토양 정화 방법에 따른 토양의 물리화학적 특성 변화

이용민,오참뜻,김국진,이철효,성기준,Yi, Yong-Min,Oh, Cham-Teut,Kim, Guk-Jin,Lee, Chul-Hyo,Sung, Ki-June 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.4

Various methods are used to remediate soil contaminated with heavy metals or petroleum. In recent years, harsh physical and chemical remediation methods are being used to increase remediation efficiency, however, such processes could affect soil properties and degrade the ecological functions of the soil. Effects of soil washing, thermal desorption, and land farming, which are the most frequently used remediation methods, on the physicochemical properties of remediated soil were investigated in this study. For soils smaller than 2 mm, the soil texture were changed from sandy clay loam to sandy loam because of the decrease in the clay content after soil washing, and from loamy sand to sandy loam because of the decrease in the sand content and increase in silt content during thermal desorption, however, the soil texture remained unchanged after land farming process. The water-holding capacity, organic matter content, and total nitrogen concentration of the tested soil decreased after soil washing. A change in soil color and an increase in the available phosphate concentration were observed after thermal desorption. Exchangeable cations, total nitrogen, and available phosphate concentration were found to decrease after land farming; these components were probably used by microorganisms during as well as after the land farming process because microbial processes remain active even after land farming. A study of these changes can provide information useful for the reuse of remediated soil. However, it is insufficient to assess only soil physicochemical properties from the viewpoint of the reuse of remediated soil. Potential risks and ecological functions of remediated soil should also be considered to realize sustainable soil use.

정화토양의 토양질 평가

이용민(Yong Min Yi),성기준(Kijune Sung) 한국생태공학회 2022 한국생태공학회지 Vol.9 No.1

Since the use of the remediated soil is undetermined, the quality of the soil should be appropriately evaluated according to its future use. In this study, we developed a soil quality assessment method that can be applied to soils after the remediation process. Soil quality was assessed based on soils that require productivity for use in agricultural fields and landscaping in uncontaminated, contaminated, and remediated cases using soil washing, landfarming, and thermal desorption. The results showed that the quality of soil washing treated deteriorated the most compared to landfarming and thermal desorption-treated soil, assessed based on the case of use as field soil. In the case of thermal desorption, the range of reduction was smaller than that of soil washing, but soil quality decreased slightly after remediation. However, in the case of landfarming, there was no change in soil quality after remediation. The soil quality indices calculated for landscaping also decreased the most in the soil washing because organic matter and pH decreased during the process. In the case of thermal desorption and landfarming, all the soil quality decreased due to contamination, but it increased slightly after remediation. The two indices applied in this study, SQIT and SQIA, showed similar trends, suggesting that both can be used for soil quality evaluation. Further research is needed on how much the soil quality evaluation results presented in this study can reflect the various services the soil ecosystem provides, that is, the actual soil functions in these soils.

습지에서 비점오염물질 저감에 미치는 침수식물의 영향

이용민 ( Yong Min Yi ),강대석 ( Dae Seok Kang ),성기준 ( Ki June Sung ) 한국물환경학회 ( 구 한국수질보전학회 ) 2008 공동 추계학술발표회 Vol.2008 No.-

습지의 수환경과 영양물질에 미치는 침수식물의 영향

이용민 ( Yong Min Yi ),이석모 ( Suk Mo Lee ),성기준 ( Ki June Sung ) 한국물환경학회 2010 한국물환경학회지 Vol.26 No.1

해저케이블사업에 따른 해양환경영향평가 개선방안

이용민(Yong-Min YI),오현택(Hyun-Taik OH),김성은(Seong Eun KIM) 한국수산해양교육학회 2017 水産海洋敎育硏究 Vol.29 No.4

