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Design of a Central Tool for Sustainability Evaluation and Weighting to Decision-Making Support of Contaminated Soils Remediation

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SSRN 2023年

作者： Braun, Adeli Beatriz Visentin, Caroline Thomé, Antônio Graduate Program in Civil and Environmental Engineering University of Passo Fundo BR 285 São José Rio Grande do Sul Passo Fundo99052-900 Brazil

Sustainable remediation remains unstandardized and ambiguously regulated, thereby limiting its adoption in the management of contaminated areas. Although a considerable number of tools are available for this purpose, numerous shortcomings continue to be detected, especially with regard to the integration of a complete assessment of impact and sustainability into a single framework. In view of these problems, this study developed and validated an integrated tool for assessing the sustainability of remediation techniques for contaminated soils. To support the sustainability analysis, we prepared impact assessment matrices, which list components and criteria for obtaining integrated impact scores for each sustainability dimension/pillar (i.e., social, economic, and environmental), factor, and component. These impact scores were incorporated and fitted into a mathematical model used to ascertain the sustainability of the techniques. The tool was subsequently validated by comparing and analyzing the sustainability with which five techniques: phytoremediation, electrokinetics and excavation/disposal (Case Study I), nanoremediation and soil washing (Case Study II). The techniques’ probabilities of sustainability followed the order presented in the preceding statement. The determination of sustainability was supported by the direct interaction between the effects derived under each dimension and technique. These findings led to the conclusion that the proposed tool prioritizes the basic principles of sustainability, which call for harmony among the three pillars, and that it is a favorable instrument for the evaluation and selection of a sustainable remediation technique. © 2023, The Authors. All rights reserved.

关键词： Sustainable development

Design of a Central Tool for Sustainability Evaluation and Weighting to Decision-Making Support of Contaminated Soils Remediation

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SSRN 2023年

关键词： Sustainable development

Flood Modelling for an Urban Indian Catchment: Challenges and Way Forward

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Flood Modelling for an Urban Indian Catchment: Challenges an...

Virtual Conference on Disaster Risk Reduction, VCDRR 2021

作者： Ghosh, Mousumi Karmakar, Subhankar Ghosh, Subimal Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Mumbai400076 India Environmental Science and Engineering Department Indian Institute of Technology Bombay Mumbai400076 India Centre for Urban Science and Engineering Indian Institute of Technology Bombay Mumbai400076 India Department of Civil Engineering Indian Institute of Technology Bombay Mumbai400076 India

ISBN: (纸本)9789811655005

The current study aims to develop a holistic hydrodynamic flood modelling framework for the Mithi catchment of Mumbai city, India, which is subjected to flooding almost every year causing huge losses and inconvenience. A one-dimensional flood model (MIKE 11) which accounts for the river discharge along with stormwater drainage discharge is coupled with a two-dimensional flood model (MIKE 21) which simulates the overland flow in the MIKE FLOOD platform along with the major flood influencers such as rainfall and tidal elevation to develop a three-way coupled flood modelling framework. The flood parameters obtained from this framework are translated into flood inundation maps which account for flood depth and flood hazard maps which account for flood depth along with spatial velocity and can help to identify the potential areas at risk. However, hydrodynamic flood modelling is highly data-intensive and requires good resolution meteorological, hydraulic, and topographical data sets. Therefore, the unavailability of long-term and reliable data sets in developing and underdeveloping countries cause a major hindrance for modelling in such catchments. The current study also adapts alternate robust methods to address the challenge of data scarcity of rainfall, discharge, tidal elevation, and drainage network. The proposed framework and methods are generic and can be incorporated in similar data-scarce urban catchments for effective flood management. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Hydrodynamics

The Effects of Calcium Carbonate on Sodium Metasilicate-Activated Metakaolin-Based Geopolymer Pastes

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SSRN 2024年

作者： Ren, Jie Cansu, B. Acarturk Dowdy, Nicolas D. Srubar, Wil V. Department of Civil Environmental and Architectural Engineering University of Colorado Boulder 1111 Engineering Drive ECOT 441 UCB 428 BoulderCO80309 United States Materials Science and Engineering Program University of Colorado Boulder 4001 Discovery Drive BoulderCO80303 United States

The influence of calcium carbonate (CaCO3) on the alkali-activation kinetics, microstructure, and compressive strength of alkali-activated metakaolin (MK) geopolymer was investigated. Experimental results showed that replacing 10-50% of MK with CaCO3 particles delayed the acceleration stage of alkali-activation regardless of replacement amount. However, 10% CaCO3 increased the overall degree of reaction and yielded pastes with similar 14- and 28-day compressive strengths compared to the control without CaCO3 addition. In comparison, 50% CaCO3 replacement led to a lower overall degree of reaction and compressive strengths through 28 days of curing. Experimental evidence substantiates that N-A-S-H gel forms in samples containing 0% and 10% CaCO3, while N-(C)-A-S-H gel and/or C-(N)-A-S-H are also present in the binding matrix near CaCO3 particles in samples with higher CaCO3 contents. While CaCO3 particles were primarily composed of calcite, vaterite was also evident given higher CaCO3 contents, suggesting that the CaCO3 particles were reactive during the alkali-activation. © 2024, The Authors. All rights reserved.

