• 자원리싸이클링
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• 제20권5호
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• pp.58-63
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• 2011

Fe-EDTA를 함유한 수침목재유물 보존처리 폐수로부터 EDTA를 회수하고 재활용하기 위해 산 조절 침전 석출 기법을 이용하였다. EDTA는 문화재보존처리 분야에서 수침고목재의 흑화현상을 제거하는데 사용되어왔다. 수침목재유물은 오랜 기간 땅속에서 매장되어 토양의 Fe가 목재 내부의 타닌과 결합하여 흑색을 띄게 되며, 목재의 흑색을 제거하기 위해 고농도의 EDTA용액을 사용한다. 목재의 흑색은 Fe-EDTA착물이 형성되어 제거되며, EDTA는 pH 2.68이하에서 Fe와 분리되어 침전된다. 침전획득물과 실제 EDTA를 적외선분광분석기 (FT-IR)와 전계방사형 주사전자현미경(FE-SEM)를 이용하여 비교 분석하였다. 분석결과 pH조작 후의 침전획득물은 나트륨착체나 Fe-EDTA 형태의 착물형성이 아닌 순수한 EDTA로 확인되었다. 본 연구에서는 Fe-EDTA를 함유한 폐수에 HCI을 첨가하여 Fe$^{3+}$를 분리해 내고 강산성에서 EDTA가 석출되는 원리를 이용하여 EDTA의 재활용이 가능하다.

• 대한수의학회지
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• 제47권3호
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• pp.265-271
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• 2007

This study investigated the protective effects of ethylene glycol-bis(${\beta}$-aminoethyl ether)-N,N,N',N'-tetraacetic acid (EGTA), an extracellular calcium chelator, and ethylenediaminetetraacetic acid (EDTA), which chelates calcium and most metal ions, against carbon tetrachloride ($CCl_4$)-induced acute hepatotoxicity in mice. Mice were treated with EGTA or EDTA at a dose of 20 (low) or 100 mg/kg (high) subcutaneously 1h before $CCl_4$ administration. The mice were fasted and sacrificed 18h after $CCl_4$ treatment. Blood samples were collected from the carotid artery by decapitation under light ether anesthesia. Serum alkaline phosphatase (ALP), aspartate aminotransferase (AST), alanine aminotransferase (ALT), triglyceride (TG), and cholesterol levels were measured. Malondialdehyde (MDA) production was determined as an index of lipid peroxidation in the liver. The liver, kidneys, and spleen were weighed. We also evaluated the histopathological changes in the liver in each group. The relative weights of the liver were significantly higher in the $CCl_4$-treatment group than in the normal group, except in the high-EDTA treatment group. EGTA and EDTA treatment caused a significant decrease in serum ALP, ALT, and AST levels. Of all of the doses of EGTA and EDTA tested, the high-EDTA dose resulted in the most remarkable inhibitory action. The protective effect in the high-EDTA-treatment group was confirmed histopathologically. The low-EGTA-treatment group showed a significant decrease in serum TG and cholesterol levels. Liver MDA levels were significantly decreased in the EGTA (20 mg/kg) and EDTA (20, 100 mg/kg) groups. These results suggest that EDTA, which chelates both calcium and metal ions, confers better protection in $CCl_4$-induced acute liver damage than does EGTA, a calcium chelator.

• 한국염색가공학회지
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• 제20권2호
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• pp.9-18
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• 2008

Wool has excellent properties, such as heat retention, absorbency, and elasticity, but it has a disadvantage in washability because the fabric will felt and shrink greatly. Felting causes the interlocking of the fiber surface scales with one another. Therefore, the studies on wool finishing have been focused on shrink proofing. Precedent researches on wool shrink proofing are mostly on eco-friendly method. using enzyme. The purpose of this study is to examine the effect of L-cysteine, EDTA in papain treatment of wool fabrics. The specific contents of study are as follows. Depending on pH, temperature, treatment time, enzyme concentration and L-cysteine, EDTA concentration, weight loss, tensile strength, whiteness, SEM were examined. Each papain treatment conditions depending on L-cysteine, EDTA were optimized from these properties. Papain had very low activation without activators. The optimum conditions of papain treatment were pH 7.5, temperature $75^{\circ}C$, time 30minutes(L-cysteine), 180minutes(EDTA) and papain concentration 5%(o.w.f.). In the use of papain 5%(o.w.f.), the activators optimum concentration was L-cysteine 2%(o.w.f.), EDTA 7%(o.w.f.)

