摘要：

采用HCl、KCl、NaOH和Fe（NO₃）₃四种活化剂预处理褐煤，制备得到了活性炭吸附剂，分析了不同活化剂处理获得的褐煤活性炭的比表面积、孔容和吸附性能，研究了不同活化剂处理对活性炭吸附废水中Mn²⁺的影响。结果表明：负载KCl制备得到的煤基活性炭比表面积和孔容最大；在吸附剂投加量为5 g，温度为25℃，pH=7，吸附时间为60 min时，对水体中的Mn²⁺去除率顺序为：K-AC > Na-AC > H-AC > SL-AC > Fe-AC，K-AC对Mn²⁺的去除率达到97.4%。

关键词: 褐煤, 催化, 活性炭制备, 矿山废水, Mn²⁺吸附

Abstract:

The activated carbon adsorbents were prepared by pretreatment of lignite with HCl, KCl, NaOH and Fe(NO₃)₃ activators. The specific surface area, pore volume and adsorption properties of lignite activated carbon obtained by different activator treatments were analyzed. The effects of different activator treatment on the adsorption of Mn²⁺ in wastewater by activated carbon were also studied. The results showed that the specific surface area and pore volume of the coal-based activated carbon prepared by loading KCl was the largest, when the adsorbent dosage was 5 g, the temperature was 25℃, the pH was 7 and the adsorption time was 60 min, the order of the removal rates of Mn²⁺ in the water was:K-AC > Na-AC > H-AC > SL-AC > Fe-AC, and the removal rate of Mn²⁺ by K-AC reached 97.4%.

Key words: lignite, catalysis, activated carbon preparation, mine wastewater, Mn²⁺ adsorption

中图分类号: 

• TQ424

• X703