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    Potassium alum crystal derived from aluminum salt in water treatment sludge by nanofiltration

    The major method used for the recovery of aluminum from water purification sludge is through acidification or alkalization, however, the cost of the acid and alkali limits the amount available for use, and thu...

    Fung Hwa Chi, Wen Po Cheng, Dun Ren Tian… in Journal of Material Cycles and Waste Manag… (2015)