http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
( Nash Jett Dg. Reyes ),( Franz Kevin F. Geronimo ),( Hyeson Choi ),( Lee-hyung Kim ) 한국물환경학회(구 한국수질보전학회) 2019 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2019 No.-
The use of constructed wetlands (CW) has been recognized globally as a form of nature-based solution (NBS) for water treatment technology. Aside from water detention, CW can also trap heavily-polluted sediments from the influent. This study mainly focused on the characterization of pollutants found in the sediments of two constructed wetlands treating runoff from different types of land uses. Combined sediment and water quality analyses were also conducted to determine the interrelationship between the two components of the CW. Experimental results showed that TN, TP, and COD concentrations from livestock CW sediments are higher as compared to agricultural CW due to the contributions of animal manure. It was also noted that pollutant-rich sediments were already removed in the settling basin, thus reducing the pollutant concentration of the sediments found on the succeeding cells in the CW. Finally, the interrelationship between water and sediment quality were impacted by mechanisms such as agitation and equilibration. The findings of this study can provide significant knowledge in understanding the mechanisms that can potentially affect the treatment efficiency of a CW. Additionally, effective maintenance methods and schedules can be devised following the identification of factors governing the treatment processes within the CW.
Nash Jett D.G. Reyes,Franz Kevin F. Geronimo,Marla Maniquiz-Redillas,홍정선,김이형 한국습지학회 2018 한국습지학회지 Vol.20 No.1
Laguna Lake is the largest inland fresh water body in the Philippines. It primarily serves as a site for aquaculture, hydropower, transportation, and water supply industries. Due to Laguna Lake’s diverse functionalities, competition among water users became prominent. Water quality began to deteriorate due to various pollutant contributions in this process, thereby affecting the soundness of the aquatic ecosystem. This study was conducted to evaluate the current water quality management policy from the viewpoint of ecological environment through the evaluation of the water quality of Laguna Lake. Concentrations of water pollutants such as ammonia (NH3), biochemical oxygen demand (BOD), chloride (Cl-), pH, and total suspended solids (TSS) exceeded the water quality standards of the Philippines’ Department of Environment and Natural Resources (DENR). The water quality of the lake was also affected by the pollutant load due to agriculture and urban stormwater runoff in the watershed. The salinity and contaminated water from Pasig River also affected the water quality of Laguna Lake. Long-term water quality analysis showed that the water quality of Laguna Lake is also influenced by rainfall-related seasonal variations. The results of the water quality analysis of Laguna Lake indicated that the environmental management techniques of the Philippines should be changed from the conventional water management into an integrated watershed management scheme in the future. It is therefore necessary to study and introduce advanced watershed management measures in the Philippines based from the policies of other developed countries.
( Nash Jett Reyes ),( Franz Kevin Geronimo ),전민수 ( Minsu Jeon ),이유경 ( Yookyung Lee ),김이형 ( Lee-hyung Kim ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Infiltration trenches (ITs) are LID facilities that utilize filtration and water retention capabilities to improve water quality and attenuate flooding conditions; however, clogging may reduce the efficiency of ITs over time. This study evaluated the pollutant removal efficiency and patterns of clogging in an urban stormwater IT. A total of 46 rainfall events from 2009 to 2019 were monitored to evaluate the physico-chemical properties of stormwater, including total suspended solids (TSS), total nitrogen (TN), and total phosphorus (TP) were analyzed based on the standard methods for the examination of water and waste water. Other toxic heavy metals commonly found in urban areas, such as iron (Fe), zinc (Zn), and cadmium (Cd), were also investigated using Inductively Coupled Plasma Mass Spectroscopy. Annual facility maintenance conducted to remove the accumulated sediments and determine the extent of clogging among the filter media layers. The IT successfully reduced the pollutant concentrations in stormwater runoff by 25% to 76%. The IT is equipped with sedimentation tank, allowing proper settlement of suspended particles in stormwater. Reduction in mean TN (47%) and TP (51%) concentrations can also be attributed to the effective removal of TSS, since nutrient compounds are bound on sediments. Despite the decreased concentrations, the removal efficiency of the system for Fe (66%), Zn (64%), and Cd (25%) was not significant (p>0.05). Whereas sedimentation or particle settling was not effective in removing heavy metals in stormwater, the filter media in the IT provided filtration and adsorption mechanisms to reduce heavy metal concentrations. The IT exhibited a 13% to 37% decline in pollutant removal performance for the first two years of operation without maintenance. After maintenance, the pollutant removal efficiency of IT increased by 1% to 22% due to the removal of particles clogging the media. This study presented the potential factors affecting the effectiveness of an IT filtration and infiltration device for managing stormwater runoff. Furthermore, the effects of maintenance activities were highlighted to devise an optimum maintenance scheme that can improve and optimize facility performance.