关键词： Calcium carbonate

High-Fidelity Numerical Simulations of a Standing-Wave Thermoacoustic Engine

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SSRN 2023年

作者： Blanc, Nathan Laufer, Michael Frankel, Steven Ramon, Guy Z. Grand Technion Energy Program Haifa32000 Israel Faculty of Civil and Environmental Engineering Techniom Haifa32000 Israel Faculty of Mechanical Engineering Technion Haifa32000 Israel Technion - Israel Institute of Technology

Thermoacoustic devices, in which heat fluxes and pressure waves are converted from one to the other, are a promising class of energy conversion, particularly as heat-driven heat pumps. However, accurate simulation and performance prediction of these devices is a major challenge on the path to better understanding and improved ***, 2D simulations of a high-amplitude standing wave thermoacoustic engine are reported, based on the high-fidelity software PyFR. The performed simulations are validated against both computational and experimental results reported in the literature, exhibiting a deviation of less than 9% between the calculated and experimentally measured pressure amplitude, more than twice as accurate as previously reported calculations. Further, non-linear effects in the thermoacoustic engine are explored and discussed, including Rayleigh streaming, jet streaming and, importantly, higher-order harmonics. The influence of these effects on engine performance is gauged, with higher-order harmonics shown to cause the greatest reduction in engine performance. Harmonics suppression is then demonstrated, via a simple example, to improve performance and, in the present context, greatly reduce the deviation between the linear and non-linear *** work demonstrates the utility of high-order CFD schemes for the analysis of thermoacoustics devices, providing useful insight on the importance of non-linear effects and highlighting the potential benefits of future work along similar lines © 2023, The Authors. All rights reserved.

关键词： Computational fluid dynamics

Enhancing field-scale bioremediation of weathered petroleum oil-contaminated soil with biocompost as a bulking agent

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Case Studies in Chemical and environmental engineering 2024年 9卷

作者： Helmy, Qomarudin Kardena, Edwan Environmental Engineering Study Program Institute of Technology Bandung Ganesa St. No. 10 West Java Bandung Indonesia Water and Wastewater Engineering Research Group Faculty of Civil and Environmental Engineering Institute of Technology Bandung Ganesa St. No. 10 West Java Bandung Indonesia

The field-scale cleanup of weathered petroleum oil-contaminated soils from the Minas Oil Fields in Indonesia was investigated using landfarming bioremediation technology. Sawdust produced from palm fronds, trunks, and bushes was used as a bulking agent, fermented with manure from cow, goat, and chicken dung as amylolytic and cellulolytic source microflora. Petrophylic bacteria known for their capability to degrade PAH were used as augmented microflora along with stimulated local indigenous microflora overgrown onsite. The findings demonstrated that, albeit at varying rates, the inoculum of native and augmented microflora raised the total colony-forming units (CFU) and the rate at which total petroleum hydrocarbons (TPH) were degraded in all contaminated soils treated in the soil bioremediation facilities (SBF). After 150 days of bioremediation operation, the bioremediation process for petroleum oil-contaminated soil effectively eliminated 165.79 kg of TPH from 2565 cubic meters of contaminated soil, with a recovery cost of 161 USD per cubic of treated soil. The initial average TPH concentration in the soil was 64,799 ± 9373 mg/kg and decreased to a lower concentration of 163 ± 74 mg/kg after bioremediation was completed. Both native and augmented petrophilic microflora showed significant growth over tenfold, with an average number of colonies at the initial stage of the bioremediation process ranging from 5.9 × 10⁵ to 6.6 × 10⁶ CFU per gram of soil. We show that a practical and affordable bioremediation technique is the onsite production of petrophylic microflora (both native and augmented) and compost from locally available biomass waste. © 2024 The Authors

关键词： Bioaugmentation Biocompost Bioremediation Field-scale Petroleum Petrophylic

Determination of Dielectric Properties of Plaster Blocks for Sealing Masonry Using Frequency Scanning Methods

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SSRN 2023年

作者： Praxedes, Maria Elizabeth Teixeira Santana Duarte, José G. de Medeiros Gurgel Pinto, Erica Natasche Cabral, Kleber Cavalcanti Silva Neto, Valdemir P. D’Assunção, Adaildo G. Graduate Program in Civil and Environmental Engineering Federal University of Rio Grande do Norte RN Natal Brazil Department of Communication Engineering Federal University of Rio Grande do Norte RN Natal Brazil

