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Case Studies in Chemical and environmental engineering 2025年 11卷

作者： Nurherdiana, Silvana Dwi Rahimah, Alya Dirja, Ramadhanu Tungga Dewi, Kun Prasasti Ramadhani, Mohamad Rizki Nugraha, Reva Edra Fitriana Wafi, Abdul Master of Environmental Science Study Program Faculty of Engineering and Science Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No. 1 Gn. Anyar Kec. Gunung Anyar East Java Surabaya 60294 Indonesia Study Program of Chemical Engineering Faculty of Engineering and Science Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No. 1 Gn. Anyar Kec. Gunung Anyar East Java Surabaya 60294 Indonesia Low Carbon Technology Research Centre Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No.1 Gn. Anyar Kec. Gunung Anyar East Java Surabaya 60294 Indonesia Department of Physics Universitas Negeri Surabaya East Java Surabaya 60231 Indonesia Research Center for Food Technology and Processing National Research and Innovation Agency (BRIN) Gading Playen Gunungkidul Yogyakarta 55861 Indonesia

This study presents an investigation of chemical and physical characterization, green process analysis, techno-economic considerations, and carbon emissions for synthesizing metal-organic frameworks (MOFs) from plastic and can waste using microwave-assisted synthesis. The microwave-assisted synthesis proves to be more cost-effective, with a reduction in CO₂ emissions by up to 80%. The synthesized material (MIL-Mw-U) demonstrates excellent performance in methylene blue (MB) removal, achieving 98.41% removal, with 97.87% removal although the catalyst is used in the third cycle. The adsorption of methylene blue (MB) onto MIL-Mw-U achieved a maximum capacity of 295.26 mgg⁻¹ at pH 3 and decreased to 258.68 mgg⁻¹ at pH 11 due to OH⁻ competition. The Langmuir isotherm (R² = 0.9381) and pseudo-second-order kinetics (R² = 0.999) confirmed monolayer chemisorption as the dominant mechanism. This innovative approach supports circular economy principles by converting can and plastic bottle waste into functional material for dye removal, offering sustainable solutions for environmental challenges. © 2025 The Authors

关键词： Adsorption Dye removal Green chemistry Metal organic frameworks Photocatalytic SDGs 13 Climate Change

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APPLICATION OF MATERIAL BALANCE CONCEPT IN WASTE MINIMIZATION ASSESSMENT OF A METAL-FINISHING PROCESS

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environmental PROGRESS 1994年第3期13卷 202-207页

作者： SMITH, EH SCHURIG, AC Environmental Engineering Program School of Engineering and Applied Science Southern Methodist University Dallas Texas 75275-0335 Corporate Environmental Texas Instruments Incorporated N. Central Expressway M/S 56 Dallas Texas 75243

Microscale application of the material balance concept on a chrome-bearing metal finishing rinse tank was demonstrated to be a useful tool for evaluating waste minimization alternatives for plating rinses. Although more focused, the approach is easy to implement and once calibrated, the material balance model can predict process sensitivity for variables that are relevant to achieving waste minimization goals. In this case, substantial savings can be achieved in water usage and sludge generation by reducing flow-through rinse rates and installing mist spray rinses above concentrated finishing tanks.

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Advances in the characterization of the polarity of DOM under ambient water quality conditions using the polarity rapid assessment method

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Water science and Technology: Water Supply 2008年第6期8卷 725-733页

作者： Philibert, Marc Bush, Steve Rosario-Ortiz, Fernando L. Suffet, I.H. Environmental Science and Engineering Program UCLA School of Public Health Box 95-1772 Los Angeles CA 90095 United States Department of Civil Environmental and Architectural Engineering University of Colorado Boulder CO 80309 United States

