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Navigating the nuclear tide: A comprehensive review of challenges, opportunities, and advances in managing marine contamination by radioactive contaminants

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Marine Pollution Bulletin 2025年 217卷 118113页

作者： Giwa, Adewale Eniola, Jamiu O. Salem, Ayesha Bilal Alshamsi, Aysha Ali Omar, Kinda Amin Alnuaimi, Noor Saleh Al-Fahad, Sara Ghazwan Rashed, Lulwa Ammar Chemical and Water Desalination Engineering Program Department of Mechanical and Nuclear Engineering University of Sharjah P.O. Box 27272 Sharjah University City United Arab Emirates Civil and Environmental Engineering Department Khalifa University Abu Dhabi United Arab Emirates

Since the 2011 Fukushima Daiichi Nuclear Power Plant (FDNPP) disaster, which resulted in the widespread release of radionuclides into the marine environment, there have been ongoing concerns about the long-term ecological and human health risks associated with such events. This review investigates the sources, transport mechanisms, and environmental impacts of key radionuclides, including cesium-137, strontium-90, plutonium isotopes, and tritium, which persist in marine ecosystems. The economic consequences of contamination and gaps in enforcement highlight the need for robust regulatory frameworks. Advancements in nuclear wastewater treatment technologies are explored, focusing on adsorption, membrane filtration, bioremediation, phytoremediation, ion exchange, the Advanced Liquid Processing System (ALPS), and hybrid approaches. Adsorption using nanomaterials, mesoporous silica, and waste-based adsorbents demonstrates high radionuclide removal efficiency, while membrane technologies such as reverse osmosis and forward osmosis offer promising solutions, particularly for tritium separation. Hybrid systems integrating adsorption and membrane filtration emerge as the most effective treatment strategies due to their scalability and enhanced radionuclide recovery. A comparative SWOT analysis underscores the advantages and limitations of each technology, emphasizing the need for continued research into real-world applications, predictive modeling, and continuous monitoring. The review also examines advanced modeling techniques, including hydrodynamic simulations and radionuclide diffusion models, to assess contaminant dispersion and bioaccumulation patterns. Additionally, international regulatory frameworks, including guidelines from the International Atomic Energy Agency (IAEA) and national policies on nuclear wastewater disposal, are analyzed. Case studies from the Haiyang and Pilgrim Nuclear Power Stations provide practical insights into treatment applications and risk

关键词： Marine pollution

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Potential recovery of precious metals from waste laptops in Jordan

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Rare Metals 2015年第7期34卷 517-521页

作者： Mohammad A.T.Alsheyab Program Manager of Civil and Environmental Engineering Qatar Foundation

To achieve a sustainable development in the electronic and electrical equipment(EEE) industry, it is necessary to protect the available natural *** addition, to satisfy the increasing demand on EEE, it is necessary to provide alternative sources of raw *** this paper, laptops were imported to Jordan in 2011 as an example to show the potential recovery of metals and precious metals from high grade waste electronic and electrical equipment by conducting a mass flow rate analysis using the STAN *** results show that considerable amounts of gold, silver, cobalt, palladium,and copper could be *** will reduce the amounts needed from primary natural resources and offset the CO2 emissions produced from mining the primary raw material resources.

关键词： Precious metals Laptops Waste of electronic and el

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Communal-based domestic rainwater harvesting system: A novel approach to alternative solutions for increasing water supply and recharging groundwater in Jagakarsa urban area, South Jakarta

Case Studies in Chemical and Environmental Engineering

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Case Studies in Chemical and environmental engineering 2025年 11卷

作者： Suprapti, Suprapti Kusuma, Muhammad Syahril Badri Kardhana, Hadi Cahyono, Muhammad Juliana, Imroatul Chalimah Doctoral Program of Civil Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jl. Ganesha No. 10 Jawa Barat Bandung 40132 Indonesia Water Resources Engineering Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jl. Ganesha No. 10 Jawa Barat Bandung 40132 Indonesia Civil Engineering Department Faculty of Engineering and Sciences Ibnu Khaldun Bogor University Jl. Sholeh Iskandar Km. 2 Jawa Barat Kota Bogor 16162 Indonesia Research Center for Ecohydrology Ecohydraulics and Engineering Science Bandung Jl. Babakan Jeruk 1 No. 100 Jawa Barat Bandung 40132 Indonesia Civil Engineering Study Program Sriwijaya University Jl. Raya Lintas Timur Palembang - Prabumulih No. Km. 32 Indralaya Indah South Sumatra Indralaya Indonesia Study Program of Civil Engineering Faculty of Engineering Universitas Mercu Buana Jl. Meruya Selatan No. 01 Kembangan-Jakarta Barat Jakarta 11650 Indonesia

