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The combustion characteristics and gas emissions behavior of Low-calorie Indonesian coal (LC), Shaanxi coal (SC), and Datong coal (TC) were analyzed by a thermogravimetric-Fourier transform infrared spectrometer (TG-FTIR). The results showed that LC was the easiest coal to burn, followed by SC and TC. The main components of LC ash were alkali metals and alkaline earth metals (AAEMS), while SC and TC were clay minerals. The catalytic activity of LC ash was higher than that of SC and TC ash. FTIR results indicated that the main functional groups of three coals were CO, CO, HO, phenols, C = O, and C-H during combustion. The absorbance peaks of CO, CO, SO, and HCN against temperature showed single peak characteristics, while NO was the bimodal peak. The total CO emission of LC was 1.04 and 1.25 times that of SC and TC. Compared to LC and SC, TC had the highest total CO and SO emissions. The total NO emission of LC, SC, and TC was 0.21, 0.21, and 0.16. The study results provide the guidance for selection of coals and control the emission of gas products in the thermal power plant.
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http://dx.doi.org/10.1007/s11356-025-36065-4 | DOI Listing |
Phys Chem Chem Phys
September 2025
School of Materials Science and Engineering, Changchun University of Science and Technology Changchun, 130022, Jilin, People's Republic of China.
The synergistic effect of various ions with optical properties is an important method to regulate the Er ion upconversion luminescence process. However, the energy processes between them are complicated and difficult to separate, and it is challenging to clarify the results of each process when multiple ions are co-doped. Herein, a series of NaYF:Er were synthesized by the low-temperature combustion method, and the luminescence color of Er ions was modulated by doping Yb ions and Tm ions.
View Article and Find Full Text PDFEnviron Res
September 2025
Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA.
Background: Fine particulate matter (PM) has been previously linked to cardiovascular diseases (CVDs). PM is a mixture of components, each of which has its own toxicity profile which are not yet well understood. This study explores the relationship between long-term exposure to PM components and hospital admissions with CVDs in the Medicare population.
View Article and Find Full Text PDFBiomater Adv
August 2025
Laboratory of Experimental Medicine, Department of PG Studies and Research in Biotechnology, Kuvempu University, Shankarghatta 577451, Karnataka, India. Electronic address:
Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive cancer with poor prognosis and chemoresistance. Nano-bioconjugates, due to their enhanced surface-to-volume ratio, offer significant potential in cancer therapy. In this study, we synthesized ZnO nanoparticles (NPs) using solution combustion method and exhibited a particle size range of 20-70 nm as confirmed by TEM analysis.
View Article and Find Full Text PDFJ Forensic Leg Med
September 2025
China People's Police University, Langfang, 065000, China.
Forensic identification at fire scenes faces three core challenges: distinguishing cause of death (antemortem burning versus postmortem corpse burning), reconstructing criminal behavior (arson versus accident), and preserving evidence (thermal destruction versus artificial tampering). This case study systematically demonstrates the application value of burn trace characteristics in arson investigation through a typical intentional homicide and corpse burning case. Based on a three-dimensional analytical framework of human burn-behavioral characteristics, a systematic pathway incorporating reconstruction of arson/corpse burning processes and identification of body relocation behavior was established.
View Article and Find Full Text PDFTob Control
September 2025
Medical Practice Evaluation Center, Massachusetts General Hospital, Boston, Massachusetts, USA
Background: As part of its COVID-19 response, South Africa banned tobacco sales between March and August 2020. We examined self-reported tobacco use before, during and after the ban among a rural South African population with high HIV prevalence.
Methods: Between May 2021 and November 2022, we conducted a telephonic survey on tobacco use among a purposively selected subset of a population-based cohort in rural KwaZulu-Natal.