Oxidized active carbon fiber ( OACF) was prepared with HNO3 as the oxidizing agent to active carbon fiber ( ACF). The adsorption and separation for indium ( Ⅲ) and iron ( Ⅲ) was investigated from sulfuric acid medium with OACF. The adsorption ability of activated carbon fiber increased obviously after oxi-dation. It was shown that the adsorption capacity for In(Ⅲ) or Fe(Ⅲ) was increased with increasing pH,and the adsorption equilibrium time was 15 min. The Langmuir adsorption isotherm was suitable for simulating the adsorption process. Column adsorption separation experiments showed that the OACF for In(Ⅲ) or Fe(Ⅲ) had large adsorption capacity,and could carry out the preliminary separation.%以 HNO3为氧化剂,对活性碳纤维(ACF)表面进行改性,得到氧化活性碳纤维(OACF)。以静态和动态实验法考察 OACF 在酸性体系中吸附分离 In(Ⅲ),Fe(Ⅲ)的性能。 OACF 在溶液中对 In(Ⅲ),Fe(Ⅲ)的吸附量随 pH 的增加而增加,氧化后活性碳纤维的吸附能力较氧化前明显增大,15 min 即可完全达到吸附平衡。 Lang-muir 吸附模型能较好地反映纤维的吸附过程。动态吸附分离实验表明,OACF 对 In(Ⅲ),Fe(Ⅲ)均具有较大的吸附能力,并能对其进行初步分离。
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