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在温和的条件下合成了一种多孔吸附剂——4-十二烷基苯胺改性SiO_2,用于各种染料的去除。将合成的吸附剂装入固相萃取柱中用于阴、阳离子染料的去除,以罗丹明B和甲基蓝作为模型,考察了材料的吸附特性。通过一种简单的萃取装置,pH=2~4下,对各种染料能够实现有效去除。结果表明这种吸附适配于Langmuir模型,罗丹明B和甲基蓝的最大吸附量分别达到3.53和3.83mg/g,吸附材料具有良好的重用性,可以作为低代价的吸附剂用于阴、阳离子染料的有效去除。
In a mild condition, a porous adsorbent - 4-dodecyl aniline modified SiO 2 was synthesized for the removal of various dyes. The adsorbents were loaded into the solid phase extraction column for the removal of anionic and cationic dyes. The adsorption characteristics of the materials were investigated with rhodamine B and methyl blue as the model. Through a simple extraction device, pH = 2 ~ 4, the various dyes can be effectively removed. The results show that the adsorption is suitable for the Langmuir model. The maximum adsorption amount of Rhodamine B and Methyl blue are 3.53 and 3.83 mg / g, respectively. The adsorbent has good reusability and can be used as a low-cost adsorbent for overcast, Effective removal of cationic dyes.