Interactions between benzotriazole and corncob biochars pyrolyzed at different temperature

XING Chen; YU Cheng-long; BI Er-ping; DAI Jin-e

Volume 4 Issue 4

Dec. 2016

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Article Navigation > Journal of Groundwater Science and Engineering > 2016 > 4(4): 320-327

XING Chen, YU Cheng-long, BI Er-ping, et al. 2016: Interactions between benzotriazole and corncob biochars pyrolyzed at different temperature. Journal of Groundwater Science and Engineering, 4(4): 320-327.

Citation:

XING Chen, YU Cheng-long, BI Er-ping, et al. 2016: Interactions between benzotriazole and corncob biochars pyrolyzed at different temperature. Journal of Groundwater Science and Engineering, 4(4): 320-327.

Citation:

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Interactions between benzotriazole and corncob biochars pyrolyzed at different temperature

1School of Water Resources and Environment, and Beijing Key Laboratory of Water Resources and Environment Engineering, China University of Geosciences (Beijing), Beijing 100083, P. R. China. 2Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, P. R. China.

Publish Date: 2016-12-28

Abstract

Abstract

The sorption of ionizable benzotriazole (BTA) to corncob biochars pyrolyzed at different temperature (i.e., 300 oC, 500 oC and 800 oC) was investigated in this study. Biochars produced at higher temperature showed higher surface area, micropore volume and aromaticity. Consequently, the sorption of BTA changed from absorption to adsorption for biochars pyrolyzed at 300 oC and 800 oC, respectively. Solution pH affected speciation of BTA and surface charge properties of biochars. For BTA0, H-bond, partition and micropore filling are dominant sorption mechanisms. For BTA-, it is suggested that negative charge-assisted H-bond plays an important role in sorption. Corncob biochar pyrolyzed at high temperature (e.g., 800 oC) showed the highest sorption affinity for BTA. Ca2+ in solution enhanced BTA- and BTA0 sorption through cation-bridge and surface complexation.
- Benzotriazole,
- Biochar,
- H-bond,
- Micropore filling,
- Sorption,
- Charge-assisted H-bond

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References(28)

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