Article
Chemistry, Analytical
Xinpeng Ren, Michael C. Breadmore, Fernando Maya
Summary: This study reports a method for capturing microplastics and separating organic pollutants in a biphasic medium using a magnetic field, providing convenience for the analysis of multiple organic pollutants in solid mixtures.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Lin Liu, Lixin Zhao, Yian Sun, Sheng Gao, Minzheng Jiang, Minghu Jiang, Diego Rosso
Summary: The study examined the impact of the inlet section of hydrocyclones on separation efficiency and designed a novel hydrocyclone suitable for medium rearrangement. Simulations were used to compare the effects of different separating blocks on separation efficiency, with results indicating that SCB displayed excellent rearrangement effect and low pressure drop. Additionally, experimental data comparing CH and HMRI showed that HMRI achieved 6.4-8.0% higher separation efficiency than CH.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Meteorology & Atmospheric Sciences
Bosong Zhang, Brian J. Soden, Gabriel A. Vecchi, Wenchang Yang
Summary: By suppressing radiative interactions, the global frequency of TCs is significantly reduced, particularly the frequency of pre-TC synoptic disturbances. In a warmer climate, the magnitude of TC reduction from suppressing radiative interactions is diminished due to the larger contribution from latent heat release.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Karthik Balaguru, Gregory R. Foltz, L. Ruby Leung, Samson M. Hagos
Summary: Tropical cyclones are often accompanied by strong winds and torrential rains. The competition between the stabilizing effect of rainfall and wind-induced mixing, as well as the degree to which it modulates TC-induced sea surface cooling, remain unknown. This study shows that heavy rains under weak TCs can significantly reduce the magnitude of cold wakes induced by them, with the ocean surface freshening and cooling less.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Applied
Minhang Song, Lixin Zhao, Lin Liu, Baorui Xu, Shuang Zhang, Zhongrun Lu
Summary: This study classifies three-phase hydrocyclones (3PH) and analyzes their structural features, design points, and processing difficulties to provide guidance for the design of 3PH structure. Technical and economic analyses are conducted based on operating parameters, separation performance, and pressure loss. The current problems and future development directions are summarized. Considering the comprehensive performance of different 3PHs, the 3PH with a single three-phase cyclone chamber is recommended in practical applications.
SEPARATION AND PURIFICATION REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Satyanand Pandey, Indrashis Saha, Om Prakash, Tathagata Mukherjee, Jawed Iqbal, Amit Kumar Roy, Marek Wasilewski, Lakhbir Singh Brar
Summary: This study examines the impact of different shapes and height variants of cyclone separators on performance, proposing non-standard solutions and finding variations in pressure loss and separation efficiency among different designs.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
C. J. Weber, C. Opp, J. A. Prume, M. Koch, T. J. Andersen, P. Chifflard
Summary: The contamination of oceans, freshwaters, and soils by microplastics has become a major challenge in the Anthropocene. This study investigates the spatial distribution of microplastic particles in floodplain soils and advances our understanding of their deposition and relocation at the aquatic-terrestrial interface.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Meteorology & Atmospheric Sciences
Tsung-lin Hsieh, Bosong Zhang, Wenchang Yang, Gabriel A. Vecchi, Ming Zhao, Brian J. Soden, Chenggong Wang
Summary: The response of tropical cyclone frequency to sea surface warming is uncertain in climate models. The anomalies of large-scale atmospheric radiation in response to climate change are hypothesized to be a source of this uncertainty, and their influence on TC frequency is investigated. By exchanging atmospheric radiation anomalies between two atmospheric models with opposite TC frequency responses to uniform sea surface warming, the largest model discrepancy occurs in the western North Pacific. The discrepancy is caused by prescribed positive radiation anomalies leading to anomalous large-scale ascent and an increase in TC frequency, while prescribed negative radiation anomalies lead to anomalous large-scale descent and a decrease in TC frequency. The model spread in TC frequency response is approximated by the model spread in the frequency response of pre-TC vortices, which is explained by changes in the large-scale circulation using a downscaling formula known as the seed propensity index. The index is further generalized to predict the influence of large-scale radiation anomalies on TC seed frequency. The results show that model spread in TC and seed frequency response can be reduced when constraining the large-scale radiation anomalies.
