Modification of bio-char derived from fast pyrolysis of biomass and its application in removal of tetracycline from aqueous solution
Modification of bio-char derived from fast pyrolysis of biomass and its application in removal of tetracycline from aqueous solution
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DOI：
10.1016/j.biortech.2012.06.085
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发表时间：
2012-10-01
影响因子：
11.4
通讯作者：
Yu, Han-Qing
中科院分区：
文献类型：
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作者：
Liu, Pei;Liu, Wu-Jun;Yu, Han-Qing
本研究以生物质快速热解的副产物生物炭为吸附剂，对四环素进行吸附去除。为了提高生物质炭的吸附性能，对生物质炭进行了简单的酸碱改性。采用傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和氮气吸附-脱附等温线对生物质焦进行了表征。结果表明，碱处理后的生物质焦比生焦和酸处理后的生物质焦具有更大的比表面积，其吸附性能（58.8 mg/g）优于其他两种生物质焦和其他吸附剂。生物炭的类石墨结构有利于四环素分子中的环状结构与类石墨片之间形成π-π相互作用。在实验条件下，吸附剂的比表面积和含氧官能团对吸附效果有显著影响，而溶液的初始pH值对吸附效果的影响较小。(C)2012爱思唯尔有限公司保留所有权利。
In this work, bio-char, a mass productive by-product of biomass fast pyrolysis, was adopted as an adsorbent to remove tetracycline (TC) from aqueous solution. To enhance the adsorption capacity, a simple modification of bio-char with acid and alkali was carried out. Bio-char samples were characterized by Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption-desorption isotherm. The results show that the alkali treated bio-char possesses larger surface area than those of raw and acid treated bio-chars, and accordingly exhibits a more excellent adsorption performance (58.8 mg/g) than the other two bio-chars and other adsorbents reported previously. The graphite-like structure of bio-char facilitates the formation of pi-pi interactions between ring structure in tetracycline molecule and graphite-like sheets. The surface area showed significant effects on TC adsorption as well as O-containing functional groups, whereas the initial pH of solution has small effects on TC adsorption under the experimental conditions. (C) 2012 Elsevier Ltd. All rights reserved.