【摘要】 通过干渣对磷素等温吸附实验,考察了接触时间、粒径、pH值、铵盐、硝酸盐和阴离子表面活性剂六种因素对干渣吸附磷素的影响。结果表明,Langmuir等温吸附方程比Freundlich方程能更好地描述干渣的磷素吸附过程,其磷素理论饱和吸附量为769mg/kg。随着接触时间的延长,干渣对磷素的吸附量逐渐增大,24h后,对溶液中磷素的去除率达74%。pH值>9时,干渣对磷素的吸附作用迅速增强。铵盐和阴离子表面活性剂的存在,使干渣的磷素吸附量显著降低,而硝酸盐的存在则提高了干渣对磷素吸附量。更多还原

【Abstract】 Phosphorus adsorption of the blast furnace slag was studied through experiments on isotherm P adsorption.The influence of contacting time pH,grain size,ammonium,nitrate and anion-surfactant(AS) on P adsorption are discussed.Results showed that Langmuir adsorption isotherm was more suitable for describing the adsorption characteristics of the blast furnace slag than Freundlich model.The P saturation adsorption capacity was 769mg/kg.After 24 hours,the removal rate of P was 74%.The P adsorption capacity had closely relationship with pH and concentration of ammonium,nitrate and AS in the solution.When pH was higher than 9 the P adsorption capacity of blast furnace slag increased rapidly.The existence of ammonium salts and AS made the P adsorption capacity of furnace slag lower markedly while the existence of nitrate made the same capacity rising.更多还原