JOURNAL OF CLIMATE
(2023)
Article
Engineering, Chemical
Li Ji, Liqun He, Kaiwei Chu, Shibo Kuang
Summary: This paper presents a numerical study on the behavior of cut-size-near particles in hydrocyclones and their impacts on cyclone performance. The results show that a larger particle distribution spread value decreases water split and separation precision, while increasing the cut size and pressure drop. The effects of a larger spread value are more apparent in larger hydrocyclones, potentially causing a plateau in partition curves.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Shuangcheng Fu, Yuchen Qian, Huixin Yuan, Yong Fang
Summary: This paper investigates the influence of cone angles on the separation of light dispersed plastics (PET) and heavy dispersed plastics (PVC) in a hydrocyclone. The results show that different cone angles have different effects on the separation performance, with the Newton efficiency reaching its peak at an optimum cone angle.
Article
Meteorology & Atmospheric Sciences
Minhee Chang, Doo-Sun R. Park, Chang-Hoi Ho
Summary: An abrupt decrease in annual tropical cyclone genesis frequency (TCGF) has been noticed over the western North Pacific Ocean, with the decrease in October to December (OND) accounting for 79% of the total decrease after 1998. Different interdecadal changes in TCGF between October to December and January to September are attributed to variations in equatorial easterly wind anomalies and large-scale anticyclone anomalies in the subtropics. The extension of easterly wind anomalies under similar La Nina-like SST warming pattern is responsible for the seasonal inhomogeneity of interdecadal changes in TCGF.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Ting-Chen Chen, Alejandro Di Luca, Katja Winger, Rene Laprise, Julie M. Theriault
Summary: This study examines the seasonality of near-surface wind speeds associated with extratropical cyclones (ETCs) in northeastern North America. Contrary to previous studies, the results show that ETCs during the fall season have stronger winds due to stronger continental cyclones and weaker low-level stability. Additionally, ETCs are found to favor inland lakes and Hudson Bay during the low-ice-content fall season, resulting in lower surface roughness. The study also presents a simple linear regression formula to predict 10-m wind speed, which can be used for cyclone near-surface wind risk assessment.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Jing -yi Zhuo, Zhe-min Tan
Summary: This study uses deep learning algorithms to estimate the size of tropical cyclones in the western North Pacific based on satellite data. The algorithms were used to reconstruct a historical dataset, revealing significant expanding trends in the outer circulations of these cyclones and a weak contracting trend in the inner-core size.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
John Ashcroft, Juliane Schwendike, Stephen D. Griffiths, Andrew N. Ross, Chris J. Short
Summary: Despite similarities in the track and intensity, the predictabilities of the tropical cyclones Haiyan and Hagupit differed greatly, with Hagupit showing larger uncertainty. Accurately representing the track and position of Hagupit is vital for an accurate forecast.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2021)
Article
Engineering, Chemical
Duanxu Hou, Peikun Liu, Qiang Zhao, Lanyue Jiang, Baoyu Cui, Dezhou Wei
Summary: This study investigates the effect of separation space on the flow field and separation performance of cylindrical hydrocyclones using a TFM model. The results show that separation space has a slight effect on the tangential and axial velocities of particles. A larger separation space increases the upward distance of particles with the swirling flow, leading to an increased probability of forming particle circulation flow. Increasing separation space improves separation accuracy and reduces cut size, but the separation effect deteriorates when the vortex finder depth is smaller than the inlet pipe height.
