Award Date

1-1-1997

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Committee Member

David W. Emerson

Number of Pages

71

Abstract

Insoluble, macroporous styrene-divinylbenzene copolymers bearing redox N-alkyl-N-chlorosulfonamide functional groups were used for removal of cyanide from aqueous solutions. These resins contain active chlorine and show oxidative properties. The use of these resins for oxidation of cyanide to less or nontoxic compounds was investigated in aqueous media containing different concentrations of cyanide and different pH values. Examples of the use of these resins as a polymer-supported reagent for oxidation of cyanide under static and dynamic conditions were given. Active chlorine readily oxidizes cyanide to cyanate. The decomposition of cyanate was also studied. The two decomposition methods investigated were oxidation with redox resin and hydrolysis using a cation exchange resin (H{dollar}\sp+{dollar} form). The data show that the cyanate is easily hydrolyzed, but is difficult to oxidize. During the oxidation process the {dollar}-{dollar}SO{dollar}\sb2{dollar}NClR groups are transformed to {dollar}-{dollar}SO{dollar}\sb2{dollar}NHR groups. They can be reactivated by the use of hypochlorite solutions.

Keywords

Cyanide; Decomposition; Ion; Polymers; Redox

Controlled Subject

Chemistry, Analytic; Polymers; Polymerization; Chemistry

File Format

pdf

File Size

1720.32 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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