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The pH-dependent transformation of schwertmannite to goethite at 25°C

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Abstract:

At 25–C, synthetic schwertmannite, a common iron compound in acid mine drainage, completely converted in water to a sulphate-containing goethite within ∼100 days. The rate of transformation doubled as the pH increased from 4.0 to 7.2. In deviation from its normal acicular habit, the goethite appeared as spherical aggregates.

Keywords: GOETHITE; PH; RT; SCHWERTMANNITE; SEM; TRANSFORMATION; XRD

Document Type: Research Article

DOI: http://dx.doi.org/10.1180/0009855054010155

Publication date: March 1, 2005

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minsoc/cm/2005/00000040/00000001/art00005
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