Accession Number : ADA332071

Title :   Adsorption of Hazardous Compounds to Mineral Surfaces.

Descriptive Note : Final technical rept. 15 Mar 94-31 May 97,

Corporate Author : WYOMING UNIV LARAMIE DEPT OF CHEMISTRY

Personal Author(s) : Carron, Keith T. ; Buttry, Daniel A. ; Drever, James ; Vance, TGeorge ; Allen, Myron

PDF Url : ADA332071

Report Date : 14 OCT 1997

Pagination or Media Count : 26

Abstract : The project entitled 'Adsorption of Hazardous Compounds to Mineral Surfaces' involved five faculty members from the University of Wyoming's Departments of Chemistry, Geology, Soil Science, and Mathematics. The contribution from each individual research is enclosed in this final report. The results include two methods of modifying clays with cationic surfactants to enhance the adsorption of organic contaminants; modification of clays with cyclodextrins; studies of small aci adsorption to minerals; FTIR studies of adsorption to silicates; and stochastic analysis of flows in soils. The work with modified clays has lead to quantitative relationships that can be used to predict the sorptive behavior of yet untested modifiers. This data can be used to design improved treatment walls. Both Canon and Vance worked on a variety of contaminants to demonstrate these relationships. We synthesized a new surfactant that contains chlorines and showed enhanced sorption of chlorinated ethylenes. Buttry and Drever showed that small acids such as oxalic are capable of adsorbing to silica and can chelate with the mineral surface. The strong chelation is believed to lead to weathering or dissolution of the mineral surface. Buttry also showed that FTIR can be used to follow adsorption kinetics and to study surfactants adsorbed to mineral surfaces.

Descriptors :   *HAZARDS, *ADSORPTION, *SOILS, *ORGANIC COMPOUNDS, *CONTAMINANTS, STOCHASTIC PROCESSES, SILICON DIOXIDE, GEOLOGY, SURFACES, CHEMISTRY, ORGANIC MATERIALS, CLAY, SURFACE ACTIVE SUBSTANCES, MATHEMATICS, CHLORINATION, DEXTRINS, SORPTION, SILICATES, MINERALS, HAZARDOUS MATERIALS, ACIDS, ETHYLENES, SOIL SCIENCE.

Subject Categories : Organic Chemistry
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE