• 한국환경보건학회지
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• 제37권2호
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• pp.159-164
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• 2011

We describe a method for effectively pretreating soil highly that has been contaminated with fluorene (${\gg}$ 120 mg/kg soil), i.e., we apply Fenton oxidation in which ethanol is added to increase fluorene removal. To obtain maximum fluorene removal efficiency, a minimum of 1.0 ml of ethanol, 0.35 ml of $H_2O_2$, and 0.2 ml of 0.5M $Fe^{2+}$ was needed per 1 g of fluorene-contaminated soil. Under optimal Fenton oxidation conditions, 13% of 9-fluorene was generated during Fenton oxidation of 43% fluorene. The biodegradability of 9-fluorenone was subsequently confirmed to be much more rapid than that of fluorene, i.e., biodegradability of 96% versus 35% over 31 days. These results demonstrate that the proposed treatment method can be effectively applied to remove fluorene prior to disposal at industrial waste sites.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.1997-2001
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• 2010

Generally, railroad soil around turnout was caused by leakage of lubricant oils during its maintenance. So, TPH concentration in soil was much higher than standard in Soil Envirnment Law. In additiont, railroad site was still difficult to assess due to railcar operation. This research was conducted to investigate the effect on electrolyte concentration during the Electrokinetic-Fenton process for contaminated soil around railroad turnout. As a result, experimental result shows that TPH removal in soil and amount of EOF were changed depending on electrolyte concentration. In future, the removal efficiency can be enhanced to optimize concentration in EK-Fenton Process.

• 한국염색가공학회지
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• 제10권4호
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• pp.45-52
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• 1998

Reuse of wastewater become an important consideration to solve the environmental pollution problems in recent industriallzation and urbanization. Especially, he characteristic of dyeing process is subject to use much water and thus has serious problems for removal of color and organic pollutants in their wastewater. This report is divided into two main parts ： The purpose of the first part was to determine if alkaline wastewater discharged from textile dyeing operation factory could be flocculated directly by Fenton oxidation method. This study was conducted to investigate Fenton reagent dose and reaction condition of Fenton method as pretreatment for dyeing wastewater in K dyeing industry were investigated. In the second part of this research, to treat dyeing wastewater it was found that the most effective way is to use ultrafiltation and reverse osmosis at the conditions of the pH 7.0~8.0 and operating pressure of $2.5~35kg_f/cm^2$. This paper is mainly dealt with the application on reuse system of dyeing wastewater treatment using ultrafiltration and reverse osmosis membranes. The results showed that dyeing wastewater could be reused by chemical, filter and membrane sequential treatment process.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 추계학술발표회
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• pp.128-131
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• 2003

To clarify the effect of soil property on the EK-Fenton remediation of the soil contaminated with phenanthrene, this research had been conducted. In the experiments using EPK kaolinite, the $H_2O$$_2$ stability and effect of phenanthrene treatment improved more than that in the experiments using Hadong clayey soil. The results signify that Fe oxide content and acid buffer capacity significantly affected the fate of $H_2O$$_2$ and phenanthrene during the EK-Fenton process.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.239-242
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• 2002

Removal of phenanthrene by electrokinetic (EK) method combined with Fenton-like process was studied in a model system. Sand and phenanthrene were selected as a model soil and a representative PAH. Sand was contaminated at the concentration of 500 mg phenanthrene/kg dry sand. Bentonite and kaolinite were inserted into the space between reservoir and contaminated soil. When hydrogen peroxide supplied to a soil system from the anode reservoir was transported through the soil by EK process, the Fenton-like reaction was occurred by naturally existing iron minerals in soil. When hydrogen peroxide was supplied into the system, it showed higher removal efficiency than when just water was used. Maximum removal efficiency of phenanthrene was 81.2 % for 7 days.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 추계학술대회
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• pp.136-139
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• 2000

Fenton-like oxidation of para-nitrophenol(PNP) was studied using hydrogen peroxide iii combination with steeler's dust substituted for ferrous iron in Fenton's reaction. Various factors critical in the degradation of PNP were studied, including hydrogen peroxide dosage, concentration of steeler's dust. and initial pH. Experimental results showed that 1,000mg/L PNP and its oxidation intermediate could be mostly decomposed within 30m1n by 10g/L steeler's dust, 0.25% hydrogen peroxide, and initila pH of 3.0. The reaction rate constant (k) of CODcr concentration were calculated with the addition of steeler's dust(0.0059 min$^{-1}$ (g/L)$^{-1}$ ) and hydrogen peroxide(0.2965 min$^{-1}$ (%)$^{-1}$ ), respectively.

• 한국지하수토양환경학회지:지하수토양환경
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• 제17권2호
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• pp.15-21
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• 2012

