首页|Mg(NO3)2·6H2O-Assisted in situ-Fabrication of Tea Residual Biochar for Ultra-Fast and High Adsorption of Rhodamine B

Mg(NO3)2·6H2O-Assisted in situ-Fabrication of Tea Residual Biochar for Ultra-Fast and High Adsorption of Rhodamine B

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In this work,porous biochar(MN-TRB750)was fabricated via direct pyrolysis of tea residue(TR)and Mg(NO3)2·6H2O(MN).The as-synthesized MN-TRB750 reached a specific surface area of 839.54 m2·g-1 and an average pore size of 3.75 nm with multi-level pore architecture.MN decreased TR's carbonization temperature and promoted the aromatics extent,pore structure for the frizzly flake-like bio-char.Rhodamine B(RhB)was chosen as the adsorbate to explore the removal performance of organic dyes in this study.The results indi-cated that the maximum adsorption capacity of RhB on MN-TRB750 at 20 ℃ is up to 809.0 mg·g-1 with isotherms fitted well to Freundlich and Dubinin-Radushkevic models.The adsorption kinetics followed pseudo-second-order and Elovich models with an equilibrium adsorp-tion capacity of 757.6 mg·g-1 as the initial concentration of RhB is 260 mg·L-1.High pore filling,hydrogen bond,π-π interaction deter-mined the adsorption of RhB onto MN-TRB850 through a multi-active center and exothermic chemical sorption process.

Mg(NO3)2·6H2Oporous biocharmechanismrhodamine Badsorption

HU Dandan、XUE Yangfan、LIU Bo、WU Yongjuan、LI Zichen

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School of Chemistry & Chemical Engineering,Shaanxi Xueqian Normal University,Xi'an 710100,Shaanxi,China

Safe College,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China

Innovation and Entrepreneurship Plan Project of Shaanxi ProvinceShaanxi Xueqian Normal University for College StudentsShaanxi Xueqian Normal University for College Students

S2023143900482023DC048

2024

10.1051/wujns/2024292165

武汉大学自然科学学报(英文版)
武汉大学

武汉大学自然科学学报(英文版)

CSTPCD
影响因子：0.066
ISSN：1007-1202
年,卷(期)：2024.29(2)
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