Effect of a magnetic field on the adsorptive removal of methylene blue onto wheat straw biochar

被引：144

作者：

Li, Guoting ^{[1
]}

Zhu, Weiyong ^{[1
]}

Zhang, Chunyu ^{[1
]}

Zhang, Shen ^{[1
]}

Liu, Lili ^{[1
]}

Zhu, Lingfeng ^{[1
]}

Zhao, Weigao ^{[2
]}

机构：

[1] North China Univ Water Resources & Elect Power, Dept Environm & Municipal Engn, Zhengzhou 450011, Peoples R China

[2] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2016年 / 206卷

基金：

美国国家科学基金会;

关键词：

Biochar; Adsorption; Magnetic field; Methylene blue; DIFFERENT PYROLYTIC TEMPERATURES; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; PINE WOOD; KINETICS; SORPTION; CONTAMINANTS; WATER; ADSORBENTS; DESORPTION;

D O I：

10.1016/j.biortech.2015.12.087

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Biochar pyrolyzed from wheat straw was innovatively used for the adsorptive removal of cationic dye methylene blue through exposure to a magnetic field. The adsorption capability of the biochar pyrolyzed at 200 degrees C exceeded that of samples pyrolyzed at higher temperatures. The surface acidic functional groups of wheat straw biochar were deduced to be more sensitive to the effects of the external magnetic field. The enhancement of the magnetic field achieved by increases in the initial dye concentration, and a decrease in the biochar dosage and solution pH, were more significant compared with those caused by other conditions. Kinetic experiments indicated that chemisorption occurred during adsorption. The q(max) values for dye adsorption without, and with, an external magnetic field were found to be 46.6 and 62.5 mg/g, respectively. These demonstrated that wheat straw biochar could be used for the efficient adsorption of pollutants when assisted by an external magnetic field. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：16 / 22

页数：7

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