镁盐改性活性炭对普拉红B的吸附性能研究

Study on adsorption of weak acid red B on activated carbon modified by magnesium salt

运用化学沉淀-原位复合法制得氢氧化镁/活性炭复合材料（Mg（OH）2/AC）,对其比表面积和XRD谱进行了表征,考察了该复合材料对普拉红B的脱色性能。结果表明,在293-313 K下,Langmuir模型和Freundlich模型都能很好地描述Mg（OH）2/AC对普拉红B的等温吸附过程,而Langmuir模型更为合适。溶液初始浓度为250 mg/L,吸附剂用量为0.1 g,吸附时间为90 min,温度为313 K是Mg（OH）/AC吸附普拉红B的最佳条件。

Magnesium hydroxide/activated carbon composite was prepared by chemical precipitation compounding in situ.The surface area and poresize distribution of the composite were characterized.The removal of weak acid red B by the composite was investigated.Be superior to Freundlich model,Langmuir model fit to the adsorption of the dye at 293~313 K.Orthogonal experiments showed that the initial concentration of solution was the most important factor.The optimum adsorption effect was achieved under the following conditions： adsorption of solution with initial concentration of 250 mg/L at 313 K for 90 min by 0.1 g Mg（OH）2/AC.