Preparation of Mg,N-co-doped lignin adsorbents for enhanced selectivity and high adsorption capacity of As (V) from wastewater--颗粒学报PARTICUOLOGY

Shi, X., Hong, J., Wang, C., Kong, S., Li, J., Pan, D., . . . Guo, Z. (2021). Preparation of Mg,N-co-doped lignin adsorbents for enhanced selectivity and high adsorption capacity of As (V) from wastewater. Particuology, 58, 206-213. https://doi.org/10.1016/j.partic.2021.03.014

Preparation of Mg,N-co-doped lignin adsorbents for enhanced selectivity and high adsorption capacity of As (V) from wastewater

Xiaofeng Shi^a *, Junmao Hong ^a, Chao Wang ^a, Sifang Kong^b *, Junhua Li ^a *, Duo Pan ^d^{e f}, Jing Lin^c *, Qinglong Jiang ^f, Zhanhu Guo^e *

a School of Environment and Safety Engineering, Institute of Advanced Energy Materials and Systems, North University of China, Taiyuan 030051, China
b School of Traffic & Environment, Shenzhen Institute of Information Technology, Shenzhen 518172, China
c School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
d Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, China
e Integrated Composites Laboratory (ICL), Department of Chemical and Bimolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
f Department of Chemistry and Physics, University of Arkansas, Pine Bluff, AR 71601, USA

10.1016/j.partic.2021.03.014

Volume 58, October 2021, Pages 206-213

Received 6 February 2021, Revised 21 March 2021, Accepted 22 March 2021, Available online 21 April 2021, Version of Record 18 May 2021.

E-mail: xiaofeng_shi1987@163.com; mengsiksf@163.com; 418410200@qq.com; linjing@gzhu.edu.cn; zguo10@utk.edu

Highlights

• Mg,N-co-doped lignin (MNL) has been successfully prepared by a simple method.

• MNL owns a spherical structure and achieves a good adsorption effect.

• MNL has enhanced selectivity on As (V) with a maximum capacity of 687.46 mg g⁻¹.

• MNL shows excellent reusability on the As (V) adsorption.

• MNL adsorbs As (V) through chemical and electrostatic interaction.

Abstract

Among various environmental problems, water pollution has drawn more and more attention. To develop an adsorbent with enhanced selectivity and high capacity for As (V) oxyanion, a novel lignin-based adsorbent was prepared by doping with N and modifying with Mg²⁺, using thiethylenetetramine (TETA) and MgCl₂ as the source of N and Mg²⁺, respectively. N-doped lignin (NL) shows a high selectivity for As (V), which is further enhanced by modifying with Mg²⁺ (MNL). MNL shows an excellent reusability. The adsorption isotherms and kinetics of MNL for As (V) follow Langmuir isotherms model and pseudo-second-order kinetics model, respectively. The adsorption of MNL for As (V) achieved a maximum adsorption capacity of 687.46 mg g⁻¹ and the equilibrium was established within 30 min. This study offers a novel idea on the recycle of the waste of paper industry and provides a new technology for As (V) adsorption from wastewater.

Graphical abstract

Keywords

Adsorbents; Doping; Heavy metals; Adsorption; Selectivity

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