Hydrophilic magnetic Ti3C2Tx-based nanocomposite as an efficient boron adsorbent: Synthesis, characterization, and application

Juan Bao; Tingting Zhang; Shiying Wu; Lujie Li; Xianhuai Huang; Weihua Li; Chang Liu; Jiansheng Li; Rui Lu

doi:10.1016/j.jhazmat.2023.132460

Hydrophilic magnetic Ti₃C₂T_x-based nanocomposite as an efficient boron adsorbent: Synthesis, characterization, and application

J Hazard Mater. 2023 Oct 15:460:132460. doi: 10.1016/j.jhazmat.2023.132460. Epub 2023 Sep 2.

Authors

Juan Bao¹, Tingting Zhang¹, Shiying Wu¹, Lujie Li¹, Xianhuai Huang², Weihua Li², Chang Liu³, Jiansheng Li¹, Rui Lu⁴

Affiliations

¹ Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China.
² School of Environment and Energy Engineering, Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Anhui Jianzhu University, Hefei 230022, People's Republic of China.
³ Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, People's Republic of China.
⁴ Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China. Electronic address: rlu@njust.edu.cn.

PMID: 37708646
DOI: 10.1016/j.jhazmat.2023.132460

Abstract

It is widely recognized that wastewater containing boron is an environmental issue. Therefore, the development of adsorbents with excellent adsorption capacity, stability, and recyclability is essential in water treatment applications. A Fe₃O₄/PDA/Ti₃C₂T_x/PEI/DHHA nanocomposite has been prepared that can be used to separate and recover boric acid by adjusting the pH of the solution, based on the affinity theory of boric acid and cis-diol. Through series characterization, it was determined that the adsorbent possessed good magnetic properties, high hydrophilicity and high loading capacities. In this study, 4-formylphenylboronic acid (FPBA) was selected as the model compound. The nanocomposite exhibited an adsorption equilibrium time of 10 h and an adsorption capacity of 98.99 mg/g at pH = 8.5 and 25 °C. The Langmuir isothermal model and the quasi-secondary kinetic model are both appropriate for describing the adsorption process. Thermodynamic results suggest that adsorption is a spontaneous chemisorption process. Furthermore, the nanocomposite retains good regeneration performance after five adsorption-desorption cycles.

Keywords: Affinity; Chemisorption; Isotherms; Kinetics; Regeneration.