| 王璐璐,王冠华,隋文杰,司传领.ZnCl2络合法分离黑液木质素高效制备高吸附性能活性炭[J].中国造纸学报,2023,38(2):1-11 |
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| ZnCl2络合法分离黑液木质素高效制备高吸附性能活性炭 |
| Efficient Preparation of Activated Carbon with High Adsorption Capacity Using Lignin-Zn Complex from Black Liquor |
| 投稿时间：2022-06-07 |
| DOI：10.11981/j.issn.1000-6842.2023.02.01 |
| 中文关键词: 黑液 木质素-锌络合物 活性炭 染料吸附 |
| Key Words:black liquor lignin-Zn complex activated carbon dye adsorption |
| 基金项目:国家自然科学基金（32071721）；天津市青年英才资助计划（TJSQNTJ-2020-05）；国家重点研发计划子项目“农产品产区土壤环境质量评价与分类标准研究”（2018YFF0213402）；山东省重大科技创新项目（2018CXGC0220）；湖南省重点领域研发计划（2019NK2032）。 |
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| 中文摘要: |
| 采用ZnCl2络合的方式从黑液中分离出木质素并获得木质素-锌络合物，将其作为前驱体，经碳化高效制备高吸附性能活性炭（CAC）。结果表明，经ZnCl2络合（0.5 mol/L ZnCl2，0.6 mL/mL黑液）后，黑液中分离出89.5%的木质素，络合处理后黑液的CODCr值降低72.4%，pH值呈中性。同时，金属络合作用使得锌离子均匀分布在木质素-锌络合物中，有助于碳化过程中多孔结构的均匀分布。与传统酸析木质素浸渍工艺相比，木质素-锌络合物碳化法制备的活性炭具有更高的比表面积和吸附量。所制备的CAC活性炭对阳离子亚甲基蓝和阴离子甲基橙的最大平衡吸附量分别为1046.8和263.6 mg/g，优于大多数研究报道制备的吸附剂的吸附量。 |
| Abstract: |
| Lignin-Zn complex isolated from black liquor by ZnCl2 complexation was used as the carbon precursor to prepare activated carbon with high adsorption performance. The results showed that after ZnCl2 complexation （0.5 mol/L ZnCl2， 0.6 mL/mL black liquor）， 89.5% of lignin in black liquor was isolated accompanied with CODCr reduction of 72.4% and neutral pH value for the treated black liquor. Meanwhile， the metal complexation rendered Zn2+ distributing evenly in the lignin-Zn complex， facilitating the well-proportioned formation of porous structure during carbonization process. The activated carbon prepared from lignin-Zn complex had higher specific surface area and adsorption capacity， compared with the conventional process of acid-precipitated lignin by impregnation. Moreover， maximum equilibrium adsorption capacities of the as-prepared activated carbon were 1046.8 mg/g and 263.6 mg/g for cationic methylene blue and anionic methyl orange， respectively， which were higher than those absorbents prepared in previous reports. |
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