Determination of arsenic as electrogenerated arsine

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:5565192

Firsova, L Yu; Kovalenko, Yu A

The waste products from nonferrous metallurgy plants and the waters in contact with them contain, as a rule, arsenic and heavy metals at concentrations that exceed the permitted limits. The available methods for the determination of arsenic usually require its preliminary separation from impurities. However, the quantitative chemical generation of arsine in the presence of metal ions is difficult, because under the conditions of arsine evolution they can be reduced to the elemental state. This difficulty can be overcome by generating the arsine by electrolysis. Since the potentials of cathodic reduction of arsenic differ significant from the potentials for the reduction of metal ions (Cu, Cd, Pb, Zn, Fe) and, besides this, since arsine is formed after the adsorption on the electrode, metals do not interfere in the electrosynthesis of arsine. Arsenic is most frequently accompanied by copper(II) and iron(III). They have therefore investigated the influence of an excess of these ions on the electrochemical reduction of arsenic to the arsine.

• Research Organization: Water Household of Industrial Firms of the VNII VODGEO, Vladivostok, USSR
• OSTI ID: 5565192
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 53:1; ISSN INDLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105 -- Separation Procedures
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ARSENIC
ARSENIC COMPOUNDS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COPPER COMPOUNDS
DEMETALLIZATION
ELECTROLYSIS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INTERFERING ELEMENTS
IRON COMPOUNDS
LIQUID WASTES
LYSIS
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POTENTIOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
REDUCTION
SEMIMETALS
SEPARATION PROCESSES
TITRATION
TRANSITION ELEMENT COMPOUNDS
WASTE WATER
WASTES
WATER
WATER POLLUTION ABATEMENT