Influence of sodium dodecyl sulfate coating on adsorption of methylene blue by biochar from aqueous solution

被引：1

作者：

Wei Que ^{[1
]}

Luhua Jiang ^{[2
,3
]}

Chen Wang ^{[2
,3
]}

Yunguo Liu ^{[2
,3
]}

Zhiwei Zeng ^{[2
,3
]}

Xiaohua Wang ^{[2
,3
]}

Qimeng Ning ^{[2
,3
]}

Shaoheng Liu ^{[2
,3
]}

Peng Zhang ^{[2
,3
]}

Shaobo Liu ^{[4
,5
]}

机构：

[1] Department of Economics and Trade, Hunan University

[2] College of Environmental Science and Engineering, Hunan University

[3] Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education

[4] School of Architecture and Art Central South University, Central South University

[5] School of Metallurgy and Environmental, Central South University

来源：

Journal of Environmental Sciences | 2018年 / 08期

关键词：

Methylene blue; Surfactant; Adsorption; Biochar; Environmental implications;

D O I：

暂无

中图分类号：

X703 [废水的处理与利用];

学科分类号：

083002 ;

摘要：

Biochar is regarded as a promising new class of materials due to its multifunctional character and the possibility of effectively coupling different properties. With increasing introduction into the environment, environmental chemicals such as surfactants will load onto the released biochar and change its physicochemical characteristics and adsorption behavior toward pollutants. In this study, sodium dodecyl sulfate(SDS), as one type of anionic surfactant, was coated onto biochar with different loading amounts. The influence of SDS loading onto biochar's physicochemical properties were investigated by Fourier transform infrared(FT-IR) spectroscopy, elemental analysis, zeta potential and Brunauer–Emmett–Teller(BET) surface area and pore size distribution analysis. Results showed that the pore size of the biochar decreased gradually with the increase of SDS loading because of the surface-adsorption and pore-blocking processes; the p H of the point of zero charge(pHPZC) decreased with increasing SDS loading. Although surface-coating with SDS decreased the pore size of the biochar, its adsorption capacity toward Methylene Blue(MB) significantly increased. The biochar-bound SDS introduced functional groups and negative charges to the biochar surface, which could thus enhance the adsorption of MB via hydrogen bonding and electrostatic interaction. The results can shed light on the underlying mechanism of the influence of anionic surfactants on the adsorption of MB by biochar.

引用

页码：166 / 174

页数：9