摘要
研究了一种自来水厂铝盐污泥对水中磷的去除特性。吸附试验表明,铝盐污泥(AlumSludge,AS)对磷的吸附符合Langmuir吸附等温方程,磷吸附容量高达12500mg/kg,其对磷的吸附随pH值的升高而降低,且随着AS和磷质量比的增加而增大。与单独使用混凝剂相比,在使用聚合氯化铝(PAC)混凝剂的同时加入AS能够提高磷的去除率,降低PAC的用量,AS能够强化对磷的去除效果。
The removal characteristic of phosphorus(P)from wastewater by alum sludge from waterworks was studied in adsorption test.The results showed that the phosphorus adsorption of alum sludge(AS)fitted the Langmuir adsorption isotherm equation,and phosphorus adsorption capacity was up to 12 500 mg/kg,while it went down with the increase of pH value and went up with the increasing mass ratio of AS and phosphorus.Compared with single use of coagulant,the simultaneous usage of polymeric aluminum chloride(PAC)and AS could improve the removal rate of phosphorus and reduce the amount of PAC,so AS could strengthen the removal effect of phosphorus.
基金
Supported by Key Project of National Water Pollution Control andManagement(2008ZX07316-004and2008ZX07101-004)
Scienceand Technology Planning Project of Anhui Province,China(08010302108)
Doctoral Program Foundation of North China Uni-versity of Water Resources and Electric Power(08010302108)
