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231224s2014 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2014.178
|2 doi
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|a pubmed24n0801.xml
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|a (NLM)25051466
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Mohajane, G B
|e verfasserin
|4 aut
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|a Treatment of iron(II)-rich acid mine water with limestone and oxygen
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|c 2014
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 11.09.2014
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|a Date Revised 07.12.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a The main components of acid mine water are free acid, sulphate, and Fe²⁺. Limestone is the most cost-effective alkali that can be used for neutralization. The purpose of this investigation was to identify conditions where Fe²⁺ is removed with limestone and simultaneously oxidized with oxygen to Fe³⁺, in a polyvinyl chloride pipe under pressure. Gypsum scaling is prevented by passing rubber balls through the pipe of the so-called Oxygen-Pipe-Neutralization (OPeN) process pilot plant. Two synthetic waters were treated: (A) acid mine water containing 123 mg L⁻¹ Fe²⁺ representing gold mine water, and (B) acid mine water containing 6,032 mg L⁻¹ Fe²⁺ representing coal mine water. Batch studies were carried out in a pipe reactor and showed that the rate of Fe²⁺ oxidation depended on the Fe²⁺ concentration, oxygen pressure, amount of recycled sludge, limestone dosage and the mixing rate. Continuous studies in an OPeN process pilot plant resulted in 100% removal of total acidity from synthetic coal mine water and a 98% removal from synthetic gold mine water. Fe²⁺ was removed completely as precipitated Fe(OH)₃ from both synthetic coal and gold mine water at around pH 7 at 200 and 100 kPa oxygen pressure, respectively
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|a Journal Article
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|a Industrial Waste
|2 NLM
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|a Waste Water
|2 NLM
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|a Water Pollutants, Chemical
|2 NLM
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|a Iron
|2 NLM
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|a E1UOL152H7
|2 NLM
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|a Calcium Carbonate
|2 NLM
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|a H0G9379FGK
|2 NLM
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|a Oxygen
|2 NLM
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|a S88TT14065
|2 NLM
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1 |
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|a Maree, J P
|e verfasserin
|4 aut
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|a Panichev, N
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 70(2014), 2 vom: 19., Seite 209-17
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnns
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| 773 |
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|g volume:70
|g year:2014
|g number:2
|g day:19
|g pages:209-17
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|u http://dx.doi.org/10.2166/wst.2014.178
|3 Volltext
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