酸改性粉煤灰对含磷污水处理的实验研究
Environmental Science & Technology(2011)
Abstract
文章利用不同种类的酸对粉煤灰进行了改性处理,并将制备的酸改性粉煤灰用于对含磷废水的处理.实验结果表明:原粉煤灰对含磷废水均有一定的除磷效果,当pH值在4~10,当反应时间40min,粉煤灰投加量为70g/L和80g/L时,含磷100 mg/L的原水经处理后含磷量为0.60 mg/L和0.44 mg/L,分别达到《污水综合排放标准》(GB9878-1996)中二级和一级磷的排放标准.硫酸改性粉煤灰对含磷废水的处理效果有明显改善.酸改性粉煤灰投加量分别为7 g/L、10 g/L时,在pH值4~10范围内对含磷100 mg/L的进行处理,反应时间5min后,出水中含磷量为0.68 mg/L和0.24 mg/L,分别达到《污水综合排放标准》(GB9878-1996)中二级和一级磷的排放标准.
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Key words
phosphorus-containing wastewater,fly ash,acid modified fly ash,removal rate of phosphorus
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