Controlled preparation of a MCC- g-AM/EDA/PA loaded Fe(iii) adsorbent by the pre-radiation grafting method and its application for the adsorption removal of phosphate

Yuan Zhao; Jin-Yu Yang; Ting-Ting Li; Guo Liu; Ya-Yang Wang; Yu Jiang; Zheng-Xi Wang; Fang-Fang Zhang; Yue-Sheng Li; Yi Liu

doi:10.1039/d0ra09389k

Controlled preparation of a MCC- g-AM/EDA/PA loaded Fe(iii) adsorbent by the pre-radiation grafting method and its application for the adsorption removal of phosphate

RSC Adv. 2021 Feb 3;11(11):6173-6181. doi: 10.1039/d0ra09389k. eCollection 2021 Feb 2.

Authors

Yuan Zhao^{1

2}, Jin-Yu Yang^{1

2}, Ting-Ting Li², Guo Liu², Ya-Yang Wang^{1

2}, Yu Jiang², Zheng-Xi Wang², Fang-Fang Zhang², Yue-Sheng Li², Yi Liu^{1

3}

Affiliations

¹ Key Laboratory of Coal Conversion, New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology Hubei Wuhan 430081 China frank78929@163.com yiliuchem@whu.edu.cn.
² Non-power Nuclear Technology Collaborative Innovation Center, Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science & Technology Hubei Xianning 437100 P. R. China.
³ State Key Laboratory of Separation Membranes and Membrane Processes, College of Chemistry and Chemical Engineering, College of Environmental Science and Engineering, Tiangong University Tianjin 300387 P. R. China.

Abstract

A new spherical cellulose-based adsorbent and high phosphate removal rate microcrystalline cellulose-g-acrylamide/ethylenediamine/phthalic anhydride (MCC-g-AM/EDA/PA) loaded Fe(iii) adsorbent was prepared by a pre-radiation grafting and chemical modification method. Fe(iii) was successfully introduced into the modified grafted chains of the MCC-g-AM/EDA/PA resin, and characterized by FTIR, TG, XRD, SEM and XPS. The optimized conditions for the grafting reaction of acrylamide (AM) onto MCC were 20% AM emulsion at an absorbed dose of 30 kGy, and a grafting rate as high as 247%. In addition, the adsorption performance of the adsorbent was tested by static adsorption experiments with phosphate. The adsorbent resin showed excellent adsorption performance under alkaline conditions, contributions to the synergetic effect of precipitation, and inner-sphere surface complex reactions. The adsorption efficiency can reach 89.7% at low concentration. In summary, the neotype spherical cellulose-based adsorbent has the advantages of being separation-free in bulk materials, avoiding secondary pollution, and being easy to recycle, and it could be employed as an environmentally friendly adsorbent for phosphate removal in eutrophic water.