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·134· 精细化工 FINE CHEMICALS 第 37 卷

吸附逐渐饱和，等温吸附线达到平衡，25 ℃时，饱 度为 40 mg/L、温度 25 ℃、pH7 的条件下反应 2 h，
和吸附量为 19.98 mg/g，很难继续提高。 Mg-GAC 除铜性能最好，最佳吸附量为 11.66 mg/g。
根据 Langmuir 和 Freundlich 模型对图 6 实验数 （2）利用表面积及孔径分析仪、X 射线衍射分
据进行线性拟合，拟合图及参数分别见图 7、表 4。 析仪、扫描电镜对改性活性炭进行了表征，结果表
明，氢氧化镁成功地负载于活性炭上。活性炭表面
的微观特性被改变，作者制备的改性活性炭较原活
性炭比表面积和总孔容积都有所增加。
（3）Langmuir 模型可以较好地描述改性活性炭
对 Cu(Ⅱ)的吸附，说明该吸附为单层吸附。

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（1）在 Mg-GAC 投加量为 0.3 g、Cu(Ⅱ)质量浓 （下转第 146 页）