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Marine macro-litter sources and ecological impact: a review

environmental Chemistry Letters 2024年第3期22卷 1257-1273页

作者： Le, Van-Giang Nguyen, Hoang-Lam Nguyen, Minh-Ky Lin, Chitsan Hung, Nguyen T. Quang Khedulkar, Akhil P. Hue, Nguyen K. Trang, Phung T. Thu Mungray, Arvind Kumar Nguyen, D. Duc Central Institute for Natural Resources and Environmental Studies Vietnam National University Hanoi111000 Viet Nam Department of Civil Engineering McGill University MontrealQC Canada Faculty of Environment and Natural Resources Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc City Ho Chi Minh City700000 Viet Nam Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Biomedical Engineering and Environmental Science National Tsing Hua University Hsinchu30013 Taiwan Environmental Research Center Institute of Hydrology and Meteorology Science and Climate Change Hanoi111000 Viet Nam Department of Chemical Engineering Sardar Vallabhbhai National Institute of Technology Gujarat Surat395007 India Department of Civil and Energy System Engineering Kyonggi University Suwon16227 Korea Republic of Institute of Applied and Sustainable Technology Nguyen Tat Thanh University Ho Chi Minh City700000 Viet Nam

Marine pollution by various debris is rising in the context of increasing urbanization, industrialization and worldwide trade. Here, we review marine macro-litter with focus on sources, abundance, distribution, and impact on aquatic wildlife, human health, and the economy. We observe that about 75–80% of marine litter originates from land-based sources, including poorly managed landfills and improper disposal. Macro-litter ingestion by marine life is of growing concern, in particular concerning the presence of plastics and associated pollutants, e.g., bisphenol A and phthalates, in fishes. These pollutants are accumulated and transferred to human via seafood. Marine plastic pollution induces a substantial rise of economic costs due to the decline of ecosystem services. Mitigation of marine plastic pollution should be done by following the ten Rs principles of refuse, rethink, reduce, re-use, repair, refurbish, remanufacture, repurpose, recycle, and recover. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

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Contribution of Manggarai gate improvement to flood in Manggarai Village based on recorded flood event 5

Contribution of Manggarai gate improvement to flood in Mangg...

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5th International Seminar on Sustainable Urban Development, ISoSUD 2020

作者： Kesuma, T.N.A. Saputra, D. Farid, M. Kusuma, M.S.B. Kuntoro, A.A. Civil Engineering Doctoral Program Faculty of Civil and Environmental Engineering Bandung Institute of Technology Jawa Barat Bandung Indonesia Civil Engineering Master Program Faculty of Civil and Environmental Engineering Bandung Institute of Technology Jawa Barat Bandung Indonesia Water Resources Engineering Research Group Faculty of Civil and Environmental Engineering Bandung Institute of Technology Jawa Barat Bandung Indonesia Center for Coastal and Marine Development Institut Teknologi Bandung Jawa Barat Bandung Indonesia

Manggarai Gate is one of the most important flood control structures of the Jakarta Flood Control System. Its performance capacity is a compulsory parameter for flood risk reduction of the Jakarta Flood Prone Area. This paper aims to evaluate the contribution of the capacity improvement of Manggarai Gate to reduce the flood hazard at Manggarai flood-prone areas located in the upper part of this gate. An additional gate section was conducted in 2015 as the structural flood hazard reduction effort to increase the capacity of this gate from 330 m3/s to 507 m3/s. Recorded floods characteristic event before and after this improvement was compared to determine the flood hazard changes during the flood observation period. Based on this determination results it is found that the contribution of the increment capacity of Manggarai gates in reducing the flood hazard depends on the sustainability of the river capacity, river water quality, and flood control operation. It could also be concluded the sustainability of the river capacity and river water quality is very sensitive to the social behavior of the community and the river stakeholder along the river catchment area in addressing the environmental condition of the river catchment area. © Published under licence by IOP Publishing Ltd.