This study proposes a new approach, a communal-based domestic rainwater harvesting (CDRWH) system, which is a new model that combines domestic and communal rainwater harvesting systems. This model is an alternative solution to improve system performance and utilize rainwater overflow from the system. Rainwater runoff from several domestic tanks is channeled to a communal tank to be collected, processed, and redistributed to needy domestic tanks. Overflow from the communal tank is used for groundwater recharge. The CDRWH system model aims to increase water supply, reduce runoff, and conserve groundwater. The model simulation uses daily water balance analysis and yield before spillage algorithm. The simulation scenario uses variations in roof area, number of house occupants, storage tank volume, and rainfall categories: 20 years, wet year, normal year, and dry year. Jagakarsa, an urban area in South Jakarta, was selected for the CDRWH system modeling. The results showed that the CDRWH model significantly improved the performance of the volumetric reliability (VR) and time reliability (TR) systems. In addition, the model could show a comparison of total groundwater recharge (GWR) and groundwater extraction (GWE), where the GWR capacity was higher. This allows centralized rainwater management in communal tanks, thereby reducing groundwater usage. The design of this model is simple. Therefore it can be easily duplicated for application in other locations. © 2025 The Authors

关键词： Communal-based domestic rainwater harvesting (CDRWH) Groundwater extraction (GWE) Groundwater recharge (GWR) Jagakarsa-South Jakarta Reduced runoff Water supply

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Creation of a structural engineering professional master's degree program

Creation of a structural engineering professional master's d...

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119th ASEE Annual Conference and Exposition

作者： Gross, Jennifer H. Mohr, Donna M. Pessiki, Stephen Department of Practice Master of Engineering in Structural Engineering Program Lehigh University United States Recruiting and Program Development P.C. Rossin College of Engineering and Applied Science Lehigh University United States Department of Civil and Environmental Engineering Lehigh University United States

ISBN: (纸本)9780878232413

Due to the complexity of contemporary practice, top-tier structural engineering firms hold the master's degree as the minimum level of education for new hires. In addition, the American Society of civil Engineers (ASCE) recommends a master's degree or the equivalent of 30 credits beyond a bachelor's degree as part of the minimum body of knowledge for licensed professional engineers. Finally, students whose end goal is a career in professional practice have indicated a preference for graduate programs focused on design knowledge essential for the advancement of structural engineering practice. These needs provided the opportunity for the creation of a new professional master's program in structural engineering at Lehigh University. Launched in summer 2008, the program is led by a full-time professor of practice with industry design experience and guided by an executive advisory board, composed of representatives from all areas of the building design and construction profession. The hallmark of the 30-credit, 10-month program is a 9-credit, 3-course design project sequence in which student teams design a real-world structure from initial concept to final construction documents. An individual project assignment, as well as technical elective courses, allows students to tailor the program to their unique interests and career goals. A laboratory class provides hands-on learning of structural behavior. Interaction with industry leaders through seminars, field trips, and externships provides students ample opportunity to network with professionals and gain an understanding of their chosen industry. Assessments were conducted to determine the viability of the proposed program with respect to industry and students. engineering firms were surveyed to provide feedback on the proposed program elements as well as to gage the potential job market for graduates. Undergraduate students were surveyed to determine interest in the program and to gather student feedback on key program

关键词： Students

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Improving the Performance of Asphalt Mixtures with Highly Acidic Aggregates in Central Vietnam Using Modifier Based on Styrene-Butadiene-Styrene and Rosin Resin

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Journal of Materials in civil engineering 2025年第7期37卷

作者： Nguyen, Lan Ngoc Lee, Hosin David Bui, Lam Tung Kim, Young-Ik Truong, Van Quyet Nguyen, May Huu Nguyen, Du Van Dept. of Construction Materials Faculty of Construction Engineering Univ. of Transport and Communications No. 03 Cau Giay Hanoi100000 Viet Nam Dept. of Civil and Environmental Engineering Iowa Technology Institute The Univ. of Iowa Iowa CityIA52242 United States Research Dept. Hansoo Natech Co. Ltd. 6-20 Yuseong-daero 1205beon-gil Yuseong-gu Daejeon34104 Korea Republic of Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima Univ. 1-4-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8527 Japan Faculty of Civil Engineering Univ. of Transport and Communications Campus in Ho Chi Minh City Ho Chi Minh City700000 Viet Nam

In Central Vietnam, the aggregate typically originates from highly acidic rocks containing a significant amount of silicon dioxide (SiO2), leading to poor adhesion quality with virgin asphalt binder. Hence, the asphalt mixture production usually needs to utilize adhesion promoters. Based on the chemical compositions of the sample aggregate (up to 72.3% SiO2), research has been conducted to introduce an adhesive agent called rubber modified compound (RMC-160), which is composed of styrene-butadiene-styrene (SBS) with petroleum hydrocarbon resin, treated clay and mineral oil. This article presents the research findings regarding the adhesion effectiveness of RMC-160-modified asphalt binder to high acid-based aggregate through laboratory and field tests, along with the mixture performance under both short-term oven aging (STOA) and long-term oven aging (LTOA). The test results exhibited remarkable effects, whereby the asphalt binder modified with RMC-160 additive significantly increased the adhesion level from Grade 2 to Grade 4, and the asphalt mixtures containing RMC-160 had lower rutting and higher cracking tolerance (CTIndex) under both the STOA and LTOA conditions. © 2025 American Society of civil Engineers.

