Abstract
Objective of this study was to investigate the mechanisms of 2,4-Dichlorophynoxy acetic acid (2,4-D) sorption on biochar in aqueous solutions. Sorption isotherm, kinetics, and desorption experiments were performed to identify the role of biochars’ feedstock and production conditions on 2,4-D sorption. Biochars were prepared from various green wastes (tea, burcucumber, and hardwood) at two pyrolytic temperatures (400 and 700 °C). The tea waste biochar produced at 700 °C was further activated with steam under a controlled flow. The sorption of 2,4-D was strongly dependent on the biochar properties such as specific surface area, surface functional groups, and microporosity. The steam activated biochar produced from tea waste showed the highest (58.8 mg g−1) 2,4-D sorption capacity, which was attributed to the high specific surface area (576 m2 g−1). The mechanism of 2,4-D removal from aqueous solution by biochar is mainly attributed to the formation of heterogeneous sorption sites due to the steam activation.
Original language | English |
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Pages (from-to) | 160-167 |
Number of pages | 8 |
Journal | Bioresource technology |
Volume | 246 |
DOIs | |
Publication status | Published - 2017 Dec |
Keywords
- 2,4-D
- Biochar
- Physical activation
- Pyrolysis
- Sorption kinetics
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal