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Silicic acid and soluble Fe are among the most abundant components in acid mine drainage. During the oxidation of Fe(II), the interaction between silicic acid and freshly formed Fe oxides might change the colloidal dynamics, altering surface charge properties. However, the effects of silicic acid on colloidal Fe oxides formed from acid mine drainage are not fully understood. In this work, we examined the colloidal dynamics of freshly formed Fe oxides in synthetic acid mine drainage (prepared from FeSO solution) under the effect of silicic acid as a function of changes in pH and ionic strength. The results demonstrate that through adsorption, silicic acid progressively slows oxidation and enhances the dispersion of freshly formed Fe oxides by shifting the surface charge toward more negative values. This effect was most prominent between pH 5 and 9. The current results demonstrate that silicic acid enhances the dispersion and transport of freshly formed Fe oxides and suggest that aggregation-based techniques for the treatment of Fe-rich drainage may require further consideration of this effect.
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Nhung T Hoang, and
Anh T N Nguyen, and
Huan X Nguyen, and
Phuong M Nguyen, and
Khai M Nguyen, and
Minh N Nguyen
August 2022,
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Anh T N Nguyen, and
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Phuong M Nguyen, and
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Minh N Nguyen
August 1949,
Science (New York, N.Y.),
Than T N Dam, and
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Huan X Nguyen, and
Phuong M Nguyen, and
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Minh N Nguyen
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Biochimica et biophysica acta,
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South African journal of laboratory and clinical medicine. Suid-Afrikaanse tydskrif vir laboratorium- en kliniekwerk,
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January 1967,
Pathologia Europaea,
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January 2002,
Journal of colloid and interface science,
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November 1954,
Archiv fur Hygiene und Bakteriologie,
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Huan X Nguyen, and
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Minh N Nguyen
March 1955,
Archiv fur Hygiene und Bakteriologie,
Than T N Dam, and
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Anh T N Nguyen, and
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Phuong M Nguyen, and
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January 1954,
Schweizerische Zeitschrift fur Pathologie und Bakteriologie. Revue suisse de pathologie et de bacteriologie,