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Kinetic Behaviors and Nitrite Accumulation of Thiosulfate Autotrophic Denitrification Process

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SSRN 2024年

作者： Chang, Jenting Septiariva, Iva Yenis Yang, Youren Chuang, Shun-Hsing Graduate Institute of Environmental Engineering National Central University Taoyuan City32001 Taiwan Civil Engineering Study Program Sebelas Maret University Surakarta57126 Indonesia

Exploration of the effects of different S/N ratios on the accumulation of NO2-N in the autotrophic denitrification process is crucial due to no need for an external organic carbon supply. Herein, thiosulfate-driven autotrophic denitrification (SADN) was established in a sequencing batch reactor treating nitrate-containing wastewater. The long-term and batch tests observed that when sufficient thiosulfate was present, the branched thiosulfate oxidation (BTO) reaction occured. Therefore, the sulfur-to-nitrogen (S/N) molar ratio had to be maintained over 2.19 to provide enough electron donors for complete denitrification with SNaRR of 13.13 mg NO3-N/g ***. If the S/N molar ratio declined to 1.75, some nitrite accumulation would utilize the stored elemental sulfur. SNiRR increased from 0.4 – 20.1 mg NO2-N/g *** when the S/N ratio rose from 1.46 to 4.38. Under a sufficient S/N ratio, the change in nitrogen concentration followed a zero order reaction. The microbial analysis identified Desulfobacterota as key microbes, with autotrophic denitrifying bacteria accounting for more than 70%. © 2024, The Authors. All rights reserved.

关键词： Denitrification

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Use of Digital Elevation Model for Detecting Airfield Pavement Distress

Use of Digital Elevation Model for Detecting Airfield Paveme...

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2023 International Conference on Airfield and Highway Pavements

作者： All Sourav, Md. Abdullah Ceylan, Halil Kim, Sunghwan Brooks, Colin Peshkin, David Dobson, Richard Brynick, Matthew Dept. of Civil Construction and Environmental Engineering Iowa State Univ. AmesIA United States Dept. of Civil Construction and Environmental Engineering Program for Sustainable Pavement Engineering and Research Iowa State Univ. AmesIA United States Program for Sustainable Pavement Engineering and Research Institute for Transportation Iowa State Univ. AmesIA United States Michigan Tech Research Institute Ann ArborMI United States Applied Pavement Technology Inc. UrbanaIL United States Federal Aviation Administration Airport Pavement R&D Section NJ United States

ISBN: (数字)9780784484906

ISBN: (纸本)9780784484906

A digital elevation model (DEM) is a topographic representation of a bare surface, usually referring to the Earth's surface. DEMs have been used for flood assessment, landside hazard detection, soil properties' quantification, road and highway planning, etc. Recently, DEMs generated using small unmanned aircraft systems (sUAS) have shown potential in transportation infrastructure inspection. In this study, we evaluated the performance of sUAS-collected DEM data to detect airfield pavement distresses. Natural-color red-green-blue (RGB) data were collected from both Portland cement concrete (PCC) and asphalt concrete (AC) pavements at three airports with UAS. The data were processed to generate an RGB optical orthophoto using close-range photogrammetry, and one product of that process was a DEM representing the airfield pavement in three-dimensional space. The resolution of the generated DEMs varied from 2.8 mm/pix to 84 mm/pix based on sUAS sensors, flying altitude, and parameters selected for RGB data processing. The DEMs were studied for their usefulness in visually identifying 14 PCC pavement distresses and nine AC pavement distresses. Analysis showed that DEM with 6 mm/pix resolution or better can be useful for detecting one or more severity levels of 13 PCC pavement distresses and 6 AC pavement distresses. High-resolution DEMs were also useful in identifying distresses related to elevation differences, such as shoving, depression, and faulting. This study illustrates the potential of DEM data in airfield pavement distress detection. © ASCE 2023. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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Mechanical Properties of Hydraulic Concretes with Partial Replacement of Portland Cement by Pozzolans Obtained from Agro-Industrial Residues: A Review

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SSRN 2024年

作者： De Jesus Torres-Ortega, Ramon Torres-Sanchez, Diego Luis Lopez-Lara, Teresa Civil Engineering Program University of Cartagena Cartagena de Indias130015 Colombia Department of Civil and Engineering Environmental Engineering Florida International University United States Faculty of Engineering Autonomous University of Queretaro Qro Santiago de Queretaro76010 Mexico

The following article presents an overview of the research conducted on the use of pozzolans obtained from agro-industrial by-products such as rice husk, palm oil husk, and sugarcane bagasse. The improvements these pozzolans provide in the mechanical properties of compressive, flexural, and tensile strength in concretes with percentages of substitution of conventional Portland cement by these materials have been investigated. This situation is mainly due to their high content of amorphous silica that reacts with calcium hydroxide, when the hydration of Portland cement begins, giving rise to the production of calcium silicate hydrate (CSH) gel, with cementitious properties. In this way, an analysis of the chemical properties of these pozzolans is presented based on their basic oxide content, in particular, the amorphous silica they contain and their reactive activity. Thus, the influence of the temperature and grinding processes used to obtain it will be considered, finding that the optimal temperatures for obtaining amorphous silica range between 600°C and 700 °C. On the other hand, the optimal replacement doses to improve the mechanical properties of concretes are between 10% and 20% replacement. © 2024, The Authors. All rights reserved.

