The sorption of arsenic onto activated carbon impregnated with metallic silver and copper

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208019434· OSTI ID:7263609

Rajakovic, L V ^[1]

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1. Univ. of Belgrade (Yugoslavia)

The adsorption of arsenic species in aqueous solutions onto activated carbon with and without chemical impregnation has been studied. The ability of activated carbon to adsorb arsenic depends on the arsenic oxidation state, the pH of the water, and the activity of the metal used for the activated carbon impregnation. The results of the investigations have shown that physical adsorption is effective only for the arsenic(V) species in water. Activated carbon adsorbs arsenic(V) with a saturation adsorption capacity of 0.27 mmol/g. The chemisorption process is effective for both arsenic species. By impregnation of activated carbon by copper is 0.41 and 0.23 mmol/g for the arsenic(III) and arsenic(V) species, respectively. The pH values of the water are important for both sorption processes because of the change in the ionic forms of both arsenic species. The optimal pH range is between 4 and 9, which is a consequence of the apparent affinity between the carbon surface and arsenic species H{sub 3}AsO{sub 3} and H{sub 2}AsO{sub 4}{sup {minus}} that are predominant at this pH in water. Equilibrium isotherm analyses were undertaken using Langmuir and Freundlich equations.

• OSTI ID: 7263609
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 27:11; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
ADSORPTION ISOTHERMS
ARSENIC
AUGER ELECTRON SPECTROSCOPY
CAPACITY
CARBON
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISORPTION
CONTROL
COPPER
DATA
ELECTRON SPECTROSCOPY
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
IMPREGNATION
INFORMATION
ISOTHERMS
KINETICS
LIQUID WASTES
METALS
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
POLLUTION CONTROL
SEMIMETALS
SEPARATION PROCESSES
SILVER
SORPTION
SORPTIVE PROPERTIES
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS
VALENCE
WASTE WATER
WASTES
WATER
WATER POLLUTION CONTROL