MTBE (Methyl tertiary-butyl ether) has been commonly used as an octane enhancer to replace tetraethyl lead in gasoline, because MTBE increases the efficiency of combustion and decreases the emission of carbon monoxide. However, MTBE has been found in groundwater from the fuel spills and leaks in the UST (Underground Storage Tank). Fenton's oxidation, an advanced oxidation catalyzed with ferrous iron, is successful in removing MTBE in groundwater. However, Fenton's oxidation requires the continuous addition of dissolved $Fe^{2+}$. Zero-valent iron is available as a source of catalytic ferrous iron of MFO (Modified Fenton's Oxidation) and has been studied for use in PRBs (Permeable Reactive Barriers) as a reactive material. Therefore, this study investigated the condition of optimization in MFO-PRBs using waste zero-valent iron (ZVI) with the waste steel scrap to treat MTBE contaminated groundwater. Batch tests were examined to find optimal molar ratio of MTBE : $H_2O_2$ on extent to degradation of MTBE in groundwater at pH 7 with 10% waste ZVI. As the results, the ratio of optimization of MTBE to hydrogen peroxide for MFO was determined to be 1:300[mM]. The column experiment was conducted to know applicability of MFO-PRBs for MTBE remediation in groundwater. As the results of column test, MTBE was removed 87% of the initial concentration during 120days of operational period. Interestingly, MTBE was degraded not only within waste ZVI column but also within sand column. It means the aquifer may affect continuously the MTBE contaminated groundwater after throughout the waste ZVI barrier. The residual products showed acetone, TBF (Tert-butyl formate) and TBA (Tert-butyl acetate) during this test. The results of the present study showed that the recycled materials can be effectively used for not only a source of catalytic ferrous iron but also a reactive material of the MFO-PRBs to remove MTBE in groundwater.

• 한국지하수토양환경학회지:지하수토양환경
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• 제7권2호
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• pp.73-81
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• 2002

전통적인 펜톤반응에서 Superoxide radical (${O_2}^-$.)에 의한 사염화탄소의 환원반응을 조사하였으며 과산화수소의 농도구배와 pH의 변화에 따른 ${O_2}^-$.의 생성률을 측정하였다. 펜톤반응에서 1-헥산올의 분해율은 pH가 증가함에 따라 90% (pH3) 에서 5% (pH5) 급격하게 감소한 반면 사염화탄소의 분해율은 pH가 증가함에 따라서 증가하였다. 이러한 결과는 펜톤반응이 Hydroxyl radical (${O_2}^-$.)의 산화반응과 ${O_2}^-$.의 환원반응이 공존하는 반응임을 보이는 결과이다. ${O_2}^-$.의 생성률은 pH 11에서 $H_2$O$_2$의 농도가 29.4mM에서 294mM로 증가함에 따라 (45.3$\pm$7.8) X $10^{-6}$ M/s에서 (151.0$\pm$26.2) X $10^{v}$ / M/s로 증가하였으며 294mM의 H$_2$$O_2$에서 pH가 7에서 11로 증가함에 따라 (22.1$\pm$3.8) x $10^{-6}$ / M/s에서 (151.0$\pm$26.2) x $10^{-6}$ M/s 증가하였다. 이러한 결과는 ${O_2}^-$.의 환원력을 적용한 펜톤반응이 넓은 pH영역에서 적용될 수 있음을 나타내는 결과이다. 특별히 토양내 흡착력이 약하고 지하수내에 쉽게 용해될 수 있으며 독성 및 발암성물질로 알려진 사염화탄소와 같은 염소계 유기화합물의 제거에 효과적으로 적용될 수 있을 것으로 사료된다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제6권3호
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• pp.13-20
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• 2001

본 연구에서는 고농도 유류오염토양 처리를 위해 ${H_2}{O_2}$/$Fe^0 시스템을 이용한 Fenton-like oxidation을 제시하였다. 주요 반응조건인 초기 PH, $Fe^0 및 ${H_2}{O_2}$ 주입량과 초기 오염농도를 변화시켜가며 본 산화처리 시스템의 반응특성을 회분식 실험을 통하여 알아보았다. 유류 오염물은 디젤을 사용하였으며 오염농도는 가스 크로마토그래피를 사용하여 TPH (Total Petroleum Hydrocarbon)로 나타내었다. 제거효율을 보면 적정 ${H_2}{O_2}$/$Fe^0 주입조건인 10% ${H_2}{O_2}$+ 20% Fe$^{0}$ 에서 반응시간 24이내에 약 65% 이상의 제거율(초기 TPH 농도 : 10,000mg/kg)을 나타내었으며, 초기 pH조건은 높은 제거효과를 얻기 위해서 3~4범위이내가 적정함을 알 수 있었다. 기존의 과산화수소의 분해촉매로 사용하는 철 염($FeSO_4)과의 비교실험에서는 $Fe^0를 촉매로 사용하였을 때 유류오염토양의 화학적 산화 처리가 처리효율과 경제성에서 더 효과적임을 알 수 있었고, 특히 고농도 오염토양 처리에서 더 유리한 것으로 나타났다.

• 한국습지학회지
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• 제12권1호
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• pp.75-82
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• 2010

본 연구는 인천광역시에 위치한 A 유수지의 효율적인 수환경 개선 방안을 모색하기 위해 수행되었다. 유수지 수질 및 저니질의 개선을 위해서 약품 응집과 해수 응집, 펜턴 처리 실험 등을 수행하였다. 실험 결과 해수 응집을 위한 최적 pH는 11이었으며, 해수 응집에 의해 SS, TP 항목 모두 높은 제거효율을 얻을 수 있었다. 저니토의 오염물질 제거를 위해서는 펜턴 산화 처리를 수행하였다. 저니토를 직접 펜턴 처리하는 경우와 용출 후 펜턴 처리하는 경우에 대한 처리효과를 비교한 결과, 제거-COD/$H_2O_2$는 단순 펜턴 처리하는 경우 0.55인 반면 용출 후 펜턴 처리하는 경우 0.69를 나타내어 용출 후에 산화 처리하는 방법이 처리효율 면에서 약 25% 보다 우수한 것으로 나타났다. 이들 두 처리로 유수지 수질을 호소수질기준 VI등급(매우 나쁨)에서 III등급(보통)의 수준으로 개선할 수 있었다.