中文摘要：

采用批实验方法研究了人工合成铁、铝矿物对As（V）的吸附,考察吸附时间及溶液pH值对As（V）吸附的影响.结果表明,不同类型铁、铝矿对As（V）的吸附量均表现出随初始As（V）浓度（0.1-100mg/L）的增加而增加的趋势,其中水铁矿的吸附量在整个浓度范围内始终呈上升趋势,初始浓度为100mg/L As（V）时的吸附量为22.56mg/g,而针铁矿、水铝矿和赤铁矿的吸附量在低初始浓度时上升较快,随浓度升高上升幅度减缓直至平衡,其中赤铁矿的吸附量最小,100mg/L As（V）时的吸附量为4.75mg/g.Freundlich方程对吸附数据的拟合效果优于Langmuir方程,吸附能力表现为水铁矿最高,水铝矿和针铁矿相近,赤铁矿较低.随着吸附时间的增加,4种铁、铝矿物对As（V）的吸附量都逐渐增加,尤其是水铁矿,10min内即达到平衡吸附量的96.3%;水铝矿和针铁矿在48h时吸附量分别为平衡吸附量的97.2%和97.4%;赤铁矿则需96h才基本达到平衡.除水铁矿外,4种动力学方程对其他矿物动力学曲线的拟合均较好,尤其是双常数方程.pH值对矿物吸附As（V）的影响受As（V）初始浓度的影响,初始浓度较低时,铁、铝矿的吸附量仅在极碱条件下（pH〉10）降低,而初始浓度较高时则表现为随pH值升高直线下降的趋势.

英文摘要：

Batch experiments were used to investigate arsenate adsorption by synthetic iron and aluminum oxides/hydroxides.The effects of adsorption time and pH on the adsorption behavior were also studied.The results showed that,As（V） adsorption by four iron and aluminum oxides/hydroxides increased with initial As（V） concentrations（0.1~100 mg/L）,in which ferrihydrite showed a rising adsorption trend in the whole concentration range,with the adsorption amount of 22.56 mg/g at the initial As（V） of 100 mg/L.While the rapid increase in lower initial concentration and slow change in higher initial concentrations for the adsorption capacities of goethite,gibbsite,and hematite were obtained.When the initial As（V） reached 100mg/L,the least adsorption capacity of 4.75mg/g was received for hematite.Furthermore,the Freundlich equation fitted the data better than the Langmuir equation.The adsorption capacity of ferrihydrite is the highest,followed by goethite and gibbsite,and hematite shows lower adsorption capacity.With the increase of adsorption time,As（V） adsorption amount of four synthetic iron and aluminum oxides/hydroxides increased gradually,especially for ferrihydrite,reaching 96.3% of adsorption equilibrium in 10 minutes.The adsorption amount of goethite and gibbsite reached 97.4% and 97.2% of the equilibrium at 48h,respectively,while hematite required 96 hours to reach the equilibrium.Except ferrihydrite,four equations fitted the kinetic data better,especially the two-constant equation.The effect of pH on As（V） adsorption was associated to As（V） initial concentrations.In lower initial concentrations,adsorption of four synthetic iron and aluminum oxides/hydroxides decreased only under extremely alkaline conditions（pH10）,and when the initial concentrations were higher,adsorption amount dropped sharply with pH increasing.