Mechanistic insights of 2,4-D sorption onto biochar:Influence of feedstock materials and biochar properties

Mandal, S and Sarkar, B and Igalavithana, AD and Ok, YS and Yang, X and Lombi, E and Bolan, N (2017) Mechanistic insights of 2,4-D sorption onto biochar:Influence of feedstock materials and biochar properties. Bioresource Technology, 246. pp. 160-167. ISSN 0960-8524

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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.

Item Type:
Journal Article
Journal or Publication Title:
Bioresource Technology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2311
Subjects:
ID Code:
140646
Deposited By:
Deposited On:
27 Jan 2020 14:55
Refereed?:
Yes
Published?:
Published
Last Modified:
09 Sep 2020 06:41