Development activities in the marine are steadily increasing, and its usage and development has been enlarged and diversified. For the effective evaluation of the marine environmental impact of the submarine cable project, which is one of the sea development activities, it is necessary to make evaluation that fully reflects the characteristics of projects and carry out continuous studies related to it. In this study, we examined the current status of submarine cable projects and the marine environmental impact of cable projects. As a result of reviewing the statement of the sea area utilization consultation, the number of projects related to submarine cable were 20 from 2012 to 2017. And they were concentrated on the South and West coasts, with 60% in the South Sea, 35% in the West Sea, and 5% in the East Sea. By the type of cable, the number of cable projects for communication and power were 9 and 8, respectively. The effects of the submarine cable project include the disturbance of the submarine bed, the resuspension of pollutants due to diffusion of suspended matter, and the noise during the process of burial, operation, and removal of cables. Specially, in case of power cable, it was found that electromagnetic field and heat radiation occurred in the operation phase. For effective impact assessment of cable projects, at the time of the current survey, it is necessary to survey the marine usage, protect area and the pollution status of the sediments of project area. At the stage of prediction of impact, the influence on the electromagnetic field should be taken into consideration as well as suspended materials dispersion. In case of mitigation measures, it is possible to minimize the impact by selecting the route based on the status survey results. In the case of monitoring, it is needed to select the survey point focusing on the route and to include the comparison of the photograph or video data of before and after projects.

정화토양 및 배출가스의 환경적 특성 분석을 통한 저온열탈착장치의 현장 적용성 평가

오참뜻,이용민,김용성,전우진,박광진,김치경,성기준,장윤영,김국진,Oh, Cham-Teut,Yi, Yong-Min,Kim, Young-Soung,Jeon, Woo-Jin,Park, Gwang-Jin,Kim, Chi-Kyung,Sung, Ki-June,Chang, Yoon-Young,Kim, Guk-Jin 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.3

Geochemical and ecological properties of remediated soil and gas exhausted from a low-temperature thermal desorption (LTTD) process were analyzed to assess the environmental impact of LTTD treatment. Soil characteristics were examined with regard to the chemical (EC, CEC, and organic matter) and the ecological (dehydrogenase activity, germination rate of Brassica juncea, and growth of Eisenia andrei) properties. The exhaust gases were analyzed based on the Air Quality Act in Korea as well as volatile organic compounds (VOCs) and mixed odor. Level of organic Organic matter of the soil treated by LTTD process was slightly decreased compared to that of the original soil because the heating temperature ($200^{\circ}C$) and retention time (less than 15 minutes) were neither high nor long enough for the oxidation of organic matter. The LTTD process results in reducing TPH of the contaminated soil from $5,133{\pm}508$ mg/kg to $272{\pm}107$ mg/kg while preserving soil properties. Analysis results of the exhaust gases from the LTTD process satisfied discharge standard of Air Quality Law in Korea. Concentration of VOCs including acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde in circulation gas volatilized from contaminated soil were effectively reduced in the regenerative thermal oxidizer and all satisfied the legal standards. Showing ecologically improved properties of contaminated soil after LTTD process and environmentally tolerable impact of the exhaust gas, LTTD treatment of TPH-contaminated soil is an environmentally acceptable technology.

갈대 관리 방법에 따른 습지에서의 갈대 재 발생 특성

박소영(So Young Park),이용민(Yong Min Yi),성기준(Ki June Sung) 한국생태공학회 2019 한국생태공학회지 Vol.7 No.1

Phragmites communis provide a variety of ecological functions, but they are highly invasive, aggressively reproduced, and difficult to remove. When they are over-extended and dominant species, wetland ecosystems are simplified and their ecological services are reduced. In this study, reoccurrence and growth characteristics of reed were investigated at 850 days after the application of various reed management methods under field conditions. The results showed that the removal of the only aboveground part of reed had no effect on reducing reoccurrence and growth. However, the removal of only 50 cm of the belowground part applied to this experiment, can prevent some reoccurrence of reeds. The most efficient way to inhibit the reoccurrence and growth of reeds was to use a completely covered weed mat after removing the belowground part. This prevents reoccurrence of reeds from the rhizosphere, intrusion of reeds from neighboring areas, and inhibits photosynthesis through shading. However, weed mats cannot be a permanent management tool and can interfere with the growth of other beneficial wetland plants. After the reeds were eliminated, weed mats should be removed. It may then need to plant other native plants or manipulate the water level to prevent recurrence of the reeds.

