A novel lysine and EDA double cross-linked graphene aerogel (LEGA) was constructed. The prepared LEGA was utilized as a methylene blue (MB) adsorbent in the wastewater treatment. It exhibits a three-dimensional interconnected porous structure benefiting dye adsorption. Its compression property is highly enhanced with the addition of lysine. Adsorption isotherm and kinetics of MB onto LEGA were discussed. Their results show that MB adsorption onto LEGA was fitted to follow Langmuir adsorption isotherm model and the pseudo-second-order kinetic model. LEGA has an excellent adsorption capacity towards MB as high as 332.23 mg/g and its MB adsorption process is proved to be an exothermic process. The mechanism for MB adsorption onto LEGA was proposed as the ion exchange, electrostatic interaction, π-π stacking interaction and hydrogen bonding. Thus, LEGA is confirmed to be a sustainable and green MB adsorbent with highly removal efficiency in the treatment of wastewater.

构建了新型的赖氨酸和EDA双交联石墨烯气凝胶（LEGA）。制备的LEGA用作废水处理中的亚甲基蓝（MB）吸附剂。它表现出有利于染料吸附的三维互连多孔结构。加入赖氨酸可大大提高其压缩性能。讨论了MB在LEGA上的吸附等温线和动力学。他们的结果表明，MB对LEGA的吸附符合Langmuir吸附等温线模型和拟二级动力学模型。LEGA对MB的吸附能力高达332.23 mg / g，并且MB吸附过程被证明是放热过程。提出了MB吸附在LEGA上的机理为离子交换，静电相互作用，π-π堆积相互作用和氢键。从而，