The use of conventional petrochemical-based carbon precursors, high-energy pyrolysis-based carbonization processes, and difficulties in designing sustainable processes using activated carbon have hampered the sustainable production of activated carbon and its use in wastewater treatment processes. In this study, to overcome these limitations in the production and application of existing petrochemical-based activated carbon as a water treatment material, biomass-based kraft lignin was used as an eco-friendly carbon precursor. In addition, to increase process efficiency, activated carbon was prepared using energy-intensive microwave-assisted carbonization and applied to the dye wastewater removal process. First, kraft lignin was successfully converted into microporous activated carbon within 10 min through microwave-assisted carbonization and chemical activation processes. As a result, kraft lignin-derived activated carbon showed excellent adsorption capacity for MB of 543.82 mg/g and AO of 548.54 mg/g, respectively. In addition, through heat treatment using microwaves (low power conditions of 450 W, treatment within 2 min), it was possible to successfully achieve thermal decomposition of the adsorbed dye and recovery of the pores and texture properties of activated carbon. Finally, kraft lignin-derived activated carbon showed an excellent reuse efficiency of more than 97 %, even under the condition of reuse 5 times.

中文翻译：

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微波辅助利用牛皮纸木质素衍生活性炭有效去除染料


传统的基于石化的碳前体的使用、基于高能热解的碳化工艺以及使用活性炭设计可持续工艺的困难阻碍了活性炭的可持续生产及其在废水处理工艺中的使用。在本研究中，为了克服现有石化活性炭作为水处理材料的生产和应用中的这些限制，生物质基硫酸盐木质素被用作环保碳前体。此外，为了提高工艺效率，采用高能微波辅助碳化制备活性炭，并将其应用于染料废水去除工艺。首先，通过微波辅助碳化和化学活化过程，硫酸盐木质素在 10 分钟内成功转化为微孔活性炭。结果，牛皮纸木质素衍生活性炭对 MB 和 AO 分别表现出优异的吸附能力，吸附能力分别为 543.82 mg/g 和 548.54 mg/g。此外，通过微波热处理（450W低功率条件，2分钟内处理），可以成功实现吸附染料的热分解以及活性炭孔隙和质地特性的恢复。最后，硫酸盐木质素衍生活性炭即使在重复使用 5 次的情况下也表现出超过 97% 的优异重复使用效率。