Arsenic forms in mine-polluted sediments of Moira Lake, Ontario

Azcue, J.M.; Nriagu, Jerome O.

doi:10.1016/0160-4120(93)90131-z

Cited by 19 publications

(5 citation statements)

References 16 publications

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“…Phosphate and silicate are known to compete with arsenic for adsorption sites on the surface of iron solids ( − ), which suggests that As concentration should be lower in solids having high phosphate and silica concentrations. This was the case for the hydrant solids at utilities 6, 10, and 15 that added phosphate.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the structure of arsenate and arsenite sorption and coprecipitation on iron oxide surfaces has been investigated extensively ( 5 , − . Results have shown that the sorption of arsenic is affected by many factors including pH, water chemistry, amount and form of iron present, and existence of competing ions such as phosphate and silicate ( − ).…”

Section: Introductionmentioning

confidence: 99%

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Accumulation of Arsenic in Drinking Water Distribution Systems

Lytle

Sorg

Frietch

2004

Environ. Sci. Technol.

108

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The tendency for iron solid surfaces to adsorb arsenic is well-known and has become the basis for several drinking water treatment approaches that remove arsenic. It is reasonable to assume that iron-based solids, such as corrosion deposits present in drinking water distribution systems, have similar adsorptive properties and could therefore concentrate arsenic and potentially re-release it into the distribution system. The arsenic composition of solids collected from drinking water distribution systems (pipe sections and hydrant flush solids), where the waters had measurable amounts of arsenic in their treated water, were determined. The elemental composition and mineralogy of 67 solid samples collected from 15 drinking water utilities located in Ohio (7), Michigan (7), and Indiana (1) were also determined. The arsenic content of these solids ranged from 10 to 13 650 microg of As/g of solid (as high as 1.37 wt %), and the major element of most solids was iron. Significant amounts of arsenic were even found in solids from systems that were exposed to relatively low concentrations of arsenic (<10 microg/L) in the water.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accumulation of Arsenic in Drinking Water Distribution Systems

Lytle

Sorg

Frietch

2004

Environ. Sci. Technol.

108

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“…suggests that As is being released along this distance. An obvious source is elevated sediment concentrations that range from 450 to 900 fig/g in the surface sediments of the river (Rodie, unpublished data) and basins (30,31).…”

Section: Model Structurementioning

confidence: 99%

Application of a Mass Balance Model To Assess In-Place Arsenic Pollution

Diamond¹

1995

Environ. Sci. Technol.

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“…The release of arsenic from tailings piles and its transport in acid mine drainage is affected by adsorption/desorption onto iron-bearing phases (e.g., Foster et al, 1998;Savage et al, 2000;Carlson et al, 2002;Courtin-Nomade et al, 2003Donahue and Hendry, 2003;Fukushi et al, 2003;Moldovan et al, 2003;Morin et al, 2003;Paktunc et al, 2003Paktunc et al, , 2004Beaulieu and Savage, 2005;Walker et al, 2005). Arsenic concentrations in marine and lacustrine systems is often controlled, at least partially, by adsorption onto iron (oxyhydr)oxides (e.g., Devitre et al, 1991;Azcue and Nriagu, 1993;Pichler and Veizer, 1999;Linge and Oldham, 2004). One of the commonly-suggested methods of removal of arsenic from water supplies is through filtration based on adsorption by iron oxides (e.g., Katsoyiannis and Zouboulis, 2002;Thirunavukkarasu et al, 2003;Garelick et al, 2005;Jessen et al, 2005).…”

Section: Introductionmentioning

confidence: 98%