摘要
采用混合酸对粉煤灰进行改性,研究其在二级出水中对磷的去除效果。在静态吸附条件下,研究了改性粉煤灰吸附水样中磷的影响因素,实验结果表明:选用酸改性的粉煤灰,投加量为5g/L处理磷浓度1.0mg/L的污水,吸附时间30min,pH在6～8,对磷去除率达98%。粉煤灰对磷的吸附数据很好得符合Fre-undlich公式,吸附参数表明粉煤灰对磷吸附过程容易进行,改性粉煤灰可作为污水深度处理中除磷的吸附剂。
The removal of phosphours in secondary effluent by modified fly ash was studied. The influ- ence of factors on the removal effficency of phosphate were investigated under static adsorption condi- tions. It was found that the removal efficiency of phosphate could reach above 98% under the condi- tions of pH range 6~8, room temperature, phosphate initial concentration of 1.0mg/L, throwing about 5g/L with the adsorption time of 30min. The fitting results showed that the adsorption process could be described by Freundlich formula. Modified fly ash can be used as an adsorbent to remove the phos- phate in advanced treatment of sewage.
出处
《安徽建筑工业学院学报（自然科学版）》
2011年第6期91-94,共4页
Journal of Anhui Institute of Architecture(Natural Science)
基金
国家水体污染控制与治理科技重大专项(2008ZX07316-002)
安徽高校省级自然科学研究重点项目(KJ2010A067)
关键词
粉煤灰
改性
污水厂尾水
磷
吸附
fly ash modification
tail water of wastewater treatment plant
phosphorus
adsorption
