A novel nitrogen-doped porous carbon derived from black liquor for efficient removal of Cr(VI) and tetracycline: Comparison with lignin porous carbon. (20th January 2022)

• Record Type: Journal Article
• Authors: Tian, Yuxin; Zhou, Haifeng
• Is Part Of: Journal of cleaner production. Volume 333(2022)
• Publication Date: 2022-01-20
• Subjects: Black liquor -- Nitrogen-doped porous carbon -- Adsorption -- Cr(VI) -- TC; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.130106
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The direct preparation of adsorption materials from black liquor (BL) produced by the kraft pulping process has great potential in wastewater treatment. A three-dimensional nitrogen-doped porous carbon (N-BLSAC) with high specific surface area and large pore volume was synthesized. The adsorption performance of N-BLSAC for Cr(VI) and tetracycline (TC) was systematically investigated. Compared with the porous carbon prepared from purified lignin (N-PLAC), the adsorption performance of N-BLSAC for TC was more superior. It was not only attributed to the pore-filling effect but also the electrostatic interaction, hydrogen bonding, and π-π electron-donor-receptor. In terms of Cr(VI), the adsorption performance of N-BLSAC and N-PLAC had little difference. Moreover, N-BLSAC and N-PLAC exhibited an excellent anti-interference property. Therefore, the porous carbon prepared by direct carbonization of BL has significant advantages in removing Cr(VI) and TC from aqueous solution. Graphical abstract: Image 1 Highlights: Black liquor was directly used to prepare high surface area activated carbon (N-BLSAC). The lignin-based porous carbon (N-PLAC) was also prepared for comparison. The adsorption performance of N-BLSAC was superior to N-PLAC. The adsorption mechanism of Cr(VI) and TC on N-BLSAC was proposed.