改性粉煤灰处理含磷废水的试验研究

Experimental Study on Phosphorus-Containing Waste Water Treatment by Modified Fly Ash

摘要: 针对环境水体磷超标严重的现象，选用酸改性粉煤灰作吸附材料，对含磷废水进行净化处理。考察了灰-炭比、静置吸附时间和溶液pH等因素对磷去除率的影响。试验发现：当灰–炭比为4:1，静置吸附时间为2 h，pH在3~10的范围内，可以将废水中磷的质量浓度从3.298 mg/L降到0.198 mg/L，去除率均超过90%以上。结果表明：粉煤灰与活性炭混合物经酸改性后对废水中磷去除效果良好。

Abstract: According to the phenomenon of phosphorus exceeds the standard in the environmental water body, acid modified fly ash was used as adsorbent material for purifying waste water containing phosphorus. Effects of factors such as ash carbon ratio, static adsorption time, solution pH and other factors on the removal rate of phosphorus were studied. It was found that when the ash carbon ratio was 4:1, the static adsorption time was 2 hours, pH was in the range of 3 - 10, and the concentration of phosphorus in waste water could be reduced from 3.298 mg/L to 0.198 mg/L, and the removal rate was more than 90%. The results showed that the mixture of acid modified fly ash and activated carbon had a good effect on the removal of phosphorus from waste water.