The use of coal containing high sulfur content for electric power is generating the SO2 produced during the burn of it. FGD (flue gas desulfurization) calcium sulfite(CaSO3) occurred as scrubbing process for remove of SO2 in the electric power plant. Calcium sulfite used for experiments was synthesized by mixing 6% sulfurous acid with calcium hydroxide. Oxidation of SO3 to SO4 were measured by spectrophotometer of SO4-S concentration by BaCl2 and SO4-S standard solution of K2SO4. Two different of silt and sandy soil mixed with CaSO3 (5.0Mg/ha), bactericide (200�g/g), and fungicide (2mg/g) were used for effect of microorganisms. The morphological features of soil, calcium sulfite, and precipitates after reaction with barium chloride that measured for SO4-S concentration were studied using a X-ray powder diffractometer (XRD) and scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS). Calcium sulfite (CaSO3) that synthesized by mixing of 6% sulfurous acid with calcium hydroxide composed mainly of hannebachite (CaSO3�0.5H2O) and small amounts of gypsum (CaSO4�H2O) by X-ray diffraction analysis. The effects that microorganism for oxidation of SO3 to SO4 very different result in silt and sandy soil.

Microbial effects for calcium sulfite (CaSO<sub>3</sub>) oxidation to calcium sulfate (CaSO<sub>4</sub>) in silt and sandy soil

243rd National Meeting (2012)

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Microbial effects for calcium sulfite (CaSO3) oxidation to calcium sulfate (CaSO4) in silt and sandy soil

Microbial effects for calcium sulfite (CaSO₃) oxidation to calcium sulfate (CaSO₄) in silt and sandy soil