Activation of grapefruit derived biochar by its peel extracts and its performance for tetracycline removal. (November 2020)

• Record Type: Journal Article
• Authors: Yu, Haixiang; Gu, Lin; Chen, Lu; Wen, Haifeng; Zhang, Daofang; Tao, Hong
• Is Part Of: Bioresource technology. Volume 316(2020)
• Publication Date: 2020-11
• Subjects: Grapefruit peel -- Peel extracts -- Biochar -- Tetracycline -- Adsorption; 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.2020.123971
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlight: GP extracts was used as novel activator to prepare GP based biochar. The biochar had more abundant O-containing groups for TC adsorption. Pore structure, charge effect and molecular interaction control TC adsorption onto GPBC. The prepared GPBC adsorbed TC rapidly with high qe per unit surface area. Abstract: A novel adsorbent derived from grapefruit peel (GP) based biochar (GPBC) was synthesized by combined carbonization of GP and subsequent activation by GP extracts. Compared to biochar without extracts activation, the technique granted GPBC-20 (with 1:20 of solid-solution ratio) more abundant surface functional groups, which exerts the adsorbent superior performance for tetracycline (TC) adsorption (37.92 mg/g v.s. 16.64 mg/g). The adsorption kinetics, isotherms and thermodynamics models were further used to evaluate the adsorption behavior of GPBC. The enhanced adsorption was analyzed by characterization of fresh and used GPBC, revealing that the adsorption mechanism was comprised of pore filling, charge interaction and chemical bonding. The comprehensive investigation of using agricultural waste extracts as activator to prepare its raw materials-based adsorbents may be of great significance for enhanced resource utilization.