关键词： Tensile strength

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A Retrospective Evaluation of the Performance of the Lower San Fernando Dam

A Retrospective Evaluation of the Performance of the Lower S...

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Geo-Extreme 2021: Climatic Extremes and Earthquake Modeling

作者： Mccann, Martin W. Mehta, Jinal Jainesh Davis, Craig A. Freyberg, David L. National Performance of Dams Program Dept. of Civil and Environmental Engineering Stanford Univ United States Dept. of Civil and Environmental Engineering Stanford Univ United States CA Davis Engineering United States

As a result of the M 6.7 1971 San Fernando earthquake the Lower San Fernando Dam (LSFD) suffered significant damage that could have resulted in a breach and uncontrolled release of the reservoir (URR). The damage to the LSFD was a result of liquefaction that led to a massive slide on the upstream slope into the reservoir. The slide lowered the crest of the dam well below the reservoir level. However, a section of the downstream slope remained, with about 5 ft of freeboard. Fortunately, aftershocks did not cause further significant damage and the reservoir was lowered soon after the earthquake, avoiding URR into the heavily populated San Fernando Valley below. Experience suggests that system failures are a result of a combination of events or circumstances (a sequence of events) that collectively conspire to produce the outcome that occurred. This study takes a retrospective look at the events at the LSFD as a result of the 1971 earthquake to assess just how rare (in terms of its annual frequency of occurrence) it was. This retrospective look at the 1971 earthquake provides insights and lessons for conducting prospective seismic risk studies in the future. © 2021 American Society of civil Engineers (ASCE). All rights reserved.

关键词： Reservoirs (water)

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Health Risk Assessment of Physicochemical and Heavy Metals Exposures of the Usage of Shallow Groundwater Located at the Proximity to Citarum River, Indonesia

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SSRN 2024年

作者： Salami, Indah Rachmatiah Siti Thufailah, Nadya Aulia Environmental Management Technology Research Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jalan Ganesa no. 10 Bandung40132 Indonesia Environmental Engineering Master Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jalan Ganesa no. 10 Bandung40132 Indonesia Center for Environmental Studies Institut Teknologi Bandung Jalan Sangkuriang no. 42A Bandung40135 Indonesia

The study evaluates shallow groundwater quality from agricultural, industrial, and domestic areas within 150m of the Citarum River, focusing on anthropogenic pollution. Measurements included physicochemical, heavy metals, and microbiological parameters. Heavy metals pose significant health risks, with Pb inversely correlated to distance from the riverbank. Non-carcinogenic risk indicates water is only safe for dermal exposure, while carcinogenic risk shows unacceptable levels even for dermal contact, with Cd presenting the highest risk. Health risks are ranked as agricultural > industrial > domestic areas, with minimum safe distances from the riverbank being industrial > agricultural > domestic areas. © 2024, The Authors. All rights reserved.

关键词： River pollution

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Geophysical Constraints on Decarbonized Systems—Building Spatio-Temporal Uncertainties into Future Electricity Grid Planning

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Current Sustainable/Renewable Energy Reports 2023年第4期10卷 218-233页

作者： Chowdhury, Afm Kamal Wild, Thomas Deshmukh, Ranjit Iyer, Gokul Galelli, Stefano Earth System Science Interdisciplinary Center University of Maryland College ParkMD20740 United States College ParkMD20740 United States Environmental Studies Program University of California Santa Barbara Santa BarbaraCA93106 United States Bren School of Environmental Science and Management University of California Santa Barbara Santa BarbaraCA93106 United States School of Civil and Environemntal Engineering Cornell University IthacaNY14853 United States

