Fabrication of methyl acrylate and tetraethylenepentamine grafted magnetic chitosan microparticles for capture of Cd(II) from aqueous solutions

Haifeng Zhang; Qifeng Dang; Chengsheng Liu; Dejun Yu; Yan Wang; Xiaoying Pu; Yan Liu; Yuanyuan Liang; Dongsu Cha

doi:10.1016/j.jhazmat.2018.12.006

Fabrication of methyl acrylate and tetraethylenepentamine grafted magnetic chitosan microparticles for capture of Cd(II) from aqueous solutions

J Hazard Mater. 2019 Mar 15:366:346-357. doi: 10.1016/j.jhazmat.2018.12.006. Epub 2018 Dec 7.

Authors

Haifeng Zhang¹, Qifeng Dang¹, Chengsheng Liu², Dejun Yu³, Yan Wang¹, Xiaoying Pu¹, Yan Liu¹, Yuanyuan Liang¹, Dongsu Cha⁴

Affiliations

¹ College of Marine Life Sciences, Ocean University of China, No. 5 Yushan Road, Qingdao 266003, PR China.
² College of Marine Life Sciences, Ocean University of China, No. 5 Yushan Road, Qingdao 266003, PR China. Electronic address: liucsouc@126.com.
³ Qingdao Marine Biomedical Research Institute, No. 23 Hong Kong East Road, Qingdao 266071, PR China.
⁴ The Graduate School of Biotechnology, Korea University, Seoul 136-701, South Korea.

PMID: 30530027
DOI: 10.1016/j.jhazmat.2018.12.006

Abstract

MCS-MA-TEPA microparticles, with 251.22 mg g^-1 of adsorption capacity for Cd(II), higher than most of the counterparts, were first fabricated by chemical coprecipitation, spray drying, and Michael addition reaction, without any cross-linker participation. These Fe₃O₄-nanoparticle-embedded microparticles of 5.95 μm in size, derived from modifications by methyl acrylate (MA) and tetraethylenepentamine (TEPA) on magnetic chitosan (MCS) microparticles, were of plum-pudding-like and wrinkle-like topography portrayed by TEM and SEM. Such features were beneficial to adsorbent recycling and Cd(II) capture. BET examinations illustrated 6.084 m² g^-1 of specific surface area, 0.015 mL g^-1 of pore volume, and 6.536 nm of pore diameter. FTIR, VSM, XRD, TEM-SAED, TG, and DTG characterizations were indicative of successful synthesis, satisfactory magnetism, well-defined architecture, and good thermostability. Optimal adsorption parameters for Cd(II) were determined via batch experiments. Thermodynamic parameters and adsorption data fitting implied an exothermic, spontaneous, monolayer, and chemisorption process. XPS analyses confirmed a potential adsorption mechanism that N and O atoms on microparticles chelated with Cd(II) ions in solutions. Additionally, MCS-MA-TEPA-Cd(II) microparticles were magnetically separated easily and had outstanding reusability even after five-time recycling, with a slight adsorption capability loss (< 12%). Altogether, MCS-MA-TEPA microparticles might serve as a promising adsorbent for contaminated water scavenging.

Keywords: ADsorption mechanism; Cd(II); Magnetic chitosan-based microparticle; Methyl acrylate; Tetraethylenepentamine.

Publication types

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