Phosphorus Removal from Lake Water Using Basic Oxygen Furnace Slag: System Performance and Characterization of Reaction Products
作者： Syed I. Hussain , David W. Blowes , Carol J. Ptacek , Daniel Olding
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摘要: Abstract Effectiveness of basic oxygen furnace slag (BOFS) for removing dissolved phosphorus (P) was evaluated in a hypolimnetic withdrawal system. Lake water collected from the hypolimnion, with phosphate (PO4-P) concentrations 0.25 to 0.49 mg/L, passed through pilot-scale (pore volume, ∼0.87 m3) treatment system over two successive summers. In year 1, hydraulic retention time (HRT) varied 0.58 1.64 days and 96.1–98.1% PO4-P removed. The HRT 2 0.31 0.48 removal 97.4–99.9%. Effluent pH 11.37±0.17 11.96±0.17 years 1 2, respectively, increase attributed dissolution CaO Ca(OH)2 BOFS. effluent neutralized by addition CO2(g) before discharged. Vanadium aluminum were released BOFS, subsequently removed filter containing 5 wt.% granular zero valent iron balance silica sand neutralizing pH. Solid phase analyses conducted on ...
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