Dye removal of activated carbons prepared from NaOH-pretreated rice husks by low-temperature solution-processed carbonization and H3PO4 activation
Dye removal of activated carbons prepared from NaOH-pretreated rice husks by low-temperature solution-processed carbonization and H3PO4 activation
复制标题
NaOH预处理稻壳制备的活性炭低温溶液炭化和H3PO4活化去除染料
DOI：
10.1016/j.biortech.2013.07.002
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发表时间：
2013-09-01
影响因子：
11.4
通讯作者：
Song, Xiao-Wei
中科院分区：
文献类型：
--
作者：
Chen, Yun;Zhai, Shang-Ru;Song, Xiao-Wei
采用低温硫酸辅助炭化和磷酸活化相结合的方法，将NaOH预处理后的稻壳转化为具有极高比表面积（2028 m2·g-1）和综合性能的活性炭。考察了活化温度和浸渍比对活性炭比表面积、孔容的影响。采用N-2吸附、FTIR、XPS、SEM、TEM等方法对活性炭的形貌和表面化学进行了表征。吸附过程符合Langmuir吸附等温式和准二级吸附动力学模型，最大单分子吸附量约为2.5mg/L。578 mg g（-1）。(C)2013爱思唯尔有限公司保留所有权利。
A coupling of low-temperature sulfuric acid-assisted carbonization and H3PO4 activation was employed to convert NaOH-pretreated rice husks into activated carbons with extremely high surface area (2028 m(2) g(-1)) and integrated characteristics. The influences of the activation temperature and impregnation ratio on the surface area, pore volume of activated carbons were thoroughly investigated. The morphology and surface chemistry of activated carbons were characterized using N-2 sorption, FTIR, XPS, SEM, TEM, etc. The adsorption capacity of resulting carbons obtained under optimum preparation conditions was systematically evaluated using methylene blue under various simulated conditions. The adsorption process can be well described by both Langmuir isotherm model and the pseudo-second order kinetics models; and the maximum monolayer capacity of methylene blue was ca. 578 mg g(-1). (C) 2013 Elsevier Ltd. All rights reserved.