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유류오염토양에서 유류분해 미생물의 분리 및 peat moss를 이용한 오염토양 처리에 관한 연구
천미희,손희정,김철,Chun, Mi-Hee,Son, Hee-Jeong,Kim, Chul 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.5
Isolation and application of oil-degradation microbes from the oil-contaminated soil and the determination of optimal operation conditions about the peat moss, the addition for the oil-biodegradation. After all experiments, we have acquired three important conclusions: First, we found out the 4 microbes, Pseudomonas fluorescens, Pseudomonas aeruinosa, Kurtia sp., Bacillus ceres, with excellent capability for the oil-degradation; Second, the optimal operating conditions of the peat moss for TPH treatment were pH $7{\sim}8$, temperature $25{\sim}30^{\circ}C$, water content 20%, mixing 2 times/ day, addition volume 2%; Third, in case of the application to the oil-contaminated soil with 4 mixed microbes, the removal efficiency of TPH was increased from 54% to 83% in oil-contaminated soil and from 65% to 85% in oil-contaminated soil with the peat moss.
김민철,천미희,김정선,박민정,Kim, Mintchul,Chun, Mihee,Kim, Jungsun,Park, Minjeong 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.6
The Soil Health Index (SHI) developed by Park et al. (2021) is used to evaluate soil health on remediated soils collected from several remediation project sites and monitored the changes of SHI during the remediation process of land farming, soil washing, and thermal desorption. In the case of land farming, the soils remediated below a legal standard didn't show any significant changes in indices of SHI except the downgrade of available phosphate from medium to a low level. The SHI scores were ranged from 52 to 56 in the contaminated soil and 54 to 57 in the remediated soil. With soil washing, bulk density changed from high to a low level, and available phosphate was lowered from medium to low level. As the SHI scores were evaluated as 58 to 63 for contaminated soil and 38 to 42 for remediated soils. For thermal desorption, soil respiration rate was reduced from high to low level and SHI was scored as 50 to 51 for contaminated soils and 43 to 47 for remediated soils. Even though any abrupt changes of the SHI in remediated soils were not identified in the soils used in this study, it is expected that soil in different conditions such as types and concentrations of contaminant and soil characteristics would result in distinguished changes of the SHI. There is a room for more studies collect diverse information on SHI across the country.
유류오염 토양에서 발생되는 VOCs 제거를 위한 분변토의 활용 가능성에 관한 기초연구
손희정,천미희,김철,Son, Hee-Jeong,Chun, Mi-Hee,Kim, Chul 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.5
This study was carried out two point view that reuse of sludge and adsorption of benzene, toluene and o-xylene of VOCs in cast, carbonized cast and activated carbon. The cation exchange capacity of cast and carbonized cast were 59.2, 112 meq/100g, respectively. The specific surface were 560, $800m^2/g$, respectively. The average removal rates of benzene by 50g cast of 50% hydrous cast, anhydrous cast, carbonized cast, activated carbon were 15.0, 41.2, 88.2, 99.4% in 60min of retention time. The average removal efficiency of toluene by 50 g cast of 50% hydrous cast, anhydrous cast, carbonized cast, activated carbon were 12.5, 34.2, 88.2, 99.5% in 60 min of retention time. The average removal rates of o-xylene 50 g cast of 50% hydrous cast, anhydrous cast, carbonized cast, activated carbon were 8.8, 28.5, 84.8, 98.1% in 60min of retention time. The adsorption efficiency of test absorbent was in order of Activated Carbon > Carbonized Cast > Cast.
곽영규,김철,천미희 동의공업대학 2000 論文集 Vol.26 No.1
This paper describes a adequate pretreatment method for determining selenium by atomic absorption spectrometry with hydride generation (HG-AAS). The concentration of selenium was determined by HG-AAS, in which selenium was not detected, but selenite was measured. For a total selenium determination, selenate should be reduced to selenite by boiling a few minutes to sample solutions with reducing reagent. After a variable study, its condition was determined which 30m1 sample solution is boiling for 30min with hydrochloric acid (FW: 36.46, 35%) in lOO℃ water bath. As a recovery result in this method to deionized water and drinking water, almost 100% of selenate and selenite were recovered from deionized water, above 97% from drinking water.
김민철,박용하,천미희,정명채,김정욱 한국지하수토양환경학회 2023 지하수토양환경 Vol.28 No.5
This review examined the current administrative policies and guidelines for management of reclaimed soils afterremediation processes and proposed practical strategies to improve the potential value of the remediated soil as a resource. Three management practices are proposed to facilitate more efficient recycling of remediated soil; obligatory use, qualitycertification, and tracking of the remediated soils. If properly implemented in utilization of remediated soil, these strategiescould contribute to enhancing public safety by assuring soil quality. Such administrative tools, for both suppliers anddemanders, are expected to mitigate potential risks associated with the transactions of remediated soil. To enhance thequality assurance process, a soil quality certification combined with the soil health assessment index was proposed. Thesystematic integration of the suggested practices with soil health assessment can allow to produce optimal results,encompassing affordability, efficiency, and accessibility, which helps establishing more robust ‘Remediated Soil RecyclingManagement System (RSRMS)’. Subsequent researches should be conducted to develop more effective policies thatincorporate soil health assessment tools. The proposed management practices for remediated soil, coupled with soil healthassessment, can be a pioneering effort to achieve such goals. By fostering an environmentally friendly policies, thesustainable utilization of remediated soil can be attained. Overall, the proposed strategies can provide a sound frameworkfor responsible and sustainable soil management practices.
생물학적 처리공정에서 응집제 사용에 따른 미생물 활성도 영향
한승우(Seung Woo Han),천미희(Mi Hee Chun),박준민(Jun Min Park),강동효(Dong Hyo Kang),강임석(Lim Seok Kang) 大韓環境工學會 2012 대한환경공학회지 Vol.34 No.1
Alum은 단분자성 알루미늄이 주종이었고, PAC는 고분자성 알루미늄을 함유하고 있었다. Alum과 PAC 모두 응집제 주입에 따른 총인 제거는 향상되었다. 응집제 사용은 미생물 활성도에 영향을 미치는 것으로 나타났다. Alum에 비해 PAC가 미생물 활성도에 대한 영향을 적게 미치는 것으로 나타났다. 그리고 슬러지 반송에 따른 미생물 활성도와 개체수에 대한 영 향은 미미한 것으로 나타났다. Alum contained dominantly the monomeric aluminum species, and PAC contained the polymeric aluminum species. Both Alum and PAC has been improved removal of TP with increasing coagulant dose. Coagulant used directly influenced the microbial activity. Impact on microbial activity, the PAC was smaller than Alum. And impact on microbial activity and population according to the return sludge appeared to be minor.