Functionalized nanoflower-like hydroxyl magnesium silicate for effective adsorption of aflatoxin B1

Zhiwei Sun; Di Huang; Xinhui Duan; Wei Hong; Jinsheng Liang

doi:10.1016/j.jhazmat.2019.121792

Functionalized nanoflower-like hydroxyl magnesium silicate for effective adsorption of aflatoxin B1

J Hazard Mater. 2020 Apr 5:387:121792. doi: 10.1016/j.jhazmat.2019.121792. Epub 2019 Nov 30.

Authors

Zhiwei Sun¹, Di Huang², Xinhui Duan², Wei Hong², Jinsheng Liang³

Affiliations

¹ Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China; Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education (Shandong University), Jinan 250061, People's Republic of China.
² Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China.
³ Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China. Electronic address: liangjinsheng@hebut.edu.cn.

PMID: 31818670
DOI: 10.1016/j.jhazmat.2019.121792

Abstract

Aflatoxin B1 (AFB1), which is widely found in food and feed, poses a serious threat to the health of human and livestock. In this work, functionalized nanoflower-like hydroxyl magnesium silicate (FNHMS) was synthesized for adsorption of AFB1. First, bulk magnesium silicate (MS) was converted into nanoflower-like hydroxyl magnesium silicate (NHMS) by hydroxylation. Cetyltrimethylammonium bromide (CTMAB) modification then enhanced the hydrophobicity and the affinity to AFB1 of NHMS. The adsorption performance for AFB1 followed the order of MS < NHMS < FNHMS, and the adsorption performance increased with the increase of the dose of CTMAB. Isothermal adsorption analysis indicated that the surface of FNHMS was heterogeneous. The adsorption capacity of FNHMS-0.4 to AFB1 was estimated to be 27.34 mg g^-1 and 28.61 mg g^-1 by Freundlich and Dubinin-Radushkevich isotherm adsorption model, respectively. By analyzing the adsorption kinetics and adsorption thermodynamics, both physical adsorption and chemisorption existed in the process of AFB1 being adsorbed on FNHMS-0.4. Adsorption mechanisms analysis indicated that the adsorption followed the adsorption site priority of H > O > Mg. This work demonstrates that FNHMS could be a promising adsorbent for removal of AFB1.

Keywords: Adsorption; Aflatoxin B1; Cetyltrimethylammonium bromide modification; Hydroxylation; Magnesium silicate.

Publication types

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

MeSH terms

Adsorption
Aflatoxin B1 / chemistry
Aflatoxin B1 / isolation & purification*
Cetrimonium / chemistry
Hydroxylation
Kinetics
Magnesium Silicates / chemistry*
Nanostructures / chemistry*
Thermodynamics

Substances

Magnesium Silicates
Florisil
Aflatoxin B1
Cetrimonium