关键词： Silicon oxides

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A preliminary data fusion study to assess the feasibility of Foundation Process-Property Models in Laser Powder Bed Fusion

arXiv

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arXiv 2025年

作者： Vendrell-Gallart, Oriol Negarandeh, Nima Foumani, Zahra Zanjani Amiri, Mahsa Valdevit, Lorenzo Bostanabad, Ramin Department of Mechanical and Aerospace Engineering University of California IrvineCA92697 United States Materials and Manufacturing Technology Program University of California IrvineCA92697 United States Department of Materials Science and Engineering University of California IrvineCA92697 United States Department of Civil and Environmental Engineering University of California IrvineCA92697 United States

Foundation models are at the forefront of an increasing number of critical applications. In regards to technologies such as additive manufacturing (AM), these models have the potential to dramatically accelerate process optimization and, in turn, design of next generation materials. A major challenge that impedes the construction of foundation process-property models is data scarcity. To understand the impact of this challenge, and since foundation models rely on data fusion, in this work we conduct controlled experiments where we focus on the transferability of information across different material systems and properties. More specifically, we generate experimental datasets from 17-4 PH and 316L stainless steels (SSs) in Laser Powder Bed Fusion (LPBF) where we measure the effect of five process parameters on porosity and hardness. We then leverage Gaussian processes (GPs) for process-property modeling in various configurations to test if knowledge about one material system or property can be leveraged to build more accurate machine learning models for other material systems or properties. Through extensive cross-validation studies and probing the GPs’ interpretable hyperparameters, we study the intricate relation among data size and dimensionality, complexity of the process-property relations, noise, and characteristics of machine learning models. Our findings highlight the need for structured learning approaches that incorporate domain knowledge in building foundation process-property models rather than relying on uninformed data fusion in data-limited applications. © 2025, CC BY.

关键词： Data fusion

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FRACTAL DIMENSIONS AND POROSITIES OF ZOOGLOEA-RAMIGERA AND SACCHAROMYCES-CEREVISAE AGGREGATES

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BIOTECHNOLOGY AND BIOengineering 1991年第4期38卷 389-396页

作者： LOGAN, BE WILKINSON, DB Environmental Engineering Program Department of Civil Engineering and Engineering Mechanics University of Arizona Tucson Arizona 85721 [*]Environmental Engineering Program Department of Civil Engineering and Engineering Mechanics University of Arizona Tucson Arizona 85721

The fractal nature of microbial aggregates is a function of the type of microorganism and mixing conditions used to develop aggregates. We determined fractal dimensions from length-projected area (D2) and length-number scaling (D3) relationships. Aggregates of Zoogloea ramigera developed in rotating test tubes were both surface and mass fractals, with fractal dimensions of D2 = 1.69 +/- 0.11 and D3 = 1.79 +/- 0.28 (+/- standard deviation), respectively. When we grew this bacteria in a bench-top fermentor, aggregates maintained their surface fractal characteristics (D2 = 1.78 +/- 0.11) but lost their mass fractal characteristics (D3 = 2.99 +/- 0.36). Yeast aggregates (Saccharomyces cerevisae) grown in rotating test tubes had higher average fractal dimensions than bacterial aggregates grown under physically identical conditions, and were also considered fractal (D2 = 1.92 +/- 0.08 and D3 = 2.66 +/- 0.34). Aggregate porosity can be expressed in terms of a fractal dimension, but average porosities are higher than expected. The porosities of yeast aggregates (0.9250-0.9966) were similar to porosities of bacterial aggregates (0.9422-0.9980) cultured under the same physical conditions, although bacterial aggregates developed in the reactor had higher average porosities (0.9857-0.9980). These results suggest that scaling relationships based on fractal geometry may be more useful than equations derived from Euclidean geometry for quantifying the effects of different fluid mechanical environments on aggregate morphology and characteristics such as density, porosity, and projected surface area.

