科研之友
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摘要
A kind of steel slag sludge ceramsite catalyst was prepared by solid phase mixing method, and the relatively developed pore structure was observed in its SEM images. The XRD pattern indicted that the active components were distributed in this ceramsite with MnO2 and CuO crystals. The steel slag sludge ceramsite catalyst was used to treat the biochemical tail water of the saline refinery wastewater, and the effects of initial pH of tail water, catalyst dosage and ozone dosage on chemical oxygen demand (COD) removal were studied. The results indicated that at the initial pH of 7.36, catalyst dosage of 15 g·L-1, ozone dosage of 4.21 mg·min-1, the COD of tail water could be reduced from 86.97 mg·L-1 to 48.02 mg·L-1 after 35min catalytic ozonation, and the effluent could meet the newly revised Emission Standards of Petroleum Refining Industrial Pollutants. The prepared ceramsite catalyst has the advantages of stable activity, long service life and low dissolution rate of manganese and copper, as well as no secondary pollution.
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