Nitrogen-doped lignin-derived biochar with enriched loading of CeO2 nanoparticles for highly efficient and rapid phosphate capture

Gao-Jie Jiao; Jiliang Ma; Yuheng Zhang; Dongnv Jin; Yancong Li; Chensheng Hu; Yanzhu Guo; Zhiwei Wang; Jinghui Zhou; Runcang Sun

doi:10.1016/j.ijbiomac.2021.05.109

Nitrogen-doped lignin-derived biochar with enriched loading of CeO₂ nanoparticles for highly efficient and rapid phosphate capture

Int J Biol Macromol. 2021 Jul 1:182:1484-1494. doi: 10.1016/j.ijbiomac.2021.05.109. Epub 2021 May 18.

Authors

Gao-Jie Jiao¹, Jiliang Ma², Yuheng Zhang¹, Dongnv Jin¹, Yancong Li¹, Chensheng Hu¹, Yanzhu Guo³, Zhiwei Wang⁴, Jinghui Zhou¹, Runcang Sun⁵

Affiliations

¹ Liaoning Key Laboratory of Lignocellulosic Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
² Liaoning Key Laboratory of Lignocellulosic Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fuzhou 350108, China. Electronic address: jlma@dlpu.edu.cn.
³ Liaoning Key Laboratory of Lignocellulosic Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China. Electronic address: guoyz@dlpu.edu.cn.
⁴ Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
⁵ Liaoning Key Laboratory of Lignocellulosic Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China. Electronic address: rcsun3@dlpu.edu.cn.

PMID: 34019923
DOI: 10.1016/j.ijbiomac.2021.05.109

Abstract

Development of lignin-derived carbon adsorbents with ultrahigh phosphate adsorption activity and rapid adsorption kinetics is of great importance, yet limited success has been achieved. Herein, we develop a CeO₂ functionalized N-doped lignin-derived biochar (Ce@NLC) via a cooperative modification strategy for effective and fast phosphate capture. The novel modification strategy not only contributes greatly to the loading of well-dispersed CeO₂ nanoparticles with a smaller size, but also significantly increases the relative concentration of Ce(III) species on Ce@NLC. Consequently, an enhanced capture capacity for phosphate (196.85 mg g^-1) as well as extremely rapid adsorption kinetics were achieved in a wide operating pH range (2-10). Interestingly, Ce@NLC exhibited a strong phosphate adsorption activity at even low-concentration phosphorus-containing water. The removal efficiency and final P concentration reached 99.87% and 2.59 μg P L^-1 within 1 min at the phosphate concentration of 2 mg P L^-1. Experiments and characterization indicated that Ce(III) species plays a predominant role for the phosphate capture, and ligand exchange, together with electrostatic attraction, are the main adsorption mechanism. This work develops not only an efficient carbon-based adsorbent for phosphate capture, but also promotes the high-value application of industrial lignin.

Keywords: Industrial lignin; N-doped biochar; Phosphate capture.

MeSH terms

Cerium / chemistry*
Lignin / chemistry*
Metal Nanoparticles / chemistry*
Nitrogen / chemistry*
Phosphates / chemistry*

Substances

Phosphates
Cerium
ceric oxide
Lignin
Nitrogen