The distribution of sorbates in the channels at various temperatures. The loading of sorbates is 4 molecules per unit cell for all temperatures. 1. Introduction Recently, we have proposed ab initio fitted potentials representing the n-pentane/silicalite-1 interaction

The contributions of organic matter and the mineral surface to the overall sorption of six nonpolar neutral organic compounds (1,2,4-trichlorobenzene, 1,4-dichlorobenzene, chlorobenzene, m-xylene, toluene, benzene) by five humic acid (HA)-coated sands with different fractions of organic carbon (f(oc)) ranging from 0.024% to 0.154% were evaluated on the basis of measured data and four different ...

OBJECTIVE To determine if a causal connection exists between food additives and various medical complaints. DESIGN Literature study. METHOD Medline over the period January 1966-January 1999 was searched for articles on the following substances not containing protein and lactose: monosodium glutamate (MSG), sulfites, azo-dyes (tartrazine, sunset yellow, azorubin, amarant, cochineal red), ben...

The functional shape of a sorption isotherm is determined by underlying molecular interactions. However, doubts have been raised on whether the mechanism can be understood in principle from analyzing curves via range competing models. We shown recently that it possible to translate interactions rigorous statistical thermodynamics. aim this paper fill gap between thermodynamic theory and experim...

Plant cuticles have been reported as highly efficient sorbents for organic compounds. The objective of this study was to elucidate the sorption and desorption behavior of polar and nonpolar organic compounds with the major structural components of the plant cuticle: the biopolymers cutin and cutan. The sorption affinity values of the studied compounds followed the order: phenanthrene > atrazine...

A device and a method for sample preparation have been developed, which make it possible to implement successive stages of thermal separation volatile components from solid (liquid) matrix, their capture the gas phase by sorbent, liquid microextraction sorbates further chromatographic analysis. The algorithm its application GC–MS determination number organic compounds matrices with complex chem...

In this paper, we demonstrate the potential of pulsed field gradient (PFG) NMR spectroscopy to reveal detailed knowledge of self-diffusion of light gases and light gas mixtures in carbon molecular sieve membranes on small length scales. PFG NMR is used to investigate intra-membrane diffusion of carbon dioxide and methane for a broad range of temperatures and mean square displacements in a carbo...

Abstract Background Phytotoxins of various classes and origin are often found in their cationic form the soil environment thus, overall behavior may be strongly affected by all geosorbents presenting cation exchange capacity (CEC). In addition to organic carbon (SOC), clays exhibit great potential as sorbents for chemicals. Therefore, 52 compounds major phytotoxin alkaloids, terpenoids steroids...