The adsorption performance of a novel adsorbent: glutaradehyde crosslinking modified spirulina for Cr6+ was investigated and the modification condition was studied through the orthogonal test. The results showed that; the influence degree of different factors on Cr6+ removal by modified spirulina was ranked as: mass fraction of glutaraldehyde > initial pH value > modification time > spirulina dosage; and then, the optimal experimental condition was determined as follows: the mass fraction of glutaradehyde was 6%, the initial pH value was 1, the spirulina dosage was 0.5 g, the modification time was 4 h. Besides, the adsorption capacities of the raw spirulina and the modified spirulina were compared. The results showed that: at room temparature, for 100 mL of solution with Cr6+ mass concentration of 80 mg/L, the best adsorption effect of the above two kinds of spirulina could be obtained when the spirulina dosage was 0.4 g and the pH value was 3. The maximum adsorption quantity of the raw spirulina and the modified spirulina reached 7 889.5 and 14 424.5 μg/g respectively according to the calculation results of the Langmuir kinetic equation.%利用戊二醛对螺旋藻进行交联改性制备新型吸附剂吸附Cr6+研究.采用正交试验法对戊二醛改性螺旋藻吸附Cr6+的改性条件进行研究,结果显示:各因素对改性藻吸附Cr6+的影响由大到小的顺序为:戊二醛质量分数＞初始pH值＞改性时间＞藻类投加量,最佳试验条件为:戊二醛质量分数为6％,初始pH值为1,藻类投加量为0.5 g,改性时间为4h.对原藻和改性后的藻吸附能力进行对比研究,结果显示:室温下对于100 mL Cr6+的质量浓度为80 mg/L的溶液,在藻的投加量为0.4 g、pH值为3时吸附效果最好.原藻和改性藻的Langmuir动力学方程的最大吸附量分别可达到7 889.5、14 424.5 μg/g.
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