Warmeling of samples of marine sediments to room temperatures prior to the extraction of interstitial water accounts for the apparent enrichments of potassium ion (13.3 percent) and chloride ion (1.4 percent) and depletions of magnesium ion (2.5 percent) and calcium ion (4.9 percent). These differences are the result of changes in ion-exchange selectivity as a function of temperature.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.167.3922.1245 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Whisker-free lithium electrodeposition by tuning electrode microstructure.
Phys Chem Chem Phys
January 2025
N.N. Semenov Federal Research Center for Chemical Physics, Kosygina str 4, Moscow 119991, Russia.
Growth of lithium whiskers or dendrites is the major obstacle towards safe and stable utilization of lithium metal anodes in rechargeable batteries. In this study, we look deeper into the mechanism of lithium electrodeposition. We find that before lithium whisker or dendrite nucleation occurs, lithium is deposited into the grain boundaries of the metal electrode, which we directly observed in the focused ion beam cross-sections of the lithium electrode.
View Article and Find Full Text PDFExploring the synergistic effect of NaOH/NaClO absorbent in a novel wet FGD scrubber to control SOx/NOx emissions.
Environ Monit Assess
January 2025
International Joint Research Center For Green Energy and Chemical Industry, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
Escalating SOx and NOx emissions from industrial plants necessitates customized scrubbing solutions to improve removal efficiency and tackle cost limitations in existing wet FGD units. This work investigates the real-time intensified removal pathways via an innovative two-stage countercurrent spray tower configuration strategically integrating NaOH (M) and NaOH/NaClO (M/M) to remove SOx and NOx emissions simultaneously from the industrial stack through a comprehensive parametric study of absorbents concentration, reaction temperature, gas flow rate, liquid to gas ratio (F/F), and absorbent showering head. Flue gas stream comprising SO bearing 4500 ppm, SO bearing 300 ppm, 70 ppm NO, and 50 ppm NO brought into contact with two scrubbing solutions as M, and a complex absorbent of M/M at varying respective ratios.
View Article and Find Full Text PDFMolecular Weight-Dependent Boron Release Effect in PVA/Chitosan Cryogels and In Vitro Mineralization Evaluations by Osteoblast Cells.
Biopolymers
January 2025
School of Pharmacy and Bioengineering, Keele University, Keele, UK.
Cryogels were fabricated by combining polyvinyl alcohol (PVA) and chitosan of varying molecular weights (Mw). In this study, the effects of chitosan Mw, types of boron-containing molecules on network formation, and boron release rate in resulted cryogels were investigated. The PVA/chitosan blend maintained a constant 4.
View Article and Find Full Text PDFScalable production of bio-calcium oxide via thermal decomposition of solid - hatchery waste in a laboratory-scale rotary kiln.
Sci Rep
January 2025
Department of Environmental Technology, Faculty of Environment and Resource Studies, Mahasarakham University, Mahasarakham, 44150, Thailand.
Article Synopsis
- Chicken eggshell waste can be used as a renewable resource for producing bio-CaO quicklime, promoting sustainability and the circular economy.
- The study focuses on optimizing bio-CaO production from hatchery waste using a rotary kiln, experimenting with different preparation methods and conditions.
- Results showed that while increasing the kiln's filling volume had minimal impact, factors like particle size and the presence of the eggshell membrane significantly affected the yield and purity of the final product.
Success of Three Materials and Influence of Behavior Guidance in Primary Molar Pulpotomies : A Retrospective Study.
J Dent Child (Chic)
September 2024
Department of Endodontics, all in the College of Dentistry.
To assess the effectiveness of Biodentine (BD), mineral trioxide aggregate (MTA) and ferric sulfate (FS) as pulpotomy agents in primary molars and evaluate the impact of behavior guidance strategies on pulpotomy success. In this retrospective cross-sectional study, data from 374 cases (50.5 percent male, aged two to 10 years) undergoing 469 pulpotomies at a university pediatric clinic between April 1, 2016 and January 1, 2020 were analyzed.
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!