ArticleACS omega2026
Physicochemical Mechanisms and Environmental Benefits of Using Basic Oxygen Furnace Slag for Sewage Sludge Stabilization.
Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The increasing demand for inorganic alkalis in industrial processes, coupled with the environmental challenges of their production, has driven interest in sustainable alternatives. This study evaluates the feasibility of basic oxygen furnace (BOF) slag for sewage sludge stabilization by comparing its performance with commercial agents (NaOH and CaO) in batch hydrolysis experiments. The results reveal that BOF slag effectively increases the sludge pH to 12.4 at a dosage of 1.9 g/g of TSS. Although this dosage is higher than that required for NaOH (0.2 g/g) and CaO (1.0 g/g), BOF slag achieves comparable stabilization through a synergistic mechanochemical mechanism. Regarding heavy metals, BOF slag demonstrated superior immobilization capacity compared to caustic treatments; soluble lead (Pb) levels were maintained at 0.52 μg/g, significantly lower than the 9.2 μg/g release observed with NaOH. Pathogen reduction was notably effective, with
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