金属氧化物改性粉煤灰处理含磷废水的研究

Research on Treatment of Phosphorus Wastewater by Fly Ash Modified by Metal Oxide

以金属氧化物对粉煤灰进行改性,并利用所得到的改性灰对模拟含磷废水进行处理,探究了改性灰对含磷废水处理效果的影响。试验结果表明:以等质量的氧化钙对等质量的粉煤灰进行改性为最优改性条件;在进行处理时,当处理体系p H值为10,处理时间为10 min,改性粉煤灰投加量为0.5 g/25 m L(50 mg/L)含磷废水时,金属氧化物改性粉煤灰对含磷废水的磷去除率可达到97.96%,远高于其它手段处理所得改性灰的处理效果。说明利用金属氧化物对粉煤灰的进行改性后所得的改性灰是为处理含磷废水的一种有效手段。

Simulated phosphorus wastewater was treated by the fly ash modified by metal oxide. Effect of the modification process of fly ash and reaction conditions on the treatment result of the wastewater was investigated. The results show that the best modifying condition is that ratio of calcium oxide to fly ash is 1：1;the best reaction conditions are as follows：the processing system pH 10, the processing time 10 min, the optimal dosage of modified fly ash was 0.5g/25 mL. After treatment of the phosphorus wastewater by the modified ash under the optimum conditions, the removal rate of phosphorus can reach to 97.96%.