Rice straw as precursor of activated carbons: Activation with ortho-phosphoric acid

被引：118
|
作者：
Fierro, V. [1 ]
Muniz, G. [1 ,2 ]
Basta, A. H. [3 ]
El-Saied, H. [3 ]
Celzard, A. [1 ]
机构：
[1] Nancy Univ, Inst Jean Lamour, UMR CNRS 7198, UPV Metz,ENSTIB, F-88051 Epinal 9, France
[2] Univ Autonoma Chihuahua, Fac Ciencias Quim, Chihuahua, Mexico
[3] Natl Res Ctr, Cellulose & Paper Dept, Cairo 12622, Egypt
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 181卷 / 1-3期
关键词：
Rice straw; Activated carbon; H(3)PO(4); Methylene blue; Adsorption; CHEMICAL ACTIVATION; KRAFT LIGNIN; ADSORPTION; POROSITY; WOOD; IMPREGNATION; CAPACITY; SHELLS;
D O I：
10.1016/j.jhazmat.2010.04.062
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Highly mesoporous activated carbons (ACs) with a mesopore fraction ranging from 42 to 73% were obtained by activation of rice straw (RS) with ortho-phosphoric acid (PA). Due to such a high mesoporosity, these ACs can be successfully used for pollutant removal in aqueous phase. The ACs were prepared at activation temperatures (T) ranging from 350 to 500 degrees C, using PA to RS weight ratios (R) from 0 to 1.6 and activation times from 0 to 2 h. They were characterised by nitrogen adsorption at -196 degrees C, SEM-EDX, and methylene blue adsorption. RS is a very heterogeneous material with a variable content of mineral matter: using the product of activated carbon yield multiplied by surface area (C x S(BET)) as the performance criterion, the best AC was produced at T = 450 degrees C and R >= 1. These conditions lead to S(BET) higher than 500 m(2) g(-1) and a C x S(BET) around 270 m(2) g(-1). (C) 2010 Elsevier B.V. All rights reserved.
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页码：27 / 34
页数：8
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