Phosphorylated biomass-derived porous carbon material for efficient removal of U(VI) in wastewater

Yanbing Sun; Haoyan Zhang; Nan Yuan; Yulin Ge; Ying Dai; Zhen Yang; Liang Lu

doi:10.1016/j.jhazmat.2021.125282

Phosphorylated biomass-derived porous carbon material for efficient removal of U(VI) in wastewater

J Hazard Mater. 2021 Jul 5:413:125282. doi: 10.1016/j.jhazmat.2021.125282. Epub 2021 Jan 30.

Authors

Yanbing Sun¹, Haoyan Zhang², Nan Yuan¹, Yulin Ge¹, Ying Dai³, Zhen Yang⁴, Liang Lu⁵

Affiliations

¹ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, Guangdong 519082, PR China.
² The Fourth Research and Design Engineering Institute of China National Nuclear Corporation, Shijiazhuang, Hebei 050022, PR China; State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi 330013, PR China.
³ State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi 330013, PR China.
⁴ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, Guangdong 519082, PR China. Electronic address: yangzh97@mail.sysu.edu.cn.
⁵ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, Guangdong 519082, PR China. Electronic address: luliang3@mail.sysu.edu.cn.

PMID: 33582468
DOI: 10.1016/j.jhazmat.2021.125282

Abstract

A simple strategy to prepare cost-effective adsorbent materials for the removal of U(VI) in radioactive wastewater is of great significance to environmental protection. Here, activated orange peel was used as a precursor for the synthesis of biomass charcoal, and then a phosphorylated honeycomb-like porous carbon (HLPC-PO₄) material was prepared through simple phosphorylation modification. FT-IR and XPS showed that P-O-C, P-C, and P˭O bonds appeared in HLPC-PO₄, indicating that the phosphorylation process is mainly the reaction of C-O bonds on the surface of the material with -PO₄. The results of the batch experiments showed that the uptake equilibrium of HLPC-PO₄ to U(VI) occurred within 20 min, and the kinetic simulation showed that the process was monolayer chemical adsorption. Interestingly, the maximum U(VI) uptake capacity of HLPC-PO₄ at T = 298.15 K and pH = 6.0 was 552.6 mg/g, which was more than 3 times that of HLPC. In addition, HLPC-PO₄ showed an adsorption selectivity of 70.1% for U(VI). After 5 cycles, HLPC-PO₄ maintained its original adsorption capacity of 90.5%. The adsorption mechanism can be explained as the complexation of U(VI) with P-O and P˭O on the surface of the adsorbent, confirming the strong bonding ability of -PO₄ to U(VI).

Keywords: Adsorption; Biomass; Phosphorylation; Porous Carbon; U(Ⅵ).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Biomass
Carbon*
Porosity
Spectroscopy, Fourier Transform Infrared
Wastewater*

Substances

Waste Water
Carbon