Purpose of Review: Future electricity grids will be characterized by the high penetration of renewables to support the decarbonization process. Yet, this transition will further expose grids to a broad spectrum of geophysical forces, such as weather and climate or the availability of land and minerals. Here, we synthesize the current body of knowledge on the relationship between geophysical constraints and electricity grid planning. Recent Findings: We show that there have been promising advances in the data, methods, and modelling tools needed to incorporate the effect of geophysical constraints on demand, resource availability, and grid operations. However, current research efforts are typically focused on the effect of a single constraint, thereby lacking a broader view of the problem. Summary: More system-specific and finer-scale analyses are necessary to better understand how spatio-temporal variability in geophysical forces affects grid planning. Moreover, we need a broader focus on the multi-sectoral implications of decarbonization efforts, including the societal consequences of grid management decisions. Importantly, all these efforts are challenged by the computational requirements of existing power system models, which often limit our ability to characterize uncertainty and scale analyses across larger domains. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Uncertainty analysis

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Meeting sustainable aviation fuel policy targets through first generation corn biorefineries

Meeting sustainable aviation fuel policy targets through fir...

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作者： Batten, Rahamim Galant, Or Karanjikar, Mukund Spatari, Sabrina Faculty of Civil and Environmental Engineering Technion – Israel Institute of Technology Haifa3200003 Israel Technology Holding Salt Lake CityUT84119 United States Grand Technion Energy Program Technion – Israel Institute of Technology Haifa3200003 Israel

This paper investigates options to produce low carbon and renewable aviation fuel through existing commercial first generation biorefineries, which could be strategic given the rapid growth of the electric vehicle market for personal mobility. We evaluate the environmental impact of retrofitting a first generation biorefinery to produce aviation fuel through chemical process simulation. The analysis investigates the potential for reducing greenhouse gas (GHG) emissions and displacing fossil fuel (petroleum-based jet kerosene) in the aviation fuel industry through using corn feedstocks in dry grind biorefineries to convert sugars to 1,4-dimethylcyclooctane (DMCO), which qualifies as renewable jet-A fuel blend and is infrastructure compatible. The average life cycle GHG emissions for a baseline case and a scenario with carbon capture and storage (CCS) of fermentative CO2 are 36 and 5 g CO2 e/MJ DMCO, respectively. Investment in CCS at the biorefinery and adoption of crop best management practices on farms are essential for mitigating the risks of induced land use change GHG emissions for existing corn biorefineries. DMCO as a low-carbon aviation fuel could be a strategic fuel product for retrofitting existing corn dry grind facilities. For aviation fuel supply, corn dry grind facilities could displace about 12 % of jet fuel demand in the near term, which would meet sustainable aviation fuel policy targets. We conclude that corn-to-DMCO shows promise for near-term low-carbon fuel markets in the aviation industry and as a bridge to developing biomass-based jet fuel in the future. © 2022 Elsevier Ltd

关键词： Greenhouse gases

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The dependence in microcystin removal with powdered activated carbon on variant properties, carbon properties, and dissolved organic matter

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Chemosphere 2024年 351卷 141205页

作者： Huang, Yuzhou Lenhart, John J. Environmental Science Graduate Program The Ohio State University United States Department of Civil Environmental and Geodetic Engineering The Ohio State University United States

Powdered activated carbon (PAC) is commonly used by water treatment plants to remove harmful cyanotoxins such as microcystins (MCs) produced during seasonal harmful algal blooms. MC removal by PAC depends upon the properties of the PAC, the properties of the MC variant, and the presence and properties of dissolved organic matter (DOM). To identify which of these factors has the greatest impact on the removal of MC by PAC, we evaluated the removal of four different MC variants (MC-LR, MC-LA, MC-RR and desmethylated MC-RR) by three different PAC types (wood-based, coal-blend and coal-based). The role of DOM properties was evaluated using DOM isolated from two different sources, a terrestrial source (Suwannee River Fulvic Acid, SRFA) and a microbial source (Grand Lake St Marys DOM, GLSM). The results of adsorption experiments conducted over a period of 72 h demonstrated the wood-based PAC, which had the highest surface area and mesopore volume of the PAC tested, had the highest adsorption rate and capacity for all four MC variants. Of the variants studied, neutrally charged MC-RR was adsorbed more rapidly and to a greater extent on all of the PAC types than were the other variants. Although MC-LA and MC-LR had the greatest hydrophobicity, their negative charges resulted in their being adsorbed the least. As expected, DOM inhibited microcystin adsorption to PAC. The degree of inhibition, however, did not significantly vary for the two DOM types evaluated, indicating the properties of the DOM on MC adsorption to PAC was less important than the PAC properties or MC variant properties. Overall, PAC properties were a more important factor in MC removal than were the MC properties or DOM conditions. © 2024 Elsevier Ltd

关键词： Adsorption DOM Kinetic Mesopores Microcystin PAC

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