Article
Engineering, Environmental
M. R. Gent, M. Menendez, H. Muniz, S. Torno
Article
Engineering, Chemical
Mario Menendez, Malcolm Gent, Susana Torno, Nerea Crespo
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2017)
Article
Engineering, Chemical
Mario Menendez, Hector Muiliz Sierra, Malcolm Gent, Francisco Javier de Cos Juez
MINERALS ENGINEERING
(2018)
Article
Engineering, Environmental
Malcolm Gent, Hector Muniz Sierra, Mario Menendez, Francisco Javier de Cos Juez
Article
Environmental Sciences
Hector Muniz Sierra, Mercedes Diaz-Somoano, Michal Syc, Anastasia Shtukaturova, Jose Manuel Gonzalez La Fuente, Patricia Diaz Baizan, Laura Megido
Summary: Proper management of municipal solid waste is crucial for environmental protection and material recovery in a circular economy. The Principality of Asturias and the Region of Prague have developed comprehensive waste management systems to achieve recycling targets set by European policies. This research compares waste generation and management policies in both regions and analyzes the influence of various factors such as waste collection, population density, municipality type, and waste disposal facilities. The presence of civic amenity sites and bulky facilities reduces the volume of mixed municipal waste and improves recycling rates. Contrary to popular belief, the utilization of MSW incineration systems and ash management improves recycling rates, as seen in Prague.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2023)
Article
Chemistry, Physical
Mario Menendez Alvarez, Hector Muniz Sierra, Fernando Sanchez Lasheras, Francisco Javier de Cos Juez
Article
Engineering, Environmental
Xiaojian Liu, Bei Wang, Yayun Ma, Xiangyang Zhou, Juan Yang, Yuehui He, Jingjing Tang, Fanyun Su, Wan Yang
Summary: This study proposes a combined process of reduction roasting of herb-medicine residue and oxalic acid leaching to improve the recovery efficiency of lithium from spent lithium-ion batteries. By utilizing the reducing gas produced from the pyrolysis of herb-medicine residue, the layered structure of the cathode powder is destroyed and converted into Li2CO3, Ni, Co, and MnO. Additionally, selective extraction of lithium is achieved using oxalic acid, and the efficiency and kinetics of lithium extraction are improved under the combined action of herb-medicine residue and oxalic acid.
Article
Engineering, Environmental
Muxina Konarova, Nuno Batalha, Gabriel Fraga, Mohamed H. M. Ahmed, Steven Pratt, Bronwyn Laycock
Summary: This study presents a proof of concept for a technology that integrates PET recovery from mixed plastic waste and plastic pyrolysis. By depolymerizing PET into TPA using a low volatility oil as medium, it achieves low-pressure operation and a selective separation and recovery of TPA from the product mix. Full PET conversion and high TPA recovery were achieved, making it an effective solution for processing mixed waste streams and improving the yield and quality of liquid product from thermal pyrolysis compared to untreated feedstock.
Article
Engineering, Environmental
Zhenhua Sun, Jing Li, Xuejiang Wang, Siqing Xia, Jianfu Zhao
Summary: This study investigated the influence of in-situ formed MgFe2O4 on the hydrothermal treatment of swine manure. The results showed that the in-situ formation of MgFe2O4 improved the dehydration and decarboxylation of organic components in swine manure, thereby improving its carbonization degree. Furthermore, it enhanced the stabilization of heavy metals and the retention of phosphorus. MgFe2O4 modified hydrochars exhibited remarkable adsorption capacity for Pb(II) and Cu(II) without any leaching of heavy metals.
Article
Engineering, Environmental
Yijing Jiang, Boyang Leng, Jingxin Xi
Summary: The increased generation of municipal solid waste has had a significant impact on the economy, environment, and public health. The current waste treatment process has limitations. By developing a comprehensive social costing model, this study assesses the impacts of municipal solid waste management throughout its life cycle and provides policymakers with best practices and feasibility information.
