Preparation of functionalized magnetic graphene oxide/lignin composite nanoparticles for adsorption of heavy metal ions and reuse as electromagnetic wave absorbers

被引：61

作者：

Du, Boyu ^{[1
]}

Chai, Lanfang ^{[1
]}

Li, Wei ^{[1
]}

Wang, Xing ^{[1
]}

Chen, Xiaohong ^{[1
,2
]}

Zhou, Jinghui ^{[1
]}

Sun, Run-Cang ^{[1
]}

机构：

[1] Dalian Polytech Univ, Liaoning Key Lab Lignocellulose Chem & Biomat, Dalian 116034, Liaoning, Peoples R China

[2] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2022年 / 297卷

基金：

中国国家自然科学基金;

关键词：

Lignin-based nanoparticles; Magnetic absorbent; Heavy metal ions; Adsorption capacity; Electromagnetic wave absorption; MICROWAVE-ABSORPTION; ORGANIC-FRAMEWORKS; LIGNIN; CARBON; NI; REMOVAL; OXIDE; PERFORMANCE; NANOCOMPOSITE; MICROSPHERES;

D O I：

10.1016/j.seppur.2022.121509

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Graphene oxide/magnetic lignin-based nanoparticles (GO-MLNPs) were successfully prepared for adsorbing heavy metal ions. Then the spent adsorbents (M2+@GO-MLNPs) were unprecedentedly applied as efficient electromagnetic wave absorption (EMWA) materials. The structures and performances of the prepared GOMLNPs were comprehensively characterized with various analytical methods. Adsorption experiments were studied in detail to identify the influence of various factors. The maximum adsorption capacities (Qmax) of Pb2+ and Ni2+ ions would be up to 147.88 and 110.25 mg/g, respectively. Notably, the adsorption rate could be maintained over 85% after 5 sorption-desorption cycles. After the adsorption, in order to reduce the secondary pollution, the spent adsorbents were recycled as novel EMWA materials via carbonization process (M2+@GO-CMLNPs). Surprisingly, the reflection loss (RL) of Ni2+@GO-CMLNPs reached-39.2 dB at 4.56 GHz under the thickness of 5.0 mm. In short, the low-cost and renewable GO-MLNPs not only have the large adsorption capacity of heavy metal ions but also can be reused after adsorption process as efficient electromagnetic wave (EMW) absorbers.

引用

页数：13

共 86 条

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