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한국물환경학회지 update

Journal of Korean Society on Water Environment

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수록정보
38권2호(2022) |수록논문 수 : 5
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38권6호(2022년 11월) 수록논문
최근 권호 논문
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KCI등재

저자 : 하준수 ( Junsoo Ha ) , 허다니엘상두 ( Daniel Sangdu Hur ) , 임채언 ( Chaieon Im ) , 정동희 ( Donghee Jung ) , 임영성 ( Youngseong Lim ) , 주진경 ( Jinkyong Ju )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 6호 발행 연도 : 2022 페이지 : pp. 267-274 (8 pages)

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This paper is a result of research conducted on the 800,000 m3/d capacity of A Water Treatment Plant (WTP) and 400,000 m3/d capacity of B WTP plant in operation in the Nakdong River region. We evaluated the effect of algae broom on the WTP operation based on the running data of both WTP and the data on the pre-oxidation process field test for algae control using sodium permanganate (SPM) at the B WTP. The study results showed that during the algal bloom period, the coagulant dose increased by 102% in A WTP and 58% in B WTP, respectively, and the chlorine dose also increased by 38% and 29%, respectively, which may affect Total trihalomethane (THM) production. Data such as algal populations and Chl-a, residual chlorine and THM, algal populations, and ozone dose appeared also highly correlated, confirming that algal broom affects WTP operations, including water quality and chemical dosage. As a result of the field test of B WTP, THMs appeared lower than that of the control, suggesting the possibility of the SPM pre-oxidation process as an alternative to algae-related water quality management. Furthermore, in terms of GHG emissions due to energy consumption, it was observed that the pre-oxidation process using SPM was approximately 10.8%, which is a very low ratio compared to the pre-ozonation process. Therefore, these results suggest that the SPM pre-oxidation process can be recommended as an alternative to low-carbon water purification technology.

KCI등재

저자 : 장준영 ( Junyoung Jang ) , 김주원 ( Joowon Kim ) , 황유훈 ( Yuhoon Hwang ) , 김기팔 ( Kipal Kim ) , 신현상 ( Hyunsang Shin ) , 임병란 ( Byungran Lim )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 6호 발행 연도 : 2022 페이지 : pp. 275-281 (7 pages)

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To maintain water quality after water treatment, monitoring whether the quality of treated tap water quality changes is essential. However, current investigations are insufficient to prevent secondary contamination in drinking water supply systems. This study investigated Gyeonggi's e apartment where a red water problem occurred and monitored the water quality and corrosiveness of the overall water supply system to the apartment from June 2021 to April 2022. In a comparison of drinking water quality after water treatment and the influent of the reservoir, turbidity and heavy metal concentrations were increased and residual chlorine was decreased due to increases in temperature. Correlation analysis and principal component analysis (PCA) indicated that a low level of residual chlorine may cause the abscission of Mn2+ and Fe2+ through microorganism activation, which also causes a high level of turbidity. The corrosion index (LI) in the influent of the reservoir tank was increased due to Ca2+ and temperature. These results indicate that the corrosiveness of drinking water and the deterioration of drinking water quality were mainly increased between the drinking water treatment plant and the reservoir tank's influent. The findings provide clear evidence that it is essential to manage water supply systems and reservoir tanks to prevent the secondary contamination of drinking water.

KCI등재

저자 : 이수현 ( Su-hyeon Lee ) , 허재희 ( Jae-hee Huh ) , 황선진 ( Sun-jin Hwang )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 6호 발행 연도 : 2022 페이지 : pp. 282-291 (10 pages)

