Biomaterial Database

Preparation and Characteristics of a Novel Sorptive Extraction Stir Bar Based on Cd-Imprinted Polymer Monoliths. 2016

Shiru Wang, and Sui Wang

Ningbo University, Faculty of Materials Science and Chemical Engineering, Ningbo, 315211, China.

A novel monolithic stir-bar for Cd(II) sorption extraction was prepared by ion-imprinting technology and in situ stepwise polymerization of epoxy resin (EP). The condensation product of diethylenetriamine and thiourea (DETATUC) was used as a curing agent, with Cd ions as template ions and polyethylene glycol 1540 as a porogenic agent. The main parameters of the stir-bar sorption extraction-EP-DETATUC material for the extraction and desorption of Cd(II) in aqueous solution were investigated, and inductively coupled plasma-atomic emission spectrometry was performed. The results showed that the monolithic material possessed good permeability and reusability. The maximum adsorption capacity was 136.58 μmol g(-1) at pH 6.0. The optimized conditions were the following: stirring rate at 300 rpm, adsorption time at 40 min, elution media at 0.25 mol L(-1) EDTA, and elution time at 20 min. The accuracy of the method was assessed by spiking two water samples and one plant sewage sample with Cd at two concentration levels. Recoveries of 96-102% were obtained.

UI	MeSH Term	Description	Entries
D011108	Polymers	Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).	Polymer
D002104	Cadmium	An element with atomic symbol Cd, atomic number 48, and atomic weight 112.41. It is a metal and ingestion will lead to CADMIUM POISONING.
D000327	Adsorption	The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily.	Adsorptions
D013499	Surface Properties	Characteristics or attributes of the outer boundaries of objects, including molecules.	Properties, Surface,Property, Surface,Surface Property
D052617	Solid Phase Microextraction	A solventless sample preparation method, invented in 1989, that uses a fused silica fiber which is coated with a stationary phase. It is used for sample cleanup before using other analytical methods.	Microextraction, Solid Phase,Solid Phase Microextractions
D054802	Molecular Imprinting	A methodology for chemically synthesizing polymer molds of specific molecules or recognition sites of specific molecules. Applications for MOLECULARLY IMPRINTED POLYMERS (MIPs) include separations, assays and biosensors, and catalysis.	Molecular Imprinting Technique,Imprinting, Molecular,Imprinting Technique, Molecular,Imprinting Techniques, Molecular,Molecular Imprinting Techniques,Technique, Molecular Imprinting,Techniques, Molecular Imprinting