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Cited by 41 publications
(34 citation statements)
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“…4, indicate supersaturated conditions with respect to amorphous FO. The precipitation of an FO phase under these conditions has probably been kinetically inhibited by the abundance of arsenate and/or sulfate in the experiments (Swash and Monhemius, 1994;Langmuir et al, 1999 …”
Section: Stability Of Ferric Oxyhydroxide Phasesmentioning
confidence: 98%
“…4, indicate supersaturated conditions with respect to amorphous FO. The precipitation of an FO phase under these conditions has probably been kinetically inhibited by the abundance of arsenate and/or sulfate in the experiments (Swash and Monhemius, 1994;Langmuir et al, 1999 …”
Section: Stability Of Ferric Oxyhydroxide Phasesmentioning
confidence: 98%
“…FAsH crystallizes in the triclinic system [30] (confirmed via XRD [13] ) with the space group C i and Z = 4. The arsenate atoms lie on two different C 1 crystallographic symmetries and all the H 2 O molecules occupy C 1 sites.…”
Section: Ferric Arsenate Sub-hydratementioning
confidence: 99%
“…Whereas scorodite is a natural mineral which has been the subject of several mineralogical [3 -5] and processing [6 -12] studies, little is known about the other two phases that form in autoclaves by hydrothermal treatment of Fe(III)-AsO 4 3− -SO 4 2− solutions. Swash and Monhemius [13] were the first investigators to study the hightemperature (150 to 225 • C) Fe(III)-AsO 4 3− -SO 4 2− system. According to these investigators, two new ferric arsenate phases labeled 'Type 1' and 'Type 2' form in addition to scorodite (FeAsO 4 ·2H 2 O) and basic ferric sulfate (FeOHSO 4 ).…”
Section: Introductionmentioning
confidence: 99%
“…Chemical composition of the resultant bioscorodite products ([Fe] im /[As] im ratio) generally became closer to 1.0 (the theoretical ratio for scorodite) at higher initial As(III) concentrations (Table 3). Slightly higher [Fe] im /[As] im ratios (1.2-1.5) observed at lower initial As(III) concentrations may be due to incorporation of SO 4 2-, as was reported in abiotic hydrothermal [25][26][27][28] and atmospheric scorodite synthesis [7]. • For possible practical application using the continuous process (supposedly composed of an aeration tank followed by a settling tank), recycling microbiologically active bioscorodite sludge could maintain both high cell density and seed pulp density to support steady As(III) and Fe(II) oxidation and the resultant scorodite crystallization.…”
Section: Optimal Fe(ii)/as(iii) Molar Ratios For As Removal As Bioscomentioning
confidence: 54%