Thermal treatment of biochar in the air/nitrogen atmosphere for developed mesoporosity and enhanced adsorption to tetracycline

Bioresource Technology
Xiaoxiao ZhuYimin Li

Abstract

For the purpose of producing carbons with developed mesoporosity, a wood biochar was thermally treated at 600-800 °C in the air/nitrogen atmosphere. The mesopore development was observed when the air flux increased to 50-90 mL/min, and the carbon product having high mesopore surface area (316 m2/g) and mesopore pore volume (0.284 cm3/g) was produced at the treatment temperature of 700 °C. The mesopores were developed mainly in the temperature holding stage of thermal treatment, with size mainly ranged from 20 to 60 Å. The carbons' adsorption to the antibiotic tetracycline was enhanced by 5.5-9.2 folds when the air/nitrogen mixture was used instead of nitrogen atmosphere in thermal treatment, and the enhanced adsorption is positively related to the mesopore development. In general, this research provides a facile way to produce carbons with developed mesoporosity, so as to improve their adsorption to bulky organic molecules.

Citations

Apr 12, 2020·Environmental Science and Pollution Research International·Jingen XiZhongxin Tan
Mar 20, 2020·Environmental Science and Pollution Research International·Rashida HameedDaohui Lin
Jul 12, 2021·Journal of Hazardous Materials·Lichun DaiHuagang Huang
Sep 10, 2021·Environmental Science and Pollution Research International·Jiawei Zhao, Yingjie Dai
Nov 18, 2021·The Science of the Total Environment·Bárbara Olinda NardisLeônidas Carrijo Azevedo Melo
Jan 16, 2022·Environmental Pollution·Mukesh Kumar Awasthi

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