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| Efficient Preparation of Activated Carbon with High Adsorption Capacity Using Lignin-Zn Complex from Black Liquor |
| Received:June 07, 2022 |
| DOI：10.11981/j.issn.1000-6842.2023.02.01 |
| Key Words:black liquor;lignin-Zn complex;activated carbon;dye adsorption |
| Fund Project: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）。 |
| Author Name | Affiliation | Postcode | | WANG Lulu* | College of Light Industry Science and Engineering， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | WANG Guanhua | College of Light Industry Science and Engineering， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | SUI Wenjie | College of Food Science and Engineering， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | SI Chuanling | College of Light Industry Science and Engineering， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 |
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| 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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