改性粉煤灰处理校园池塘富营养化水体的研究

Study on the adsorption process of schoolyard eutrophia wastewater by modified coal fly ash

采用化学改性的粉煤灰为吸附材料,以校园池塘富营养化水体为吸附对象,研究了改性方法、灰水比、粒径、搅拌时间及pH值对CODCr去除率的影响。结果表明,酸改性粉煤灰COD Cr去除效果优于碱改性粉煤灰;弱酸性的水样环境可提高酸改性粉煤灰的吸附效果;当以灰水比1∶10加入过180目筛的酸改性粉煤灰,快速搅拌2 min(160 r/min),慢速搅拌10 min(100 r/min),静置30 min,CODCr去除率可达91%。

The adsorption process of schoolyard eutrophia wastewater by choosing chemical modified coal fly ash as sorbing materials is studied. And the following influencing factors are considered：modified methods, solid-liquid ratio, particle size, mixing time and pH. The results show that the removal effect of CODcr by acid modified fly ash is prefer to that of alkali modified fly ash. And the weakly acidic circum- stance is especially suitable for removal effect of CODcr by acid modified fly ash. While the solid-liquid ratio is l：10,and the particle size of acid modified fly ash is 180 mesh, and the mixing time is different： fast mixing time is 2 rain（ 160 r/min） first,then slow mixing time is 10 rain（ 100 r/min） ,in the end,the stewing time is 30 min,the removal effect of CODcr can reach 91%.