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Since the efficiency of wastewater treatment using microalgae differs depending on the metabolic characteristics of the species, it is important to understand the characteristics of target algae prior to the application in wastewater treatment. In this study, for the application of Arthrospira platensis to wastewater treatment, which is a filamentous alkaliphilic cyanobacteria, basic species specificity was identified and the possibility of application to wastewater treatment was investigated. As a result of the species specificity investigation, the specific growth rate between pH 7.0 and 11.0 showed the highest value near pH 9 at 0.25/day. The reason for the relatively low growth(0.08/day) at pH 11 was thought to be the CA(carbonic anhydrase) enzyme that is involved in carbon fixation during photosynthesis has the highest activity at pH 8.0 to 9.0, and at pH 11, CA activity was relatively low. In addition, A. platensis showed optimal growth at 400 PPFD(photosynthetic photon flux density) and 30℃, and this means that cyanobacteria such as A. platensis have a larger number of PS-I(photosystem I) than that of PS-II(photosystem II). It was speculated that it was because higher light intensity and temperature were required to sufficiently generate electrons to transfer to PS-I. Regarding the applicability of A. platensis, it was suggested that if a system using the synergistic effect of co-culture of A. platensis and bacteria was developed, a more efficient system would be possible. And different from single cocci, filamentous A. platensis expected to have a positive impact on harvesting, which is very important in the latter part of the wastewater treatment process.

KCI등재

저자 : 심선희 ( Sun-hee Shim ) , 김유흔 ( Yu-heun Kim ) , 이혜원 ( Hye Won Lee ) , 김민 ( Min Kim ) , 최정현 ( Jung Hyun Choi )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 6호 발행 연도 : 2022 페이지 : pp. 292-305 (14 pages)

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The Yeongsan River, one of the four largest rivers in South Korea, has been facing difficulties with water quality management with respect to algal bloom. The algal bloom menace has become bigger, especially after the construction of two weirs in the mainstream of the Yeongsan River. Therefore, the prediction and factor analysis of Chlorophyll-a (Chl-a) concentration is needed for effective water quality management. In this study, Chl-a prediction model was developed, and the performance evaluated using machine and deep learning methods, such as Deep Neural Network (DNN), Random Forest (RF), and eXtreme Gradient Boosting (XGBoost). Moreover, the correlation analysis and the feature importance results were compared to identify the major factors affecting the concentration of Chl-a. All models showed high prediction performance with an R2 value of 0.9 or higher. In particular, XGBoost showed the highest prediction accuracy of 0.95 in the test data. The results of feature importance suggested that Ammonia (NH3-N) and Phosphate (PO4-P) were common major factors for the three models to manage Chl-a concentration. From the results, it was confirmed that three machine learning methods, DNN, RF, and XGBoost are powerful methods for predicting water quality parameters. Also, the comparison between feature importance and correlation analysis would present a more accurate assessment of the important major factors.

KCI등재

저자 : 이기순 ( Gi-soon Lee ) , 백종훈 ( Jonghun Baek ) , 최지연 ( Ji Yeon Choi ) , 이영재 ( Youngjea Lee ) , 신동석 ( Dong Seok Shin ) , 하돈우 ( Don-woo Ha )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 6호 발행 연도 : 2022 페이지 : pp. 306-315 (10 pages)

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In this study, long-term measurement data were applied to the LOADEST model and used as an analysis tool to identify and interpret trends in pollution load. The LOADEST model is a regression equation-based pollution load estimation program developed by the United States Geological Survey (USGS) to estimate the change in the pollution load of rivers according to flow rate and time and provides 11 regression equations for pollution load evaluation. As a result of simulating the Gwangjuchen2, Pungyeongjeongchen, and Pyeongdongchen in the Yeongbon B unit basin in the middle and upper reaches of the Yeongsan River with the LOADEST model using water quality and flow measurement data, lower values were observed for the Gwangjuchen2 and Pyeongdongchen, whereas the Pungyeongjeongchen had higher values. This was judged to be due to the characteristics of the LOADEST model related to data continuity. According to the parameters estimated by the LOADEST model, pollutant trends were affected by increases in the flow. In addition, variability increased with time, and BOD and T-P were affected by the season. Thus, the LOADEST model can contribute to water quality management as an analytical tool for long-term data monitoring.

