Separation of arsenic(III) and arsenic(V) in ground waters by ion-exchange

Ficklin, Walter H.

doi:10.1016/0039-9140(83)80084-8

Cited by 176 publications

(85 citation statements)

References 7 publications

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“…Birnessite from these samples was dissolved in HC1 in a microwave digestion vessel and the solutions analyzed by ICAPES. As(III) and As(V) in solution were separated with ion-exchange columns (Ficklin, 1983) and analyzed by ICAPES. As(III) and As(V) in birnessite was determined by dissolving the solid in hot 4 M HC1 and separating the two oxidation states by ion exchange (W. C. Ficklin, U.S. Geol.…”

Section: Methodsmentioning

confidence: 99%

Reaction Scheme for the Oxidation of as(III) to as(V) by Birnessite

Moore

Walker

Hayes

1990

Clays and clay miner.

100

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Abstract--The oxidation of As(III) to As(V) by K-birnessite was examined at different temperatures, pHs, and birnessite/As(III) ratios. Experiments ranged in duration from 5 to 64 hr, and solution and solid products were determined at several intervals. All experiments showed that the reaction produced large amounts of K + to solution and very little Mn 2+. As(V) was released to solution and incorporated into the K-birnessite. The oxidation was initially rapid and then slowed. The oxidation of As(III) was probably facilitated initially by autocatalytic Mn-As(V) reactions occurring mostly in the interlayer, in which large amounts of As(V) and K + could be easily released to solution. The reaction also slowed when interlayer Mn was exhausted by forming Mn-As(V) complexes. Mn(IV) could only be acquired from the octahedral sheets of the birnessite. The two-stage reaction process proposed here depended on the layered structure of birnessite, the specific surface, and presence of exchangeable cations in K-birnessite.

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Section: Methodsmentioning

confidence: 99%

Reaction Scheme for the Oxidation of as(III) to as(V) by Birnessite

Moore

Walker

Hayes

1990

Clays and clay miner.

100

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“…Samples from diurnal investigations of the Madison River near Norris and at Three Forks in July and August 1993 were analyzed for As by the Montana Bureau of Mines and Geology in Butte, Montana, by inductively coupled plasma mass spectroscopy (ICP-MS). Speciation of inorganic As was determined by ion exchange [Ficklin, 1983] by Walter H. Ficklin, USGS, Denver, Colorado. Suspended-sediment concentrations were determined by the USGS, Helena, Montana, according to methods described by Guy [1969] and Lambing and Dodge [1993].…”

Section: Dissolved and Total-recoverablementioning

confidence: 99%

The fate of geothermal arsenic in the Madison and Missouri Rivers, Montana and Wyoming

Nimick¹,

Moore²,

Dalby³

et al. 1998

Water Resources Research

127

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Abstract. Geothermal As from Yellowstone National Park causes high As concentrations (10-370/•g/L) in the Madison and Missouri Rivers in Montana and Wyoming. Arsenic transport is largely conservative in the upper basin as demonstrated by the near equivalence of dissolved and total-recoverable As concentrations, the constancy of As loads, and consistent ratios of concentrations of As to conservative geothermal tracers. Diurnal cycling of As between aqueous and solid phases in response to p H-induced changes in sorption equilibria causes small variations of about 10-20% in dissolved As concentrations. HCl-extractable As concentrations in river and lake sediment in the upper basin are variable depending on position relative to the As-rich headwaters and geochemical and physical processes associated with lakes. In the lower Missouri River, large quantities of suspended sediment from tributaries provide sufficient sorption sites for substantial conversion of As from the aqueous phase to the solid phase. This study was undertaken to determine the fate of As as it moves through more than 1140 km of river and several lakes in a large river system. We chose the Madison-Missouri River system in Montana and northwestern Wyoming because the high arsenic concentrations make it an excellent natural laboratory to examine the geochemistry of As on a basin-wide scale. The general goal of the study was to develop a more 3051

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“…And pH was adjusted by adding (1:1) H 2 SO 4 or 1N NaOH. Separation of As(III) and As(V): As(III) and As(V) were separated by using Analytic grade AG® 1x8 100-200 mesh resin (acetate form) by the method described by Ficklin [15]. The resin was packed into a glass column of 10 cm height and 12mm diameter.…”

Section: Chemicalsmentioning

confidence: 99%

Arsenic removal from waste water by ozone oxidation combined with ferric precipitation

Zhang

Yang

2017

Mong. J. Chem.

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Abstract:The oxidation of As(III) to As(V) followed by precipitation and adsorption is thought to be the most effective process for removal of arsenic in industrial wastewater. In this work, the oxidation of As(III) to As(V) with ozone was carried out in an acidic solution. After oxidation, arsenic was removed by precipitation in an iron (III) sulfate system under ambient pressure at 90°C in acid. Batch experimental results show that ozone is quite effective in oxidizing As(III) at low pH. And more than 90% of 5g/l As(III) was removed from the acidic solution by precipitation with Fe 2 (SO 4 ) 3 in 7-8 hours. Key words: Arsenate, Arsenite, Ozone, Oxidation, Precipitation INTRODUCTIONRecently, the toxic behavior of arsenic is receiving increased attention as the arsenic pollution has been reported worldwide. Arsenic is a common element which is widely distributed throughout the rock, soil, natural water and marine environments and associated with some base and precious metals in the sulfide ores [1][2][3]. Hereupon, the mining and metallurgical industries have expended considerable research efforts to develop environmentally acceptable methodologies for the arsenic removal from waste water. Under natural conditions As is mostly found in inorganic forms as trivalent arsenite (As(III)) or as oxyanions of pentavalent arsenate (As(V)). In comparison with As(V), As(III) is high mobile and more difficult to be removed from the aqueous solution. All of the arsenic precipitation work carried out involved both ferric iron and pentavalent arsenic in solution, based on the substantially correct premise [2,4]. It is necessary to oxidize the trivalent arsenic to its pentavalent state before the arsenic removal. A lot of researchers focused on the methods for oxidation of As(III) to As(V) using different oxidants [5][6][7]8]. In several studies, ozone applications have been reported for treatment of wastewater and water, but very few studies are for oxidation of As [6][7][8][9][10]. The most characteristic chemical properties of ozone are its strong oxidizing and high standard redox potential according to the reaction conditions. It is strong oxidizing nature and its tendency to transfer an O atom with coproduction of O 2 [4]. The standard redox potentials in acid (1) and in alkaline (2) solutions are the following reactions.

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Separation of arsenic(III) and arsenic(V) in ground waters by ion-exchange

Cited by 176 publications

References 7 publications

Reaction Scheme for the Oxidation of as(III) to as(V) by Birnessite

Reaction Scheme for the Oxidation of as(III) to as(V) by Birnessite

The fate of geothermal arsenic in the Madison and Missouri Rivers, Montana and Wyoming

Arsenic removal from waste water by ozone oxidation combined with ferric precipitation

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