Sulfur-doped zero-valent iron supported on biochar for tetracycline adsorption and removal. (15th December 2022)

• Record Type: Journal Article
• Authors: Meng, Yang; Chen, Xu; Ai, Dan; Wei, Taiqing; Fan, Zhiping; Wang, Bo
• Is Part Of: Journal of cleaner production. Volume 379:Part 2(2022)
• Publication Date: 2022-12-15
• Subjects: Ball milling -- Biochar -- Zero-valent iron -- Sulfur -- Tetracycline -- Adsorption; 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.2022.134769
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: BM-S/ZVI@BC was further synthesized from common agricultural waste maize straw and applied to the adsorption of aqueous tetracycline using a simple ball milling method. SEM, XRD, FTIR, and XPS were used to characterize the structural features and surface properties of BM-S/ZVI@BC. The effects of time, temperature, pH, and interfering ions on the adsorption were investigated, and the adsorption performance and possible mechanisms of BM-S/ZVI@BC on tetracycline were explored. The results showed that the adsorption of tetracycline by BM-S/ZVI@BC was more inclined to acidic conditions, The higher the temperature, the better the adsorption of tetracycline, and the maximum saturation adsorption capacity of BC/S/Fe 0 in the optimum ratio of 2:1:1 was up to 505.68 mg ·g −1 at a temperature of 313 K, and the adsorption process was both physical and chemical. The electrostatic interaction, hydrogen bonding, π-π stacking, and complexation are the main mechanisms of tetracycline adsorption by BM-S/ZVI@BC. BM-S/ZVI@BC had excellent oxidation resistance and good adsorption performance for tetracycline after aging in the air (60 d) and water (120 h). BM-S/ZVI@BC maintained a high adsorption capacity after five times of reuse and had a good removal capacity for tetracycline in different water bodies. In conclusion, BM-S/ZVI@BC had a good application prospect for tetracycline removal in water. Graphical abstract: Image 1 Highlights: The maximum saturated adsorption capacity of TC by BM-S/ZVI@BC was 505.68 mg ·g −1 . BM-S/ZVI@BC had good adsorption properties for TC after aging in air and water. TC removal by electrostatic effect, hydrogen bonding, π-π stacking, complexation. Provided a new idea and method for treating waste with waste.