Dissolved organic matter (DOM) is a mixture of compounds that are found ubiquitously in natural waters. The characterization of DOM is important in order to understand its effect on environmental processes and during treatment systems. Of all the properties usually measured with relation to DOM, the polarity is of critical importance since it will directly influence different processes. Recently, a new method has been developed for the characterization of DOM under ambient conditions, called the Polar Rapid assessment Method (PRAM). The PRAM allows characterization and temporal and spatial comparisons under environmentally relevant conditions of pH and ionic strength. This study first modifies the PRAM method to 3 probes for high sample throughput by using a subset of the SPE sorbents to interpret DOM polarity by DOC and UV detection. Then the modified PRAM is compared to the XAD resin polarity method and finds a similarity in hydrophobic assessment but different results for the hydrophilic DOM. This study then evaluates the use of PRAM as a tool to evaluate water treatment processes and the character of size fractions of DOM. The PRAM is shown to be a very useful tool to evaluate and thus optimize treatment efficiency and removal of DOM. © IWA Publishing 2008.

关键词： Ionic strength

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Effects of ambient silicic acid concentration on the physiology of marine cyanobacterial Synechococcus

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Marine environmental Research 2025年 209卷 107220页

作者： Ou, Qiang Xu, Huo Zhang, Zhen Ma, Jie Pan, Ke Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced Study Shenzhen University Shenzhen China SZU-HKUST Joint PhD Program in Marine Environmental Science Shenzhen University Shenzhen China Department of Ocean Science The Hong Kong University of Science and Technology Hong Kong

The marine cyanobacterium Synechococcus can accumulate significant amounts of silicon (Si) within its cells, potentially contributing to the vertical transport of biogenic Si in the ocean. This has prompted interest in understanding the uptake, subcellular distribution, and chemical forms of Si in Synechococcus. The surprisingly high intracellular Si concentration could have important impacts on Synechococcus physiology, but these effects have been relatively unexplored. In this study, we investigated the effects of external Si concentrations, [Si(OH)4], on the cell physiology of two strains of Synechococcus (CC9311 and WH7803). Increased ambient [Si(OH)4] significantly enhanced total cellular and water-soluble Si content in Synechococcus, but had little effect on their growth. However, the cell size, volume and photosynthetic performance were significantly reduced in strain WH7803, indicating some harmful effects in the cell. Increases in ambient [Si(OH)4] also altered the Derjaguin-Muller-Toporov (DMT) modulus, adhesion, surface potential and elemental composition of the Synechococcus cells. Notably, significant changes in area-specific adsorbed metals and volume-specific metal content were observed at higher [Si(OH)4] levels, suggesting Si availability in seawater could markedly impact the interactions between Synechococcus cell and environment. Overall, this study provides new insights into the physiological adaptations of marine cyanobacterium Synechococcus to varying environmental silicic acid concentrations. © 2025 Elsevier Ltd

关键词： Psychophysiology

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EXPERIMENTAL AND MODELED RESULTS DESCRIBING THE ADSORPTION OF ACETONE AND BENZENE ONTO ACTIVATED CARBON-FIBERS

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environmental PROGRESS 1994年第1期13卷 26-30页

作者： CAL, MP LARSON, SM ROOD, MJ University of Illinois at Urbana-Champaign Environmental Engineering and Science Program Department of Civil Engineering 3230 Newmark Civil Engineering Lab 205 North Mathews Avenue Urbana IL 61801

Activated carbon fibers (ACF) were used to adsorb ppmv concentrations of volatile organic compounds (VOCs) from laboratory generated gas streams. VOCs considered were benzene and acetone because the VOC are commonly found in indoor air and have potential to increase health risks to humans. ACF were used as the adsorbent because they typically exhibit higher adsorption capacities and faster adsorption kinetics than commercially available granular activated carbons (GAC) and show potential as an adsorbent to effectively remove VOCs from indoor air. Adsorption models by Dubinin and coworkers (Dubinin, 1975), based on the theory of volume filling of micropores, and an empirical model by Freundlich were used to fit the measured adsorption isotherms. Agreement between the modeled and experimental results for acetone and benzene using the Dubinin-Radushkevich equation generally improved with increasing BET surface area and produced reasonable fits of the adsorption isotherms for both acetone and benzene. The Freundlich equation produced values for correlation coefficients (R) between modeled and experimental data from 0.980 to 0.997, indicating the validity of using the Freundlich equation to model the adsorption isotherms over the concentration range of interest. These results indicate that ACF show potential as an adsorbent for removing low concentrations of VOCs from indoor air.