• 대한환경공학회지
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• 제30권5호
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• pp.500-506
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• 2008

토양칼럼반응조에서 Pb 오염토양(1,200 mg/kg)에 강아지풀로 식물상복원공법을 적용하였을 때 EDTA 혹은 인용출미생물(Phosphate solubilizing microorganism) 주입이 식물의 Pb 섭취 및 연직이동에 주는 영향을 연구하였다. EDTA 주입량은 Pb 오염총량과 동일한 mol수이었으며, 6회에 걸쳐 분할 주입하는 방법과 1회에 일괄적으로 처리하는 2가지 방법을 적용하였다. 그 결과 뿌리에 축적된 Pb의 농도는 control(164.7 mg/kg)에 비하여 PSM 처리구(M)는 2.6배, EDTA 분할처리구(ES)는 3.0배, EDTA 일괄처리구(E)는 3.3배가 증가하였고, 줄기에서는 control(8.1 mg/kg)에 비하여 M 처리구는 27배, ES 처리구는 37배, E 처리구 40배가 증가하였다. 뿌리로부터 지상부로 이동한 납의 비율은 control에서 0.06이지만, E 및 ES 처리구는 0.6, M 처리구는 0.5로 큰 차이가 없었다. Pb 제거량은 E 처리구가 많았고, EDTA의 연직이동은 ES 처리구에서 큰 것으로 나타나, 식물수확기 전에 EDTA를 일괄주입하는 방안이 효율적인 것으로 판명되었다. PSM 처리는 EDTA보다 Pb 제거량은 낮았지만 Pb의 식물섭취가 증가하였고, 식물의 성장 및 토양 내 미생물 활성도를 증진하는 장점이 있어 유독한 EDTA를 대체할 수 있을 것으로 판단된다.

• 산업기술연구
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• 제31권A호
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• pp.59-62
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• 2011

The demineralizing effect of chelating agents(Maleic acid solution, EDTA salts solutions; disodium-, trisodium- and tetrasodium-EDTA) on hydroxyapatite(HA) for the root canal dentin treatment was investigated. Dissolution of Ca from HA was increased with increasing immersion time in chelating solutions. Among the EDTA salts solutions, tetrasodium-EDTA was least effective in dissolving Ca out from HA, and trisodium-EDTA was the most effective. Trisodium-EDTA solutionmight be more effective in removing the smear layer compared to tetrasodium-EDTA solution.

• 한국식품영양과학회지
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• 제41권9호
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• pp.1305-1309
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• 2012

본 연구는 수확기 30일 전 CuEDTA, FeEDTA 엽면살포가 '홍로' 사과 과실의 항산화 성분 및 활성에 미치는 영향에 대해 조사하였다. 메탄올 추출물을 이용하여 항산화물질의 함량을 측정한 결과, 과피의 폴리페놀은 CuEDTA와 FeEDTA에서 1,228.6, 1,210.0 mg/100 g으로 대조구의 998.8 mg/100g보다 높은 수치를 나타내었고, 플라보노이드 함량도 CuEDTA, FeEDTA가 988.5, 847.6 mg/100 g으로 대조구 665.7 mg/100 g보다 높게 나타났다. Ascorbic acid의 함량은 FeEDTA가 47.2 mg/100 g으로 가장 높았고 CuEDTA(44.8 mg/100 g), 대조구( 40.9 mg/100 g) 순이었다. 안토시아닌은 대조구가 560.6 mg/100 g으로 CuEDTA, FeEDTA의 544.6, 542.9 mg/100 g에 비해 높았다. 항산화 활성 분석 결과, 과육은 처리구별 항산화 활성이 유의성이 인정되지 않았으나(p>0.05), 과피에서는 처리에 따라 유의적인 차이를 보였다(p<0.05). ABTS radical을 이용한 과피의 총 항산화력은 FeEDTA(1,267.5), CuEDTA(1,224.9), 대조구(1,161.1) 순으로 높은 활성을 보였으며, DPPH radical 소거능 또한 대조구의 868.7 mg AEAC/100 g에 비해 FeEDTA, CuEDTA 처리구에서 1,048.8, 1,042.7 mg AEAC/100 g으로 높았다. 하지만 환원력은 처리구간 유의성이 인정되지 않았다(p>0.05).

• 한국응용과학기술학회지
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• 제29권1호
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• pp.108-115
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• 2012

수침목재유물은 해저, 호저, 저습지등에서 발견되며 물속에서 외부로 아무런 조치 없이 나오게 되면 수축과 변형을 일으키게 된다. 따라서 보존처리는 목재내부의 물을 화학약품과 치환하고 강도와 치수의 안정화를 이루는 것이다. 이중 EDTA와 PEG는 수침목재유물 보존처리에 가장 많이 사용되는 약품중 하나이다. EDTA는 발굴출토된 목재의 흑화현상의 원인인 타닌산제2철에서 Fe-EDTA의 형태로 흑화현상을 제거한다. 보존처리 후 발생하는 폐 EDTA 용액으로부터 HCl을 첨가하여 Fe-EDTA에서 $Fe^{3+}$를 분리해 내고 강산성에서 EDTA가 석출되는 원리를 이용하여 EDTA의 침전물을 획득하여 재활용하였다. PEG는 수침목재유물의 강화처리에 사용되며 목재 내에서 추출되는 착색유기물에 의해 용액의 색이 검은색으로 변화하게 되며, 폐 PEG 용액을 $H_2O_2$를 이용한 산화작용으로 용액 내에 존재하는 착색유기물을 분해하고 색을 되돌려 재활용하였다.

