Abstract
Sorbent samples based on the thermally activated precipitate formed in iron removal from under-ground water (water conditioning wastes) were studied by low-temperature nitrogen adsorption and thermal and X-ray analysis. The precipitate was found to be a material with a developed porous structure (the specific surface area of the initial sample was 229.9 m2/g). Calcining at 300°C decreased the specific surface area of the samples by 1.6–1.7 times and increased the volume of sorbing pores by 1.6 times. The precipitate material largely contained iron phases. An increase in the temperature of calcining contributed to deeper crystallization of the main phase, α-Fe2O3.
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