Adsorption of copper and zinc by biochars produced from pyrolysis of hardwood and corn straw in aqueous solution

被引：1201

作者：

Chen, Xincai ^{[2
,5
]}

Chen, Guangcun ^{[2
]}

Chen, Linggui ^{[2
]}

Chen, Yingxu ^{[2
]}

Lehmann, Johannes ^{[3
]}

McBride, Murray B. ^{[3
,4
]}

Hay, Anthony G. ^{[1
,5
]}

机构：

[1] Cornell Univ, Inst Comparat & Environm Toxicol, Ithaca, NY 14853 USA

[2] Zhejiang Univ, Inst Environm Sci & Technol, Hangzhou 310029, Zhejiang, Peoples R China

[3] Cornell Univ, Dept Crop & Soil Sci, Ithaca, NY 14853 USA

[4] Cornell Univ, Cornell Ctr Waste Management, Ithaca, NY 14853 USA

[5] Cornell Univ, Dept Microbiol, Ithaca, NY 14853 USA

来源：

BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 19期

关键词：

Biochar; Copper; Zinc; Adsorption kinetic; Adsorption isotherm; ACTIVATED CARBON; HEAVY-METALS; SORPTION; CHARS; WOOD; MANURE; WATER; LEAD; TEMPERATURES; CONTAMINANTS;

D O I：

10.1016/j.biortech.2011.06.078

中图分类号：

S2 [农业工程];

学科分类号：

082806 [农业信息与电气工程];

摘要：

Biochars produced by pyrolysis of hardwood at 450 degrees C (HW450) and corn straw at 600 degrees C (CS600) were characterized and investigated as adsorbents for the removal of Cu(II) and Zn(II) from aqueous solution. The adsorption data were well described by a Langmuir isotherm, with maximum Cu(II) and Zn(II) adsorption capacities of 12.52 and 11.0 mg/g for CS600, 6.79 and 4.54 mg/g for HW450, respectively. Thermodynamic analysis suggested that the adsorption was an endothermic process and did not occur spontaneously. Although Cu(II) adsorption was only marginally affected by Zn(II). Cu(II) competed with Zn(II) for binding sites at Cu(II) and Zn(II) concentrations >= 1.0 mM. Results from this study indicated that plant-residue or agricultural waste derived biochar can act as effective surface sorbent, but their ability to treat mixed waste streams needs to be carefully evaluated on an individual basis. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：8877 / 8884

页数：8

共 46 条

[1]

[Anonymous], B EXPT FOREST HOKKAI

[2]

Removal of copper (II) from aqueous solution by adsorption onto low-cost adsorbents [J].