The radon adsorption coefficient of activated charcoal (K) has exponential relationship with temperature theoretically, but few experiment results of K at temperature below 0 ℃ were given. In this study, K were measured using a flow-through system with activated charcoal in cylindrical adsorption beds at temperature adjusted from room temperature to -48°C using liquid nitrogen. Results are consistent with theory and show that the adsorption coefficient at -48°C is nearly 25 times higher than that at 23 ℃.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.apradiso.2017.04.023 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Typical Case of Converter Smelting with High Cooling Ratio in Chinese Iron and Steel Enterprises: CO Emission Analysis.
Materials (Basel)
December 2024
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China.
In this study, the effects of using different scrap ratios in a converter on carbon emissions were analyzed based on life cycle assessment (LCA) theory, and the carbon emissions from the converter were evaluated with the use of coke and biochar as heating agents at high scrap ratios. In this industrial experiment, the CO emissions during the converter smelting process decreased with the increase in the scrap steel ratio. For every 1% increase in the scrap steel ratio, the carbon emissions during the steelmaking process decreased by 14.
View Article and Find Full Text PDFCo-application of polyethylene oxide (PEO), biochar, and seaweed fertilizer improves desert soil properties.
Sci Rep
January 2025
School of Emergency and Management, Changchun Institute of Technology, No. 3066 Tongzhi Street, Changchun, 130021, Jilin, China.
Improving water retention, erosion resistance and nutrients in desert areas is essential for ecological sustainability. This study evaluated the effects of biochar, polyethylene oxide (PEO), and seaweed fertilizer on the properties of desert sandy soil, focusing on water retention, erosion resistance, and soil nutrients. The sandy soil used in the study was taken from the Tengger Desert in Gansu, China, and an orthogonal experimental design was used to select three different proportions of biochar, PEO, and seaweed fertilizer.
View Article and Find Full Text PDFReconstructing the environmental impact of mining on mountain lakes.
Sci Total Environ
January 2025
Instituto Geológico y Minero de España (CSIC), Ríos Rosas 23, ES-28003 Madrid, Spain. Electronic address:
Mountain lakes are particularly fragile ecosystems undergoing important ecological and depositional transformations associated with ongoing global change. However, the history of anthropogenic impacts on mountain lakes and their catchments is much longer, in many cases featuring millennia of summer pastoral farming. More recently, the growing demand for raw materials and energy linked to industrialization, particularly accelerated since the 19th century CE, meant a further increase in human impact on mountain areas.
View Article and Find Full Text PDFEcofriendly and biocompatible biochars derived from waste-branches for direct and efficient solid-phase extraction of benzodiazepines in crude urine sample prior to LC-MS/MS.
Mikrochim Acta
January 2025
School of Public Health, Hebei Key Laboratory of Occupational Health and Safety for Coal Industry, North China University of Science and Technology, No. 21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China.
Biochars (BCs) derived from waste-branches of apple tree, grape tree, and oak were developed for direct solid-phase extraction (SPE) of five benzodiazepines (BZDs) in crude urine samples prior to liquid chromatography-tandem mass spectrometry (LC-MS/MS) determination. Scanning electron microscopy, elemental analyzer, X-ray diffractometry, N adsorption/desorption experiments, and Fourier transform infrared spectrometry characterizations revealed the existence of their mesoporous structure and numerous oxygen-containing functional groups. The obtained BCs not only possessed high affinity towards BZDs via π-π and hydrogen bond interactions, but also afforded the great biocompatibility of excluding interfering components from undiluted urine samples when using SPE adsorbents.
View Article and Find Full Text PDFPhenobarbital toxicosis in a pied butcherbird, Cracticus nigrogularis.
Aust Vet J
January 2025
Currumbin Wildlife Sanctuary Hospital, Currumbin, Queensland, Australia.
A wild, adult male pied butcherbird (Cracticus nigrogularis) accidentally ingested 263 mg/kg of oral phenobarbital. Pronounced sedation was observed by 30 mins, followed by altered consciousness, marked ataxia and increased respiratory effort. The serum phenobarbital level on admission to a wildlife hospital was 84.
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!