- Title
- Mechanistic insights of 2,4-D sorption onto biochar: influence of feedstock materials and biochar properties
- Creator
- Mandal, Sanchita; Sarkar, Binoy; Igalavithana, Avanthi Deshani; Ok, Yong Sik; Yang, Xiao; Lombi, Enzo; Bolan, Nanthi
- Relation
- Bioresource Technology Vol. 246, Issue December, p. 160-167
- Publisher Link
- http://dx.doi.org/10.1016/j.biortech.2017.07.073
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- 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.
- Subject
- 2,4-D; biochar; pyrolysis; physical activation; sorption kinetics
- Identifier
- http://hdl.handle.net/1959.13/1389916
- Identifier
- uon:32949
- Identifier
- ISSN:0960-8524
- Rights
- © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Language
- eng
- Full Text
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