关键词： LENGTH-PROJECTED AREA LENGTH-NUMBER SCALING ZOOGLOEA-RAMIGERA SACCHAROMYCES-CEREVISAE FRACTAL GEOMETRY

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Nexus between polymer support and metal oxide nanoparticles in hybrid nanosorbent materials （HNMs） for sorption/desorption of target ligands

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Frontiers of environmental Science & engineering 2015年第5期9卷 929-938页

作者： Ryan C. SMITH Jinze LI Surapol PADUNGTHON Arup K. SENGUPTA Environmental Engineering Program Department of Civil and Environmental Engineering Lehigh University Bethlehem PA 18015 USA

Metal oxide nanoparticles like hydrated ferric oxide （HFO） or hydrated zirconium oxide （HZrO） are excellent sorbents for environmentally significant ligands like phosphate, arsenic, or fluoride, present at trace concentrations. Since the sorption capacity is surface dependent for HFO and HZrO, nanoscale sizes offer significant enhancement in performance. However, due to their miniscule sizes, low attrition resistance, and poor durability they are unable to be used in typical plug-flow column setups. Meanwhile ion exchange resins, which have no specific affinity toward anionic ligands, are durable and chemically stable. By impregnating metal oxide nanoparticles inside a polymer support, with or without functional groups, a hybrid nanosorbent material （HNM） can be prepared. A HNM is durable, mechanically strong, and chemically stable. The functional groups of the polymeric support will affect the overall removal effi- ciency of the ligands exerted by the Donnan Membrane Effect. For example, the removal of arsenic by HFO or the removal of fluoride by HZrO is enhanced by using anion exchange resins. The HNM can be precisely tuned to remove one type of contaminant over another type. Also, the physical morphology of the support material, spherical bead versus ion exchange fiber, has a significant effect on kinetics of sorption and desorption. HNMs also possess dual sorption sites and are capable of removing multiple contaminants, namely, arsenate and perchlorate, concurrently.

关键词： ion exchange sorpfion arsenic perchlorat~,fluoride

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Characterization of halogenated DBPs and identification of new DBPs trihalomethanols in chlorine dioxide treated drinking water with multiple extractions

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Journal of environmental Sciences 2017年第8期58卷 83-92页

作者： Jiarui Han Xiangru Zhang Jiaqi Liu Xiaohu Zhu Tingting Gong Environmental Engineering Program Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology School of the Environment Nanjing University

Chlorine dioxide(ClO2) is a widely used alternative disinfectant due to its high biocidal efficiency and low-level formation of trihalomethanes and haloacetic acids. A major portion of total organic halogen(TOX), a collective parameter for all halogenated DBPs, formed in ClO2-treated drinking water is still unknown. A commonly used pretreatment method for analyzing halogenated DBPs in drinking water is one-time liquid–liquid extraction(LLE), which may lead to a substantial loss of DBPs prior to analysis. In this study, characterization and identification of polar halogenated DBPs in a ClO2-treated drinking water sample were conducted by pretreating the sample with multiple extractions. Compared to one-time LLE, the combined four-time LLEs improved the recovery of TOX by 2.3 times. The developmental toxicity of the drinking water sample pretreated with the combined four-time LLEs was 1.67 times higher than that pretreated with one-time *** the aid of ultra-performance liquid chromatography/electrospray ionization-triple quadrupole mass spectrometry, a new group of polar halogenated DBPs, trihalomethanols,were detected in the drinking water sample pretreated with multiple extractions; two of them,trichloromethanol and bromodichloromethanol, were identified with synthesized standard compounds. Moreover, these trihalomethanols were found to be the transformation products of trihalomethanes formed during ClO2disinfection. The results indicate that multiple LLEs can significantly improve extraction efficiencies of polar halogenated DBPs and is a better pretreatment method for characterizing and identifying new polar halogenated DBPs in drinking water.

关键词： Disinfection byproducts DBPs Chlorine dioxide treatment Multiple extractions Toxicity

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INCREASED MASS-TRANSFER TO MICROORGANISMS WITH FLUID MOTION

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BIOTECHNOLOGY AND BIOengineering 1990年第11期35卷 1135-1144页

作者： LOGAN, BE DETTMER, JW Environmental Engineering Program Department of Civil Engineering University of Arizona Tucson Arizona 85721

The effect of fluid flow and laminar shear on bacterial uptake was examined under conditions representative of the fluid environment of unattached and attached cells in wastewater treatment bioreactors. Laminar shear rates below 50 s-1 did not increase leucine uptake by suspended cultures of Zoogloea ramigera. However, leucine uptake by cells fixed in a flow field of .apprx. 1 mm s-1 was 55-65% greater than uptake by suspended cells. Enhanced microbial uptake with advective motion is consistent with mass transfer rates calculated using Sherwood number corrrelations. Advective flows increases microbial uptake by increasing collisions between substrate molecules and cells through compression of the concentration boundary layer surrounding a cell. The rate of leucine uptake suggests that binding proteins used to transport leucine into the cell can occupy approximately 1% of the cell surface area.

关键词： Microorganisms

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