KCI등재

저자 : 최정화 ( Jounghwa Choi ) , 권재옥 ( Jaeog Kwon ) , 이미선 ( Miseon Lee ) , 장욱 ( Wook Jang ) , 최근화 ( Geunhwa Choi ) , 고은혜 ( Eunhye Ko ) , 심서현 ( Seohyeon Sim ) , 조창우 ( Changwoo Cho )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 6호 발행 연도 : 2022 페이지 : pp. 316-326 (11 pages)

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Agricultural season, Non-point pollution source, Pollution contribution rate, Stormwater pipeline, Total phosphate (TP)


This study aimed to investigate the causes of the increasing Total Phosphate(TP) in the mainstream of Mangyeong river over the past 10 years, and suggested a reduction plan of about 3 points. First, the high TP concentration was continuously released in the discharge outlet of the Haepo bridge stormwater pipeline. The average TP concentration was 5.066 mg/L and values as high as 29.470 mg/L were measured. The highest pollution contribution rate to the Mangyeong river was more than 70 %. The cause of the pollution was expected to take place somewhere in Wanju Industrial Complex. Second, the average TP concentration of wastewater-treated effluent in the H factory was 0.405 mg/L. If a TP reduction facility is additionally installed in the H factory, it will help reduce TP uptake by Lake Saemangeum. Third, the TP concentration of untreated non-point source point flowing into the Samrae stream was very high with an average of 2.828 mg/L. Also, the pollution contribution rate of Samraecheon 2 to Mangyeong river was 21.8 % on average and up to 58 %. The pollution contribution rate was also high during the agricultural season and the winter, during which the flow rate is decreased. Investigation of these three points may be continuously needed, and analysis results and policy proposals presented to Jeollabukdo and Wanjugun to manage pollution sources.

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KCI등재

저자 : 배경록 ( Kyung Rok Bae ) , 허진 ( Jin Hur )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 2호 발행 연도 : 2022 페이지 : pp. 63-71 (9 pages)

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This study aimed to maximize the potential of fluorescence 3D excitation-emission matrix (EEM) for predicting the trihalomethane formation potential (THMFP) of DOM with various sources. Fluorescence spectroscopy is a useful tool for characterizing dissolved organic matter (DOM). In this study, differential spectroscopy was applied to EEM for the prediction of THMFP, in which the difference between the EEM before and after chlorination was taken into account to obtain the differential EEM (DEEM). For characterization of the original EEM or the DEEM, the maximum intensities of several different fluorescence regions in EEM, fluorescence EEM regional integration (FRI), and humification index (HIX) were calculated and used for the surrogates for THMFP prediction. After chlorination, the fluorescence intensity decreased by 77% to 93%. In leaf-derived and effluent DOM, there was a significant decrease in the protein-like peak, while a more pronounced decrease was observed in the humic-like peak of river DOM. In general, leaf-derived and effluent DOM exhibited a relatively lower THMFP than the river DOM. Our results were consistent with the high correlations between humic-like fluorescence and THMFP previously reported. In this study, HIX (r= 0.815, p<0.001), FRI region V (r=0.727, p<0.001), humic-like peak (r= 0.827, p<0.001) from DEEM p resented very high correlations with THMF P. When the humic-like peak intensity was converted to a logarithmic scale, a higher correlation was obtained (r= 0.928, p<0.001). This finding suggests that the humic-like peak in DEEM can serve as a universal predictor for THM formation of DOM with various origins.

