通过自制装置制备了交联海藻酸-亚铁氰化镍钾复合离子吸附剂(ALG-KNiFC),用扫描电镜、傅里叶红外光谱、EDS能谱等对吸附剂进行了表征.通过静态吸附实验,研究了吸附时间、pH值、Cs+初始浓度、共存离子等因素对吸附效果的影响.结果表明,吸附过程在3h左右达到平衡,吸附剂的饱和吸附容量为190 mg/g,ALG-KNiFC对Cs+的吸附能力在强酸性和强碱性环境下有所降低;含高浓度的共存金属离子溶液中,NH+对吸附的抑制效果最明显,使ALG-KNiFC对Cs+的去除率降低了20％左右,其他离子对去除率的影响均控制在10％以内.吸附热力学等模型对吸附机理的分析表明,AlG-KNiFC对Cs+的吸附属于单分子层化学吸附,吸附速率同时受膜扩散速率和颗粒内扩散速率的控制.%Alginate-potassium nickel hexacyanaferrate (ALG-KNiFC) composite adsorbent was synthesized by self-made device,and its structure was analyzed by utilizing the techniques of SEM,FT-IR and EDS.The effects of contact time,pH,initial concentration of Cs+,co-existing ions on Cs+ adsorption were investigated via batch experiments.Equilibrium is achieved after about 3 h,its saturated adsorption capacity is 190 mg/g,and its adsorption capacity decreases in the strong acidic or alkalic solution.NH/ which reduced 20％ of removal rate of Cs+ by adsorbent shows the most significant inhibitory effects among all the co-existing metal ions,with other ions within 10％.The analysis about adsorption mechanism according to thermodynamic model and other models indicates that Cs+ adsorption by ALG-KNiFC is monolayer and chemical,and intraparticle diffusion and liquid film diffusion control their rates of adsorption simultaneously.
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