Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 720, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.137662
Keywords
Pomelo peel; Tetracycline antibiotics; Biochar; Adsorption
Categories
Funding
- Centre for Technology in Water and Wastewater, University of Technology Sydney, Australia (UTS, RIA NGO)
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) of the Republic of Korea [20173010092470]
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20173010092470]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20173010092470] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Removal of tetracycline antibiotics (TCs) by biochar adsorption is emerging as a cost-effective and environmentally friendly strategy. This study developed a novel pomelo peel derived biochar, which was prepared at 400 degrees C (BC-400) and 600 degrees C (BC-600) under nitrogen conditions. To enhance the adsorption capacity, BC-400 was further activated by KOH at 600 degrees C with a KOH: BC-400 ratio of 4:1. The activated biochar (BC-KOH) displayed a much larger surface area (2457.37 m(2)/g) and total pore volume (1.14 cm(3)/g) than BC-400 and BC-600. High adsorption capacity of BC-KOH was achieved for removing tetracycline (476.19 mg/g), oxytetracycline (407.5 mg/g) and chlortetracycline (555.56 mg/g) simultaneously at 313.15 K, which was comparable with other biochars derived from agricultural wastes reported previously. The adsorption data could be fitted by the pseudo-second-order kinetic model and Langmuir isotherm model successfully. The initial solution pH indicated the potential influence of TCs adsorption capacity on BC-KOH. These results suggest that pore filling, electrostatic interaction and p-p interactions between the adsorbent and adsorbate may constitute the main adsorption mechanism. BC-KOH can be used as a potential adsorbent for removing TCs from swine wastewater effectively, cheaply and in an environmentally friendly way. (C) 2020 Elsevier B.V. All rights reserved.
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