水热碳化
热液循环
生物量(生态学)
木屑
碳化
吸附
化学
锌
化学工程
有机化学
农学
生物
工程类
作者
Feiyue Li,Andrew R. Zimmerman,Xin Hu,Zebin Yu,Jun Huang,Bin Gao
出处
期刊:Chemosphere
[Elsevier]
日期:2020-09-01
卷期号:254: 126866-126866
被引量:87
标识
DOI:10.1016/j.chemosphere.2020.126866
摘要
Hydrochar, the product of hydrothermal carbonization of biomass, is a sustainable alternative to other carbonaceous environmental sorbents. However, its use has been limited due to its low surface area. A one-pot biomass/metal salt co-hydrothermal synthesis method might improve its sorptive properties while retaining its efficient production characteristic. Thus, bamboo sawdust and zinc chloride (ZnCl2) were combined in a hydrothermal reactor (200 °C, 7 h) for preparing modified hydrochar. Compared to the non-modified hydrochar, the hydrochar produced with the addition of ZnCl2 during hydrothermal treatment was more fully carbonized (C content increased from 54% to 64%), of higher surface area after acid washing (30 versus 1.7 m2 g−1), and enriched in O-containing functional groups and of greater aromaticity (according to FTIR and XRD analysis). Because of these improved properties, Methylene blue adsorption capacity of the modified hydrochar increased by nearly 90% and by 257% after it was rinsed with acid. This study highlights the potential of this one-pot co-hydrothermal treatment of biomass in presence of metal salt to provide a simple and effective hydrochar with properties suitable for environmental remediation and water treatment.
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