新生MnO_2对水中酸性媒介深黄GG的吸附脱色作用

Adsorptive decolourization of acid mordant yellow GG on the fresh MnO_2

以化学法合成的新生 Mn O2 作吸附剂 ,对水中酸性媒介深黄 GG进行吸附脱色研究 ,探讨了影响吸附的因素。结果表明 ,该吸附剂在 p H1.5以下、投加量为 0 .3 mg/L、温度为 15℃条件下 ,饱和吸附量达 13 2 0 mg/g,脱色率达 96%以上 ,具有很高的吸附脱色能力。 p H值是影响吸附能力的关键因素 ,温度、染料浓度和 Mn O2 投加量影响程度较小。

The decolourization efficiency of an aqueous solution of acidic mordant yellow GG using fresh MnO\-2 synthesized by chemical process as an adsorbent was studied. Influencing factors of adsorption were investigated in detail. The experimental results showed that the adsorptive ability of the fresh MnO\-2 was very strong. The saturated adsorptive capacity was up to 1320 mg/g and the efficiency of decolourization reached over 96% on the condition that the amount of the fresh MnO\-2 added was 0.3 mg/L, the temperature was 285 K and the pH value was bellow 1 5. The key effect on decolourization was pH value of initial solution, whereas the effect of temperature, the concentration of the dye solution and the amount of the fresh MnO\-2 were not efficient. \;