Bio-based activated carbon from husk- and wood-based biomass: comparison of carbon activation methods on organic pollutants removal

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-02-15 DOI:10.2166/wpt.2023.019
Oleksii Tomin, M. Yazdani
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Abstract

This study aimed to investigate the effect of different activations on the properties of bio-based activated carbons (BACs) for water treatment. BACs were produced via pyrolysis by the carbonization stage and were followed by four different activation procedures. Chemical activation included the introduction of metal oxides or alkali on the structure of the sawdust-derived BACs, resulting in iron-activated carbon (BAC-Fe), copper-activated carbon (BAC-Cu), and sodium-activated carbon (BAC-Na). The physical activation was conducted in a CO2 environment with the usage of two types of locally available biomasses, resulting in husk-activated carbon (HAC) and wood-activated carbon (WAC). Depending on the activation, BACs can be developed with high porosity, active sites, and different additional functionalities such as antimicrobial and magnetic. The adsorption of natural organic matter (NOM) with chemically activated BACs yielded high removal percentages (97, 87, and 80% for BAC-Fe, BAC-Cu, and BAC-Na, respectively). The physically activated BACs demonstrated high adsorption capacities for dye – 278 mg/g for WAC and 213 mg/g for HAC. This outlines a wide range of BAC production possibilities with advanced functionalities.
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壳基和木质生物质生物基活性炭:活性炭活化方法去除有机污染物的比较
本研究旨在研究不同活化剂对水处理用生物基活性炭(BACs)性能的影响。BAC是通过碳化阶段的热解产生的,随后经过四种不同的活化程序。化学活化包括在木屑衍生的BAC的结构上引入金属氧化物或碱,产生铁活性炭(BAC-Fe)、铜活性炭(BAC-Cu)和钠活性炭(BAC-Na)。物理活化是在CO2环境中进行的,使用了两种当地可用的生物质,产生了外壳活性炭(HAC)和木材活性炭(WAC)。根据活化情况,BAC可以开发出高孔隙率、活性位点和不同的附加功能,如抗菌和磁性。化学活化的BACs对天然有机物(NOM)的吸附产生了高去除率(BAC-Fe、BAC-Cu和BAC-Na分别为97、87和80%)。物理活化的BAC对染料的吸附能力很高——WAC为278 mg/g,HAC为213 mg/g。这概述了具有先进功能的广泛BAC生产可能性。
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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