One-pot synthesis of Ca-based magnetic hydrochar derived from consecutive hydrothermal and pyrolysis processing of bamboo for high-performance scavenging of Pb(Ⅱ) and tetracycline from water. (January 2022)

• Record Type: Journal Article
• Authors: Qu, Jianhua; Lin, Xiufeng; Liu, Ziyang; Liu, Yang; Wang, Ziyi; Liu, Shiqi; Meng, Qingjuan; Tao, Yue; Hu, Qi; Zhang, Ying
• Is Part Of: Bioresource technology. Volume 343(2022)
• Publication Date: 2022-01
• Subjects: Hydrochar -- Adsorption -- CaCO3 -- Pb(II) -- Tetracycline; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.126046
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Ca-based magnetic bamboo-derived hydrochar was synthesized by one-pot pyrolysis. CaCO3 and Fe 0 were loaded onto hydrochar surface via pyrolysis of CaCO3 and K2 FeO4 . Ca-MBHC possessed excellent uptake of Pb(II) (485.21 mg/g) and TC (142.44 mg/g). Complexation, reduction and electrostatic attraction were involved in Pb(II) binding. π-π stacking, pore filling and hydrogen bonding were responsible for TC uptake. Abstract: Ca-based magnetic bamboo-derived hydrochar described as Ca-MBHC was synthesized by one-pot pyrolysis, and was applied to remediation of lead (Pb) and tetracycline (TC) polluted water. Characterizations not only attested the loading of CaCO3 and Fe 0 onto the hydrochar, but also demonstrated the magnetism of Ca-MBHC. Adsorption kinetic experiments showed that the Ca-MBHC could eliminate Pb(II) and TC during a wide range of pH, and appeared rapid uptake equilibrium within 240 and 60 min for Pb(II) and TC, severally. Adsorption isotherm experiments showed that the Ca-MBHC possessed highest adsorption of 475.58 mg/g concerning Pb(II), and heterogeneous uptake of 142.44 mg/g for TC. Furthermore, the Ca-MBHC could achieve Pb(II) binding owing to complexation, reduction, ion exchange and electrostatic attraction, whereas the TC uptake might be related to π-π stacking reciprocities, pore filling and hydrogen bonding. Overall, the Ca-MBHC could be viewed as an excellent adsorbent for scavenging Pb(II) and tetracycline from water.