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Seagrass Meadows under the Changing Climate:A Review of the Impacts of Climate Stressors

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Research in Ecology 2022年第1期4卷 27-36页

作者： Kuok Ho Daniel Tang Tony Hadibarata Environmental Science Program Division of Science and TechnologyBeijing Normal University-Hong Kong Baptist University United International CollegeZhuhaiGuangdong519087China Environmental Engineering Program Faculty of Engineering and ScienceCurtin University MalaysiaCDT 250MiriSarawak98009Malaysia

Seagrass meadows provide important ecological functions,particularly by serving as carbon sinks and breeding grounds for marine *** change has threatened seagrass communities,causing their replacement,loss and increased *** review examined scholarly articles published between 2010-2021 to comprehensively present the impacts of climate change on seagrass *** shows that ocean warming negatively affects seagrass communities by favouring communities of lower structuring capacities,thus reducing the effectiveness of their ecological *** warming also promotes the propagation and spread of invasive species,and changes the trophic structures leading to further loss of seagrasses of *** seawater temperature is associated with shoot mortality and retarded growth of certain *** level rise causes more wave energy to be received by coastal seagrass communities,thus,creating more damage to the *** sea limits light penetration and alters distribution of seagrass *** dioxide enrichment of seawater increases photosynthetic rate of seagrasses but ocean warming and acidification counteract this beneficial *** dioxide enrichment affects different seagrass species and different parts of a seagrass species differently,and,where beneficial to seagrass communities,could enhance their ecological *** extremes could kill seagrasses while marine heatwaves and flooding could act synergistically to increase carbon demand of certain seagrasses and unfavourably change their *** impacts are often aggravated by anthropogenic *** review calls for more studies and conservation efforts to understand the impacts of climate change on seagrass communities and future-proof them against the changing climate.

关键词： Climate change Extreme weather Seagrass Ocean warming Ocean acidification Vulnerability

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Effects of non-submerged boulder on flow characteristics——A field investigation

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International Journal of Sediment Research 2019年第2期34卷 136-143页

作者： Hossein Afzalimehr Mohammad Reza Maddahi Danial Naziri Jueyi Sui Department of Civil Engineering Iran University of Science and Technology Department of Water Engineering Shahid Bahonar University of Kerman Department of Water Engineering Isfahan University of Technology Environmental Engineering Program University of Northern British Colombia

The effect of fully submerged boulders on the flow structure in channels has been studied by some ***,many natural streams have bed material with boulders that are not fully submerged under *** many natural streams,boulders cover between 1% and 10% of the area of the stream *** effect of non-submerged boulders on the velocity profile and flow characteristics is very important for assessing riverbed *** objectives of this paper are to find the pattern of velocity distribution around a non-submerged boulder and to compare it with the classical studies on flow resistance and Reynolds stress distribution in open ***,by considering the variation in the Reynolds stress distribution at different locations around a non-submerged boulder,the effect of a non-submerged boulder on the estimation of shear velocity and resistance to flow has been *** indicates that inside the scour hole caused by a non-submerged boulder in a river velocity distributions are ***,velocity distributions are regular outside the scour *** presence of the boulder causes a considerable deviation of the Reynolds shear stress from the classic distribution,showing a non-specific distribution with negative *** classical methods for calculating shear velocity are not suitable because these methods do not give detailed velocity and Reynolds stress distributions in natural rivers with a lot of ***,the effect of a non-submerged boulder on the estimation of the resistance to flow by considering the variations in velocity and Reynolds stress distributions at different locations around a non-submerged boulder is important and needs to be studied in a natural river instead ofjust in laboratory *** negative values in Reynolds stress distribution around a boulder indicate that the classical methods are unable to predict resistance to flow,and also show strong turbulence inside the scour hole where the complex

