Mechanisms and adsorption capacities of hydrogen peroxide modified ball milled biochar for the removal of methylene blue from aqueous solutions

被引:129
作者
Zhang, Yue [1 ]
Zheng, Yulin [1 ]
Yang, Yicheng [1 ]
Huang, Jinsheng [1 ]
Zimmerman, Andrew R. [2 ]
Chen, Hao [3 ]
Hu, Xin [4 ]
Gao, Bin [1 ]
机构
[1] Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA
[2] Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA
[3] Univ Arkansas Pine Bluff, Dept Agr, Pine Bluff, AR 71601 USA
[4] Nanjing Univ, Ctr Mat Anal, Nanjing 210093, Peoples R China
关键词
Biochar; Ball Milling; Oxidation; Methylene Blue; Adsorption; SURFACE FUNCTIONAL-GROUPS; HEAVY-METALS; HYDROTHERMAL CARBONIZATION; KINETICS; ROLES; BATCH;
D O I
10.1016/j.biortech.2021.125432
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
In this work, hickory chip biochars developed at distinctive pyrolysis temperatures were ball milled (BMHC) and then post-modified with a 10% hydrogen peroxide (H2O2) solution to obtain a set of novel sorbents (BMHCH2O2). The specific surface area (SSA) was dramatically increased after ball-milling while the hydroxyl and carboxyl groups on the surface of the biochars were further increased through H2O2 modification. Additionally, thermal stability of the biochar treated with ball-milling was not greatly reduced by H2O2 modification and hydrodynamic radius was decreased. Ball milling enhanced the adsorption efficiency to methylene blue (MB) by the biochar, and this ability was further increased by H2O2 modification, because of the increasing in oxygencontaining functional groups (OCFG) to interact with MB. The rate of MB adsorption to BMHC-H2O2 was faster than that of BMHC, reaching equilibrium after about 6 h. Among adsorbents tested, the 450 degrees C BMHCH2O2 had the greatest MB adsorption capacity (310 mg g-1).
引用
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页数:7
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