We have investigated the composition of the mobile natural organic matter (NOM) present in Callovo-Oxfodian pore water using electrospray ionization mass spectrometry (ESI-MS), atmospheric pressure chemical ionization mass spectrometry (APCI-MS) and emission-excitation matrix (EEM) spectroscopy. The generation of knowledge of the composition, structure and size of mobile NOM is necessary if one wants to understand the interactions of these compounds with heavy metals/radionuclides, in the context of environmental studies, and particularly how the mobility of these trace elements is affected by mobile NOM. The proposed methodology is very sensitive in unambiguously identifying the in situ composition of dissolved NOM in water even at very low NOM concentration, due to innovative non-disturbing water sampling and ionization (ESI/APCI-MS) techniques. It was possible to analyze a quite exhaustive inventory of the small organic compounds of clay pore water without proceeding to any chemical treatment at naturally occurring concentration levels. The structural features observed were mainly acidic compounds and fatty acids as well as aldehydes and amino acids.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/rcm.4374 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An experimental study on the synergic damage of chemical solutions and stress to coal.
Sci Rep
January 2025
CSIRO Mineral Resources, Brisbane, QLD, 4069, Australia.
This paper investigates the impact of treatment with chemical solutions of varying pH values on the micro-macroscopic damage in coal samples under load, employing a combination of Small Angle X-ray Scattering (SAXS) experiments and uniaxial compression tests. The experimental results show that soaking coal samples in NaOH, HCl, and distilled water for 7 days leads to reductions in uniaxial compressive strength by 39.19%, 47.
View Article and Find Full Text PDFAnalysis of geological characteristics and potential factors of formation damage in coalbed methane reservoir in Northern Qinshui basin.
Sci Rep
January 2025
School of petroleum engineering, Yangtze University, Wuhan, 430100, China.
Given the suboptimal physical properties and distinctive geological conditions of deep coalbed methane reservoirs, any reservoir damage that occurs becomes irreversible. Consequently, the protection of these deep coalbed methane reservoirs is of paramount importance. This study employs experimental techniques such as scanning electron microscopy, X-ray diffraction, and micro-CT imaging to conduct a comprehensive analysis of the pore structure, mineral composition, fluid characteristics, and wettability of coal seams 3# and 15# in the northern Qinshui Basin of China.
View Article and Find Full Text PDFAchieving up to 95% removal efficiency of chlorpyrifos pesticide using sugarcane bagasse-based biochar alginate beads in a continuous fixed-bed adsorption column.
Environ Res
January 2025
Department of Chemical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India - 603202.
Pesticide contamination in wastewater poses a significant environmental challenge, driven by extensive agricultural use. This study evaluates the removal of chlorpyrifos (CPS) using sugarcane bagasse-based biochar alginate beads in a continuous fixed-bed adsorption column, achieving a remarkable 95-98% removal efficiency. Compared to conventional adsorbents like activated carbon, which typically show CPS adsorption capacities ranging from 50-70 mg g⁻ under similar conditions, the biochar alginate beads demonstrate better performance with a sorption capacity of 91.
View Article and Find Full Text PDFQuantification of microplastics released from plastic food containers during rinsing and migration by pyrolysis-gas chromatography/mass spectrometry.
Food Chem
January 2025
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
In this study, a pyrolysis-gas chromatography/mass spectrometry method was established to quantify microplastics (MPs) released from plastic food containers during rinsing and migration. The inner surface of actual samples was rinsed with deionized water, and the MPs in rinse water were collected through a glass fiber membrane with pore size of 1 μm. Subsequently, thoroughly cleaned polypropylene (PP) food packaging containers were selected for migration tests under different simulants, migration temperatures, and migration times.
View Article and Find Full Text PDFPore formation mechanism and size regulation study of atmospheric dried cellulose nanofiber aerogel templated by emulsions.
Int J Biol Macromol
January 2025
College of Textile Science & Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China. Electronic address:
Atmospheric pressure drying (APD) method holds great promise in the large-scale production of aerogels without specialized equipment and critical conditions. However, atmospheric-dried cellulose- based aerogels are challenged by the collapse of the pore walls induced by the capillary force that arises during solvent evaporation. This study prepared an atmospheric dried cellulose nanofiber (CNF) aerogel with a low shrinkage rate (17.
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!