KCI등재

저자 : 최나은 ( Na Eun Choi ) , 이윤경 ( Yun Kyung Lee ) , 허진 ( Jin Hur )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 2호 발행 연도 : 2022 페이지 : pp. 72-81 (10 pages)

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Numerous studies have investigated the occurrence and fate of microplastics in the environment; however, only limited effort has been devoted to exploring the characteristics of dissolved organic matter (DOM) leached from microplastics. In microplastic (MP)-contaminated environment, MPs are typically mixed with naturally-occurring particles, which interferes with their detection in the environment. Thus, it is necessary to distinguish between the DOM leached from MPs and those leached from natural particles and also to characterize their properties. This study investigated DOM leaching behavior from MPs (polystyrene: PS, polyvinylchloride: PVC) and natural particulates (forest soil: FS, litter leaves: LL) under light, which is considered one of the main weathering processes that affect MPs in the environment. The leached DOM concentrations and fluorescence characteristics were compared under dark versus light conditions. Regardless of the origins, UV light promoted DOM release from all the particulates. More DOM was released from natural particles than from MPs under both conditions. However, the effect of promoting DOM release by UV was more pronounced for MPs than for natural particles. It was observed from fluorescence spectra that the intensity of the humic-like region was substantially reduced when MP-derived DOM was exposed to UV light, whereas the change of intensity was very little for natural particles. Under light conditions, the ratio of protein-like to humic-like fluorescence of MP-derived DOM was higher than that of DOM from natural particles. This study implies that a substantial amount of DOM could be leached from MPs even in MP-polluted environment under UV irradiation. Protein/humic fluorescence ratio could be utilized as a fast probing indicator to separate the two sources of Numerous studies have investigated the occurrence and fate of microplastics in the environment; however, only limited effort has been devoted to exploring the characteristics of dissolved organic matter (DOM) leached from microplastics. In microplastic (MP)-contaminated environment, MPs are typically mixed with naturally-occurring particles, which interferes with their detection in the environment. Thus, it is necessary to distinguish between the DOM leached from MPs and those leached from natural particles and also to characterize their properties. This study investigated DOM leaching behavior from MPs (polystyrene: PS, polyvinylchloride: PVC) and natural particulates (forest soil: FS, litter leaves: LL) under light, which is considered one of the main weathering processes that affect MPs in the environment. The leached DOM concentrations and fluorescence characteristics were compared under dark versus light conditions. Regardless of the origins, UV light promoted DOM release from all the particulates. More DOM was released from natural particles than from MPs under both conditions. However, the effect of promoting DOM release by UV was more pronounced for MPs than for natural particles. It was observed from fluorescence spectra that the intensity of the humic-like region was substantially reduced when MP-derived DOM was exposed to UV light, whereas the change of intensity was very little for natural particles. Under light conditions, the ratio of protein-like to humic-like fluorescence of MP-derived DOM was higher than that of DOM from natural particles. This study implies that a substantial amount of DOM could be leached from MPs even in MP-polluted environment under UV irradiation. Protein/humic fluorescence ratio could be utilized as a fast probing indicator to separate the two sources of particles under light.particles under light.

KCI등재

저자 : 장하린 ( Ha Rin Janga ) , 문덕현 ( Deok Hyun Moon )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 2호 발행 연도 : 2022 페이지 : pp. 82-94 (13 pages)

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In this study, chemically modified biochar (NSBP500, KSBP500, OSBP500) derived from starfish was utilized to improve the adsorption ability of the SBP500 (Starfish Biochar Pyrolyzed at 500℃) in a solution contaminated with heavy metals. According to the biochar modification performance evaluation batch tests, the removal r ate and adsorption amount of NSBP500 increased 1 .4 times f or Cu, 1 .5 times f or Cd, and 1 .2 times for Zn as compared to the control sample SBP500. In addition, the removal rate and adsorption amount of KSBP500 increased 2 times f or Cu, 1.8 times for Cd, and 1 .2 times f or Zn. The removal r ate and adsorption amount of OSBP500 increased 5.8 times for Cu. The FT-IR analysis confirmed the changes in the generation and movement of new functional groups after adsorption. SEM analysis confirmed Cu in KSBP500 was in the form of Cu(OH)2 and resembled t e structure of nanowires. The C d in K SBP500 was densely covered in cubic form of Cd(OH)2. Lead(Pb) was in the form of Pb3(OH)2(CO3)2 in a hexagonal atomic layer structure in NSBP500. In addition, it was observed that Zn was randomly covered with Zn5(CO3)2(OH)6 pieces which resembled plates in KSBP500. Therefore, this study confirmed that biochar removal efficiency was improved through a chemical modification treatment. Accordingly, adsorption and precipitation were found to be the complex mechanisms behind the improved removal efficiency in the biochar. This was accomplished by electrostatic interactions between the biochar and heavy metals and ion exchange with Ca2+.

