Application of Biochar Derived From Pyrolysis of Waste Fiberboard on Tetracycline Adsorption in Aqueous Solution

Abstract

In this study, biochars derived from waste fiberboard biomass were applied in tetracycline (TC) removal in aqueous solution. Biochar samples were prepared by slow pyrolysis at 300, 500, and 800 • C, and were characterized by ultimate analysis, Fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), etc. The effects of ionic strength (0-1.0 mol/L of NaCl), initial TC concentration (2.5-60 ppm), biochar dosage (1.5-2.5 g/L), and initial pH (2-10) were systemically determined. The results present that biochar prepared at 800 • C (BC800) generally possesses the highest aromatization degree and surface area with abundant pyridinic N (N-6) and accordingly shows a better removal efficiency (68.6%) than the other two biochar samples. Adsorption isotherm data were better fitted by the Freundlich model (R 2 is 0.94) than the Langmuir model (R 2 is 0.85). Thermodynamic study showed that the adsorption process is endothermic and mainly physical in nature with the values of H 0 being 48.0 kJ/mol, S 0 being 157.1 J/mol/K, and G 0 varying from 1.02 to −2.14 kJ/mol. The graphite-like structure in biochar enables the π-π interactions with a ring structure in the TC molecule, which, together with the N-6 acting as electron donor, is the main driving force of the adsorption process.

Features and Commercial Performance of a System of Biomass Gasification for Simultaneous Clean Heating and Activated Carbon Production

“…Table 3 lists the BET surface area, iodine adsorption value, and methylene blue adsorption value of FAC, which are about 950 m 2 /g, 1000 mg/g, and 150 mL/g, respectively. Moreover, the surface area of FGC is more than those of other biochar samples such as fiberboard biochar, 26 rice straw biochar, 27 and switchgrass biochar. 28 Currently, the yield of FAC from this biomass gasification system in China is ∼39% that of the traditional activated carbon production process.…”

Preparation of Sepiolite Nanofibers Supported Zero Valent Iron Composite Material for Catalytic Removal of Tetracycline in Aqueous Solution

“…Particularly, the abuse of antibiotics has led to the gradual accumulation in soil and water environments, which enhances the bacterial resistance and endangers various ecosystems ( Dong et al, 2018 ; Pirsaheb et al, 2019 ). Among various antibiotics, tetracycline is the most extensively used antibiotic around the world because of its low cost and high antimicrobial activities ( Xu et al, 2020 ; Zhao et al, 2020 ). However, only a small fraction of tetracycline can be metabolized or adsorbed by humans or animals, 50–80% residuals and metabolites enter into the environment.…”

The Optimization Parameters of Activated Biochar Derived From Pine Pyrolysis: Application in Methylene Blue Adsorption

“…(Kang et al, 2016;Pirsaheb et al, 2016;Wan et al, 2017). Among them, the physical adsorption represented by carbon materials has the advantages of simple process, easy operation and recovery, various adsorbents, and no secondary pollution, etc., making it the most promising technical means for industrial application in the filed of water purification (Li et al, 2019a;Xu et al, 2020;Zeng et al, 2018). Activated biochar (AC) is characterized by abundant pore structure, strong adsorption capacity, and renewability (Gao et al, 2013;Genuino et al, 2018), which is of great significant for the treatment of industrial waste liquid and the remediation of environmental pollution (Li et al, 2019b).…”