Article
Engineering, Environmental
Marina Hernandes de Paula e Silva, Ricardo Coser Mergulha, Jose Geraldo Vidal Vieira, Andrea Brasco Pampanelli, Rodrigo Salvador, Diogo Aparecido Lopes Silva
Summary: This study developed and implemented a self-assessment tool to assist companies in decision-making processes for establishing circular flows based on Lean Manufacturing and Circular Economy principles. The tool utilized a maturity model and was applied to nine companies of varying characteristics. The findings revealed that certain companies showed higher maturity in water-waste and chemical-emissions management, with larger enterprises focusing on these strategies. However, many companies lacked sufficient training and employee awareness prior to seeking cleaner alternatives, and comprehensive actions to manage the product lifecycle were lacking. To address these gaps, the tool provided tailored recommendations for each company to improve their processes, products, and value chain.
Article
Engineering, Environmental
Gamze Dogdu, Turgay Pekdemir, Sanaz Lakestani, Seyda Karabork, Osman Cavus
Summary: This paper presents data on food waste associated with mini size food packaging services, highlighting the difficulties in emptying the food and consumer wastefulness as the main causes. These findings have significant implications for the sustainability of food and relevant packaging.
Article
Engineering, Environmental
Qingxia Li, Xin Kong, Yuxin Chen, Jianan Niu, Jia Jing, Jin Yuan, Yifeng Zhang
Summary: This study investigates how to enhance methane production from food waste after hydrothermal pretreatment. The results demonstrate a significant increase in methane yield when zero-valent iron and magnetite are used together, and high organic loading is favorable for methane production. Microbial diversity analysis further reveals the dominant pathways and metabolic processes involved in methane generation.
Article
Engineering, Environmental
D. H. H. Sim, I. A. W. Tan, L. L. P. Lim, E. T. Lau, B. H. Hameed
Summary: The development of controlled-release fertilizer formulation is important for preventing environmental pollution caused by nutrient leaching and volatilization. This study combined biochar-based fertilizer with encapsulation technology to improve the nutrient release mechanism. Optimal conditions for synthesizing urea-impregnated biochar (UIB) were determined using central composite design, and the release of nitrogen was described by mathematical models. Results showed that encapsulated UIB (EUIB) achieved complete release of nitrogen in water and exhibited improved water retention in sandy-textural soil. Therefore, EUIB derived from peppercorn waste has the potential to be used as a sustainable controlled-release fertilizer for agriculture.
Article
Engineering, Environmental
Yuchuan Wang, Neslihan Akdeniz
Summary: Incorporating biochar into composting systems can increase compost temperatures. This study developed a heat transfer model for a biochar-amended co-composting system and found that biochar increased thermal conductive losses but also enhanced microbial activity, resulting in an overall increase in total heat unit. When biochar was applied on the surface, it mainly functioned as an insulator.
Article
Engineering, Environmental
George Tsalis, Birger Boutrup Jensen, Jessica Aschemann-Witzel
Summary: This paper empirically explores the relationship between retail price promotions and household food waste. The results show that households with a higher proportion of discount food purchases and environmental awareness tend to waste less food, while larger households and those lacking food handling skills tend to waste more food.
Article
Engineering, Environmental
Lukas Friederici, Arne Koch, Patrick Martens, Jana Pantzke, Sebastiano Di Bucchianico, Thorsten Streibel, Christopher P. Rueger, Ralf Zimmermann
Summary: The increasing demand for lightweight materials has led to a rise in fiber-reinforced plastic (FRP) production. However, the properties and compositional range of FRPs pose challenges to recycling strategies. Pyrolysis has emerged as a promising method for separating the fibers from the polymer matrix. This study investigated the pyrolysis process using thermal analysis and high-resolution mass spectrometry, and also assessed the toxicity of the recovered fibers using an in vitro model.
Review
Engineering, Environmental
Devika Kannan, Shakiba Khademolqorani, Nassibeh Janatyan, Somaieh Alavi
Summary: This paper introduces Smart Waste Management (SWM) that applies Industry 4.0 technologies in waste management. A framework called SWM4.0 is developed, which highlights the importance of smart people, smart cities, smart enterprises, and smart factories in achieving successful waste management. The paper also suggests future research directions and managerial implications.