关键词： Irregular velocity distribution Logarithmic law Non-submerged boulder Negative Reynolds stress Resistance to flow

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TIDES IN THE ENGLISH-CHANNEL AND SOUTHERN NORTH-SEA - A FREQUENCY-DOMAIN ANALYSIS USING MODEL TEA-NL

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ADVANCES IN WATER RESOURCES 1989年第4期12卷 166-183页

作者： BAPTISTA, AM WESTERINK, JJ TURNER, PJ Department of Environmental Science and Engineering Oregon Graduate Center 19600 NW Von Neumann Drive Beaverton OR 97006 USA Ocean Engineering Program Civil Engineering Department Texas A & M University College Station TX 77843 USA

The frequency-time finite element model TEA-NL is used to investigate tidal propagation and circulation in the English Channel and the southern North Sea, in the context of the Tidal Flow Forum benchmark. Quality of TEA-NL simulations, relative to both field data and simulations by other numerical models is discussed. Sensitivity analyses are performed with regard to the effect on accuracy of bottom friction, and the effect on computational cost of the strategy used to harmonically decompose and iterate non-linear loading terms in the shallow water equations.

关键词： Tides

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Corrigendum to "GenX is not always a better fluorinated organic compound than PFOA: A critical review on aqueous phase treatability by adsorption and its associated cost" [Water Research 205 (2021) 117683]

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Water research 2025年第PT B期268卷 122786页

作者： Hamed Heidari Tauqeer Abbas Yong Sik Ok Daniel C W Tsang Amit Bhatnagar Eakalak Khan Civil and Environmental Engineering and Construction Department University of Nevada Las Vegas NV United States. Korea Biochar Research Center APRU Sustainable Waste Management Program & Division of Environmental Science and Ecological Engineering Korea University Seoul Republic of Korea. Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China. Department of Separation Science LUT School of Engineering Science LUT University Sammonkatu 12 FI-50130 Mikkeli Finland. Civil and Environmental Engineering and Construction Department University of Nevada Las Vegas NV United States. Electronic address: eakalak.khan@unlv.edu.

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Evolution and customisation of the RegCM model for urban climate studies:Addressing multifaceted challenges and advancing climate science

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Geography and Sustainability 2024年第4期5卷 607-624页

作者： Naushin Yasmin Safi Ullah Sami G.Al-Ghamdi Biological and Environmental Science and Engineering(BESE)Division Environmental Science and Engineering ProgramKing Abdullah University of Science and Technology(KAUST)23955-6900ThuwalSaudi Arabia KAUST Climate and Livability Initiative King Abdullah University of Science and Technology(KAUST)23955-6900ThuwalSaudi Arabia

The Regional Climate Model(RegCM)proves valuable for climate analysis and has been applied to a wide range of climate change aspects and other environmental issues at a regional *** model also demonstrated success in diverse areas of urban research,including urban heat island studies,extreme climate events analysis,assessing urban resilience,and evaluating urbanization impacts on climate and air ***,more studies have been conducted in utilizing RegCM to address climate change in cities,due to its enhanced ability over the years to capture meteorological phenomena at city ***,there are many challenges associated with its implementation in meso-scale research,which are attributed to various shortcomings and thus create room for further improvement in the *** paper presents a comprehensive overview of the evolution of the RegCM over the years and its customisation across various parameters,demonstrating its versatility in urban climate studies and underscoring the model’s pivotal role in addressing multifaceted challenges in urban *** addressing these aspects,the paper offers valuable insights and recommendations for researchers seeking to enhance the accuracy and efficacy of urban climate simulations using the RegCM system,thereby contributing to the advancement of urban climate science and sustainability.

关键词： RegCM Urban climate Air quality Urban heat island effect Urban design Climate extremes

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