• 한국문화재보존과학회:학술대회논문집
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• 한국문화재보존과학회 2005년도 제22회 학술대회 발표 논문집
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• pp.122-134
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• 2005

XRF, EDX, IR analysis was conducted to figure the effect of Fe to blacken the waterlogged wood. The results showed that investigated soil contained more Fe than normal soil by XRF analysis and wood ash contained more sulfur and Fe than any other element by EDX analysis. C-H and C-O peaks were significantly reduced at the surface of wood where is blackened part of waterlogged wood by IR analysis. The optimum condition to remove Fe from waterlogged wood by EDTA was investigated. To do this, removed concentration of Fe was measured at various concentration of EDTA-2Na. The optimum pH of EDTA-2Na was figured to be 4.1 to 4.3 and as the concentration of EDTA was increasing, extracted concentration of Fe was also increased. In the case of 0.4 wt% of EDTA-2Na, 700ppm of Fe was eliminated and was stabilized after 48 hours time lapse. In the case of EDTA-3Na, the optimum pH was 7 to 8, and 10 ppm of Fe was eliminated at 0.4 wt% of EDTA-3Na. In the case of EDTA-4Na, the optimum pH was 10 to 11, and 120 ppm of Fe was eliminated at 0.4 wt% of EDTA-4Na.

• Advances in environmental research
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• 제6권2호
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• pp.147-158
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• 2017

This paper represents a set of experimental tests on remediation of nickel-contaminated kaolin by Electrokinetic method. For this purpose, we conducted unenhanced and EDTA-enhanced Electrokinetic tests in one, three, and five days of treatment. In unenhanced tests, we used deionized water as an electrolyte in the anode and the cathode compartments. In the EDTA-enhance tests, we used ethylenediaaminetetra acetic acid 0.1 Molar in the cathode and sodium hydroxide 0.1 Molar in the anode. The average nickel removal for unenhanced tests after three and five days of treatment was 19 and 23 percent, respectively. High buffer capacity of the soil is responsible for low removal efficiency in the unenhanced tests, which maintained pH close to the initial amount that restrained nickel as an adsorbed or precipitated forms. The average nickel removal for EDTA-unenhanced tests after three and five days of treatment was 22 and 12 percent, respectively. Lower ionic mobility of EDTA-Ni complex in comparison with $Ni^{+2}$, which is the main transportation mechanism for this complex, could be responsible for less removal efficiency in EDTA-enhanced test.

• Asian-Australasian Journal of Animal Sciences
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• 제18권8호
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• pp.1130-1134
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• 2005

An experiment was performed using 20 calves of about one-month old to investigate the effect of chelation therapy with calcium disodium ethylenediaminetetraacetate ($CaNa_2$EDTA) alone or along with antioxidant $\alpha$-tocopherol in lead loaded calves on blood trace minerals, erythrocytic sulfahydryl groups and some haematobiochemical parameters. Fifteen calves were given lead orally at a daily dose of 7.5 mg of 99% pure lead acetate/kg body weight for 28 days. Then the lead was withdrawn on day 28 and the calves were randomly divided into three groups. Each group of five animals was either treated with $CaNa_2$EDTA alone at the dose rate of 110 mg/kg body weight in two divided doses for 4 days or along with $\alpha$-tocopherol at the dose rate of 100 mg/kg body weight orally daily for 7 days, keeping the remaining five calves as lead-exposed untreated controls. Blood samples were collected at the end of the lead exposure (day 0) and thereafter on day 2, 4, 7 and 10 from the start of the chelation treatment. The treatment with EDTA alone led to slow but non-significant improvement in blood copper level, but incorporation of antioxidant $\alpha$-tocopherol in chelation therapy resulted in its significant decline, as recorded on day 7-post treatment. Withdrawal of lead or treatment with $CaNa_2$EDTA alone or along with $\alpha$-tocopherol enhanced the erythrocytic thiol contents and the levels of T-SH and P-SH became statistically (p<0.05) comparable to those of lead-exposed controls by day 7 and 4, respectively. There was no significant (p>0.05) change in serum urea, creatinine, total protein and albumin levels between the treatment groups. It is concluded from the present investigation that treatment with $CaNa_2$EDTA at the present dose rate is safe to be used for chelation in lead loaded calves.