Cadmium removal potential by rice straw-derived magnetic biochar

被引：83
作者：
Tan, Zhongxin [1 ]
Wang, Yuanhang [1 ]
Kasiuliene, Alfreda [2 ]
Huang, Chuanqin [1 ]
Ai, Ping [3 ]
机构：
[1] Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China
[2] Aleksandras Stulginskis Univ, Inst Environm & Ecol, LT-53361 Kaunas, Lithuania
[3] Huazhong Agr Univ, Coll Engn, Wuhan 430070, Peoples R China
来源：
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY | 2017年 / 19卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Biochar; Magnetic biochar; Cadmium; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; HEAVY-METALS; ADSORPTION; PYROLYSIS; SORPTION; SINGLE; CHARS; COST; IONS;
D O I：
10.1007/s10098-016-1264-2
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Cadmium removal from wastewater is a difficult problem, so our aim was to develop a novel biochar and method of biochar preparation for the high-efficiency removal of cadmium. First, common biochars created using different pyrolysis conditions were tested to determine the best absorbance using the iodine absorption test. Magnetic biochar was prepared using a one-step synthesis by treating rice straw with Fe2+/Fe3+ and pyrolizing using the working conditions that exhibited the best absorbance. Second, the prepared biochars were used as adsorbents for Cd(II) removal from a solution. The magnetic biochar showed high efficiency for the removal of Cd(II): up to 91 %. This rate is much greater than that of the original biochar.
引用
收藏
页码：761 / 774
页数：14
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