With the increasing use of traditional and new models of wireless communication systems, the study and determination of the electrical characteristics of materials used in civil construction is an important topic to establish an understanding of how the radio frequency signal behaves inside built environments. This study presents an extensive process of characterization of electrical parameters of plaster blocks used in the construction of walls. Analyses are made in the frequency range from 0.7 to 5.2 GHz, which has been used for several wireless communication standards. To carry out the electrical characterization of dielectric materials, a non-invasive methodology is proposed based on an innovative combination of the Nicolson–Ross–Weir Method (NRW) and the Ray Tracing Method. Through the proposed methodology and an extensive campaign of measurements using frequency scanning equipment, calculated and experimental data of Shielding Effectiveness (SE), complex relative electrical permittivity, loss tangent, attenuation coefficient and conductivity were obtained for a wide range of frequency, considering different samples of (gypsum?) plaster blocks. The obtained results are compared to those available in the related literature, confirming the accuracy of the proposed analysis. © 2023, The Authors. All rights reserved.

关键词： Ray tracing

Study of Machine Learning Techniques for Damage Identification in a Beam 10th

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Study of Machine Learning Techniques for Damage Identifica...

10th International Conference on Wave Mechanics and Vibrations, WMVC 2022

作者： da Silva Coelho, Jefferson de Sousa, Amanda Aryda Silva Rodrigues Machado, Marcela Rodrigues Dutkiewicz, Maciej Department of Mechanical Engineering University of Brasília Campus Universitário Darcy Ribeiro Faculdade de Tecnologia - Asa Norte DF Brasília Brazil Post-Graduate Program - Integrity of Engineering Materials University of Brasília Campus Universitário Darcy Ribeiro Faculdade de Tecnologia - Asa Norte DF Brasília70910-900 Brazil Faculty of Civil Environmental Engineering and Architecture University of Science and Technology Bydgoszcz85-796 Poland

ISBN: (纸本)9783031157578

Damage is defined as any change to the material, geometry or boundary condition that can modify the structure’s properties or response. In the past, damage identification was performed through periodical inspection, non-destructive testing/non-destructive evaluation, or visual observation. Structural health monitoring (SHM) has emerged to transition from offline damage identification to near real-time and online damage assessment. Hence, SHM is a damage detection strategy to monitor a structure for a period using a series of continuous measurement devices, which then collect the system’s characteristics and subsequently perform statistical analysis to assess the current circumstances and health of the structure. One of the first steps for the study of SHM is damage detection followed by monitoring. Machine Learning (ML) techniques can be used to develop viable algorithms to make potential predictions. ML algorithms are therefore providing the tools needed to enhance the capabilities of SHM systems and provide intelligent solutions to past challenges. Preliminary studies have reviewed that the extension of ML into SHM has dramatically increased the system’s capabilities, providing innovative solutions to different research challenges. This work conducts a study of the use of ML to identify damage in a beam and discuss the challenge of usage, performance and implementation of each technique. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Decision trees

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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Case Studies in Chemical and environmental engineering 2025年 11卷

作者： Salami, Indah Rachmatiah Siti Thufailah, Nadya Aulia Fahimah, Nurul Roosmini, Dwina Environmental Management Technology Research Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jalan Ganesa no. 10 Bandung 40132 Indonesia Environmental Engineering Master Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jalan Ganesa no. 10 Bandung 40132 Indonesia Center for Environmental Studies Institut Teknologi Bandung Jalan Sangkuriang no. 42A Bandung Indonesia Research Center for Environmental and Clean Technology National Research and Innovation Agency Indonesian (BRIN) KST Samaun Samadikun Jl Sangkuriang No. 21 West Java Bandung 40135 Indonesia

Shallow groundwater is commonly used for daily needs in Indonesia, and the water quality is affected by surrounding land uses with anthropogenic activities. The study aimed to evaluate shallow groundwater quality and public health risks. 51 groundwater samples located <150 m from the river were collected from agriculture, industrial, and domestic areas along the Upper Citarum River, supporting millions of people's activities. Physicochemical, heavy metals and microbiological parameters were measured. Water quality was compared to the government standards, and the statistical correlation and Principal Component Analysis were used to analyze the potential sources. The health risk was estimated using the Hazard Quotient, Hazard Index, and Excess Cancer Risks approach. The results showed that some heavy metals contaminated shallow groundwater were the dominant source of health risk. Pb concentration has statistically inversely correlated with distance from the river. Non-carcinogenic risk of children is higher than that in adults, with the rank of agriculture > industrial > domestic regions, and only suitable for dermal exposure. Meanwhile, the carcinogenic risk is unacceptable for both dermal and oral intakes and risk in agriculture > industrial > domestic areas. Higher distance from the river shows decreasing risk values, and the estimated safe distance from the river follows the sequences of industrial > agriculture > domestic area affected by the hydrogeological condition and flooding prone in industrial areas. These findings underscore the potential impact on public health and the urgency of addressing this issue through pollution source prevention, buffer-safe distance management, and education for the public. © 2025 The Authors

关键词： Agricultural ECR Groundwater distance to river HI Industrial Land uses Residential areas Shallow wells