( Nash Jett Reyes ),( Franz Kevin Geronimo ),전민수 ( Minsu Jeon ),이유경 ( Yookyung Lee ),김이형 ( Lee-hyung Kim ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Infiltration trenches (ITs) are LID facilities that utilize filtration and water retention capabilities to improve water quality and attenuate flooding conditions; however, clogging may reduce the efficiency of ITs over time. This study evaluated the pollutant removal efficiency and patterns of clogging in an urban stormwater IT. A total of 46 rainfall events from 2009 to 2019 were monitored to evaluate the physico-chemical properties of stormwater, including total suspended solids (TSS), total nitrogen (TN), and total phosphorus (TP) were analyzed based on the standard methods for the examination of water and waste water. Other toxic heavy metals commonly found in urban areas, such as iron (Fe), zinc (Zn), and cadmium (Cd), were also investigated using Inductively Coupled Plasma Mass Spectroscopy. Annual facility maintenance conducted to remove the accumulated sediments and determine the extent of clogging among the filter media layers. The IT successfully reduced the pollutant concentrations in stormwater runoff by 25% to 76%. The IT is equipped with sedimentation tank, allowing proper settlement of suspended particles in stormwater. Reduction in mean TN (47%) and TP (51%) concentrations can also be attributed to the effective removal of TSS, since nutrient compounds are bound on sediments. Despite the decreased concentrations, the removal efficiency of the system for Fe (66%), Zn (64%), and Cd (25%) was not significant (p>0.05). Whereas sedimentation or particle settling was not effective in removing heavy metals in stormwater, the filter media in the IT provided filtration and adsorption mechanisms to reduce heavy metal concentrations. The IT exhibited a 13% to 37% decline in pollutant removal performance for the first two years of operation without maintenance. After maintenance, the pollutant removal efficiency of IT increased by 1% to 22% due to the removal of particles clogging the media. This study presented the potential factors affecting the effectiveness of an IT filtration and infiltration device for managing stormwater runoff. Furthermore, the effects of maintenance activities were highlighted to devise an optimum maintenance scheme that can improve and optimize facility performance.
Nash Jett DG. Reyes,Franz Kevin F. Geronimo,Hyeseon Choi,Minsu Jeon,Lee-Hyung Kim 대한환경공학회 2024 Environmental Engineering Research Vol.29 No.5
The terrestrial environment generally serves as an important carbon pool. This study mainly assessed the properties and carbon storage capabilities of soils from different urban land uses. Soil samples from roads/highways, parks, institutional areas, and constructed wetlands were collected to assess the effects of soil sealing on the characteristics and carbon content of urban soils. Soil sealing and compaction greatly influenced urban soil properties by altering the mass-balance, thereby resulting in a disproportionate amount of inflow and outflow of compounds in the soil strata. Using the Walkley-Black and loss-on-ignition (LOI) methods of soil organic carbon (SOC) analysis demonstrated that LOI-based analysis yielded up to 26 times higher SOC values than the wet-oxidation method due to the high weight losses prompted by the volatilization of hygroscopic and structural water and thermal decomposition of carbonate-containing minerals. Further analyses indicated that open soils contain 5% to 78% higher percentage of organic carbon as compared with their sealed counterparts and top soil layers tend to have higher amounts of SOC due to the continuous deposition of carbon-containing compounds from external sources. Generally, the results of this inquiry can serve as a baseline for formulating strategies to augment pedologic carbon stocks in urban environments.
( Nash Jett Reyes ),( Franz Kevin Geronimo ),전민수 ( Minsu Jeon ),이유경 ( Yookyung Lee ),김이형 ( Lee-hyung Kim ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Infiltration trenches (ITs) are LID facilities that utilize filtration and water retention capabilities to improve water quality and attenuate flooding conditions; however, clogging may reduce the efficiency of ITs over time. This study evaluated the pollutant removal efficiency and patterns of clogging in an urban stormwater IT. A total of 46 rainfall events from 2009 to 2019 were monitored to evaluate the physico-chemical properties of stormwater, including total suspended solids (TSS), total nitrogen (TN), and total phosphorus (TP) were analyzed based on the standard methods for the examination of water and waste water. Other toxic heavy metals commonly found in urban areas, such as iron (Fe), zinc (Zn), and cadmium (Cd), were also investigated using Inductively Coupled Plasma Mass Spectroscopy. Annual facility maintenance conducted to remove the accumulated sediments and determine the extent of clogging among the filter media layers. The IT successfully reduced the pollutant concentrations in stormwater runoff by 25% to 76%. The IT is equipped with sedimentation tank, allowing proper settlement of suspended particles in stormwater. Reduction in mean TN (47%) and TP (51%) concentrations can also be attributed to the effective removal of TSS, since nutrient compounds are bound on sediments. Despite the decreased concentrations, the removal efficiency of the system for Fe (66%), Zn (64%), and Cd (25%) was not significant (p>0.05). Whereas sedimentation or particle settling was not effective in removing heavy metals in stormwater, the filter media in the IT provided filtration and adsorption mechanisms to reduce heavy metal concentrations. The IT exhibited a 13% to 37% decline in pollutant removal performance for the first two years of operation without maintenance. After maintenance, the pollutant removal efficiency of IT increased by 1% to 22% due to the removal of particles clogging the media. This study presented the potential factors affecting the effectiveness of an IT filtration and infiltration device for managing stormwater runoff. Furthermore, the effects of maintenance activities were highlighted to devise an optimum maintenance scheme that can improve and optimize facility performance.