technology
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• 제5권2호
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• pp.39-44
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• 2006

The dissolution amount of Zn plate was $0.058mg/cm^2$ in the non-magnetically treated solution, and was $0.059mg/cm^2$ in the magnetically treated solution after 24 hours of immersion. The magnetic treatment had no effect to corrosion of Zn plate as pH on surface was not recognized the difference. The addition of Zn(II) ion in the solution was prepared to the effects of corrosion and dissolution of Fe. The regularity was not obtained the effect of the magnetic treatment on the dissolution of Fe plate.

• 대한환경공학회지
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• 제22권5호
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• pp.811-817
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• 2000

본 연구에서는 생물학적으로 질산화/탈질 처리한 침출수와 기존 라군 처리한 침출수를 대상으로 응집과 펜톤산화시 최적 처리조건을 탐색하고, 펜톤산화시 알카리도가 COD 처리효율에 미치는 영향을 조사하였다. Jar-Tester를 이용한 응집처리시 염화제이철($FeCl_3$)의 적정 투입농도는 약 $1500mgFe^{3+}/L$로 조사되었으며, 이때 $COD_{Cr}$은 약 55%, $COD_{Mn}$은 약 64%의 처리효율을 나타냈다. 응집처리후($1,500mgFe^{3+}/L$) 펜톤처리시 약품투입비는 $Fe^{2+}/H_2O_2$의 비 1.5에서 COD 처리효율은 약 80%로 최대 처리효율을 나타냈으며, 이때 최적 약품투입농도는 철염 $600mgFe^{2+}/L$, 과산화수소수 $400mgH_2O_2/L$이었다. 펜톤 산화시 유입수의 알카리도가 증가됨에 따라 COD 처리효율이 저하되었다.