KCI등재

저자 : 오경수 ( Kyung Su Oh ) , 황정기 ( Jung Ki Hwang ) , 송영주 ( Young Ju Song ) , 김민지 ( Min Ji Kim ) , 박준규 ( Jun Gyu Park ) , 박대원 ( Dae Won Pak )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 2호 발행 연도 : 2022 페이지 : pp. 95-102 (8 pages)

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Studies for improving the efficiency of the traditional anaerobic digestion process are being actively conducted. To improve anaerobic digestion efficiency, this study tried to derive the optimal pretreatment conditions and mixing conditions by integrating the heat solubilization pretreatment of sewage sludge, livestock manure, and food waste. The soluble chemical oxygen demand (SCOD) increase rate of sewage sludge before and after heat solubilization pretreatment showed an increased rate of 224.7% compared to the control group at 170℃ and 25 min and showed the most stable increase rate. As a result of the biomethane potential test of sewage sludge before and after heat solubilization pretreatment, the total chemical oxygen demand (TCOD) and SCOD removal rates increased as the heat solubilization temperature increased, but did not increase further at temperatures above 170°C. In the case of methane generation, there was no significant change in the cumulative methane generation from 0.134 to 0.203 Sm3-CH4/kg-COD at 170°C for 15 min. As a result of the integrated digestion of organic waste, the experimental condition in which 25% of the sewage sludge, 50% of the food waste, and 25% of the livestock manure were mixed showed the highest methane production of 0.3015 m3-CH4/kg-COD, confirming that it was the optimal mixing ratio condition. In addition, under experimental conditions mixed with all three substrates, M4 conditions mixed with 25% sewage sludge, 50% food waste, and 25% livestock manure showed the highest methane generation at 0.2692 Sm3-CH4/kg-COD.

KCI등재

저자 : 권순길 ( Soongil Kwon ) , 박동근 ( Donggeun Park ) , 최근영 ( Geunyoung Choi ) , 성재빈 ( Jaebin Sung ) , 김현수 ( Hyunsoo Kim ) , 이재우 ( Jae Woo Lee ) , 홍용석 ( Yongseok Hong )

발행기관 : 한국물환경학회 간행물 : 한국물환경학회지 38권 2호 발행 연도 : 2022 페이지 : pp. 103-112 (10 pages)

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A gold amalgam voltammetric microelectrode (GAVM) system was developed for the quantification of dissolved biogeochemical species, such as O2, Fe2+, Mn2+, and HS- in sediment porewater. Commercially available Ag/AgCl and platinum electrodes were used as the reference and counter electrode, respectively, and a gold amalgam microelectrode was fabricated in the laboratory using 150-um diameter gold wire and a borosilicate capillary tube with a 1.6-mm diameter. A portable potentiostat (Metrohm, DropSens) was used for the application of voltage sweeping and to acquire the electric current. For sediment profiling, a commercially available actuator was customized and modified. The analysis method used in the system used the most widely used analysis method among the electrochemical analysis currently used The GAVM system was successively calibrated with the species and applied to estuarine sediments. The porewater analysis showed that the oxygen concentration was decreased to zero at a depth of 0.6 mm, and maximum Mn2+ and Fe2+ concentrations of 50 uM and 20 uM were detected at 2 and 3-cm depths, respectively. Maximum HS- concentrations of 10 uM were detected at 4 cm in the deeper sediments. The GAVM system was successfully developed and applied to the sediment and can be used to better understand biogeochemical reactions.

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