Pollution caused by ship emissions will considerably impact coastal areas. A test system that matched the actual conditions of a ship was designed based on a portable emission measurement system (PEMS), and the emission characteristic of gaseous and particle emissions and the particle size distribution of the ship's main engine were investigated under real-world operating conditions. The results showed that the emission concentrations of the main pollutants fluctuated greatly under the departure, anchoring, and docking conditions, and the peaks of CO, CO, and NO emissions appeared under these transient conditions. The emission concentrations of CO, hydrocarbons, particle number (PN), and particulate mass increased with the increase in speed. The PN-based particle size distribution of the engine presented a unimodal distribution under daily operating conditions. The maximum emission factor of NO based on the engine power was 29.53 g/kWh at the engine speed of 66 r/min. The results of the study may contribute to supplementing the emission factors of this type of ship, and provide data support for monitoring and assessment of the marine environment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2024.174991 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mechanical characteristics of roll crushing of ore materials based on discrete element method.
Sci Rep
January 2025
School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang, 471003, China.
The application of high-pressure grinding rolls (HPGR) for ore crushing is considered to be one of the effective ways to save energy and reduce emissions in the ore processing industry. The crushing effect is directly determined by the forces of ore material during roll crushing. However, the mechanical state of ore material in roll crushing and the effect of roll structure, process parameters, feed particle size, on the force during the crushing of ore material needs to be expanded.
View Article and Find Full Text PDFPreparation of Ag-Metal organic frameworks-loaded Sodium Alginate Hydrogel for the treatment of periodontitis.
Sci Rep
January 2025
PKUCare Lu'an Hospital, 046204, Shanxi, China.
Periodontitis, a common chronic inflammatory condition caused by bacteria, leads to loss of attachment, resorption of alveolar bone, and ultimately tooth loss. Therefore, reducing bacterial load and fostering alveolar bone regeneration are essential components in the treatment of periodontitis. In this study, we prepared smaller-sized Ag-Metal Organic Frameworks (Ag@MOF) and loaded with sodium alginate (Alg) hydrogel for periodontitis treatment.
View Article and Find Full Text PDFExtraction of cellulose nanocrystals from date seeds using transition metal complex-assisted hydrochloric acid hydrolysis.
Int J Biol Macromol
January 2025
Chemical and Petroleum Engineering Department, College of Engineering, United Arab Emirates University, PO Box 15551, Al Ain, United Arab Emirates. Electronic address:
In this study, the role of a transition metal complex in improving hydrolysis efficiency during nanocellulose production was analysed. Cellulose nanocrystals (CNCs) were extracted from date seeds by incorporating a copper metal complex during HCl hydrolysis. In contrast to traditional HCl hydrolysis at moderate conditions, which yielded only microcrystalline cellulose (MCC), this approach resulted in the extraction of CNCs with a 10 % improved yield compared to MCC.
View Article and Find Full Text PDFSynthesis of BODIPYs using organoindium reagents and survey of their cytotoxicity and cell uptake on nervous system cells.
Bioorg Chem
December 2024
Universidade da Coruña, CICA - Centro Interdisciplinar de Química e Bioloxía and Departamento de Química, Facultad de Ciencias, Campus A Zapateira, 15071 A Coruña, Spain. Electronic address:
In this study, a series of BODIPY dyes were synthesized, containing various substituents at meso position. Further functionalization of the BODIPY framework at C2 and C2-C6 position(s) by palladium-catalysed cross-coupling reactions using organoindium reagents (RIn) was efficiently assessed, starting from C2(6)-halogenated BODIPYs, and their optical properties were measured. The cytotoxicity of BODIPY dyes on SH-SY5Y neuronal cells by MTT assay showed that those compounds bearing thien-2-yl and benzonitrile moieties at meso position, exhibited great efficiency in maintaining cell viability under all tested conditions (up to 50 µM for 24 h and 48 h).
View Article and Find Full Text PDFSustainable microwave-based eutectic mixture assisted purification of low-methoxy pectin and its role as an edible emulsifier in carrot jam preparation.
Food Chem
December 2024
Green Separation Engineering Laboratory, School of Chemical & Biotechnology, SASTRA Deemed to be University, Thanjavur, India. Electronic address:
An optimized microwave-assisted low methoxyl pectin extraction procedure was described. Six task specific deep eutectic solvents (TDES) were used in the extraction of pectin from bilimbi (LMABP) and pomelo peels (LMCGP). Response surface methodology-based optimization of the parameters like feed-to-solvent ratio, extraction time, and microwave power level results in 72.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!