보호대상해양생물종인 잘피의 보전을 위한 해역이용협의의 사례연구

오현택(Hyun-Taik OH),이용민(Yong-Min YI),김혜진(Hye-Jin KIM) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.4

This study diagnosed the status of marine environmental impact assessment(MEIA) for project near the habitat of marine protected seagrass species such as Zostera caespitosa, Zostera asiatica, Phyllospadix iwatensis. For the preparation of a marine environmental impact statement, different monitoring parameters are used without any specific guideline for the assessment of current status. And also, both tools and techniques for MEIA are needed to improve for implementing. The monitoring plans and parameters are not considered well with the accuracy of the environmental predictions and effectiveness of any applicable mitigation measures. This study suggested the reasonable standard of the MEIA for the conservation of the marine protected seagrass species which have the habitat located near affected area. The inshore seagrasses need to be monitored including shoot count based on the “No Net Loss of Seagrass” as part of the monitoring parameters to assess the status of marine environment of environmental impact statement. In a process of effect prediction, we suggested a concentration of 10 mg/L suspended solids which added by the new developmental project near seagrasses habitat, referring to study of overseas case. But a further study for an appropriate standard is necessary effectively. In a mitigating process, priority needs to be considered in order of avoidance, minimization, reduction, compensation. In a post-monitoring process, it is necessary to monitor the seagrass species abundance to identify the variation of b/a (before and after) project. And in a case of implementing transplantation, survival rate need to be included to determine a success of project.

Status of Marine Environment of Olive Flounder, Paralichythys olivaceus, Culture Ground in Jeju-do

Hyun-Taik OH(오현택),Yong-Min YI(이용민),Yun-Sik CHO(조윤식),Jin-Ho KIM(김진호),Kyu-Hyun LEE(이규현) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.3

In this study, we monitored the status of marine environment of olive flounder, Paralichythys olivaceus, culture ground in Jeju-do, Republic of Korea. It reported the consumption of raw olive flounder meat containing of Kudoa, Kudoa septempunctata, could induce vomitting and diarrhea in Japan. The Kudoa is a new mycosporean species, researchers found Kudoa from the muscles of olive flounder cultured at western Japan and imported from Jeju-do. We choose two Kudoa positive farms and two negative farms in the mid of concern about the relation between Kudoa and habitat. We found two marine invasive species at the water-pumping seabed at one of the Kudoa positive farm. The concentration of pH and DO at on-growing flounder farms showed the decreasing pattern along side the raceway (influent sea waters > on growing sea waters > outfluent sea waters). The TN and TP values increased gradually following to the raceway (influent sea waters < on growing sea waters < outfluent sea waters). The concentration of COD and SS were in the range of 0.100 – 2.581 ㎎·L-1, 1.00 – 12.70 ㎎·L-1, respectively. The calculated residence time was 4hr 32minutes at F1, 11hr 21minutes at F2, and 9hr 50minutes at F3, respectively. It was calculated same distance of 4 km away from effluent pipes. Although direct relation between Kudoa and marine environment could not define well based on this study result, the more studies on marine environmental stressors for olive flounder are required to conduct as a reliable method including socio-economic group and environmental group.

도심지역의 비점오염원 제어를 위한 인공습지 설계 및 초기관리

신봉균 ( Bong Kyun Shin ),김영윤 ( Young Ryun Kim ),이광섭 ( Lwang Sup Lee ),이용민 ( Yong Min Yi ),성기준 ( Ki June Sung ),이석모 ( Suk Mo Lee ) 한국물환경학회 ( 구 한국수질보전학회 ) 2008 공동 추계학술발표회 Vol.2008 No.-