Related Experiment Video
Updated: Jun 1, 2026

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems
Published on: December 24, 2014
Mobile aliphatic domains in humic substances and their impact on contaminant mobility within the matrix
Khanneh Wadinga Fomba1, Petrik Galvosas, Ulf Roland
1Department of Environmental Engineering, UFZ - Helmholtz Centre for Environmental Research, Leipzig, Germany. fomba@tropos.de
Abstract:
Using a novel NMR option, magic angle spinning pulsed field gradient (MAS PFG) NMR, the mobility of aliphatic domains in humic substances in the presence of toluene (about 4.5 wt. %) has been monitored. Results show a strong correlation between the diffusivities of the mobile aliphatic chains and those of the adsorbed toluene molecules in the matrix as a function of temperature. Particularly, a strong influence of structural relaxation of the humic matrix on the diffusivity of toluene is observed. Our findings confirm that the aliphatic domains in humic substances play an important role in the mobility of sorbed contaminants within this matrix. These findings further confirm the potential of MAS PFG NMR method in monitoring diffusion processes in particulate humic substances.
More Related Videos
12:55Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products
Published on: March 18, 2022
10:05Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation
Published on: July 4, 2014
Related Concept Videos
Microbial Bioremediation of Hydrocarbons
Analyte Adsorption and Distribution
Green Algae
Microbial Bioremediation of Uranium
Polymer Classification: Crystallinity
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
α-Halogenation of Carboxylic Acid Derivatives: Overview