Preparation and adsorption properties of corncob based biochar

Journal of Lanzhou University of Technology ›› 2020, Vol. 46 ›› Issue (6): 77-84.

• Chemical Industry and Light Industry • Previous Articles Next Articles

Preparation and adsorption properties of corncob based biochar

WEI Hui-ge¹, LI Dai-yuan¹, MA Jun-hui¹, ZHOU Deng-feng¹, CUI Da-peng²

1. College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China;
2. College of Light Industry Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China

Received:2020-04-17 Online:2020-12-28 Published:2021-01-07

Abstract

Abstract: Using agricultural waste corncob as raw material, biochar with low cost and high performance was prepared by hydrothermal carbonization (HTC) at different temperatures. The biochar has mesoporous structure and abundant oxygen-containing functional groups on its surface, such as —OH, C ==O, C—O and so on. Methylene blue (MB) was used as model adsorbent to further study the adsorption properties of the biochar. Results from the study of adsorption kinetics show that the adsorption behavior is in accordance with the pseudo second-order kinetics model, and the biochar obtained under the hydrothermal condition of 225 ℃ has the maximum adsorption capacity (41.37 mg/g) and the maximum adsorption rate. The adsorption equilibrium data agree well with the Langmuir isotherm model, indicating that the adsorption of MB on biochar belongs to monolayer adsorption, and the interaction between oxygen-containing functional groups on the surface of the biochar and the MB molecule is helpful to the adsorption process.

Key words: corncob, hydrothermal carbonization, biochars, adsorption

CLC Number:

TQ013

WEI Hui-ge, LI Dai-yuan, MA Jun-hui, ZHOU Deng-feng, CUI Da-peng. Preparation and adsorption properties of corncob based biochar[J]. Journal of Lanzhou University of Technology, 2020, 46(6): 77-84.

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Preparation and adsorption properties of corncob based biochar

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