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Exploring new approach for resource utilization of crab shell waste: Optimized microwave torrefaction parameters and efficient self-desulfurization.
J Environ Manage
January 2025
State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission, School of Energy and Environment, Southeast University, Nanjing, 210096, China; Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing, 210036, China.
Finding alternative energy sources and reducing the impact of waste on the environment are pressing global challenges. Crab shells possess the dual characteristics of a pollutant and a resource; therefore, transforming them into clean energy is an urgent issue that needs to be addressed for reducing environmental pollution. This study uses microwave torrefaction to treat crab shell waste efficiently and optimizes the torrefaction conditions through response surface methodology to rapid prepare derived fuel.
View Article and Find Full Text PDFIsotopic spike Os as internal standard and empirical coefficient LA-ICP-MS combined with Sb fire assay for the determination of ultra-trace platinum group elements in geochemical samples.
Talanta
January 2025
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou, 450006, PR China; China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou, 450006, PR China; Key Laboratory for Polymetallic Ores Evaluation and Utilization, MNR, Zhengzhou, 450006, PR China.
In this work, a novel method of antimony fire assay (Sb-FA) enrichment combined with laser ablation ICP-MS (LA-ICP-MS) for the determination of ultra-trace platinum group elements (PGEs) in geological samples was established. The purification and recycling technology of ultra-clean and high-purity fire assay collector SbO was proposed, in addition, high-purity quartz crucible was developed to replace the usual clay crucible, then the blank values of PGEs were as low as 0.0007-0.
View Article and Find Full Text PDFStudy on the phase transformation mechanism and influencing factors of inorganic condensable particulate matter from coal-fired power plants.
Environ Pollut
November 2024
State Key Laboratory of Low-Carbon Smart Coal-Fired Power Generation and Ultra-Clean Emission, China Energy Science and Technology Research Institute Co., Ltd., Nanjing, 210023, China.
In this study, the concentration of inorganic ions (SO, NH, NO and NO) and morphological characteristics of condensable particulate matter (CPM) were investigated to elucidate the formation mechanism of inorganic CPM from ultra-low emission coal-fired power plants. The concentration of inorganic ions increased with the increase of HO content and concentration of inorganic gaseous contaminants (SO, NO and NH), and decrease of condensation temperature, indicating the enhancement of heterogenous reaction in the saturated flue gas. Furthermore, NO and SO could undergo redox reactions, leading to an elevation in the concentration of SO and NO.
View Article and Find Full Text PDFAnalysis of the airflow features and ventilation efficiency of an Ultra-Clean-Air operating theatre by qDNS simulations and experimental validation.
Build Environ
May 2024
School of Chemical Engineering, University of Birmingham, Edgbaston Campus, Birmingham, B15 2TT, United Kingdom.
Ultra-Clean-Air (UCA) operating theatres aim to minimise surgical instrument contamination and wound infection through high flow rates of ultra-clean air, reducing the presence of Microbe Carrying Particles (MCPs). This study investigates the airflow patterns and ventilation characteristics of a UCA operating theatre (OT) under standard ventilation system operating conditions, considering both empty and partially occupied scenarios. Utilising a precise computational model, quasi-Direct Numerical Simulations (qDNS) were conducted to delineate flow velocity profiles, energy spectra, distributions of turbulent kinetic energy, energy dissipation rate, local Kolmogorov scales, and pressure-based coherent structures.
View Article and Find Full Text PDFSimultaneously enhancing toluene adsorption and regeneration process by hierarchical pore in activated coke: a combined experimental and adsorption kinetic modeling study.
Environ Sci Pollut Res Int
June 2024
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China.
Activated coke is a type of commonly used adsorbent for benzene series VOCs such as toluene, but traditional microporous activated coke usually faces the challenge of poor regeneration performance. Herein, based on self-made activated cokes with typical pore configuration, we found that adsorption and regeneration of toluene can be simultaneously enhanced by constructing hierarchical pore in activated coke. Correlations of pore configuration with toluene adsorption capacity and regeneration efficiency reveal that micropore contributes for strong toluene adsorption; meso-macropore provides mass transfer channel for toluene desorption and regeneration process.
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