간행물

한국물환경학회> 한국물환경학회지

한국물환경학회지 update

Journal of Korean Society on Water Environment

  • : 한국물환경학회
  • : 공학분야  >  환경공학
  • : KCI등재
  • :
  • : 연속간행물
  • : 격월
  • : 2289-0971
  • : 2289-098X
  • :

수록정보
수록범위 : 1권1호(1985)~38권2호(2022) |수록논문 수 : 2,388
한국물환경학회지
38권2호(2022년 03월) 수록논문
최근 권호 논문
| | | |

KCI등재

1차등 3차원 형광 여기-방출 매트릭스를 이용한 다양한 기원의 용존 유기물질 트리할로메탄 생성능 예측

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

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

다운로드

(기관인증 필요)

초록보기

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

2UV 광풍화에 의한 미세플라스틱 기원 유기물 용출과 형광 특성: 자연유래 유기성 입자와의 비교

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)

다운로드

(기관인증 필요)

초록보기

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

3화학적 개질을 통한 별 불가사리 바이오차 표면 분석 및 중금속 흡착 효율 평가

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

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

다운로드

(기관인증 필요)

초록보기

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

4유기성 폐기물의 혐기성 소화효율 향상을 위한 열가용화 하수슬러지의 통합소화

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)

다운로드

(기관인증 필요)

초록보기

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

5퇴적물 공극수내 O2, Fe2+, Mn2+ 및 HS- 센싱을 위한 금아말감 미세전극 개발

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)

다운로드

(기관인증 필요)

초록보기

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.

1
권호별 보기

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기